./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-comm.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_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/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_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/mult-comm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/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_7d607194-5905-43c3-8ad5-464d107b0202/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 a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:54:51,078 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:54:51,147 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:54:51,153 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:54:51,153 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:54:51,179 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:54:51,180 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:54:51,181 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:54:51,182 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:54:51,182 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:54:51,183 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:54:51,184 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:54:51,184 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:54:51,185 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:54:51,185 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:54:51,186 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:54:51,186 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:54:51,187 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:54:51,187 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:54:51,188 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:54:51,188 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:54:51,189 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:54:51,189 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:54:51,190 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:54:51,190 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:54:51,191 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:54:51,191 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:54:51,192 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:54:51,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:54:51,193 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:54:51,193 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:54:51,194 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:54:51,194 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:54:51,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:54:51,194 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:54:51,195 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:54:51,195 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:54:51,195 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:54:51,195 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:54:51,196 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_7d607194-5905-43c3-8ad5-464d107b0202/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e [2023-11-06 22:54:51,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:54:51,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:54:51,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:54:51,541 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:54:51,542 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:54:51,543 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/mult-comm.wvr.c [2023-11-06 22:54:54,651 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:54:54,906 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:54:54,906 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/sv-benchmarks/c/weaver/mult-comm.wvr.c [2023-11-06 22:54:54,917 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/data/38482053f/9011d4a991a24b1aa7f34df71e839fc7/FLAGcd2b3a3db [2023-11-06 22:54:54,936 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/data/38482053f/9011d4a991a24b1aa7f34df71e839fc7 [2023-11-06 22:54:54,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:54:54,945 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:54:54,947 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:54:54,947 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:54:54,953 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:54:54,956 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:54" (1/1) ... [2023-11-06 22:54:54,957 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d7d8c31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:54, skipping insertion in model container [2023-11-06 22:54:54,957 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:54" (1/1) ... [2023-11-06 22:54:54,986 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:54:55,222 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_7d607194-5905-43c3-8ad5-464d107b0202/sv-benchmarks/c/weaver/mult-comm.wvr.c[1910,1923] [2023-11-06 22:54:55,227 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:54:55,237 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:54:55,258 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_7d607194-5905-43c3-8ad5-464d107b0202/sv-benchmarks/c/weaver/mult-comm.wvr.c[1910,1923] [2023-11-06 22:54:55,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:54:55,275 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:54:55,275 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:55 WrapperNode [2023-11-06 22:54:55,275 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:54:55,277 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:54:55,277 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:54:55,277 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:54:55,293 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:55" (1/1) ... [2023-11-06 22:54:55,300 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:55" (1/1) ... [2023-11-06 22:54:55,319 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2023-11-06 22:54:55,320 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:54:55,320 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:54:55,321 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:54:55,321 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:54:55,330 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:55" (1/1) ... [2023-11-06 22:54:55,331 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:55" (1/1) ... [2023-11-06 22:54:55,333 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:55" (1/1) ... [2023-11-06 22:54:55,333 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:55" (1/1) ... [2023-11-06 22:54:55,338 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:55" (1/1) ... [2023-11-06 22:54:55,341 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:55" (1/1) ... [2023-11-06 22:54:55,342 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:55" (1/1) ... [2023-11-06 22:54:55,343 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:55" (1/1) ... [2023-11-06 22:54:55,346 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:54:55,347 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:54:55,347 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:54:55,347 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:54:55,348 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:55" (1/1) ... [2023-11-06 22:54:55,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:54:55,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:55,381 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:54:55,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:54:55,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:54:55,426 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:54:55,426 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:54:55,426 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:54:55,426 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:54:55,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:54:55,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:54:55,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:54:55,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:54:55,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:54:55,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:54:55,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:54:55,429 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:54:55,556 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:54:55,558 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:54:55,757 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:54:55,767 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:54:55,769 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:54:55,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:55 BoogieIcfgContainer [2023-11-06 22:54:55,772 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:54:55,776 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:54:55,777 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:54:55,780 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:54:55,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:54:54" (1/3) ... [2023-11-06 22:54:55,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1261dc01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:55, skipping insertion in model container [2023-11-06 22:54:55,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:55" (2/3) ... [2023-11-06 22:54:55,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1261dc01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:55, skipping insertion in model container [2023-11-06 22:54:55,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:55" (3/3) ... [2023-11-06 22:54:55,785 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2023-11-06 22:54:55,794 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:54:55,808 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:54:55,808 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:54:55,808 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:54:55,872 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:54:55,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 174 flow [2023-11-06 22:54:56,009 INFO L124 PetriNetUnfolderBase]: 5/78 cut-off events. [2023-11-06 22:54:56,010 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:54:56,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 5/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2023-11-06 22:54:56,015 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 174 flow [2023-11-06 22:54:56,020 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 150 flow [2023-11-06 22:54:56,024 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:54:56,034 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 69 transitions, 150 flow [2023-11-06 22:54:56,037 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 69 transitions, 150 flow [2023-11-06 22:54:56,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 69 transitions, 150 flow [2023-11-06 22:54:56,079 INFO L124 PetriNetUnfolderBase]: 5/69 cut-off events. [2023-11-06 22:54:56,084 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:54:56,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 69 events. 5/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2023-11-06 22:54:56,087 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-11-06 22:54:58,348 INFO L134 LiptonReduction]: Checked pairs total: 527 [2023-11-06 22:54:58,348 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-11-06 22:54:58,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:54:58,371 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;@6e23889, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:54:58,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:54:58,377 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:54:58,377 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-06 22:54:58,377 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:54:58,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:58,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:58,379 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:54:58,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:58,384 INFO L85 PathProgramCache]: Analyzing trace with hash -382924776, now seen corresponding path program 1 times [2023-11-06 22:54:58,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:58,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996657429] [2023-11-06 22:54:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:58,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:58,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:58,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996657429] [2023-11-06 22:54:58,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996657429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:54:58,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:54:58,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:54:58,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088524262] [2023-11-06 22:54:58,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:54:58,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:54:59,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:59,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:54:59,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:54:59,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 141 [2023-11-06 22:54:59,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:59,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:59,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 141 [2023-11-06 22:54:59,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:59,181 INFO L124 PetriNetUnfolderBase]: 65/114 cut-off events. [2023-11-06 22:54:59,182 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-06 22:54:59,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 114 events. 65/114 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 322 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-11-06 22:54:59,187 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-11-06 22:54:59,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 117 flow [2023-11-06 22:54:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:54:59,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:54:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-11-06 22:54:59,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2023-11-06 22:54:59,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-11-06 22:54:59,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-11-06 22:54:59,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:59,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-11-06 22:54:59,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:59,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:59,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:59,231 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 234 transitions. [2023-11-06 22:54:59,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 117 flow [2023-11-06 22:54:59,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:54:59,237 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2023-11-06 22:54:59,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-11-06 22:54:59,244 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-11-06 22:54:59,245 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2023-11-06 22:54:59,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:59,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:59,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:59,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:54:59,247 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:54:59,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:59,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1598745543, now seen corresponding path program 1 times [2023-11-06 22:54:59,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:59,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165188886] [2023-11-06 22:54:59,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:59,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:59,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:59,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165188886] [2023-11-06 22:54:59,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165188886] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:59,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80335367] [2023-11-06 22:54:59,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:59,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:59,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:59,723 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:59,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:54:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:59,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:54:59,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:00,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:00,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80335367] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:00,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:00,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-11-06 22:55:00,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039031610] [2023-11-06 22:55:00,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:00,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:55:00,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:00,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:55:00,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:55:00,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2023-11-06 22:55:00,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 9 states, 9 states have (on average 64.0) internal successors, (576), 9 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:00,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:00,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2023-11-06 22:55:00,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:00,604 INFO L124 PetriNetUnfolderBase]: 75/137 cut-off events. [2023-11-06 22:55:00,604 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-06 22:55:00,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 137 events. 75/137 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 444 event pairs, 1 based on Foata normal form. 1/138 useless extension candidates. Maximal degree in co-relation 84. Up to 79 conditions per place. [2023-11-06 22:55:00,607 INFO L140 encePairwiseOnDemand]: 135/141 looper letters, 21 selfloop transitions, 5 changer transitions 15/42 dead transitions. [2023-11-06 22:55:00,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 42 transitions, 200 flow [2023-11-06 22:55:00,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:55:00,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:55:00,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 408 transitions. [2023-11-06 22:55:00,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48226950354609927 [2023-11-06 22:55:00,619 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 408 transitions. [2023-11-06 22:55:00,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 408 transitions. [2023-11-06 22:55:00,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:00,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 408 transitions. [2023-11-06 22:55:00,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:00,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:00,631 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:00,632 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 6 states and 408 transitions. [2023-11-06 22:55:00,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 42 transitions, 200 flow [2023-11-06 22:55:00,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 42 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:55:00,634 INFO L231 Difference]: Finished difference. Result has 26 places, 19 transitions, 78 flow [2023-11-06 22:55:00,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=19} [2023-11-06 22:55:00,635 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2023-11-06 22:55:00,635 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 19 transitions, 78 flow [2023-11-06 22:55:00,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 64.0) internal successors, (576), 9 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:00,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:00,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:00,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:00,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:00,844 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:55:00,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:00,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1405660746, now seen corresponding path program 1 times [2023-11-06 22:55:00,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:00,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246595101] [2023-11-06 22:55:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:00,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:01,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:01,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246595101] [2023-11-06 22:55:01,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246595101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:01,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028444972] [2023-11-06 22:55:01,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:01,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:01,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:01,068 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:01,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:55:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:01,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:55:01,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:01,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:01,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028444972] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:01,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:01,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-11-06 22:55:01,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331882315] [2023-11-06 22:55:01,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:01,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:55:01,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:01,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:55:01,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:55:01,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2023-11-06 22:55:01,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 78 flow. Second operand has 10 states, 10 states have (on average 63.8) internal successors, (638), 10 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:01,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:01,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2023-11-06 22:55:01,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:01,777 INFO L124 PetriNetUnfolderBase]: 48/93 cut-off events. [2023-11-06 22:55:01,778 INFO L125 PetriNetUnfolderBase]: For 39/45 co-relation queries the response was YES. [2023-11-06 22:55:01,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 93 events. 48/93 cut-off events. For 39/45 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 209 event pairs, 8 based on Foata normal form. 7/99 useless extension candidates. Maximal degree in co-relation 255. Up to 69 conditions per place. [2023-11-06 22:55:01,780 INFO L140 encePairwiseOnDemand]: 135/141 looper letters, 17 selfloop transitions, 6 changer transitions 9/34 dead transitions. [2023-11-06 22:55:01,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 189 flow [2023-11-06 22:55:01,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:55:01,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:55:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 398 transitions. [2023-11-06 22:55:01,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47044917257683216 [2023-11-06 22:55:01,782 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 398 transitions. [2023-11-06 22:55:01,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 398 transitions. [2023-11-06 22:55:01,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:01,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 398 transitions. [2023-11-06 22:55:01,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:01,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:01,788 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:01,788 INFO L175 Difference]: Start difference. First operand has 26 places, 19 transitions, 78 flow. Second operand 6 states and 398 transitions. [2023-11-06 22:55:01,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 189 flow [2023-11-06 22:55:01,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 167 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-06 22:55:01,791 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 94 flow [2023-11-06 22:55:01,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=94, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2023-11-06 22:55:01,792 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 9 predicate places. [2023-11-06 22:55:01,792 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 94 flow [2023-11-06 22:55:01,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 63.8) internal successors, (638), 10 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:01,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:01,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:01,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:55:01,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:01,998 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:55:01,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:01,999 INFO L85 PathProgramCache]: Analyzing trace with hash -247203472, now seen corresponding path program 2 times [2023-11-06 22:55:01,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:01,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258272354] [2023-11-06 22:55:02,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:02,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:02,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:02,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258272354] [2023-11-06 22:55:02,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258272354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:02,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960832607] [2023-11-06 22:55:02,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:55:02,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:02,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:02,459 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:02,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:55:02,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:55:02,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:02,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:55:02,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:02,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:03,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960832607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:03,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:03,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 13 [2023-11-06 22:55:03,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439981247] [2023-11-06 22:55:03,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:03,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:55:03,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:03,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:55:03,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:55:03,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:55:03,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 94 flow. Second operand has 15 states, 15 states have (on average 56.266666666666666) internal successors, (844), 15 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:03,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:03,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:55:03,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:03,894 INFO L124 PetriNetUnfolderBase]: 113/211 cut-off events. [2023-11-06 22:55:03,894 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-11-06 22:55:03,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 211 events. 113/211 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 676 event pairs, 5 based on Foata normal form. 3/214 useless extension candidates. Maximal degree in co-relation 601. Up to 92 conditions per place. [2023-11-06 22:55:03,898 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 44 selfloop transitions, 24 changer transitions 14/82 dead transitions. [2023-11-06 22:55:03,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 82 transitions, 448 flow [2023-11-06 22:55:03,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:55:03,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:55:03,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 840 transitions. [2023-11-06 22:55:03,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425531914893617 [2023-11-06 22:55:03,904 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 840 transitions. [2023-11-06 22:55:03,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 840 transitions. [2023-11-06 22:55:03,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:03,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 840 transitions. [2023-11-06 22:55:03,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 60.0) internal successors, (840), 14 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:03,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 141.0) internal successors, (2115), 15 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:03,914 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 141.0) internal successors, (2115), 15 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:03,914 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 94 flow. Second operand 14 states and 840 transitions. [2023-11-06 22:55:03,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 82 transitions, 448 flow [2023-11-06 22:55:03,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 82 transitions, 435 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-06 22:55:03,919 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 246 flow [2023-11-06 22:55:03,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=246, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2023-11-06 22:55:03,920 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2023-11-06 22:55:03,920 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 246 flow [2023-11-06 22:55:03,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 56.266666666666666) internal successors, (844), 15 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:03,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:03,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:03,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:04,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:04,129 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:55:04,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:04,129 INFO L85 PathProgramCache]: Analyzing trace with hash -711484720, now seen corresponding path program 3 times [2023-11-06 22:55:04,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:04,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075628349] [2023-11-06 22:55:04,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:04,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:04,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:04,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075628349] [2023-11-06 22:55:04,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075628349] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:04,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172322340] [2023-11-06 22:55:04,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:55:04,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:04,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:04,365 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:04,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:55:04,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:55:04,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:04,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:55:04,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:04,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:04,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172322340] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:04,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:04,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 12 [2023-11-06 22:55:04,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821708549] [2023-11-06 22:55:04,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:04,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:55:04,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:04,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:55:04,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:55:05,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:55:05,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 246 flow. Second operand has 14 states, 14 states have (on average 56.285714285714285) internal successors, (788), 14 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:05,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:05,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:55:05,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:05,453 INFO L124 PetriNetUnfolderBase]: 150/273 cut-off events. [2023-11-06 22:55:05,453 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-11-06 22:55:05,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 273 events. 150/273 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 923 event pairs, 17 based on Foata normal form. 2/275 useless extension candidates. Maximal degree in co-relation 1098. Up to 180 conditions per place. [2023-11-06 22:55:05,458 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 55 selfloop transitions, 26 changer transitions 7/88 dead transitions. [2023-11-06 22:55:05,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 88 transitions, 675 flow [2023-11-06 22:55:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:55:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:55:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 721 transitions. [2023-11-06 22:55:05,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42612293144208035 [2023-11-06 22:55:05,463 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 721 transitions. [2023-11-06 22:55:05,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 721 transitions. [2023-11-06 22:55:05,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:05,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 721 transitions. [2023-11-06 22:55:05,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 60.083333333333336) internal successors, (721), 12 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:05,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 141.0) internal successors, (1833), 13 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:05,471 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 141.0) internal successors, (1833), 13 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:05,472 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 246 flow. Second operand 12 states and 721 transitions. [2023-11-06 22:55:05,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 88 transitions, 675 flow [2023-11-06 22:55:05,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 88 transitions, 561 flow, removed 46 selfloop flow, removed 6 redundant places. [2023-11-06 22:55:05,481 INFO L231 Difference]: Finished difference. Result has 56 places, 57 transitions, 380 flow [2023-11-06 22:55:05,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=380, PETRI_PLACES=56, PETRI_TRANSITIONS=57} [2023-11-06 22:55:05,482 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-11-06 22:55:05,482 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 57 transitions, 380 flow [2023-11-06 22:55:05,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 56.285714285714285) internal successors, (788), 14 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:05,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:05,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:05,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:05,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:05,690 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:55:05,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:05,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1765634419, now seen corresponding path program 2 times [2023-11-06 22:55:05,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:05,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474583379] [2023-11-06 22:55:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:05,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:06,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:06,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474583379] [2023-11-06 22:55:06,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474583379] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:06,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555868751] [2023-11-06 22:55:06,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:55:06,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:06,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:06,092 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:06,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:55:06,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:55:06,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:06,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:55:06,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:06,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:06,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555868751] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:06,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:06,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-11-06 22:55:06,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48843491] [2023-11-06 22:55:06,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:06,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:55:06,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:06,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:55:06,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:55:06,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2023-11-06 22:55:06,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 57 transitions, 380 flow. Second operand has 10 states, 10 states have (on average 63.8) internal successors, (638), 10 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:06,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:06,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2023-11-06 22:55:06,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:06,815 INFO L124 PetriNetUnfolderBase]: 166/315 cut-off events. [2023-11-06 22:55:06,816 INFO L125 PetriNetUnfolderBase]: For 1011/1019 co-relation queries the response was YES. [2023-11-06 22:55:06,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1332 conditions, 315 events. 166/315 cut-off events. For 1011/1019 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1225 event pairs, 16 based on Foata normal form. 8/319 useless extension candidates. Maximal degree in co-relation 1263. Up to 231 conditions per place. [2023-11-06 22:55:06,820 INFO L140 encePairwiseOnDemand]: 135/141 looper letters, 57 selfloop transitions, 21 changer transitions 5/87 dead transitions. [2023-11-06 22:55:06,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 713 flow [2023-11-06 22:55:06,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:55:06,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:55:06,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 536 transitions. [2023-11-06 22:55:06,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475177304964539 [2023-11-06 22:55:06,824 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 536 transitions. [2023-11-06 22:55:06,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 536 transitions. [2023-11-06 22:55:06,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:06,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 536 transitions. [2023-11-06 22:55:06,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:06,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 141.0) internal successors, (1269), 9 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:06,830 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 141.0) internal successors, (1269), 9 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:06,831 INFO L175 Difference]: Start difference. First operand has 56 places, 57 transitions, 380 flow. Second operand 8 states and 536 transitions. [2023-11-06 22:55:06,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 713 flow [2023-11-06 22:55:06,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 87 transitions, 622 flow, removed 38 selfloop flow, removed 3 redundant places. [2023-11-06 22:55:06,842 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 440 flow [2023-11-06 22:55:06,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=440, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2023-11-06 22:55:06,843 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-11-06 22:55:06,844 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 440 flow [2023-11-06 22:55:06,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 63.8) internal successors, (638), 10 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:06,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:06,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:06,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:07,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:55:07,055 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:55:07,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:07,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1058195887, now seen corresponding path program 3 times [2023-11-06 22:55:07,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:07,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875122271] [2023-11-06 22:55:07,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:07,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:07,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:07,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875122271] [2023-11-06 22:55:07,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875122271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:07,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521694171] [2023-11-06 22:55:07,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:55:07,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:07,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:07,448 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:07,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:55:07,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:55:07,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:07,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:55:07,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:07,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:07,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521694171] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:07,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:07,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2023-11-06 22:55:07,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415684350] [2023-11-06 22:55:07,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:07,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:55:07,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:07,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:55:07,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:55:07,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2023-11-06 22:55:07,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 440 flow. Second operand has 11 states, 11 states have (on average 63.72727272727273) internal successors, (701), 11 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:07,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:07,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2023-11-06 22:55:07,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:08,440 INFO L124 PetriNetUnfolderBase]: 209/391 cut-off events. [2023-11-06 22:55:08,440 INFO L125 PetriNetUnfolderBase]: For 1287/1295 co-relation queries the response was YES. [2023-11-06 22:55:08,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1666 conditions, 391 events. 209/391 cut-off events. For 1287/1295 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1619 event pairs, 26 based on Foata normal form. 9/388 useless extension candidates. Maximal degree in co-relation 1588. Up to 261 conditions per place. [2023-11-06 22:55:08,446 INFO L140 encePairwiseOnDemand]: 135/141 looper letters, 68 selfloop transitions, 25 changer transitions 7/104 dead transitions. [2023-11-06 22:55:08,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 847 flow [2023-11-06 22:55:08,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:55:08,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:55:08,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 670 transitions. [2023-11-06 22:55:08,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475177304964539 [2023-11-06 22:55:08,450 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 670 transitions. [2023-11-06 22:55:08,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 670 transitions. [2023-11-06 22:55:08,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:08,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 670 transitions. [2023-11-06 22:55:08,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 67.0) internal successors, (670), 10 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 22:55:08,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 141.0) internal successors, (1551), 11 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:08,457 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 141.0) internal successors, (1551), 11 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:08,458 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 440 flow. Second operand 10 states and 670 transitions. [2023-11-06 22:55:08,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 847 flow [2023-11-06 22:55:08,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 104 transitions, 787 flow, removed 20 selfloop flow, removed 4 redundant places. [2023-11-06 22:55:08,468 INFO L231 Difference]: Finished difference. Result has 71 places, 77 transitions, 544 flow [2023-11-06 22:55:08,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=544, PETRI_PLACES=71, PETRI_TRANSITIONS=77} [2023-11-06 22:55:08,469 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 51 predicate places. [2023-11-06 22:55:08,469 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 77 transitions, 544 flow [2023-11-06 22:55:08,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 63.72727272727273) internal successors, (701), 11 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:08,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:08,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:08,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:08,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:55:08,676 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:55:08,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:08,677 INFO L85 PathProgramCache]: Analyzing trace with hash 262722165, now seen corresponding path program 1 times [2023-11-06 22:55:08,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:08,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449321779] [2023-11-06 22:55:08,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:08,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:09,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:09,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449321779] [2023-11-06 22:55:09,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449321779] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:09,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373799698] [2023-11-06 22:55:09,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:09,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:09,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:09,360 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:09,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:55:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:09,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:55:09,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:09,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:10,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373799698] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:10,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:10,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-11-06 22:55:10,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467884445] [2023-11-06 22:55:10,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:10,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:55:10,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:10,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:55:10,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:55:11,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:55:11,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 77 transitions, 544 flow. Second operand has 19 states, 19 states have (on average 55.8421052631579) internal successors, (1061), 19 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:11,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:11,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:55:11,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:13,385 INFO L124 PetriNetUnfolderBase]: 332/633 cut-off events. [2023-11-06 22:55:13,386 INFO L125 PetriNetUnfolderBase]: For 1989/1989 co-relation queries the response was YES. [2023-11-06 22:55:13,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2654 conditions, 633 events. 332/633 cut-off events. For 1989/1989 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3056 event pairs, 35 based on Foata normal form. 3/632 useless extension candidates. Maximal degree in co-relation 2530. Up to 318 conditions per place. [2023-11-06 22:55:13,393 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 101 selfloop transitions, 62 changer transitions 26/189 dead transitions. [2023-11-06 22:55:13,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 189 transitions, 1443 flow [2023-11-06 22:55:13,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:55:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:55:13,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1377 transitions. [2023-11-06 22:55:13,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246068455134135 [2023-11-06 22:55:13,400 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1377 transitions. [2023-11-06 22:55:13,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1377 transitions. [2023-11-06 22:55:13,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:13,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1377 transitions. [2023-11-06 22:55:13,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 59.869565217391305) internal successors, (1377), 23 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:13,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 141.0) internal successors, (3384), 24 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:13,416 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 141.0) internal successors, (3384), 24 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:13,416 INFO L175 Difference]: Start difference. First operand has 71 places, 77 transitions, 544 flow. Second operand 23 states and 1377 transitions. [2023-11-06 22:55:13,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 189 transitions, 1443 flow [2023-11-06 22:55:13,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 189 transitions, 1377 flow, removed 27 selfloop flow, removed 3 redundant places. [2023-11-06 22:55:13,434 INFO L231 Difference]: Finished difference. Result has 102 places, 103 transitions, 871 flow [2023-11-06 22:55:13,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=871, PETRI_PLACES=102, PETRI_TRANSITIONS=103} [2023-11-06 22:55:13,437 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 82 predicate places. [2023-11-06 22:55:13,437 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 103 transitions, 871 flow [2023-11-06 22:55:13,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.8421052631579) internal successors, (1061), 19 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:13,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:13,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:13,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:13,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:13,645 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:55:13,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:13,646 INFO L85 PathProgramCache]: Analyzing trace with hash 654949299, now seen corresponding path program 2 times [2023-11-06 22:55:13,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:13,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901660548] [2023-11-06 22:55:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:13,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:14,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:14,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901660548] [2023-11-06 22:55:14,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901660548] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:14,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697216347] [2023-11-06 22:55:14,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:55:14,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:14,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:14,472 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:14,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:55:14,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:55:14,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:14,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:55:14,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:14,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:15,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697216347] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:15,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:15,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-11-06 22:55:15,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627183409] [2023-11-06 22:55:15,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:15,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:55:15,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:15,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:55:15,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:55:16,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:55:16,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 103 transitions, 871 flow. Second operand has 19 states, 19 states have (on average 55.8421052631579) internal successors, (1061), 19 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:16,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:16,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:55:16,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:18,137 INFO L124 PetriNetUnfolderBase]: 373/719 cut-off events. [2023-11-06 22:55:18,137 INFO L125 PetriNetUnfolderBase]: For 5085/5085 co-relation queries the response was YES. [2023-11-06 22:55:18,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3826 conditions, 719 events. 373/719 cut-off events. For 5085/5085 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3674 event pairs, 33 based on Foata normal form. 3/722 useless extension candidates. Maximal degree in co-relation 3700. Up to 323 conditions per place. [2023-11-06 22:55:18,149 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 98 selfloop transitions, 88 changer transitions 22/208 dead transitions. [2023-11-06 22:55:18,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 208 transitions, 2078 flow [2023-11-06 22:55:18,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:55:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 22:55:18,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1493 transitions. [2023-11-06 22:55:18,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42354609929078013 [2023-11-06 22:55:18,157 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1493 transitions. [2023-11-06 22:55:18,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1493 transitions. [2023-11-06 22:55:18,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:18,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1493 transitions. [2023-11-06 22:55:18,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 59.72) internal successors, (1493), 25 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:18,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 141.0) internal successors, (3666), 26 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:18,175 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 141.0) internal successors, (3666), 26 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:18,175 INFO L175 Difference]: Start difference. First operand has 102 places, 103 transitions, 871 flow. Second operand 25 states and 1493 transitions. [2023-11-06 22:55:18,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 208 transitions, 2078 flow [2023-11-06 22:55:18,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 208 transitions, 1927 flow, removed 55 selfloop flow, removed 11 redundant places. [2023-11-06 22:55:18,214 INFO L231 Difference]: Finished difference. Result has 123 places, 131 transitions, 1401 flow [2023-11-06 22:55:18,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1401, PETRI_PLACES=123, PETRI_TRANSITIONS=131} [2023-11-06 22:55:18,215 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 103 predicate places. [2023-11-06 22:55:18,216 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 131 transitions, 1401 flow [2023-11-06 22:55:18,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.8421052631579) internal successors, (1061), 19 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:18,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:18,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:18,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:18,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:18,424 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:55:18,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:18,425 INFO L85 PathProgramCache]: Analyzing trace with hash 991914556, now seen corresponding path program 4 times [2023-11-06 22:55:18,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:18,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407571131] [2023-11-06 22:55:18,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:18,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:18,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:18,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407571131] [2023-11-06 22:55:18,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407571131] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:18,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195037794] [2023-11-06 22:55:18,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:55:18,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:18,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:18,781 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:18,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:55:18,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:55:18,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:18,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:55:18,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:19,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:21,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195037794] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:21,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:21,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 13 [2023-11-06 22:55:21,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988434872] [2023-11-06 22:55:21,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:21,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:55:21,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:21,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:55:21,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=150, Unknown=1, NotChecked=0, Total=210 [2023-11-06 22:55:23,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:55:26,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:55:28,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:55:30,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:55:32,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:55:32,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 141 [2023-11-06 22:55:32,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 131 transitions, 1401 flow. Second operand has 15 states, 15 states have (on average 55.6) internal successors, (834), 15 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:32,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:32,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 141 [2023-11-06 22:55:32,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:33,870 INFO L124 PetriNetUnfolderBase]: 373/707 cut-off events. [2023-11-06 22:55:33,870 INFO L125 PetriNetUnfolderBase]: For 6553/6553 co-relation queries the response was YES. [2023-11-06 22:55:33,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4153 conditions, 707 events. 373/707 cut-off events. For 6553/6553 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3501 event pairs, 67 based on Foata normal form. 3/708 useless extension candidates. Maximal degree in co-relation 4034. Up to 591 conditions per place. [2023-11-06 22:55:33,881 INFO L140 encePairwiseOnDemand]: 134/141 looper letters, 121 selfloop transitions, 22 changer transitions 23/166 dead transitions. [2023-11-06 22:55:33,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 166 transitions, 1915 flow [2023-11-06 22:55:33,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:55:33,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:55:33,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 707 transitions. [2023-11-06 22:55:33,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178486997635934 [2023-11-06 22:55:33,885 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 707 transitions. [2023-11-06 22:55:33,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 707 transitions. [2023-11-06 22:55:33,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:33,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 707 transitions. [2023-11-06 22:55:33,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.916666666666664) internal successors, (707), 12 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:33,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 141.0) internal successors, (1833), 13 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:33,892 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 141.0) internal successors, (1833), 13 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:33,892 INFO L175 Difference]: Start difference. First operand has 123 places, 131 transitions, 1401 flow. Second operand 12 states and 707 transitions. [2023-11-06 22:55:33,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 166 transitions, 1915 flow [2023-11-06 22:55:33,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 166 transitions, 1544 flow, removed 154 selfloop flow, removed 14 redundant places. [2023-11-06 22:55:33,942 INFO L231 Difference]: Finished difference. Result has 121 places, 128 transitions, 1106 flow [2023-11-06 22:55:33,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1106, PETRI_PLACES=121, PETRI_TRANSITIONS=128} [2023-11-06 22:55:33,943 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 101 predicate places. [2023-11-06 22:55:33,943 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 128 transitions, 1106 flow [2023-11-06 22:55:33,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 55.6) internal successors, (834), 15 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:33,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:33,944 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:33,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:34,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:55:34,151 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:55:34,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:34,151 INFO L85 PathProgramCache]: Analyzing trace with hash 746191942, now seen corresponding path program 3 times [2023-11-06 22:55:34,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:34,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608231893] [2023-11-06 22:55:34,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:34,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:36,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:36,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608231893] [2023-11-06 22:55:36,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608231893] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:36,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206844484] [2023-11-06 22:55:36,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:55:36,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:36,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:36,020 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:36,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:55:36,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:55:36,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:36,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:55:36,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:36,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:38,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206844484] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:38,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:38,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-11-06 22:55:38,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195051022] [2023-11-06 22:55:38,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:38,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:55:38,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:38,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:55:38,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:55:39,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:55:39,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 128 transitions, 1106 flow. Second operand has 22 states, 22 states have (on average 55.81818181818182) internal successors, (1228), 22 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:39,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:39,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:55:39,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:41,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:55:51,390 INFO L124 PetriNetUnfolderBase]: 453/856 cut-off events. [2023-11-06 22:55:51,390 INFO L125 PetriNetUnfolderBase]: For 6440/6440 co-relation queries the response was YES. [2023-11-06 22:55:51,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4613 conditions, 856 events. 453/856 cut-off events. For 6440/6440 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4385 event pairs, 44 based on Foata normal form. 4/850 useless extension candidates. Maximal degree in co-relation 4570. Up to 454 conditions per place. [2023-11-06 22:55:51,401 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 136 selfloop transitions, 97 changer transitions 21/254 dead transitions. [2023-11-06 22:55:51,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 254 transitions, 2449 flow [2023-11-06 22:55:51,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 22:55:51,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-06 22:55:51,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1959 transitions. [2023-11-06 22:55:51,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42101869761444227 [2023-11-06 22:55:51,420 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1959 transitions. [2023-11-06 22:55:51,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1959 transitions. [2023-11-06 22:55:51,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:51,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1959 transitions. [2023-11-06 22:55:51,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 59.36363636363637) internal successors, (1959), 33 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:51,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 141.0) internal successors, (4794), 34 states have internal predecessors, (4794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:51,444 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 141.0) internal successors, (4794), 34 states have internal predecessors, (4794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:51,445 INFO L175 Difference]: Start difference. First operand has 121 places, 128 transitions, 1106 flow. Second operand 33 states and 1959 transitions. [2023-11-06 22:55:51,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 254 transitions, 2449 flow [2023-11-06 22:55:51,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 254 transitions, 2375 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-11-06 22:55:51,489 INFO L231 Difference]: Finished difference. Result has 147 places, 158 transitions, 1773 flow [2023-11-06 22:55:51,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1773, PETRI_PLACES=147, PETRI_TRANSITIONS=158} [2023-11-06 22:55:51,491 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 127 predicate places. [2023-11-06 22:55:51,491 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 158 transitions, 1773 flow [2023-11-06 22:55:51,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 55.81818181818182) internal successors, (1228), 22 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:51,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:51,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:51,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:51,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:51,698 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:55:51,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:51,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1560242405, now seen corresponding path program 4 times [2023-11-06 22:55:51,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:51,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787000309] [2023-11-06 22:55:51,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:51,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:52,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:52,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787000309] [2023-11-06 22:55:52,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787000309] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:52,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285987059] [2023-11-06 22:55:52,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:55:52,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:52,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:52,307 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:52,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:55:52,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:55:52,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:52,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:55:52,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:52,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:54,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285987059] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:54,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:54,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 22:55:54,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886908957] [2023-11-06 22:55:54,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:54,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:55:54,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:54,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:55:54,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:55:54,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:55:54,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 158 transitions, 1773 flow. Second operand has 18 states, 18 states have (on average 56.0) internal successors, (1008), 18 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:54,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:54,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:55:54,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:56,312 INFO L124 PetriNetUnfolderBase]: 462/888 cut-off events. [2023-11-06 22:55:56,312 INFO L125 PetriNetUnfolderBase]: For 8793/8793 co-relation queries the response was YES. [2023-11-06 22:55:56,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5406 conditions, 888 events. 462/888 cut-off events. For 8793/8793 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4696 event pairs, 71 based on Foata normal form. 3/885 useless extension candidates. Maximal degree in co-relation 5358. Up to 764 conditions per place. [2023-11-06 22:55:56,324 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 165 selfloop transitions, 37 changer transitions 17/219 dead transitions. [2023-11-06 22:55:56,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 219 transitions, 2675 flow [2023-11-06 22:55:56,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:55:56,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:55:56,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 956 transitions. [2023-11-06 22:55:56,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4237588652482269 [2023-11-06 22:55:56,328 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 956 transitions. [2023-11-06 22:55:56,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 956 transitions. [2023-11-06 22:55:56,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:56,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 956 transitions. [2023-11-06 22:55:56,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 59.75) internal successors, (956), 16 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:56,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 141.0) internal successors, (2397), 17 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:56,336 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 141.0) internal successors, (2397), 17 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:56,336 INFO L175 Difference]: Start difference. First operand has 147 places, 158 transitions, 1773 flow. Second operand 16 states and 956 transitions. [2023-11-06 22:55:56,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 219 transitions, 2675 flow [2023-11-06 22:55:56,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 219 transitions, 2094 flow, removed 211 selfloop flow, removed 30 redundant places. [2023-11-06 22:55:56,390 INFO L231 Difference]: Finished difference. Result has 136 places, 172 transitions, 1567 flow [2023-11-06 22:55:56,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1567, PETRI_PLACES=136, PETRI_TRANSITIONS=172} [2023-11-06 22:55:56,391 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 116 predicate places. [2023-11-06 22:55:56,392 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 172 transitions, 1567 flow [2023-11-06 22:55:56,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.0) internal successors, (1008), 18 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:56,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:56,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:56,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:56,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:56,593 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:55:56,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:56,593 INFO L85 PathProgramCache]: Analyzing trace with hash 810084489, now seen corresponding path program 5 times [2023-11-06 22:55:56,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:56,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451655093] [2023-11-06 22:55:56,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:56,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:57,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:57,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451655093] [2023-11-06 22:55:57,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451655093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:57,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892418234] [2023-11-06 22:55:57,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:55:57,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:57,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:57,309 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:57,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:55:57,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:55:57,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:57,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:55:57,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:57,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:59,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892418234] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:59,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:59,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 22:55:59,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651006499] [2023-11-06 22:55:59,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:59,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:55:59,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:59,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:55:59,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:56:00,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:56:00,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 172 transitions, 1567 flow. Second operand has 18 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:00,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:00,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:56:00,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:02,062 INFO L124 PetriNetUnfolderBase]: 479/926 cut-off events. [2023-11-06 22:56:02,062 INFO L125 PetriNetUnfolderBase]: For 7122/7122 co-relation queries the response was YES. [2023-11-06 22:56:02,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5130 conditions, 926 events. 479/926 cut-off events. For 7122/7122 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4984 event pairs, 71 based on Foata normal form. 2/918 useless extension candidates. Maximal degree in co-relation 5088. Up to 760 conditions per place. [2023-11-06 22:56:02,071 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 156 selfloop transitions, 51 changer transitions 16/223 dead transitions. [2023-11-06 22:56:02,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 223 transitions, 2415 flow [2023-11-06 22:56:02,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:56:02,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:56:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1059 transitions. [2023-11-06 22:56:02,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41725768321513 [2023-11-06 22:56:02,074 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1059 transitions. [2023-11-06 22:56:02,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1059 transitions. [2023-11-06 22:56:02,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:02,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1059 transitions. [2023-11-06 22:56:02,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 58.833333333333336) internal successors, (1059), 18 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:02,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 141.0) internal successors, (2679), 19 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:02,083 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 141.0) internal successors, (2679), 19 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:02,083 INFO L175 Difference]: Start difference. First operand has 136 places, 172 transitions, 1567 flow. Second operand 18 states and 1059 transitions. [2023-11-06 22:56:02,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 223 transitions, 2415 flow [2023-11-06 22:56:02,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 223 transitions, 2222 flow, removed 89 selfloop flow, removed 5 redundant places. [2023-11-06 22:56:02,134 INFO L231 Difference]: Finished difference. Result has 153 places, 182 transitions, 1739 flow [2023-11-06 22:56:02,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1739, PETRI_PLACES=153, PETRI_TRANSITIONS=182} [2023-11-06 22:56:02,135 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 133 predicate places. [2023-11-06 22:56:02,135 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 182 transitions, 1739 flow [2023-11-06 22:56:02,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:02,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:02,136 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:02,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:02,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:02,342 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:56:02,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:02,342 INFO L85 PathProgramCache]: Analyzing trace with hash -878440774, now seen corresponding path program 4 times [2023-11-06 22:56:02,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:02,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583844501] [2023-11-06 22:56:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:02,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:02,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:02,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583844501] [2023-11-06 22:56:02,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583844501] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:02,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149223292] [2023-11-06 22:56:02,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:56:02,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:02,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:02,648 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:02,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:56:02,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:56:02,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:02,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:56:02,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:02,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:03,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149223292] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:03,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:03,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 14 [2023-11-06 22:56:03,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766748063] [2023-11-06 22:56:03,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:03,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:56:03,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:03,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:56:03,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:56:03,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 141 [2023-11-06 22:56:03,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 182 transitions, 1739 flow. Second operand has 16 states, 16 states have (on average 59.5) internal successors, (952), 16 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:03,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:03,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 141 [2023-11-06 22:56:03,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:04,386 INFO L124 PetriNetUnfolderBase]: 479/918 cut-off events. [2023-11-06 22:56:04,386 INFO L125 PetriNetUnfolderBase]: For 7827/7827 co-relation queries the response was YES. [2023-11-06 22:56:04,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5143 conditions, 918 events. 479/918 cut-off events. For 7827/7827 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4887 event pairs, 76 based on Foata normal form. 4/910 useless extension candidates. Maximal degree in co-relation 5095. Up to 803 conditions per place. [2023-11-06 22:56:04,397 INFO L140 encePairwiseOnDemand]: 134/141 looper letters, 172 selfloop transitions, 28 changer transitions 22/222 dead transitions. [2023-11-06 22:56:04,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 222 transitions, 2428 flow [2023-11-06 22:56:04,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:56:04,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:56:04,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 815 transitions. [2023-11-06 22:56:04,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44462629569012546 [2023-11-06 22:56:04,400 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 815 transitions. [2023-11-06 22:56:04,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 815 transitions. [2023-11-06 22:56:04,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:04,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 815 transitions. [2023-11-06 22:56:04,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 62.69230769230769) internal successors, (815), 13 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:04,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 141.0) internal successors, (1974), 14 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:04,407 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 141.0) internal successors, (1974), 14 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:04,408 INFO L175 Difference]: Start difference. First operand has 153 places, 182 transitions, 1739 flow. Second operand 13 states and 815 transitions. [2023-11-06 22:56:04,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 222 transitions, 2428 flow [2023-11-06 22:56:04,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 222 transitions, 2225 flow, removed 77 selfloop flow, removed 12 redundant places. [2023-11-06 22:56:04,468 INFO L231 Difference]: Finished difference. Result has 154 places, 179 transitions, 1605 flow [2023-11-06 22:56:04,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=1544, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1605, PETRI_PLACES=154, PETRI_TRANSITIONS=179} [2023-11-06 22:56:04,469 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 134 predicate places. [2023-11-06 22:56:04,469 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 179 transitions, 1605 flow [2023-11-06 22:56:04,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 59.5) internal successors, (952), 16 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:04,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:04,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:04,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:04,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:56:04,676 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:56:04,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:04,676 INFO L85 PathProgramCache]: Analyzing trace with hash -45222165, now seen corresponding path program 6 times [2023-11-06 22:56:04,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:04,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4017058] [2023-11-06 22:56:04,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:04,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:05,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:05,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4017058] [2023-11-06 22:56:05,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4017058] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:05,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793506105] [2023-11-06 22:56:05,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:56:05,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:05,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:05,332 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:05,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:56:05,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:56:05,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:05,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:56:05,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:05,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:07,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793506105] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:07,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:07,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 22:56:07,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545840150] [2023-11-06 22:56:07,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:07,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:56:07,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:07,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:56:07,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:56:07,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:56:07,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 179 transitions, 1605 flow. Second operand has 18 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:07,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:07,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:56:07,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:09,930 INFO L124 PetriNetUnfolderBase]: 520/992 cut-off events. [2023-11-06 22:56:09,931 INFO L125 PetriNetUnfolderBase]: For 9245/9245 co-relation queries the response was YES. [2023-11-06 22:56:09,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5732 conditions, 992 events. 520/992 cut-off events. For 9245/9245 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5379 event pairs, 78 based on Foata normal form. 2/980 useless extension candidates. Maximal degree in co-relation 5683. Up to 848 conditions per place. [2023-11-06 22:56:09,945 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 191 selfloop transitions, 49 changer transitions 8/248 dead transitions. [2023-11-06 22:56:09,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 248 transitions, 2798 flow [2023-11-06 22:56:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:56:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:56:09,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1238 transitions. [2023-11-06 22:56:09,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181019925700777 [2023-11-06 22:56:09,949 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1238 transitions. [2023-11-06 22:56:09,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1238 transitions. [2023-11-06 22:56:09,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:09,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1238 transitions. [2023-11-06 22:56:09,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 58.95238095238095) internal successors, (1238), 21 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:09,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 141.0) internal successors, (3102), 22 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:09,958 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 141.0) internal successors, (3102), 22 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:09,958 INFO L175 Difference]: Start difference. First operand has 154 places, 179 transitions, 1605 flow. Second operand 21 states and 1238 transitions. [2023-11-06 22:56:09,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 248 transitions, 2798 flow [2023-11-06 22:56:10,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 248 transitions, 2715 flow, removed 22 selfloop flow, removed 10 redundant places. [2023-11-06 22:56:10,013 INFO L231 Difference]: Finished difference. Result has 166 places, 200 transitions, 2118 flow [2023-11-06 22:56:10,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2118, PETRI_PLACES=166, PETRI_TRANSITIONS=200} [2023-11-06 22:56:10,014 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 146 predicate places. [2023-11-06 22:56:10,014 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 200 transitions, 2118 flow [2023-11-06 22:56:10,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:10,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:10,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:10,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:10,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:56:10,216 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:56:10,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:10,216 INFO L85 PathProgramCache]: Analyzing trace with hash 795928959, now seen corresponding path program 7 times [2023-11-06 22:56:10,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:10,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489581663] [2023-11-06 22:56:10,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:10,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:10,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:10,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489581663] [2023-11-06 22:56:10,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489581663] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:10,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330478081] [2023-11-06 22:56:10,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:56:10,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:10,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:10,880 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:10,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:56:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:10,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:56:10,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:11,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:13,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330478081] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:13,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:13,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 22:56:13,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157528030] [2023-11-06 22:56:13,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:13,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:56:13,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:13,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:56:13,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:56:13,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:56:13,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 200 transitions, 2118 flow. Second operand has 18 states, 18 states have (on average 56.0) internal successors, (1008), 18 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:13,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:13,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:56:13,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:15,606 INFO L124 PetriNetUnfolderBase]: 521/997 cut-off events. [2023-11-06 22:56:15,607 INFO L125 PetriNetUnfolderBase]: For 11282/11282 co-relation queries the response was YES. [2023-11-06 22:56:15,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5991 conditions, 997 events. 521/997 cut-off events. For 11282/11282 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5409 event pairs, 79 based on Foata normal form. 2/985 useless extension candidates. Maximal degree in co-relation 5939. Up to 834 conditions per place. [2023-11-06 22:56:15,622 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 177 selfloop transitions, 55 changer transitions 10/242 dead transitions. [2023-11-06 22:56:15,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 242 transitions, 2815 flow [2023-11-06 22:56:15,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:56:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:56:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1009 transitions. [2023-11-06 22:56:15,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42094284522319564 [2023-11-06 22:56:15,626 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1009 transitions. [2023-11-06 22:56:15,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1009 transitions. [2023-11-06 22:56:15,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:15,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1009 transitions. [2023-11-06 22:56:15,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 59.35294117647059) internal successors, (1009), 17 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:15,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 141.0) internal successors, (2538), 18 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:15,635 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 141.0) internal successors, (2538), 18 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:15,635 INFO L175 Difference]: Start difference. First operand has 166 places, 200 transitions, 2118 flow. Second operand 17 states and 1009 transitions. [2023-11-06 22:56:15,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 242 transitions, 2815 flow [2023-11-06 22:56:15,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 242 transitions, 2490 flow, removed 149 selfloop flow, removed 8 redundant places. [2023-11-06 22:56:15,707 INFO L231 Difference]: Finished difference. Result has 176 places, 203 transitions, 2012 flow [2023-11-06 22:56:15,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=1793, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2012, PETRI_PLACES=176, PETRI_TRANSITIONS=203} [2023-11-06 22:56:15,708 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 156 predicate places. [2023-11-06 22:56:15,708 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 203 transitions, 2012 flow [2023-11-06 22:56:15,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.0) internal successors, (1008), 18 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:15,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:15,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:15,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:15,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:15,915 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:56:15,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:15,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1673716187, now seen corresponding path program 8 times [2023-11-06 22:56:15,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:15,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474642120] [2023-11-06 22:56:15,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:15,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:16,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:16,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474642120] [2023-11-06 22:56:16,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474642120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:16,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691419803] [2023-11-06 22:56:16,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:56:16,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:16,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:16,535 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:16,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:56:16,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:56:16,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:16,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:56:16,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:16,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:18,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691419803] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:18,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:18,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 22:56:18,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008319347] [2023-11-06 22:56:18,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:18,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:56:18,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:18,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:56:18,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:56:19,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:56:19,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 203 transitions, 2012 flow. Second operand has 18 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:19,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:19,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:56:19,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:20,369 INFO L124 PetriNetUnfolderBase]: 517/1004 cut-off events. [2023-11-06 22:56:20,369 INFO L125 PetriNetUnfolderBase]: For 10680/10680 co-relation queries the response was YES. [2023-11-06 22:56:20,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5890 conditions, 1004 events. 517/1004 cut-off events. For 10680/10680 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5547 event pairs, 86 based on Foata normal form. 3/989 useless extension candidates. Maximal degree in co-relation 5835. Up to 923 conditions per place. [2023-11-06 22:56:20,383 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 192 selfloop transitions, 35 changer transitions 7/234 dead transitions. [2023-11-06 22:56:20,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 234 transitions, 2684 flow [2023-11-06 22:56:20,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:56:20,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:56:20,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 991 transitions. [2023-11-06 22:56:20,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134334584897789 [2023-11-06 22:56:20,386 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 991 transitions. [2023-11-06 22:56:20,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 991 transitions. [2023-11-06 22:56:20,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:20,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 991 transitions. [2023-11-06 22:56:20,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 58.294117647058826) internal successors, (991), 17 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:20,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 141.0) internal successors, (2538), 18 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:20,394 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 141.0) internal successors, (2538), 18 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:20,394 INFO L175 Difference]: Start difference. First operand has 176 places, 203 transitions, 2012 flow. Second operand 17 states and 991 transitions. [2023-11-06 22:56:20,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 234 transitions, 2684 flow [2023-11-06 22:56:20,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 234 transitions, 2495 flow, removed 64 selfloop flow, removed 14 redundant places. [2023-11-06 22:56:20,463 INFO L231 Difference]: Finished difference. Result has 182 places, 207 transitions, 2001 flow [2023-11-06 22:56:20,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=1827, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2001, PETRI_PLACES=182, PETRI_TRANSITIONS=207} [2023-11-06 22:56:20,464 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 162 predicate places. [2023-11-06 22:56:20,464 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 207 transitions, 2001 flow [2023-11-06 22:56:20,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:20,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:20,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:20,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-06 22:56:20,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:56:20,671 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:56:20,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:20,671 INFO L85 PathProgramCache]: Analyzing trace with hash -59377695, now seen corresponding path program 9 times [2023-11-06 22:56:20,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:20,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129017724] [2023-11-06 22:56:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:20,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:21,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:21,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129017724] [2023-11-06 22:56:21,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129017724] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:21,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748084507] [2023-11-06 22:56:21,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:56:21,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:21,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:21,364 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:21,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:56:21,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:56:21,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:21,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:56:21,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:21,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:23,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748084507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:23,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:23,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 22:56:23,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92003895] [2023-11-06 22:56:23,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:23,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:56:23,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:23,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:56:23,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:56:24,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:56:24,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 207 transitions, 2001 flow. Second operand has 18 states, 18 states have (on average 56.0) internal successors, (1008), 18 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:24,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:24,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:56:24,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:25,567 INFO L124 PetriNetUnfolderBase]: 514/984 cut-off events. [2023-11-06 22:56:25,567 INFO L125 PetriNetUnfolderBase]: For 9808/9808 co-relation queries the response was YES. [2023-11-06 22:56:25,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5699 conditions, 984 events. 514/984 cut-off events. For 9808/9808 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5333 event pairs, 78 based on Foata normal form. 2/968 useless extension candidates. Maximal degree in co-relation 5641. Up to 854 conditions per place. [2023-11-06 22:56:25,588 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 183 selfloop transitions, 51 changer transitions 10/244 dead transitions. [2023-11-06 22:56:25,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 244 transitions, 2658 flow [2023-11-06 22:56:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:56:25,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:56:25,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1113 transitions. [2023-11-06 22:56:25,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4154535274356103 [2023-11-06 22:56:25,597 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1113 transitions. [2023-11-06 22:56:25,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1113 transitions. [2023-11-06 22:56:25,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:25,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1113 transitions. [2023-11-06 22:56:25,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 58.578947368421055) internal successors, (1113), 19 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:25,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 141.0) internal successors, (2820), 20 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:25,610 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 141.0) internal successors, (2820), 20 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:25,610 INFO L175 Difference]: Start difference. First operand has 182 places, 207 transitions, 2001 flow. Second operand 19 states and 1113 transitions. [2023-11-06 22:56:25,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 244 transitions, 2658 flow [2023-11-06 22:56:25,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 244 transitions, 2554 flow, removed 34 selfloop flow, removed 11 redundant places. [2023-11-06 22:56:25,667 INFO L231 Difference]: Finished difference. Result has 192 places, 209 transitions, 2104 flow [2023-11-06 22:56:25,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=1901, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2104, PETRI_PLACES=192, PETRI_TRANSITIONS=209} [2023-11-06 22:56:25,668 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 172 predicate places. [2023-11-06 22:56:25,668 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 209 transitions, 2104 flow [2023-11-06 22:56:25,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.0) internal successors, (1008), 18 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:25,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:25,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:25,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-06 22:56:25,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:56:25,874 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:56:25,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:25,875 INFO L85 PathProgramCache]: Analyzing trace with hash -2070303722, now seen corresponding path program 5 times [2023-11-06 22:56:25,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:25,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47417698] [2023-11-06 22:56:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:25,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:26,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:26,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47417698] [2023-11-06 22:56:26,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47417698] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:26,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832291810] [2023-11-06 22:56:26,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:56:26,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:26,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:26,261 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:26,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:56:26,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:56:26,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:26,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:56:26,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:26,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:26,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:27,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832291810] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:27,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:27,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 13 [2023-11-06 22:56:27,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398083490] [2023-11-06 22:56:27,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:27,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:56:27,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:27,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:56:27,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:56:29,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:56:29,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 141 [2023-11-06 22:56:29,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 209 transitions, 2104 flow. Second operand has 15 states, 15 states have (on average 59.6) internal successors, (894), 15 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:29,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:29,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 141 [2023-11-06 22:56:29,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:32,391 INFO L124 PetriNetUnfolderBase]: 526/1006 cut-off events. [2023-11-06 22:56:32,391 INFO L125 PetriNetUnfolderBase]: For 11825/11825 co-relation queries the response was YES. [2023-11-06 22:56:32,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6138 conditions, 1006 events. 526/1006 cut-off events. For 11825/11825 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5462 event pairs, 81 based on Foata normal form. 2/994 useless extension candidates. Maximal degree in co-relation 6077. Up to 890 conditions per place. [2023-11-06 22:56:32,406 INFO L140 encePairwiseOnDemand]: 134/141 looper letters, 204 selfloop transitions, 29 changer transitions 7/240 dead transitions. [2023-11-06 22:56:32,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 240 transitions, 2867 flow [2023-11-06 22:56:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:56:32,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:56:32,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 633 transitions. [2023-11-06 22:56:32,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44893617021276594 [2023-11-06 22:56:32,409 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 633 transitions. [2023-11-06 22:56:32,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 633 transitions. [2023-11-06 22:56:32,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:32,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 633 transitions. [2023-11-06 22:56:32,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 63.3) internal successors, (633), 10 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:32,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 141.0) internal successors, (1551), 11 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:32,421 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 141.0) internal successors, (1551), 11 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:32,421 INFO L175 Difference]: Start difference. First operand has 192 places, 209 transitions, 2104 flow. Second operand 10 states and 633 transitions. [2023-11-06 22:56:32,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 240 transitions, 2867 flow [2023-11-06 22:56:32,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 240 transitions, 2705 flow, removed 39 selfloop flow, removed 17 redundant places. [2023-11-06 22:56:32,493 INFO L231 Difference]: Finished difference. Result has 185 places, 212 transitions, 2115 flow [2023-11-06 22:56:32,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=1954, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2115, PETRI_PLACES=185, PETRI_TRANSITIONS=212} [2023-11-06 22:56:32,493 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 165 predicate places. [2023-11-06 22:56:32,493 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 212 transitions, 2115 flow [2023-11-06 22:56:32,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 59.6) internal successors, (894), 15 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:32,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:32,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:32,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:32,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:32,695 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:56:32,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:32,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1926277613, now seen corresponding path program 10 times [2023-11-06 22:56:32,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:32,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704624038] [2023-11-06 22:56:32,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:32,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:33,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:33,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704624038] [2023-11-06 22:56:33,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704624038] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:33,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733751933] [2023-11-06 22:56:33,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:56:33,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:33,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:33,263 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:33,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:56:33,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:56:33,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:33,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:56:33,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:33,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:34,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733751933] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:34,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:34,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-11-06 22:56:34,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748896826] [2023-11-06 22:56:34,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:34,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:56:34,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:34,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:56:34,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:56:35,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:56:38,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:56:38,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 141 [2023-11-06 22:56:38,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 212 transitions, 2115 flow. Second operand has 19 states, 19 states have (on average 54.8421052631579) internal successors, (1042), 19 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:38,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:38,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 141 [2023-11-06 22:56:38,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:40,592 INFO L124 PetriNetUnfolderBase]: 585/1132 cut-off events. [2023-11-06 22:56:40,592 INFO L125 PetriNetUnfolderBase]: For 14161/14161 co-relation queries the response was YES. [2023-11-06 22:56:40,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6970 conditions, 1132 events. 585/1132 cut-off events. For 14161/14161 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6449 event pairs, 73 based on Foata normal form. 3/1123 useless extension candidates. Maximal degree in co-relation 6908. Up to 912 conditions per place. [2023-11-06 22:56:40,602 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 207 selfloop transitions, 64 changer transitions 32/303 dead transitions. [2023-11-06 22:56:40,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 303 transitions, 3544 flow [2023-11-06 22:56:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:56:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:56:40,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1392 transitions. [2023-11-06 22:56:40,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41134751773049644 [2023-11-06 22:56:40,606 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1392 transitions. [2023-11-06 22:56:40,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1392 transitions. [2023-11-06 22:56:40,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:40,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1392 transitions. [2023-11-06 22:56:40,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 58.0) internal successors, (1392), 24 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:40,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 141.0) internal successors, (3525), 25 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:40,615 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 141.0) internal successors, (3525), 25 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:40,615 INFO L175 Difference]: Start difference. First operand has 185 places, 212 transitions, 2115 flow. Second operand 24 states and 1392 transitions. [2023-11-06 22:56:40,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 303 transitions, 3544 flow [2023-11-06 22:56:40,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 303 transitions, 3461 flow, removed 17 selfloop flow, removed 7 redundant places. [2023-11-06 22:56:40,722 INFO L231 Difference]: Finished difference. Result has 211 places, 237 transitions, 2616 flow [2023-11-06 22:56:40,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=2032, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2616, PETRI_PLACES=211, PETRI_TRANSITIONS=237} [2023-11-06 22:56:40,722 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 191 predicate places. [2023-11-06 22:56:40,723 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 237 transitions, 2616 flow [2023-11-06 22:56:40,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.8421052631579) internal successors, (1042), 19 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:40,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:40,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:40,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:40,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:40,925 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:56:40,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:40,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1337159893, now seen corresponding path program 11 times [2023-11-06 22:56:40,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:40,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291427730] [2023-11-06 22:56:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:40,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:41,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:41,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291427730] [2023-11-06 22:56:41,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291427730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:41,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462505817] [2023-11-06 22:56:41,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:56:41,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:41,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:41,594 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:41,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:56:41,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:56:41,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:41,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:56:41,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:41,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:43,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462505817] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:43,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:43,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 22:56:43,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626070998] [2023-11-06 22:56:43,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:43,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:56:43,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:43,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:56:43,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:56:44,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:56:44,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 237 transitions, 2616 flow. Second operand has 18 states, 18 states have (on average 55.94444444444444) internal successors, (1007), 18 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:44,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:44,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:56:44,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:46,106 INFO L124 PetriNetUnfolderBase]: 601/1154 cut-off events. [2023-11-06 22:56:46,106 INFO L125 PetriNetUnfolderBase]: For 18381/18381 co-relation queries the response was YES. [2023-11-06 22:56:46,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7663 conditions, 1154 events. 601/1154 cut-off events. For 18381/18381 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6539 event pairs, 76 based on Foata normal form. 2/1144 useless extension candidates. Maximal degree in co-relation 7591. Up to 988 conditions per place. [2023-11-06 22:56:46,117 INFO L140 encePairwiseOnDemand]: 132/141 looper letters, 240 selfloop transitions, 51 changer transitions 10/301 dead transitions. [2023-11-06 22:56:46,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 301 transitions, 3869 flow [2023-11-06 22:56:46,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:56:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:56:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1296 transitions. [2023-11-06 22:56:46,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41779497098646035 [2023-11-06 22:56:46,121 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1296 transitions. [2023-11-06 22:56:46,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1296 transitions. [2023-11-06 22:56:46,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:46,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1296 transitions. [2023-11-06 22:56:46,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 58.90909090909091) internal successors, (1296), 22 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:46,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 141.0) internal successors, (3243), 23 states have internal predecessors, (3243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:46,129 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 141.0) internal successors, (3243), 23 states have internal predecessors, (3243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:46,129 INFO L175 Difference]: Start difference. First operand has 211 places, 237 transitions, 2616 flow. Second operand 22 states and 1296 transitions. [2023-11-06 22:56:46,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 301 transitions, 3869 flow [2023-11-06 22:56:46,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 301 transitions, 3494 flow, removed 167 selfloop flow, removed 11 redundant places. [2023-11-06 22:56:46,245 INFO L231 Difference]: Finished difference. Result has 223 places, 251 transitions, 2767 flow [2023-11-06 22:56:46,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2767, PETRI_PLACES=223, PETRI_TRANSITIONS=251} [2023-11-06 22:56:46,246 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 203 predicate places. [2023-11-06 22:56:46,246 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 251 transitions, 2767 flow [2023-11-06 22:56:46,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.94444444444444) internal successors, (1007), 18 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:46,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:46,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:46,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:46,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 22:56:46,447 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:56:46,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:46,447 INFO L85 PathProgramCache]: Analyzing trace with hash -2080769755, now seen corresponding path program 12 times [2023-11-06 22:56:46,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:46,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76782659] [2023-11-06 22:56:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:46,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:47,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:47,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76782659] [2023-11-06 22:56:47,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76782659] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:47,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121170967] [2023-11-06 22:56:47,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:56:47,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:47,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:47,017 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:47,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:56:47,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:56:47,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:47,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:56:47,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:47,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:48,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121170967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:48,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:48,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 22:56:48,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208726383] [2023-11-06 22:56:48,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:48,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:56:48,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:48,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:56:48,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:56:49,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:56:49,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 251 transitions, 2767 flow. Second operand has 18 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:49,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:49,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:56:49,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:50,600 INFO L124 PetriNetUnfolderBase]: 605/1166 cut-off events. [2023-11-06 22:56:50,600 INFO L125 PetriNetUnfolderBase]: For 19553/19553 co-relation queries the response was YES. [2023-11-06 22:56:50,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7760 conditions, 1166 events. 605/1166 cut-off events. For 19553/19553 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 6666 event pairs, 88 based on Foata normal form. 2/1152 useless extension candidates. Maximal degree in co-relation 7686. Up to 1092 conditions per place. [2023-11-06 22:56:50,612 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 239 selfloop transitions, 36 changer transitions 7/282 dead transitions. [2023-11-06 22:56:50,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 282 transitions, 3762 flow [2023-11-06 22:56:50,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:56:50,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:56:50,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 876 transitions. [2023-11-06 22:56:50,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41418439716312055 [2023-11-06 22:56:50,615 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 876 transitions. [2023-11-06 22:56:50,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 876 transitions. [2023-11-06 22:56:50,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:50,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 876 transitions. [2023-11-06 22:56:50,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 58.4) internal successors, (876), 15 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:50,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 141.0) internal successors, (2256), 16 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:50,620 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 141.0) internal successors, (2256), 16 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:50,621 INFO L175 Difference]: Start difference. First operand has 223 places, 251 transitions, 2767 flow. Second operand 15 states and 876 transitions. [2023-11-06 22:56:50,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 282 transitions, 3762 flow [2023-11-06 22:56:50,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 282 transitions, 3414 flow, removed 141 selfloop flow, removed 17 redundant places. [2023-11-06 22:56:50,760 INFO L231 Difference]: Finished difference. Result has 222 places, 259 transitions, 2808 flow [2023-11-06 22:56:50,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=2419, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2808, PETRI_PLACES=222, PETRI_TRANSITIONS=259} [2023-11-06 22:56:50,761 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 202 predicate places. [2023-11-06 22:56:50,761 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 259 transitions, 2808 flow [2023-11-06 22:56:50,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:50,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:50,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:50,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:50,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:56:50,967 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:56:50,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:50,968 INFO L85 PathProgramCache]: Analyzing trace with hash 481853239, now seen corresponding path program 13 times [2023-11-06 22:56:50,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:50,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001332336] [2023-11-06 22:56:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:50,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:51,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:51,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001332336] [2023-11-06 22:56:51,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001332336] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:51,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802568353] [2023-11-06 22:56:51,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:56:51,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:51,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:51,646 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:51,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:56:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:51,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:56:51,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:51,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:53,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802568353] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:53,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:53,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 22:56:53,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596167198] [2023-11-06 22:56:53,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:53,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:56:53,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:53,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:56:53,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:56:54,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:56:54,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 259 transitions, 2808 flow. Second operand has 18 states, 18 states have (on average 55.94444444444444) internal successors, (1007), 18 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:54,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:54,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:56:54,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:55,886 INFO L124 PetriNetUnfolderBase]: 635/1220 cut-off events. [2023-11-06 22:56:55,886 INFO L125 PetriNetUnfolderBase]: For 22235/22235 co-relation queries the response was YES. [2023-11-06 22:56:55,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8282 conditions, 1220 events. 635/1220 cut-off events. For 22235/22235 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7026 event pairs, 82 based on Foata normal form. 2/1202 useless extension candidates. Maximal degree in co-relation 8209. Up to 1063 conditions per place. [2023-11-06 22:56:55,899 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 236 selfloop transitions, 56 changer transitions 11/303 dead transitions. [2023-11-06 22:56:55,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 303 transitions, 4028 flow [2023-11-06 22:56:55,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:56:55,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:56:55,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 941 transitions. [2023-11-06 22:56:55,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171099290780142 [2023-11-06 22:56:55,902 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 941 transitions. [2023-11-06 22:56:55,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 941 transitions. [2023-11-06 22:56:55,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:55,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 941 transitions. [2023-11-06 22:56:55,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.8125) internal successors, (941), 16 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:55,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 141.0) internal successors, (2397), 17 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:55,908 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 141.0) internal successors, (2397), 17 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:55,909 INFO L175 Difference]: Start difference. First operand has 222 places, 259 transitions, 2808 flow. Second operand 16 states and 941 transitions. [2023-11-06 22:56:55,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 303 transitions, 4028 flow [2023-11-06 22:56:56,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 303 transitions, 3705 flow, removed 135 selfloop flow, removed 11 redundant places. [2023-11-06 22:56:56,063 INFO L231 Difference]: Finished difference. Result has 230 places, 270 transitions, 3020 flow [2023-11-06 22:56:56,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=2521, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3020, PETRI_PLACES=230, PETRI_TRANSITIONS=270} [2023-11-06 22:56:56,064 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 210 predicate places. [2023-11-06 22:56:56,064 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 270 transitions, 3020 flow [2023-11-06 22:56:56,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.94444444444444) internal successors, (1007), 18 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:56,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:56,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:56,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:56,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:56:56,271 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:56:56,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:56,271 INFO L85 PathProgramCache]: Analyzing trace with hash 495259189, now seen corresponding path program 14 times [2023-11-06 22:56:56,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:56,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272564994] [2023-11-06 22:56:56,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:56,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:56,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:56,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272564994] [2023-11-06 22:56:56,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272564994] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:56,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806944590] [2023-11-06 22:56:56,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:56:56,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:56,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:56,884 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:56,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:56:56,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:56:56,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:56,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:56:56,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:57,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:58,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806944590] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:58,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:58,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 22:56:58,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685035265] [2023-11-06 22:56:58,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:58,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:56:58,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:58,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:56:58,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:56:59,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:56:59,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 270 transitions, 3020 flow. Second operand has 18 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:59,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:59,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:56:59,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:00,983 INFO L124 PetriNetUnfolderBase]: 627/1209 cut-off events. [2023-11-06 22:57:00,983 INFO L125 PetriNetUnfolderBase]: For 22512/22512 co-relation queries the response was YES. [2023-11-06 22:57:00,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8193 conditions, 1209 events. 627/1209 cut-off events. For 22512/22512 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 6951 event pairs, 82 based on Foata normal form. 2/1193 useless extension candidates. Maximal degree in co-relation 8117. Up to 1065 conditions per place. [2023-11-06 22:57:00,996 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 239 selfloop transitions, 57 changer transitions 8/304 dead transitions. [2023-11-06 22:57:00,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 304 transitions, 3963 flow [2023-11-06 22:57:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:57:00,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:57:00,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1001 transitions. [2023-11-06 22:57:00,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41760534000834376 [2023-11-06 22:57:00,999 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1001 transitions. [2023-11-06 22:57:00,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1001 transitions. [2023-11-06 22:57:00,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:00,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1001 transitions. [2023-11-06 22:57:01,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 58.88235294117647) internal successors, (1001), 17 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:01,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 141.0) internal successors, (2538), 18 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:01,005 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 141.0) internal successors, (2538), 18 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:01,005 INFO L175 Difference]: Start difference. First operand has 230 places, 270 transitions, 3020 flow. Second operand 17 states and 1001 transitions. [2023-11-06 22:57:01,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 304 transitions, 3963 flow [2023-11-06 22:57:01,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 304 transitions, 3606 flow, removed 154 selfloop flow, removed 10 redundant places. [2023-11-06 22:57:01,122 INFO L231 Difference]: Finished difference. Result has 237 places, 273 transitions, 3006 flow [2023-11-06 22:57:01,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=2747, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3006, PETRI_PLACES=237, PETRI_TRANSITIONS=273} [2023-11-06 22:57:01,123 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 217 predicate places. [2023-11-06 22:57:01,124 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 273 transitions, 3006 flow [2023-11-06 22:57:01,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:01,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:01,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:01,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:01,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:57:01,325 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:57:01,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:01,325 INFO L85 PathProgramCache]: Analyzing trace with hash -816191563, now seen corresponding path program 15 times [2023-11-06 22:57:01,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:01,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813329615] [2023-11-06 22:57:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:01,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:02,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:02,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813329615] [2023-11-06 22:57:02,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813329615] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:02,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390190425] [2023-11-06 22:57:02,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:57:02,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:02,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:02,058 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:02,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:57:02,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:57:02,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:57:02,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:57:02,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:02,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:03,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390190425] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:03,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:03,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-11-06 22:57:03,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939565755] [2023-11-06 22:57:03,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:03,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:57:03,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:03,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:57:03,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:57:03,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:57:03,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 273 transitions, 3006 flow. Second operand has 19 states, 19 states have (on average 55.89473684210526) internal successors, (1062), 19 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:03,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:03,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:57:03,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:07,372 INFO L124 PetriNetUnfolderBase]: 678/1304 cut-off events. [2023-11-06 22:57:07,372 INFO L125 PetriNetUnfolderBase]: For 31196/31196 co-relation queries the response was YES. [2023-11-06 22:57:07,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9444 conditions, 1304 events. 678/1304 cut-off events. For 31196/31196 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 7649 event pairs, 76 based on Foata normal form. 3/1287 useless extension candidates. Maximal degree in co-relation 9367. Up to 1038 conditions per place. [2023-11-06 22:57:07,384 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 242 selfloop transitions, 92 changer transitions 16/350 dead transitions. [2023-11-06 22:57:07,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 350 transitions, 4824 flow [2023-11-06 22:57:07,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:57:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:57:07,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1420 transitions. [2023-11-06 22:57:07,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41962174940898345 [2023-11-06 22:57:07,390 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1420 transitions. [2023-11-06 22:57:07,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1420 transitions. [2023-11-06 22:57:07,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:07,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1420 transitions. [2023-11-06 22:57:07,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 59.166666666666664) internal successors, (1420), 24 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:07,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 141.0) internal successors, (3525), 25 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:07,399 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 141.0) internal successors, (3525), 25 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:07,399 INFO L175 Difference]: Start difference. First operand has 237 places, 273 transitions, 3006 flow. Second operand 24 states and 1420 transitions. [2023-11-06 22:57:07,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 350 transitions, 4824 flow [2023-11-06 22:57:07,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 350 transitions, 4566 flow, removed 97 selfloop flow, removed 14 redundant places. [2023-11-06 22:57:07,589 INFO L231 Difference]: Finished difference. Result has 252 places, 294 transitions, 3724 flow [2023-11-06 22:57:07,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=2762, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3724, PETRI_PLACES=252, PETRI_TRANSITIONS=294} [2023-11-06 22:57:07,591 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 232 predicate places. [2023-11-06 22:57:07,591 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 294 transitions, 3724 flow [2023-11-06 22:57:07,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.89473684210526) internal successors, (1062), 19 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:07,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:07,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:07,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:07,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 22:57:07,798 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:57:07,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:07,798 INFO L85 PathProgramCache]: Analyzing trace with hash 478880009, now seen corresponding path program 16 times [2023-11-06 22:57:07,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:07,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129801566] [2023-11-06 22:57:07,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:07,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:08,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:08,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129801566] [2023-11-06 22:57:08,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129801566] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:08,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006107944] [2023-11-06 22:57:08,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:57:08,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:08,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:08,336 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:08,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:57:08,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:57:08,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:57:08,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:57:08,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:08,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:10,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006107944] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:10,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:10,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-06 22:57:10,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104679392] [2023-11-06 22:57:10,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:10,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:57:10,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:10,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:57:10,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:57:10,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:57:10,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 294 transitions, 3724 flow. Second operand has 18 states, 18 states have (on average 55.94444444444444) internal successors, (1007), 18 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:10,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:10,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:57:10,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:11,837 INFO L124 PetriNetUnfolderBase]: 687/1325 cut-off events. [2023-11-06 22:57:11,837 INFO L125 PetriNetUnfolderBase]: For 32958/32958 co-relation queries the response was YES. [2023-11-06 22:57:11,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9939 conditions, 1325 events. 687/1325 cut-off events. For 32958/32958 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 7831 event pairs, 84 based on Foata normal form. 3/1312 useless extension candidates. Maximal degree in co-relation 9857. Up to 1215 conditions per place. [2023-11-06 22:57:11,850 INFO L140 encePairwiseOnDemand]: 132/141 looper letters, 288 selfloop transitions, 38 changer transitions 9/335 dead transitions. [2023-11-06 22:57:11,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 335 transitions, 4671 flow [2023-11-06 22:57:11,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:57:11,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:57:11,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1004 transitions. [2023-11-06 22:57:11,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188569044639132 [2023-11-06 22:57:11,853 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1004 transitions. [2023-11-06 22:57:11,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1004 transitions. [2023-11-06 22:57:11,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:11,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1004 transitions. [2023-11-06 22:57:11,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 59.05882352941177) internal successors, (1004), 17 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:11,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 141.0) internal successors, (2538), 18 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:11,858 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 141.0) internal successors, (2538), 18 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:11,858 INFO L175 Difference]: Start difference. First operand has 252 places, 294 transitions, 3724 flow. Second operand 17 states and 1004 transitions. [2023-11-06 22:57:11,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 335 transitions, 4671 flow [2023-11-06 22:57:12,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 335 transitions, 4094 flow, removed 265 selfloop flow, removed 8 redundant places. [2023-11-06 22:57:12,041 INFO L231 Difference]: Finished difference. Result has 261 places, 297 transitions, 3328 flow [2023-11-06 22:57:12,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=3147, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3328, PETRI_PLACES=261, PETRI_TRANSITIONS=297} [2023-11-06 22:57:12,042 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 241 predicate places. [2023-11-06 22:57:12,043 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 297 transitions, 3328 flow [2023-11-06 22:57:12,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 55.94444444444444) internal successors, (1007), 18 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:12,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:12,043 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:12,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:12,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 22:57:12,244 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:57:12,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:12,244 INFO L85 PathProgramCache]: Analyzing trace with hash -592258159, now seen corresponding path program 17 times [2023-11-06 22:57:12,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:12,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795386302] [2023-11-06 22:57:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:12,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:13,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:13,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795386302] [2023-11-06 22:57:13,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795386302] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:13,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755643156] [2023-11-06 22:57:13,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:57:13,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:13,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:13,440 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:13,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:57:13,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:57:13,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:57:13,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:57:13,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:14,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:14,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755643156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:14,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:14,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-11-06 22:57:14,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29815436] [2023-11-06 22:57:14,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:14,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:57:14,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:14,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:57:14,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:57:16,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:57:16,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 297 transitions, 3328 flow. Second operand has 22 states, 22 states have (on average 55.72727272727273) internal successors, (1226), 22 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:16,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:16,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:57:16,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:21,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:57:25,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:57:27,922 INFO L124 PetriNetUnfolderBase]: 776/1504 cut-off events. [2023-11-06 22:57:27,922 INFO L125 PetriNetUnfolderBase]: For 37710/37710 co-relation queries the response was YES. [2023-11-06 22:57:27,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11187 conditions, 1504 events. 776/1504 cut-off events. For 37710/37710 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 9136 event pairs, 78 based on Foata normal form. 4/1490 useless extension candidates. Maximal degree in co-relation 11100. Up to 1092 conditions per place. [2023-11-06 22:57:27,936 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 256 selfloop transitions, 132 changer transitions 18/406 dead transitions. [2023-11-06 22:57:27,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 406 transitions, 5689 flow [2023-11-06 22:57:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:57:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 22:57:27,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1885 transitions. [2023-11-06 22:57:27,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41777482269503546 [2023-11-06 22:57:27,940 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1885 transitions. [2023-11-06 22:57:27,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1885 transitions. [2023-11-06 22:57:27,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:27,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1885 transitions. [2023-11-06 22:57:27,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 58.90625) internal successors, (1885), 32 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:27,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 141.0) internal successors, (4653), 33 states have internal predecessors, (4653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:27,948 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 141.0) internal successors, (4653), 33 states have internal predecessors, (4653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:27,948 INFO L175 Difference]: Start difference. First operand has 261 places, 297 transitions, 3328 flow. Second operand 32 states and 1885 transitions. [2023-11-06 22:57:27,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 406 transitions, 5689 flow [2023-11-06 22:57:28,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 406 transitions, 5507 flow, removed 51 selfloop flow, removed 16 redundant places. [2023-11-06 22:57:28,158 INFO L231 Difference]: Finished difference. Result has 283 places, 334 transitions, 4612 flow [2023-11-06 22:57:28,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=3143, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=4612, PETRI_PLACES=283, PETRI_TRANSITIONS=334} [2023-11-06 22:57:28,159 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 263 predicate places. [2023-11-06 22:57:28,159 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 334 transitions, 4612 flow [2023-11-06 22:57:28,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 55.72727272727273) internal successors, (1226), 22 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:28,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:28,160 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:28,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:28,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:57:28,362 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:57:28,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:28,362 INFO L85 PathProgramCache]: Analyzing trace with hash -22304277, now seen corresponding path program 18 times [2023-11-06 22:57:28,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:28,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870164326] [2023-11-06 22:57:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:28,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:29,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:29,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870164326] [2023-11-06 22:57:29,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870164326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:29,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237072195] [2023-11-06 22:57:29,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:57:29,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:29,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:29,254 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:29,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:57:29,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:57:29,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:57:29,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:57:29,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:29,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:33,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237072195] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:33,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:33,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-06 22:57:33,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107992674] [2023-11-06 22:57:33,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:33,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:57:33,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:33,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:57:33,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:57:34,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 141 [2023-11-06 22:57:34,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 334 transitions, 4612 flow. Second operand has 21 states, 21 states have (on average 55.857142857142854) internal successors, (1173), 21 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:34,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:34,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 141 [2023-11-06 22:57:34,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:42,318 INFO L124 PetriNetUnfolderBase]: 822/1591 cut-off events. [2023-11-06 22:57:42,318 INFO L125 PetriNetUnfolderBase]: For 56561/56561 co-relation queries the response was YES. [2023-11-06 22:57:42,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13124 conditions, 1591 events. 822/1591 cut-off events. For 56561/56561 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 9879 event pairs, 51 based on Foata normal form. 4/1577 useless extension candidates. Maximal degree in co-relation 13031. Up to 1152 conditions per place. [2023-11-06 22:57:42,336 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 325 selfloop transitions, 99 changer transitions 30/454 dead transitions. [2023-11-06 22:57:42,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 454 transitions, 7138 flow [2023-11-06 22:57:42,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 22:57:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-06 22:57:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1957 transitions. [2023-11-06 22:57:42,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42058886739737805 [2023-11-06 22:57:42,340 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1957 transitions. [2023-11-06 22:57:42,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1957 transitions. [2023-11-06 22:57:42,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:42,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1957 transitions. [2023-11-06 22:57:42,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 59.303030303030305) internal successors, (1957), 33 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:42,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 141.0) internal successors, (4794), 34 states have internal predecessors, (4794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:42,350 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 141.0) internal successors, (4794), 34 states have internal predecessors, (4794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:42,350 INFO L175 Difference]: Start difference. First operand has 283 places, 334 transitions, 4612 flow. Second operand 33 states and 1957 transitions. [2023-11-06 22:57:42,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 454 transitions, 7138 flow [2023-11-06 22:57:42,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 454 transitions, 6184 flow, removed 429 selfloop flow, removed 18 redundant places. [2023-11-06 22:57:42,733 INFO L231 Difference]: Finished difference. Result has 303 places, 359 transitions, 4806 flow [2023-11-06 22:57:42,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4806, PETRI_PLACES=303, PETRI_TRANSITIONS=359} [2023-11-06 22:57:42,734 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 283 predicate places. [2023-11-06 22:57:42,734 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 359 transitions, 4806 flow [2023-11-06 22:57:42,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.857142857142854) internal successors, (1173), 21 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:42,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:42,735 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:42,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:42,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:57:42,941 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:57:42,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:42,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1919239049, now seen corresponding path program 19 times [2023-11-06 22:57:42,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:42,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033135934] [2023-11-06 22:57:42,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:42,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:43,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:43,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033135934] [2023-11-06 22:57:43,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033135934] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:43,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935140759] [2023-11-06 22:57:43,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:57:43,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:43,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:43,928 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:43,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:57:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:44,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:57:44,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:46,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:53,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935140759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:53,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:53,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-06 22:57:53,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071369397] [2023-11-06 22:57:53,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:53,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:57:53,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:53,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:57:53,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=332, Unknown=2, NotChecked=0, Total=420 [2023-11-06 22:57:55,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:57:59,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:57:59,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 141 [2023-11-06 22:57:59,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 359 transitions, 4806 flow. Second operand has 21 states, 21 states have (on average 52.76190476190476) internal successors, (1108), 21 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:59,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:59,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 141 [2023-11-06 22:57:59,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:04,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:58:06,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:58:18,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:58:22,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:58:28,617 INFO L124 PetriNetUnfolderBase]: 864/1687 cut-off events. [2023-11-06 22:58:28,617 INFO L125 PetriNetUnfolderBase]: For 66993/66993 co-relation queries the response was YES. [2023-11-06 22:58:28,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14262 conditions, 1687 events. 864/1687 cut-off events. For 66993/66993 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 10666 event pairs, 47 based on Foata normal form. 3/1674 useless extension candidates. Maximal degree in co-relation 14164. Up to 1128 conditions per place. [2023-11-06 22:58:28,634 INFO L140 encePairwiseOnDemand]: 133/141 looper letters, 318 selfloop transitions, 130 changer transitions 18/466 dead transitions. [2023-11-06 22:58:28,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 466 transitions, 7397 flow [2023-11-06 22:58:28,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:58:28,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 22:58:28,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1909 transitions. [2023-11-06 22:58:28,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3982060909470171 [2023-11-06 22:58:28,639 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1909 transitions. [2023-11-06 22:58:28,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1909 transitions. [2023-11-06 22:58:28,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:28,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1909 transitions. [2023-11-06 22:58:28,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 56.14705882352941) internal successors, (1909), 34 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:28,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 141.0) internal successors, (4935), 35 states have internal predecessors, (4935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:28,647 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 141.0) internal successors, (4935), 35 states have internal predecessors, (4935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:28,647 INFO L175 Difference]: Start difference. First operand has 303 places, 359 transitions, 4806 flow. Second operand 34 states and 1909 transitions. [2023-11-06 22:58:28,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 466 transitions, 7397 flow [2023-11-06 22:58:28,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 466 transitions, 6564 flow, removed 380 selfloop flow, removed 16 redundant places. [2023-11-06 22:58:28,936 INFO L231 Difference]: Finished difference. Result has 324 places, 377 transitions, 5151 flow [2023-11-06 22:58:28,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=4039, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5151, PETRI_PLACES=324, PETRI_TRANSITIONS=377} [2023-11-06 22:58:28,937 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 304 predicate places. [2023-11-06 22:58:28,937 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 377 transitions, 5151 flow [2023-11-06 22:58:28,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.76190476190476) internal successors, (1108), 21 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:28,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:28,938 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:28,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:29,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:58:29,140 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:58:29,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:29,141 INFO L85 PathProgramCache]: Analyzing trace with hash 659497354, now seen corresponding path program 6 times [2023-11-06 22:58:29,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:29,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145031182] [2023-11-06 22:58:29,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:29,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:29,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:29,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145031182] [2023-11-06 22:58:29,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145031182] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:29,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502384092] [2023-11-06 22:58:29,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:58:29,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:29,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:29,556 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:29,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 22:58:29,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:58:29,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:29,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:58:29,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:29,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:30,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502384092] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:30,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:58:30,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 5] total 18 [2023-11-06 22:58:30,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809908584] [2023-11-06 22:58:30,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:30,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:58:30,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:30,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:58:30,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:58:30,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 141 [2023-11-06 22:58:30,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 377 transitions, 5151 flow. Second operand has 20 states, 20 states have (on average 57.15) internal successors, (1143), 20 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:30,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:30,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 141 [2023-11-06 22:58:30,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:33,283 INFO L124 PetriNetUnfolderBase]: 855/1676 cut-off events. [2023-11-06 22:58:33,283 INFO L125 PetriNetUnfolderBase]: For 56351/56351 co-relation queries the response was YES. [2023-11-06 22:58:33,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13262 conditions, 1676 events. 855/1676 cut-off events. For 56351/56351 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 10638 event pairs, 70 based on Foata normal form. 3/1659 useless extension candidates. Maximal degree in co-relation 13162. Up to 1452 conditions per place. [2023-11-06 22:58:33,301 INFO L140 encePairwiseOnDemand]: 134/141 looper letters, 346 selfloop transitions, 63 changer transitions 20/429 dead transitions. [2023-11-06 22:58:33,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 429 transitions, 6321 flow [2023-11-06 22:58:33,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:58:33,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:58:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1149 transitions. [2023-11-06 22:58:33,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42889137737961924 [2023-11-06 22:58:33,305 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1149 transitions. [2023-11-06 22:58:33,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1149 transitions. [2023-11-06 22:58:33,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:33,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1149 transitions. [2023-11-06 22:58:33,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 60.473684210526315) internal successors, (1149), 19 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:33,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 141.0) internal successors, (2820), 20 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:33,312 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 141.0) internal successors, (2820), 20 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:33,312 INFO L175 Difference]: Start difference. First operand has 324 places, 377 transitions, 5151 flow. Second operand 19 states and 1149 transitions. [2023-11-06 22:58:33,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 429 transitions, 6321 flow [2023-11-06 22:58:33,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 429 transitions, 5728 flow, removed 247 selfloop flow, removed 22 redundant places. [2023-11-06 22:58:33,632 INFO L231 Difference]: Finished difference. Result has 320 places, 375 transitions, 4715 flow [2023-11-06 22:58:33,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=4562, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4715, PETRI_PLACES=320, PETRI_TRANSITIONS=375} [2023-11-06 22:58:33,633 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 300 predicate places. [2023-11-06 22:58:33,634 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 375 transitions, 4715 flow [2023-11-06 22:58:33,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.15) internal successors, (1143), 20 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:33,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:33,634 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:33,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:33,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:33,840 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:58:33,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:33,840 INFO L85 PathProgramCache]: Analyzing trace with hash 814632544, now seen corresponding path program 7 times [2023-11-06 22:58:33,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:33,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795554700] [2023-11-06 22:58:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:33,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:34,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:34,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795554700] [2023-11-06 22:58:34,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795554700] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:34,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482323963] [2023-11-06 22:58:34,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:58:34,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:34,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:34,283 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:34,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 22:58:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:34,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:58:34,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:34,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:58:34,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482323963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:34,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:58:34,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 13 [2023-11-06 22:58:34,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820389796] [2023-11-06 22:58:34,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:34,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:58:34,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:34,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:58:34,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:58:35,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2023-11-06 22:58:35,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 375 transitions, 4715 flow. Second operand has 15 states, 15 states have (on average 63.46666666666667) internal successors, (952), 15 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:35,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:58:35,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2023-11-06 22:58:35,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:43,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:58:47,192 INFO L124 PetriNetUnfolderBase]: 843/1663 cut-off events. [2023-11-06 22:58:47,192 INFO L125 PetriNetUnfolderBase]: For 47416/47435 co-relation queries the response was YES. [2023-11-06 22:58:47,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12609 conditions, 1663 events. 843/1663 cut-off events. For 47416/47435 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 10614 event pairs, 74 based on Foata normal form. 4/1640 useless extension candidates. Maximal degree in co-relation 12508. Up to 1403 conditions per place. [2023-11-06 22:58:47,215 INFO L140 encePairwiseOnDemand]: 135/141 looper letters, 332 selfloop transitions, 52 changer transitions 38/429 dead transitions. [2023-11-06 22:58:47,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 429 transitions, 6096 flow [2023-11-06 22:58:47,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:58:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:58:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1195 transitions. [2023-11-06 22:58:47,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47084318360914107 [2023-11-06 22:58:47,221 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1195 transitions. [2023-11-06 22:58:47,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1195 transitions. [2023-11-06 22:58:47,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:58:47,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1195 transitions. [2023-11-06 22:58:47,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.38888888888889) internal successors, (1195), 18 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:47,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 141.0) internal successors, (2679), 19 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:47,227 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 141.0) internal successors, (2679), 19 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:47,227 INFO L175 Difference]: Start difference. First operand has 320 places, 375 transitions, 4715 flow. Second operand 18 states and 1195 transitions. [2023-11-06 22:58:47,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 429 transitions, 6096 flow [2023-11-06 22:58:47,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 429 transitions, 5942 flow, removed 27 selfloop flow, removed 15 redundant places. [2023-11-06 22:58:47,540 INFO L231 Difference]: Finished difference. Result has 323 places, 363 transitions, 4599 flow [2023-11-06 22:58:47,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=4581, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4599, PETRI_PLACES=323, PETRI_TRANSITIONS=363} [2023-11-06 22:58:47,541 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 303 predicate places. [2023-11-06 22:58:47,541 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 363 transitions, 4599 flow [2023-11-06 22:58:47,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 63.46666666666667) internal successors, (952), 15 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:47,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:58:47,541 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:47,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:47,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-06 22:58:47,742 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:58:47,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:47,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1631471973, now seen corresponding path program 20 times [2023-11-06 22:58:47,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:47,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247720585] [2023-11-06 22:58:47,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:47,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:48,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:48,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247720585] [2023-11-06 22:58:48,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247720585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:48,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856868907] [2023-11-06 22:58:48,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:58:48,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:48,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:48,612 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:48,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d607194-5905-43c3-8ad5-464d107b0202/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 22:58:48,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:58:48,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:48,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:58:48,828 INFO L285 TraceCheckSpWp]: Computing forward predicates...