./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/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_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/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_30cc4840-4e78-4a38-a007-65eb140b152a/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 95e3bac7f28ae020b684175cea363a5866905518c289fbd40a07a7a3764acade --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:49:23,209 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:49:23,292 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:49:23,297 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:49:23,298 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:49:23,320 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:49:23,321 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:49:23,322 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:49:23,322 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:49:23,323 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:49:23,324 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:49:23,324 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:49:23,325 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:49:23,325 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:49:23,326 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:49:23,326 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:49:23,327 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:49:23,327 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:49:23,328 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:49:23,328 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:49:23,329 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:49:23,330 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:49:23,330 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:49:23,331 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:49:23,331 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:49:23,332 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:49:23,332 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:49:23,333 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:49:23,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:49:23,334 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:49:23,334 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:49:23,335 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:49:23,335 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:49:23,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:49:23,336 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:49:23,337 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:49:23,337 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:49:23,338 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:49:23,338 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:49:23,339 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_30cc4840-4e78-4a38-a007-65eb140b152a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95e3bac7f28ae020b684175cea363a5866905518c289fbd40a07a7a3764acade [2023-11-06 22:49:23,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:49:23,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:49:23,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:49:23,691 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:49:23,691 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:49:23,693 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2023-11-06 22:49:26,760 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:49:26,979 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:49:26,979 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2023-11-06 22:49:26,988 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/data/dfc7321ae/07e8a7fa9cc1430c9129e327031eb53c/FLAGf4fa341bf [2023-11-06 22:49:27,004 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/data/dfc7321ae/07e8a7fa9cc1430c9129e327031eb53c [2023-11-06 22:49:27,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:49:27,008 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:49:27,010 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:49:27,010 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:49:27,016 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:49:27,017 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:27" (1/1) ... [2023-11-06 22:49:27,018 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70b915cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:27, skipping insertion in model container [2023-11-06 22:49:27,018 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:27" (1/1) ... [2023-11-06 22:49:27,045 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:49:27,237 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_30cc4840-4e78-4a38-a007-65eb140b152a/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2641,2654] [2023-11-06 22:49:27,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:49:27,309 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:49:27,356 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_30cc4840-4e78-4a38-a007-65eb140b152a/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2641,2654] [2023-11-06 22:49:27,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:49:27,376 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:49:27,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:27 WrapperNode [2023-11-06 22:49:27,377 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:49:27,378 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:49:27,378 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:49:27,388 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:49:27,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:27" (1/1) ... [2023-11-06 22:49:27,403 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:27" (1/1) ... [2023-11-06 22:49:27,433 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 165 [2023-11-06 22:49:27,433 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:49:27,434 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:49:27,434 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:49:27,434 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:49:27,443 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:27" (1/1) ... [2023-11-06 22:49:27,443 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:27" (1/1) ... [2023-11-06 22:49:27,447 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:27" (1/1) ... [2023-11-06 22:49:27,447 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:27" (1/1) ... [2023-11-06 22:49:27,456 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:27" (1/1) ... [2023-11-06 22:49:27,461 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:27" (1/1) ... [2023-11-06 22:49:27,463 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:27" (1/1) ... [2023-11-06 22:49:27,465 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:27" (1/1) ... [2023-11-06 22:49:27,469 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:49:27,470 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:49:27,470 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:49:27,470 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:49:27,471 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:27" (1/1) ... [2023-11-06 22:49:27,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:49:27,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:27,519 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:49:27,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:49:27,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:49:27,571 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:49:27,571 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:49:27,571 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:49:27,571 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:49:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:49:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:49:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:49:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:49:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:49:27,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:49:27,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:49:27,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:49:27,575 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 22:49:27,731 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:49:27,733 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:49:28,098 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:49:28,110 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:49:28,111 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:49:28,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:28 BoogieIcfgContainer [2023-11-06 22:49:28,120 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:49:28,123 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:49:28,123 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:49:28,126 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:49:28,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:49:27" (1/3) ... [2023-11-06 22:49:28,128 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf78e14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:28, skipping insertion in model container [2023-11-06 22:49:28,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:27" (2/3) ... [2023-11-06 22:49:28,128 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf78e14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:28, skipping insertion in model container [2023-11-06 22:49:28,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:28" (3/3) ... [2023-11-06 22:49:28,130 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2023-11-06 22:49:28,139 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:49:28,152 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:49:28,152 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:49:28,152 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:49:28,280 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:49:28,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 209 transitions, 432 flow [2023-11-06 22:49:28,434 INFO L124 PetriNetUnfolderBase]: 18/207 cut-off events. [2023-11-06 22:49:28,435 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:49:28,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 207 events. 18/207 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 314 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2023-11-06 22:49:28,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 209 transitions, 432 flow [2023-11-06 22:49:28,451 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 198 transitions, 408 flow [2023-11-06 22:49:28,459 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:49:28,478 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 187 places, 198 transitions, 408 flow [2023-11-06 22:49:28,489 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 187 places, 198 transitions, 408 flow [2023-11-06 22:49:28,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 198 transitions, 408 flow [2023-11-06 22:49:28,568 INFO L124 PetriNetUnfolderBase]: 18/198 cut-off events. [2023-11-06 22:49:28,568 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:49:28,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 198 events. 18/198 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 293 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2023-11-06 22:49:28,575 INFO L119 LiptonReduction]: Number of co-enabled transitions 4520 [2023-11-06 22:49:35,865 INFO L134 LiptonReduction]: Checked pairs total: 4313 [2023-11-06 22:49:35,865 INFO L136 LiptonReduction]: Total number of compositions: 239 [2023-11-06 22:49:35,884 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:49:35,892 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;@1b9b162f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:49:35,893 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:49:35,902 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:49:35,902 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-06 22:49:35,902 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:49:35,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:35,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:35,904 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 22:49:35,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:35,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1385559307, now seen corresponding path program 1 times [2023-11-06 22:49:35,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:35,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732908901] [2023-11-06 22:49:35,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:35,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:36,392 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 22:49:36,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:36,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732908901] [2023-11-06 22:49:36,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732908901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:36,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:49:36,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:49:36,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532880805] [2023-11-06 22:49:36,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:36,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:49:36,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:36,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:49:36,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:49:36,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 448 [2023-11-06 22:49:36,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:36,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:36,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 448 [2023-11-06 22:49:36,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:36,583 INFO L124 PetriNetUnfolderBase]: 45/80 cut-off events. [2023-11-06 22:49:36,583 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:49:36,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 182 event pairs, 18 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-11-06 22:49:36,586 INFO L140 encePairwiseOnDemand]: 445/448 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-11-06 22:49:36,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-11-06 22:49:36,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:49:36,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:49:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2023-11-06 22:49:36,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4211309523809524 [2023-11-06 22:49:36,608 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2023-11-06 22:49:36,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2023-11-06 22:49:36,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:36,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2023-11-06 22:49:36,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:36,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:36,632 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:36,634 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 566 transitions. [2023-11-06 22:49:36,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-11-06 22:49:36,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:49:36,640 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-11-06 22:49:36,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-11-06 22:49:36,646 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-06 22:49:36,646 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-11-06 22:49:36,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:36,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:36,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:36,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:49:36,648 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 22:49:36,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:36,649 INFO L85 PathProgramCache]: Analyzing trace with hash -586449959, now seen corresponding path program 1 times [2023-11-06 22:49:36,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:36,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907546836] [2023-11-06 22:49:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:36,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:49:37,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:37,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907546836] [2023-11-06 22:49:37,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907546836] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:37,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:49:37,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:49:37,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204481199] [2023-11-06 22:49:37,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:37,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:49:37,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:37,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:49:37,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:49:37,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 448 [2023-11-06 22:49:37,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 182.0) internal successors, (910), 5 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:37,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:37,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 448 [2023-11-06 22:49:37,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:37,578 INFO L124 PetriNetUnfolderBase]: 72/135 cut-off events. [2023-11-06 22:49:37,578 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:49:37,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 370 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2023-11-06 22:49:37,580 INFO L140 encePairwiseOnDemand]: 442/448 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-11-06 22:49:37,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-11-06 22:49:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:49:37,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:49:37,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 935 transitions. [2023-11-06 22:49:37,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174107142857143 [2023-11-06 22:49:37,586 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 935 transitions. [2023-11-06 22:49:37,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 935 transitions. [2023-11-06 22:49:37,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:37,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 935 transitions. [2023-11-06 22:49:37,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 187.0) internal successors, (935), 5 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:37,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 448.0) internal successors, (2688), 6 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:37,601 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 448.0) internal successors, (2688), 6 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:37,602 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 935 transitions. [2023-11-06 22:49:37,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-11-06 22:49:37,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:49:37,604 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-11-06 22:49:37,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-11-06 22:49:37,605 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-06 22:49:37,606 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-11-06 22:49:37,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 182.0) internal successors, (910), 5 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:37,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:37,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:37,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:49:37,608 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 22:49:37,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:37,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1782283913, now seen corresponding path program 2 times [2023-11-06 22:49:37,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:37,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46329299] [2023-11-06 22:49:37,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:37,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:49:38,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:38,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46329299] [2023-11-06 22:49:38,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46329299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:38,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:49:38,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:49:38,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802327320] [2023-11-06 22:49:38,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:38,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:49:38,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:38,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:49:38,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:49:38,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 448 [2023-11-06 22:49:38,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 170.5) internal successors, (1023), 6 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:38,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:38,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 448 [2023-11-06 22:49:38,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:38,499 INFO L124 PetriNetUnfolderBase]: 123/229 cut-off events. [2023-11-06 22:49:38,499 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-11-06 22:49:38,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 229 events. 123/229 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 757 event pairs, 4 based on Foata normal form. 1/181 useless extension candidates. Maximal degree in co-relation 638. Up to 93 conditions per place. [2023-11-06 22:49:38,504 INFO L140 encePairwiseOnDemand]: 440/448 looper letters, 47 selfloop transitions, 22 changer transitions 2/71 dead transitions. [2023-11-06 22:49:38,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 71 transitions, 390 flow [2023-11-06 22:49:38,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:49:38,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:49:38,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1579 transitions. [2023-11-06 22:49:38,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3916170634920635 [2023-11-06 22:49:38,512 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1579 transitions. [2023-11-06 22:49:38,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1579 transitions. [2023-11-06 22:49:38,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:38,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1579 transitions. [2023-11-06 22:49:38,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:38,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 448.0) internal successors, (4480), 10 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:38,533 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 448.0) internal successors, (4480), 10 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:38,533 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 9 states and 1579 transitions. [2023-11-06 22:49:38,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 71 transitions, 390 flow [2023-11-06 22:49:38,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 71 transitions, 372 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-06 22:49:38,538 INFO L231 Difference]: Finished difference. Result has 36 places, 39 transitions, 210 flow [2023-11-06 22:49:38,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=210, PETRI_PLACES=36, PETRI_TRANSITIONS=39} [2023-11-06 22:49:38,539 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2023-11-06 22:49:38,539 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 39 transitions, 210 flow [2023-11-06 22:49:38,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 170.5) internal successors, (1023), 6 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:38,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:38,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:38,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:49:38,542 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 22:49:38,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:38,542 INFO L85 PathProgramCache]: Analyzing trace with hash -987764629, now seen corresponding path program 3 times [2023-11-06 22:49:38,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:38,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364102453] [2023-11-06 22:49:38,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:38,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:49:38,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:38,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364102453] [2023-11-06 22:49:38,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364102453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:38,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:49:38,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:49:38,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344984090] [2023-11-06 22:49:38,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:38,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:49:38,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:38,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:49:38,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:49:39,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 448 [2023-11-06 22:49:39,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 39 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 169.5) internal successors, (1017), 6 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:39,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:39,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 448 [2023-11-06 22:49:39,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:39,383 INFO L124 PetriNetUnfolderBase]: 132/239 cut-off events. [2023-11-06 22:49:39,383 INFO L125 PetriNetUnfolderBase]: For 309/309 co-relation queries the response was YES. [2023-11-06 22:49:39,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 830 conditions, 239 events. 132/239 cut-off events. For 309/309 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 770 event pairs, 17 based on Foata normal form. 4/222 useless extension candidates. Maximal degree in co-relation 808. Up to 190 conditions per place. [2023-11-06 22:49:39,387 INFO L140 encePairwiseOnDemand]: 441/448 looper letters, 42 selfloop transitions, 17 changer transitions 0/59 dead transitions. [2023-11-06 22:49:39,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 59 transitions, 402 flow [2023-11-06 22:49:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:49:39,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:49:39,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1048 transitions. [2023-11-06 22:49:39,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2023-11-06 22:49:39,393 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1048 transitions. [2023-11-06 22:49:39,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1048 transitions. [2023-11-06 22:49:39,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:39,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1048 transitions. [2023-11-06 22:49:39,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 174.66666666666666) internal successors, (1048), 6 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:39,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 448.0) internal successors, (3136), 7 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:39,407 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 448.0) internal successors, (3136), 7 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:39,407 INFO L175 Difference]: Start difference. First operand has 36 places, 39 transitions, 210 flow. Second operand 6 states and 1048 transitions. [2023-11-06 22:49:39,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 59 transitions, 402 flow [2023-11-06 22:49:39,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 59 transitions, 366 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-11-06 22:49:39,413 INFO L231 Difference]: Finished difference. Result has 41 places, 44 transitions, 250 flow [2023-11-06 22:49:39,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=250, PETRI_PLACES=41, PETRI_TRANSITIONS=44} [2023-11-06 22:49:39,415 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-11-06 22:49:39,415 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 44 transitions, 250 flow [2023-11-06 22:49:39,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 169.5) internal successors, (1017), 6 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:39,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:39,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:39,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:49:39,417 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 22:49:39,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:39,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1687293045, now seen corresponding path program 4 times [2023-11-06 22:49:39,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:39,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568571904] [2023-11-06 22:49:39,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:39,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:49:39,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:39,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568571904] [2023-11-06 22:49:39,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568571904] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:39,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:49:39,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:49:39,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040944008] [2023-11-06 22:49:39,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:39,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:49:39,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:39,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:49:39,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:49:39,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 448 [2023-11-06 22:49:39,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:39,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:49:39,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 448 [2023-11-06 22:49:39,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:49:40,006 INFO L124 PetriNetUnfolderBase]: 129/230 cut-off events. [2023-11-06 22:49:40,007 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2023-11-06 22:49:40,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 230 events. 129/230 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 705 event pairs, 44 based on Foata normal form. 4/213 useless extension candidates. Maximal degree in co-relation 752. Up to 187 conditions per place. [2023-11-06 22:49:40,010 INFO L140 encePairwiseOnDemand]: 442/448 looper letters, 37 selfloop transitions, 18 changer transitions 0/55 dead transitions. [2023-11-06 22:49:40,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 403 flow [2023-11-06 22:49:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:49:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:49:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 910 transitions. [2023-11-06 22:49:40,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2023-11-06 22:49:40,015 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 910 transitions. [2023-11-06 22:49:40,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 910 transitions. [2023-11-06 22:49:40,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:49:40,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 910 transitions. [2023-11-06 22:49:40,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 182.0) internal successors, (910), 5 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:40,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 448.0) internal successors, (2688), 6 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:40,026 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 448.0) internal successors, (2688), 6 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:40,026 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 250 flow. Second operand 5 states and 910 transitions. [2023-11-06 22:49:40,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 403 flow [2023-11-06 22:49:40,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 375 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-06 22:49:40,033 INFO L231 Difference]: Finished difference. Result has 44 places, 46 transitions, 282 flow [2023-11-06 22:49:40,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=44, PETRI_TRANSITIONS=46} [2023-11-06 22:49:40,036 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-11-06 22:49:40,037 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 46 transitions, 282 flow [2023-11-06 22:49:40,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:40,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:49:40,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:40,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:49:40,038 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 22:49:40,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:40,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1093227456, now seen corresponding path program 1 times [2023-11-06 22:49:40,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:40,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976243280] [2023-11-06 22:49:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:40,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:49:40,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:40,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976243280] [2023-11-06 22:49:40,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976243280] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:40,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333178630] [2023-11-06 22:49:40,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:40,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:40,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:40,571 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:40,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:49:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:40,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:49:40,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:40,830 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:49:40,899 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:49:40,977 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:49:41,315 INFO L322 Elim1Store]: treesize reduction 74, result has 14.9 percent of original size [2023-11-06 22:49:41,315 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 233 treesize of output 176 [2023-11-06 22:49:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:49:41,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:43,497 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:49:43,497 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 158 [2023-11-06 22:49:43,534 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:49:43,535 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 966 treesize of output 870 [2023-11-06 22:49:43,619 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:49:43,620 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 162 [2023-11-06 22:49:44,710 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:49:44,711 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 217 treesize of output 157 [2023-11-06 22:49:45,338 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-06 22:49:45,339 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 444 treesize of output 1 [2023-11-06 22:49:45,408 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 22:49:45,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333178630] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:49:45,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:49:45,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-06 22:49:45,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462676795] [2023-11-06 22:49:45,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:45,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:49:45,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:45,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:49:45,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=237, Unknown=2, NotChecked=0, Total=306 [2023-11-06 22:49:47,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:49:49,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:49:52,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:49:54,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:49:57,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:50:00,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:50:02,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:50:04,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:50:06,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:50:08,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:50:08,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 448 [2023-11-06 22:50:08,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 46 transitions, 282 flow. Second operand has 18 states, 18 states have (on average 113.66666666666667) internal successors, (2046), 18 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:08,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:50:08,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 448 [2023-11-06 22:50:08,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:50:08,850 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (let ((.cse3 (select |c_#memory_int| c_~f~0.base))) (let ((.cse0 (select .cse3 .cse4))) (let ((.cse1 (select .cse3 (+ (* .cse0 4) c_~f~0.offset)))) (or (< .cse0 0) (< c_~size~0 (+ .cse1 1)) (< c_~size~0 (+ .cse0 1)) (< .cse1 0) (let ((.cse2 (select .cse3 (+ c_~f~0.offset (* 4 .cse1))))) (and (or (< .cse2 0) (= c_~x1~0 (select .cse3 (+ c_~f~0.offset (* .cse2 4)))) (< c_~size~0 (+ .cse2 1))) (= .cse2 c_~x1~0))))))) (forall ((v_ArrVal_85 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_85) c_~f~0.base))) (let ((.cse7 (select .cse6 .cse4))) (let ((.cse8 (select .cse6 (+ (* .cse7 4) c_~f~0.offset)))) (let ((.cse5 (select .cse6 (+ c_~f~0.offset (* .cse8 4))))) (or (< c_~size~0 (+ .cse5 1)) (< .cse5 0) (= c_~x1~0 (select .cse6 (+ c_~f~0.offset (* .cse5 4)))) (< .cse7 0) (< .cse8 0) (< c_~size~0 (+ .cse8 1)) (< c_~size~0 (+ .cse7 1)))))))) (forall ((v_ArrVal_85 (Array Int Int))) (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_85) c_~f~0.base))) (let ((.cse11 (select .cse9 .cse4))) (let ((.cse10 (select .cse9 (+ (* .cse11 4) c_~f~0.offset)))) (or (= (select .cse9 (+ c_~f~0.offset (* .cse10 4))) c_~x1~0) (< .cse11 0) (< .cse10 0) (< c_~size~0 (+ .cse10 1)) (< c_~size~0 (+ .cse11 1))))))))) is different from false [2023-11-06 22:50:11,044 INFO L124 PetriNetUnfolderBase]: 358/655 cut-off events. [2023-11-06 22:50:11,044 INFO L125 PetriNetUnfolderBase]: For 802/802 co-relation queries the response was YES. [2023-11-06 22:50:11,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2184 conditions, 655 events. 358/655 cut-off events. For 802/802 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2969 event pairs, 26 based on Foata normal form. 8/591 useless extension candidates. Maximal degree in co-relation 1551. Up to 207 conditions per place. [2023-11-06 22:50:11,050 INFO L140 encePairwiseOnDemand]: 435/448 looper letters, 76 selfloop transitions, 47 changer transitions 73/196 dead transitions. [2023-11-06 22:50:11,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 196 transitions, 1312 flow [2023-11-06 22:50:11,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:50:11,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 22:50:11,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2953 transitions. [2023-11-06 22:50:11,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2636607142857143 [2023-11-06 22:50:11,067 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2953 transitions. [2023-11-06 22:50:11,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2953 transitions. [2023-11-06 22:50:11,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:50:11,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2953 transitions. [2023-11-06 22:50:11,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 118.12) internal successors, (2953), 25 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:11,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 448.0) internal successors, (11648), 26 states have internal predecessors, (11648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:11,108 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 448.0) internal successors, (11648), 26 states have internal predecessors, (11648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:11,109 INFO L175 Difference]: Start difference. First operand has 44 places, 46 transitions, 282 flow. Second operand 25 states and 2953 transitions. [2023-11-06 22:50:11,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 196 transitions, 1312 flow [2023-11-06 22:50:11,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 196 transitions, 1198 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-06 22:50:11,118 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 521 flow [2023-11-06 22:50:11,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=521, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2023-11-06 22:50:11,121 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2023-11-06 22:50:11,123 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 521 flow [2023-11-06 22:50:11,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 113.66666666666667) internal successors, (2046), 18 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:11,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:50:11,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:11,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:11,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:50:11,343 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 22:50:11,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:11,344 INFO L85 PathProgramCache]: Analyzing trace with hash -337354894, now seen corresponding path program 1 times [2023-11-06 22:50:11,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:11,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372202432] [2023-11-06 22:50:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:11,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:50:11,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:11,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372202432] [2023-11-06 22:50:11,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372202432] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:50:11,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360100991] [2023-11-06 22:50:11,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:11,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:11,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:11,643 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:11,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:50:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:11,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:50:11,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:12,208 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:50:12,209 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 130 [2023-11-06 22:50:12,323 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 22:50:12,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:13,266 INFO L322 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-11-06 22:50:13,266 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 47 [2023-11-06 22:50:13,588 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 22:50:13,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360100991] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:50:13,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:50:13,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-11-06 22:50:13,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416122881] [2023-11-06 22:50:13,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:50:13,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:50:13,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:13,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:50:13,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:50:17,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 448 [2023-11-06 22:50:17,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 521 flow. Second operand has 20 states, 20 states have (on average 151.4) internal successors, (3028), 20 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:17,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:50:17,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 448 [2023-11-06 22:50:17,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:50:21,856 INFO L124 PetriNetUnfolderBase]: 685/1280 cut-off events. [2023-11-06 22:50:21,856 INFO L125 PetriNetUnfolderBase]: For 2907/2907 co-relation queries the response was YES. [2023-11-06 22:50:21,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5207 conditions, 1280 events. 685/1280 cut-off events. For 2907/2907 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7108 event pairs, 34 based on Foata normal form. 25/1267 useless extension candidates. Maximal degree in co-relation 5065. Up to 634 conditions per place. [2023-11-06 22:50:21,870 INFO L140 encePairwiseOnDemand]: 437/448 looper letters, 142 selfloop transitions, 90 changer transitions 82/314 dead transitions. [2023-11-06 22:50:21,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 314 transitions, 2557 flow [2023-11-06 22:50:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 22:50:21,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-06 22:50:21,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5470 transitions. [2023-11-06 22:50:21,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34885204081632654 [2023-11-06 22:50:21,893 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5470 transitions. [2023-11-06 22:50:21,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5470 transitions. [2023-11-06 22:50:21,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:50:21,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5470 transitions. [2023-11-06 22:50:21,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 156.28571428571428) internal successors, (5470), 35 states have internal predecessors, (5470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:21,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 448.0) internal successors, (16128), 36 states have internal predecessors, (16128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:21,957 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 448.0) internal successors, (16128), 36 states have internal predecessors, (16128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:21,965 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 521 flow. Second operand 35 states and 5470 transitions. [2023-11-06 22:50:21,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 314 transitions, 2557 flow [2023-11-06 22:50:21,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 314 transitions, 2382 flow, removed 80 selfloop flow, removed 7 redundant places. [2023-11-06 22:50:21,994 INFO L231 Difference]: Finished difference. Result has 118 places, 126 transitions, 1263 flow [2023-11-06 22:50:21,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1263, PETRI_PLACES=118, PETRI_TRANSITIONS=126} [2023-11-06 22:50:21,996 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 97 predicate places. [2023-11-06 22:50:21,996 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 126 transitions, 1263 flow [2023-11-06 22:50:21,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 151.4) internal successors, (3028), 20 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:21,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:50:21,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:22,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:22,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:50:22,204 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 22:50:22,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:22,204 INFO L85 PathProgramCache]: Analyzing trace with hash 614264800, now seen corresponding path program 2 times [2023-11-06 22:50:22,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:22,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95686064] [2023-11-06 22:50:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:22,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:50:22,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:22,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95686064] [2023-11-06 22:50:22,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95686064] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:50:22,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361660324] [2023-11-06 22:50:22,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:50:22,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:22,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:22,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:22,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:50:22,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:50:22,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:50:22,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:50:22,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:23,014 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 22:50:23,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:24,323 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:50:24,323 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 199 treesize of output 160 [2023-11-06 22:50:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:50:25,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361660324] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:50:25,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:50:25,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 18 [2023-11-06 22:50:25,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751159695] [2023-11-06 22:50:25,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:50:25,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:50:25,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:25,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:50:25,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:50:30,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 448 [2023-11-06 22:50:30,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 126 transitions, 1263 flow. Second operand has 18 states, 18 states have (on average 152.11111111111111) internal successors, (2738), 18 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:30,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:50:30,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 448 [2023-11-06 22:50:30,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:50:34,290 INFO L124 PetriNetUnfolderBase]: 573/1150 cut-off events. [2023-11-06 22:50:34,290 INFO L125 PetriNetUnfolderBase]: For 8633/8633 co-relation queries the response was YES. [2023-11-06 22:50:34,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6493 conditions, 1150 events. 573/1150 cut-off events. For 8633/8633 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6654 event pairs, 149 based on Foata normal form. 13/1156 useless extension candidates. Maximal degree in co-relation 6332. Up to 839 conditions per place. [2023-11-06 22:50:34,308 INFO L140 encePairwiseOnDemand]: 438/448 looper letters, 139 selfloop transitions, 62 changer transitions 26/227 dead transitions. [2023-11-06 22:50:34,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 227 transitions, 2388 flow [2023-11-06 22:50:34,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:50:34,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 22:50:34,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4046 transitions. [2023-11-06 22:50:34,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3473557692307692 [2023-11-06 22:50:34,327 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4046 transitions. [2023-11-06 22:50:34,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4046 transitions. [2023-11-06 22:50:34,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:50:34,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4046 transitions. [2023-11-06 22:50:34,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 155.6153846153846) internal successors, (4046), 26 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:34,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 448.0) internal successors, (12096), 27 states have internal predecessors, (12096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:34,367 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 448.0) internal successors, (12096), 27 states have internal predecessors, (12096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:34,367 INFO L175 Difference]: Start difference. First operand has 118 places, 126 transitions, 1263 flow. Second operand 26 states and 4046 transitions. [2023-11-06 22:50:34,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 227 transitions, 2388 flow [2023-11-06 22:50:34,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 227 transitions, 2184 flow, removed 97 selfloop flow, removed 12 redundant places. [2023-11-06 22:50:34,418 INFO L231 Difference]: Finished difference. Result has 135 places, 143 transitions, 1515 flow [2023-11-06 22:50:34,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1515, PETRI_PLACES=135, PETRI_TRANSITIONS=143} [2023-11-06 22:50:34,421 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 114 predicate places. [2023-11-06 22:50:34,422 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 143 transitions, 1515 flow [2023-11-06 22:50:34,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 152.11111111111111) internal successors, (2738), 18 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:34,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:50:34,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:34,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:34,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:34,631 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 22:50:34,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:34,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1671554424, now seen corresponding path program 3 times [2023-11-06 22:50:34,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:34,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338709526] [2023-11-06 22:50:34,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:34,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:50:35,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:35,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338709526] [2023-11-06 22:50:35,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338709526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:50:35,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082717802] [2023-11-06 22:50:35,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:50:35,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:35,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:35,030 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:35,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:50:35,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:50:35,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:50:35,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 22:50:35,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:35,232 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:50:35,305 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:50:35,370 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:50:35,723 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:50:35,724 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 130 [2023-11-06 22:50:35,832 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 22:50:35,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:38,715 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:50:38,716 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 94 [2023-11-06 22:50:38,749 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:50:38,749 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 262 [2023-11-06 22:50:38,797 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:50:38,798 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 222 treesize of output 202 [2023-11-06 22:50:38,849 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:50:38,849 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 105 [2023-11-06 22:50:39,624 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 22:50:39,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082717802] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:50:39,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:50:39,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-11-06 22:50:39,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045144103] [2023-11-06 22:50:39,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:50:39,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:50:39,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:39,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:50:39,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=362, Unknown=1, NotChecked=0, Total=462 [2023-11-06 22:50:41,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:50:44,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:50:48,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:50:49,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 448 [2023-11-06 22:50:49,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 143 transitions, 1515 flow. Second operand has 22 states, 22 states have (on average 113.18181818181819) internal successors, (2490), 22 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:49,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:50:49,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 448 [2023-11-06 22:50:49,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:50:54,726 INFO L124 PetriNetUnfolderBase]: 616/1231 cut-off events. [2023-11-06 22:50:54,726 INFO L125 PetriNetUnfolderBase]: For 8771/8771 co-relation queries the response was YES. [2023-11-06 22:50:54,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6939 conditions, 1231 events. 616/1231 cut-off events. For 8771/8771 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7232 event pairs, 72 based on Foata normal form. 14/1238 useless extension candidates. Maximal degree in co-relation 6758. Up to 761 conditions per place. [2023-11-06 22:50:54,739 INFO L140 encePairwiseOnDemand]: 437/448 looper letters, 145 selfloop transitions, 87 changer transitions 30/262 dead transitions. [2023-11-06 22:50:54,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 262 transitions, 2931 flow [2023-11-06 22:50:54,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:50:54,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 22:50:54,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3267 transitions. [2023-11-06 22:50:54,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2604432397959184 [2023-11-06 22:50:54,750 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3267 transitions. [2023-11-06 22:50:54,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3267 transitions. [2023-11-06 22:50:54,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:50:54,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3267 transitions. [2023-11-06 22:50:54,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 116.67857142857143) internal successors, (3267), 28 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:54,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 448.0) internal successors, (12992), 29 states have internal predecessors, (12992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:54,781 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 448.0) internal successors, (12992), 29 states have internal predecessors, (12992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:54,781 INFO L175 Difference]: Start difference. First operand has 135 places, 143 transitions, 1515 flow. Second operand 28 states and 3267 transitions. [2023-11-06 22:50:54,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 262 transitions, 2931 flow [2023-11-06 22:50:54,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 262 transitions, 2815 flow, removed 35 selfloop flow, removed 12 redundant places. [2023-11-06 22:50:54,836 INFO L231 Difference]: Finished difference. Result has 155 places, 168 transitions, 1975 flow [2023-11-06 22:50:54,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=1431, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1975, PETRI_PLACES=155, PETRI_TRANSITIONS=168} [2023-11-06 22:50:54,837 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 134 predicate places. [2023-11-06 22:50:54,838 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 168 transitions, 1975 flow [2023-11-06 22:50:54,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 113.18181818181819) internal successors, (2490), 22 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:54,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:50:54,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:54,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:50:55,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:55,045 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 22:50:55,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:55,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1542372648, now seen corresponding path program 4 times [2023-11-06 22:50:55,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:55,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620997988] [2023-11-06 22:50:55,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:55,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:50:55,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:55,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620997988] [2023-11-06 22:50:55,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620997988] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:50:55,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137523894] [2023-11-06 22:50:55,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:50:55,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:50:55,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:50:55,422 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:50:55,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:50:55,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:50:55,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:50:55,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 22:50:55,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:50:55,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:50:55,543 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 22:50:55,602 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:50:55,662 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:50:55,818 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:50:56,026 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:50:56,027 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 130 [2023-11-06 22:50:56,117 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 22:50:56,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:50:59,453 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:50:59,454 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 91 [2023-11-06 22:50:59,493 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:50:59,494 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 396 treesize of output 356 [2023-11-06 22:50:59,531 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:50:59,531 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 188 [2023-11-06 22:50:59,582 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:50:59,583 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 105 [2023-11-06 22:51:00,397 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 22:51:00,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137523894] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:00,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:51:00,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-11-06 22:51:00,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863394683] [2023-11-06 22:51:00,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:00,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:51:00,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:00,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:51:00,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=386, Unknown=1, NotChecked=0, Total=462 [2023-11-06 22:51:02,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:04,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:06,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:08,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:10,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:12,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:14,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:16,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:18,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:21,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:23,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:25,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:27,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:29,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:31,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:31,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 448 [2023-11-06 22:51:31,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 168 transitions, 1975 flow. Second operand has 22 states, 22 states have (on average 113.18181818181819) internal successors, (2490), 22 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:31,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:51:31,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 448 [2023-11-06 22:51:31,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:51:36,805 INFO L124 PetriNetUnfolderBase]: 628/1295 cut-off events. [2023-11-06 22:51:36,805 INFO L125 PetriNetUnfolderBase]: For 8772/8772 co-relation queries the response was YES. [2023-11-06 22:51:36,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7529 conditions, 1295 events. 628/1295 cut-off events. For 8772/8772 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7969 event pairs, 85 based on Foata normal form. 13/1301 useless extension candidates. Maximal degree in co-relation 7303. Up to 651 conditions per place. [2023-11-06 22:51:36,823 INFO L140 encePairwiseOnDemand]: 437/448 looper letters, 132 selfloop transitions, 103 changer transitions 79/314 dead transitions. [2023-11-06 22:51:36,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 314 transitions, 3654 flow [2023-11-06 22:51:36,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:51:36,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 22:51:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3758 transitions. [2023-11-06 22:51:36,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2621372767857143 [2023-11-06 22:51:36,832 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3758 transitions. [2023-11-06 22:51:36,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3758 transitions. [2023-11-06 22:51:36,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:51:36,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3758 transitions. [2023-11-06 22:51:36,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 117.4375) internal successors, (3758), 32 states have internal predecessors, (3758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:36,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 448.0) internal successors, (14784), 33 states have internal predecessors, (14784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:36,858 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 448.0) internal successors, (14784), 33 states have internal predecessors, (14784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:36,873 INFO L175 Difference]: Start difference. First operand has 155 places, 168 transitions, 1975 flow. Second operand 32 states and 3758 transitions. [2023-11-06 22:51:36,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 314 transitions, 3654 flow [2023-11-06 22:51:37,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 314 transitions, 3375 flow, removed 89 selfloop flow, removed 13 redundant places. [2023-11-06 22:51:37,011 INFO L231 Difference]: Finished difference. Result has 180 places, 157 transitions, 1958 flow [2023-11-06 22:51:37,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1958, PETRI_PLACES=180, PETRI_TRANSITIONS=157} [2023-11-06 22:51:37,012 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 159 predicate places. [2023-11-06 22:51:37,013 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 157 transitions, 1958 flow [2023-11-06 22:51:37,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 113.18181818181819) internal successors, (2490), 22 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:37,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:51:37,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:51:37,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:51:37,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:51:37,214 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 22:51:37,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:51:37,215 INFO L85 PathProgramCache]: Analyzing trace with hash 113822554, now seen corresponding path program 5 times [2023-11-06 22:51:37,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:51:37,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343956687] [2023-11-06 22:51:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:51:37,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:51:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:51:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:51:37,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:51:37,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343956687] [2023-11-06 22:51:37,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343956687] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:51:37,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635353548] [2023-11-06 22:51:37,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:51:37,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:51:37,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:51:37,445 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:51:37,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:51:37,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:51:37,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:51:37,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 22:51:37,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:51:37,628 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:51:37,691 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:51:37,742 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:51:38,135 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 22:51:38,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:51:40,135 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:51:40,136 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 94 [2023-11-06 22:51:40,168 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:51:40,168 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 262 [2023-11-06 22:51:40,215 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:51:40,216 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 222 treesize of output 202 [2023-11-06 22:51:40,264 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:51:40,264 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 105 [2023-11-06 22:51:41,218 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 22:51:41,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635353548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:51:41,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:51:41,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-11-06 22:51:41,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702974305] [2023-11-06 22:51:41,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:51:41,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:51:41,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:51:41,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:51:41,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=375, Unknown=1, NotChecked=0, Total=462 [2023-11-06 22:51:44,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:46,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:49,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:51,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:53,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:56,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:58,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:51:58,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 448 [2023-11-06 22:51:58,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 157 transitions, 1958 flow. Second operand has 22 states, 22 states have (on average 113.18181818181819) internal successors, (2490), 22 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:51:58,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:51:58,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 448 [2023-11-06 22:51:58,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:02,040 INFO L124 PetriNetUnfolderBase]: 519/1084 cut-off events. [2023-11-06 22:52:02,040 INFO L125 PetriNetUnfolderBase]: For 8012/8012 co-relation queries the response was YES. [2023-11-06 22:52:02,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6594 conditions, 1084 events. 519/1084 cut-off events. For 8012/8012 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6441 event pairs, 9 based on Foata normal form. 6/1089 useless extension candidates. Maximal degree in co-relation 6412. Up to 510 conditions per place. [2023-11-06 22:52:02,054 INFO L140 encePairwiseOnDemand]: 437/448 looper letters, 149 selfloop transitions, 133 changer transitions 17/299 dead transitions. [2023-11-06 22:52:02,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 299 transitions, 3655 flow [2023-11-06 22:52:02,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 22:52:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-06 22:52:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4401 transitions. [2023-11-06 22:52:02,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2585173872180451 [2023-11-06 22:52:02,065 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4401 transitions. [2023-11-06 22:52:02,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4401 transitions. [2023-11-06 22:52:02,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:02,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4401 transitions. [2023-11-06 22:52:02,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 115.8157894736842) internal successors, (4401), 38 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:02,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 448.0) internal successors, (17472), 39 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:02,096 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 448.0) internal successors, (17472), 39 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:02,096 INFO L175 Difference]: Start difference. First operand has 180 places, 157 transitions, 1958 flow. Second operand 38 states and 4401 transitions. [2023-11-06 22:52:02,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 299 transitions, 3655 flow [2023-11-06 22:52:02,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 299 transitions, 3253 flow, removed 131 selfloop flow, removed 32 redundant places. [2023-11-06 22:52:02,157 INFO L231 Difference]: Finished difference. Result has 186 places, 197 transitions, 2619 flow [2023-11-06 22:52:02,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2619, PETRI_PLACES=186, PETRI_TRANSITIONS=197} [2023-11-06 22:52:02,158 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 165 predicate places. [2023-11-06 22:52:02,159 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 197 transitions, 2619 flow [2023-11-06 22:52:02,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 113.18181818181819) internal successors, (2490), 22 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:02,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:02,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:02,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:02,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:52:02,370 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 22:52:02,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:02,370 INFO L85 PathProgramCache]: Analyzing trace with hash -265950534, now seen corresponding path program 6 times [2023-11-06 22:52:02,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:02,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904755994] [2023-11-06 22:52:02,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:02,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:02,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:02,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904755994] [2023-11-06 22:52:02,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904755994] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:02,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770991607] [2023-11-06 22:52:02,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:52:02,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:02,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:02,582 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:02,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:52:02,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:52:02,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:02,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:52:02,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:03,159 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 22:52:03,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:03,308 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:03,308 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 188 treesize of output 188 [2023-11-06 22:52:04,607 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 22:52:04,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770991607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:04,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:04,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-06 22:52:04,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49471193] [2023-11-06 22:52:04,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:04,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:52:04,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:04,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:52:04,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:52:06,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 448 [2023-11-06 22:52:06,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 197 transitions, 2619 flow. Second operand has 18 states, 18 states have (on average 156.66666666666666) internal successors, (2820), 18 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 22:52:06,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:06,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 448 [2023-11-06 22:52:06,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:07,074 INFO L124 PetriNetUnfolderBase]: 512/1069 cut-off events. [2023-11-06 22:52:07,074 INFO L125 PetriNetUnfolderBase]: For 7590/7590 co-relation queries the response was YES. [2023-11-06 22:52:07,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6793 conditions, 1069 events. 512/1069 cut-off events. For 7590/7590 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6211 event pairs, 30 based on Foata normal form. 4/1072 useless extension candidates. Maximal degree in co-relation 6738. Up to 630 conditions per place. [2023-11-06 22:52:07,094 INFO L140 encePairwiseOnDemand]: 439/448 looper letters, 153 selfloop transitions, 72 changer transitions 6/231 dead transitions. [2023-11-06 22:52:07,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 231 transitions, 3324 flow [2023-11-06 22:52:07,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:52:07,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:52:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2383 transitions. [2023-11-06 22:52:07,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35461309523809526 [2023-11-06 22:52:07,101 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2383 transitions. [2023-11-06 22:52:07,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2383 transitions. [2023-11-06 22:52:07,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:07,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2383 transitions. [2023-11-06 22:52:07,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 158.86666666666667) internal successors, (2383), 15 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:07,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 448.0) internal successors, (7168), 16 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:07,115 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 448.0) internal successors, (7168), 16 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:07,115 INFO L175 Difference]: Start difference. First operand has 186 places, 197 transitions, 2619 flow. Second operand 15 states and 2383 transitions. [2023-11-06 22:52:07,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 231 transitions, 3324 flow [2023-11-06 22:52:07,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 231 transitions, 3055 flow, removed 64 selfloop flow, removed 27 redundant places. [2023-11-06 22:52:07,240 INFO L231 Difference]: Finished difference. Result has 169 places, 194 transitions, 2484 flow [2023-11-06 22:52:07,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2484, PETRI_PLACES=169, PETRI_TRANSITIONS=194} [2023-11-06 22:52:07,242 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 148 predicate places. [2023-11-06 22:52:07,242 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 194 transitions, 2484 flow [2023-11-06 22:52:07,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 156.66666666666666) internal successors, (2820), 18 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 22:52:07,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:07,243 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:07,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:07,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:52:07,449 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 22:52:07,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:07,450 INFO L85 PathProgramCache]: Analyzing trace with hash -2009702174, now seen corresponding path program 2 times [2023-11-06 22:52:07,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:07,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940897343] [2023-11-06 22:52:07,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:07,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:07,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:07,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940897343] [2023-11-06 22:52:07,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940897343] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:07,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649027511] [2023-11-06 22:52:07,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:52:07,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:07,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:07,714 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:07,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:52:07,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:52:07,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:07,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:52:07,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:07,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:08,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649027511] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:08,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:08,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:52:08,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129906638] [2023-11-06 22:52:08,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:08,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:52:08,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:08,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:52:08,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:52:08,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 448 [2023-11-06 22:52:08,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 194 transitions, 2484 flow. Second operand has 12 states, 12 states have (on average 175.33333333333334) internal successors, (2104), 12 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:08,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:08,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 448 [2023-11-06 22:52:08,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:09,413 INFO L124 PetriNetUnfolderBase]: 508/1061 cut-off events. [2023-11-06 22:52:09,413 INFO L125 PetriNetUnfolderBase]: For 7110/7110 co-relation queries the response was YES. [2023-11-06 22:52:09,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6468 conditions, 1061 events. 508/1061 cut-off events. For 7110/7110 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6198 event pairs, 65 based on Foata normal form. 16/1076 useless extension candidates. Maximal degree in co-relation 6421. Up to 492 conditions per place. [2023-11-06 22:52:09,425 INFO L140 encePairwiseOnDemand]: 442/448 looper letters, 147 selfloop transitions, 108 changer transitions 0/255 dead transitions. [2023-11-06 22:52:09,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 255 transitions, 3425 flow [2023-11-06 22:52:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:52:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:52:09,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2863 transitions. [2023-11-06 22:52:09,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994140625 [2023-11-06 22:52:09,431 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2863 transitions. [2023-11-06 22:52:09,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2863 transitions. [2023-11-06 22:52:09,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:09,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2863 transitions. [2023-11-06 22:52:09,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 178.9375) internal successors, (2863), 16 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:09,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 448.0) internal successors, (7616), 17 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:09,446 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 448.0) internal successors, (7616), 17 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:09,446 INFO L175 Difference]: Start difference. First operand has 169 places, 194 transitions, 2484 flow. Second operand 16 states and 2863 transitions. [2023-11-06 22:52:09,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 255 transitions, 3425 flow [2023-11-06 22:52:09,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 255 transitions, 3314 flow, removed 5 selfloop flow, removed 9 redundant places. [2023-11-06 22:52:09,500 INFO L231 Difference]: Finished difference. Result has 171 places, 202 transitions, 2731 flow [2023-11-06 22:52:09,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=2358, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2731, PETRI_PLACES=171, PETRI_TRANSITIONS=202} [2023-11-06 22:52:09,501 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 150 predicate places. [2023-11-06 22:52:09,501 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 202 transitions, 2731 flow [2023-11-06 22:52:09,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 175.33333333333334) internal successors, (2104), 12 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:09,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:09,502 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:09,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:09,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:52:09,718 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 22:52:09,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:09,718 INFO L85 PathProgramCache]: Analyzing trace with hash -523073820, now seen corresponding path program 3 times [2023-11-06 22:52:09,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:09,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773023163] [2023-11-06 22:52:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:09,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:10,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:10,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773023163] [2023-11-06 22:52:10,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773023163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:10,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76318751] [2023-11-06 22:52:10,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:52:10,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:10,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:10,098 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:10,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:52:10,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:52:10,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:10,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:52:10,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:10,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:10,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76318751] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:10,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:10,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:52:10,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746870866] [2023-11-06 22:52:10,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:10,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:52:10,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:10,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:52:10,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:52:10,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 448 [2023-11-06 22:52:10,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 202 transitions, 2731 flow. Second operand has 12 states, 12 states have (on average 175.0) internal successors, (2100), 12 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:10,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:10,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 448 [2023-11-06 22:52:10,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:12,124 INFO L124 PetriNetUnfolderBase]: 582/1177 cut-off events. [2023-11-06 22:52:12,124 INFO L125 PetriNetUnfolderBase]: For 9266/9266 co-relation queries the response was YES. [2023-11-06 22:52:12,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7620 conditions, 1177 events. 582/1177 cut-off events. For 9266/9266 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6903 event pairs, 115 based on Foata normal form. 12/1188 useless extension candidates. Maximal degree in co-relation 7570. Up to 567 conditions per place. [2023-11-06 22:52:12,139 INFO L140 encePairwiseOnDemand]: 442/448 looper letters, 181 selfloop transitions, 106 changer transitions 0/287 dead transitions. [2023-11-06 22:52:12,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 287 transitions, 4019 flow [2023-11-06 22:52:12,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:52:12,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:52:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3059 transitions. [2023-11-06 22:52:12,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4016544117647059 [2023-11-06 22:52:12,147 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3059 transitions. [2023-11-06 22:52:12,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3059 transitions. [2023-11-06 22:52:12,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:12,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3059 transitions. [2023-11-06 22:52:12,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 179.94117647058823) internal successors, (3059), 17 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:12,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 448.0) internal successors, (8064), 18 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:12,163 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 448.0) internal successors, (8064), 18 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:12,163 INFO L175 Difference]: Start difference. First operand has 171 places, 202 transitions, 2731 flow. Second operand 17 states and 3059 transitions. [2023-11-06 22:52:12,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 287 transitions, 4019 flow [2023-11-06 22:52:12,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 287 transitions, 3735 flow, removed 39 selfloop flow, removed 11 redundant places. [2023-11-06 22:52:12,233 INFO L231 Difference]: Finished difference. Result has 182 places, 226 transitions, 3187 flow [2023-11-06 22:52:12,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3187, PETRI_PLACES=182, PETRI_TRANSITIONS=226} [2023-11-06 22:52:12,234 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 161 predicate places. [2023-11-06 22:52:12,234 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 226 transitions, 3187 flow [2023-11-06 22:52:12,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 175.0) internal successors, (2100), 12 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:12,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:12,235 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:12,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:12,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:12,441 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 22:52:12,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:12,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1596672646, now seen corresponding path program 7 times [2023-11-06 22:52:12,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:12,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357540986] [2023-11-06 22:52:12,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:12,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:12,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:12,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357540986] [2023-11-06 22:52:12,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357540986] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:12,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017561085] [2023-11-06 22:52:12,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:52:12,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:12,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:12,684 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:12,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:52:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:12,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:52:12,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:13,101 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:13,102 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2023-11-06 22:52:13,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:13,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:13,419 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:13,420 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 188 treesize of output 188 [2023-11-06 22:52:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:15,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017561085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:15,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:15,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-11-06 22:52:15,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551750497] [2023-11-06 22:52:15,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:15,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:52:15,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:15,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:52:15,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:52:16,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 448 [2023-11-06 22:52:16,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 226 transitions, 3187 flow. Second operand has 17 states, 17 states have (on average 159.1764705882353) internal successors, (2706), 17 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:16,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:16,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 448 [2023-11-06 22:52:16,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:17,906 INFO L124 PetriNetUnfolderBase]: 585/1188 cut-off events. [2023-11-06 22:52:17,906 INFO L125 PetriNetUnfolderBase]: For 10100/10100 co-relation queries the response was YES. [2023-11-06 22:52:17,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7836 conditions, 1188 events. 585/1188 cut-off events. For 10100/10100 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6963 event pairs, 32 based on Foata normal form. 4/1191 useless extension candidates. Maximal degree in co-relation 7783. Up to 589 conditions per place. [2023-11-06 22:52:17,924 INFO L140 encePairwiseOnDemand]: 438/448 looper letters, 165 selfloop transitions, 102 changer transitions 9/276 dead transitions. [2023-11-06 22:52:17,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 276 transitions, 4058 flow [2023-11-06 22:52:17,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:52:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:52:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3085 transitions. [2023-11-06 22:52:17,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3624295112781955 [2023-11-06 22:52:17,931 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3085 transitions. [2023-11-06 22:52:17,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3085 transitions. [2023-11-06 22:52:17,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:17,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3085 transitions. [2023-11-06 22:52:17,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 162.3684210526316) internal successors, (3085), 19 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:17,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 448.0) internal successors, (8960), 20 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:17,984 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 448.0) internal successors, (8960), 20 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:17,985 INFO L175 Difference]: Start difference. First operand has 182 places, 226 transitions, 3187 flow. Second operand 19 states and 3085 transitions. [2023-11-06 22:52:17,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 276 transitions, 4058 flow [2023-11-06 22:52:18,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 276 transitions, 3798 flow, removed 96 selfloop flow, removed 7 redundant places. [2023-11-06 22:52:18,059 INFO L231 Difference]: Finished difference. Result has 197 places, 228 transitions, 3247 flow [2023-11-06 22:52:18,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=2933, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3247, PETRI_PLACES=197, PETRI_TRANSITIONS=228} [2023-11-06 22:52:18,061 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 176 predicate places. [2023-11-06 22:52:18,061 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 228 transitions, 3247 flow [2023-11-06 22:52:18,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 159.1764705882353) internal successors, (2706), 17 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:18,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:18,062 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:18,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:18,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:18,268 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 22:52:18,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:18,268 INFO L85 PathProgramCache]: Analyzing trace with hash 650671518, now seen corresponding path program 4 times [2023-11-06 22:52:18,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:18,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785183261] [2023-11-06 22:52:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:18,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:18,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:18,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785183261] [2023-11-06 22:52:18,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785183261] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:18,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751571000] [2023-11-06 22:52:18,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:52:18,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:18,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:18,507 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:18,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:52:18,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:52:18,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:18,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:52:18,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:18,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:18,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751571000] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:18,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:18,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-06 22:52:18,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852256941] [2023-11-06 22:52:18,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:18,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:52:18,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:18,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:52:18,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:52:19,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 448 [2023-11-06 22:52:19,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 228 transitions, 3247 flow. Second operand has 11 states, 11 states have (on average 176.27272727272728) internal successors, (1939), 11 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:19,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:19,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 448 [2023-11-06 22:52:19,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:20,629 INFO L124 PetriNetUnfolderBase]: 743/1420 cut-off events. [2023-11-06 22:52:20,629 INFO L125 PetriNetUnfolderBase]: For 13013/13013 co-relation queries the response was YES. [2023-11-06 22:52:20,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9955 conditions, 1420 events. 743/1420 cut-off events. For 13013/13013 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8176 event pairs, 72 based on Foata normal form. 20/1440 useless extension candidates. Maximal degree in co-relation 9900. Up to 563 conditions per place. [2023-11-06 22:52:20,643 INFO L140 encePairwiseOnDemand]: 442/448 looper letters, 177 selfloop transitions, 150 changer transitions 0/327 dead transitions. [2023-11-06 22:52:20,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 327 transitions, 4986 flow [2023-11-06 22:52:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:52:20,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:52:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2882 transitions. [2023-11-06 22:52:20,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40206473214285715 [2023-11-06 22:52:20,650 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2882 transitions. [2023-11-06 22:52:20,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2882 transitions. [2023-11-06 22:52:20,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:20,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2882 transitions. [2023-11-06 22:52:20,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 180.125) internal successors, (2882), 16 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:20,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 448.0) internal successors, (7616), 17 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:20,665 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 448.0) internal successors, (7616), 17 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:20,665 INFO L175 Difference]: Start difference. First operand has 197 places, 228 transitions, 3247 flow. Second operand 16 states and 2882 transitions. [2023-11-06 22:52:20,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 327 transitions, 4986 flow [2023-11-06 22:52:20,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 327 transitions, 4779 flow, removed 57 selfloop flow, removed 14 redundant places. [2023-11-06 22:52:20,776 INFO L231 Difference]: Finished difference. Result has 200 places, 266 transitions, 4105 flow [2023-11-06 22:52:20,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=3090, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4105, PETRI_PLACES=200, PETRI_TRANSITIONS=266} [2023-11-06 22:52:20,777 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 179 predicate places. [2023-11-06 22:52:20,777 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 266 transitions, 4105 flow [2023-11-06 22:52:20,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 176.27272727272728) internal successors, (1939), 11 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:20,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:20,778 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:20,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:20,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:52:20,985 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 22:52:20,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:20,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1496486850, now seen corresponding path program 5 times [2023-11-06 22:52:20,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:20,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748380309] [2023-11-06 22:52:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:20,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:21,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:21,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748380309] [2023-11-06 22:52:21,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748380309] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:21,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254109989] [2023-11-06 22:52:21,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:52:21,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:21,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:21,386 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:21,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:52:21,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:52:21,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:21,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:52:21,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:21,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:21,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254109989] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:21,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:21,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-06 22:52:21,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279077806] [2023-11-06 22:52:21,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:21,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:52:21,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:21,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:52:21,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:52:22,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 448 [2023-11-06 22:52:22,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 266 transitions, 4105 flow. Second operand has 13 states, 13 states have (on average 174.92307692307693) internal successors, (2274), 13 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:22,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:22,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 448 [2023-11-06 22:52:22,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:24,433 INFO L124 PetriNetUnfolderBase]: 1107/2156 cut-off events. [2023-11-06 22:52:24,433 INFO L125 PetriNetUnfolderBase]: For 21952/21952 co-relation queries the response was YES. [2023-11-06 22:52:24,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15556 conditions, 2156 events. 1107/2156 cut-off events. For 21952/21952 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13757 event pairs, 48 based on Foata normal form. 8/2163 useless extension candidates. Maximal degree in co-relation 15501. Up to 773 conditions per place. [2023-11-06 22:52:24,458 INFO L140 encePairwiseOnDemand]: 441/448 looper letters, 251 selfloop transitions, 226 changer transitions 0/477 dead transitions. [2023-11-06 22:52:24,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 477 transitions, 7805 flow [2023-11-06 22:52:24,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:52:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:52:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3250 transitions. [2023-11-06 22:52:24,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40302579365079366 [2023-11-06 22:52:24,464 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3250 transitions. [2023-11-06 22:52:24,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3250 transitions. [2023-11-06 22:52:24,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:24,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3250 transitions. [2023-11-06 22:52:24,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 180.55555555555554) internal successors, (3250), 18 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:24,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 448.0) internal successors, (8512), 19 states have internal predecessors, (8512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:24,482 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 448.0) internal successors, (8512), 19 states have internal predecessors, (8512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:24,482 INFO L175 Difference]: Start difference. First operand has 200 places, 266 transitions, 4105 flow. Second operand 18 states and 3250 transitions. [2023-11-06 22:52:24,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 477 transitions, 7805 flow [2023-11-06 22:52:24,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 477 transitions, 7455 flow, removed 131 selfloop flow, removed 9 redundant places. [2023-11-06 22:52:24,637 INFO L231 Difference]: Finished difference. Result has 218 places, 358 transitions, 6155 flow [2023-11-06 22:52:24,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=3885, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6155, PETRI_PLACES=218, PETRI_TRANSITIONS=358} [2023-11-06 22:52:24,638 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 197 predicate places. [2023-11-06 22:52:24,639 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 358 transitions, 6155 flow [2023-11-06 22:52:24,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 174.92307692307693) internal successors, (2274), 13 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:24,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:24,640 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:24,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-06 22:52:24,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:24,846 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 22:52:24,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:24,847 INFO L85 PathProgramCache]: Analyzing trace with hash 170917244, now seen corresponding path program 8 times [2023-11-06 22:52:24,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:24,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261999715] [2023-11-06 22:52:24,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:24,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:25,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:25,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261999715] [2023-11-06 22:52:25,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261999715] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:25,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263173689] [2023-11-06 22:52:25,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:52:25,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:25,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:25,126 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:25,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:52:25,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:52:25,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:25,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:52:25,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:25,657 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:25,657 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 135 [2023-11-06 22:52:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:25,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:26,568 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:26,568 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 176 treesize of output 145 [2023-11-06 22:52:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:27,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263173689] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:27,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:27,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-11-06 22:52:27,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593594079] [2023-11-06 22:52:27,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:27,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:52:27,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:27,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:52:27,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:52:29,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 448 [2023-11-06 22:52:29,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 358 transitions, 6155 flow. Second operand has 17 states, 17 states have (on average 159.1764705882353) internal successors, (2706), 17 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:29,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:29,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 448 [2023-11-06 22:52:29,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:33,466 INFO L124 PetriNetUnfolderBase]: 1133/2206 cut-off events. [2023-11-06 22:52:33,466 INFO L125 PetriNetUnfolderBase]: For 26395/26395 co-relation queries the response was YES. [2023-11-06 22:52:33,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16758 conditions, 2206 events. 1133/2206 cut-off events. For 26395/26395 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 14112 event pairs, 72 based on Foata normal form. 5/2210 useless extension candidates. Maximal degree in co-relation 16695. Up to 1419 conditions per place. [2023-11-06 22:52:33,498 INFO L140 encePairwiseOnDemand]: 439/448 looper letters, 277 selfloop transitions, 157 changer transitions 11/445 dead transitions. [2023-11-06 22:52:33,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 445 transitions, 7736 flow [2023-11-06 22:52:33,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:52:33,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:52:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3269 transitions. [2023-11-06 22:52:33,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36484375 [2023-11-06 22:52:33,504 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3269 transitions. [2023-11-06 22:52:33,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3269 transitions. [2023-11-06 22:52:33,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:33,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3269 transitions. [2023-11-06 22:52:33,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 163.45) internal successors, (3269), 20 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:33,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 448.0) internal successors, (9408), 21 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:33,521 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 448.0) internal successors, (9408), 21 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:33,521 INFO L175 Difference]: Start difference. First operand has 218 places, 358 transitions, 6155 flow. Second operand 20 states and 3269 transitions. [2023-11-06 22:52:33,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 445 transitions, 7736 flow [2023-11-06 22:52:33,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 445 transitions, 7376 flow, removed 103 selfloop flow, removed 4 redundant places. [2023-11-06 22:52:33,738 INFO L231 Difference]: Finished difference. Result has 240 places, 371 transitions, 6392 flow [2023-11-06 22:52:33,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=5786, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6392, PETRI_PLACES=240, PETRI_TRANSITIONS=371} [2023-11-06 22:52:33,739 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 219 predicate places. [2023-11-06 22:52:33,740 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 371 transitions, 6392 flow [2023-11-06 22:52:33,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 159.1764705882353) internal successors, (2706), 17 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:33,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:33,741 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:33,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-06 22:52:33,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:52:33,946 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 22:52:33,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:33,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1164469458, now seen corresponding path program 6 times [2023-11-06 22:52:33,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:33,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570343378] [2023-11-06 22:52:33,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:33,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:34,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:34,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570343378] [2023-11-06 22:52:34,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570343378] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:34,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114242435] [2023-11-06 22:52:34,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:52:34,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:34,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:34,255 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:34,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:52:34,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:52:34,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:34,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:52:34,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:34,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:34,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114242435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:34,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:34,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:52:34,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118728013] [2023-11-06 22:52:34,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:34,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:52:34,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:34,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:52:34,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:52:35,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 448 [2023-11-06 22:52:35,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 371 transitions, 6392 flow. Second operand has 12 states, 12 states have (on average 176.33333333333334) internal successors, (2116), 12 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:35,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:35,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 448 [2023-11-06 22:52:35,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:36,691 INFO L124 PetriNetUnfolderBase]: 1234/2387 cut-off events. [2023-11-06 22:52:36,691 INFO L125 PetriNetUnfolderBase]: For 29648/29648 co-relation queries the response was YES. [2023-11-06 22:52:36,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18370 conditions, 2387 events. 1234/2387 cut-off events. For 29648/29648 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15439 event pairs, 228 based on Foata normal form. 32/2419 useless extension candidates. Maximal degree in co-relation 18300. Up to 1475 conditions per place. [2023-11-06 22:52:36,725 INFO L140 encePairwiseOnDemand]: 442/448 looper letters, 282 selfloop transitions, 188 changer transitions 0/470 dead transitions. [2023-11-06 22:52:36,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 470 transitions, 8463 flow [2023-11-06 22:52:36,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:52:36,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:52:36,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3240 transitions. [2023-11-06 22:52:36,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2023-11-06 22:52:36,783 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3240 transitions. [2023-11-06 22:52:36,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3240 transitions. [2023-11-06 22:52:36,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:36,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3240 transitions. [2023-11-06 22:52:36,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 180.0) internal successors, (3240), 18 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:36,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 448.0) internal successors, (8512), 19 states have internal predecessors, (8512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:36,801 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 448.0) internal successors, (8512), 19 states have internal predecessors, (8512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:36,802 INFO L175 Difference]: Start difference. First operand has 240 places, 371 transitions, 6392 flow. Second operand 18 states and 3240 transitions. [2023-11-06 22:52:36,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 470 transitions, 8463 flow [2023-11-06 22:52:36,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 470 transitions, 8296 flow, removed 37 selfloop flow, removed 9 redundant places. [2023-11-06 22:52:37,008 INFO L231 Difference]: Finished difference. Result has 252 places, 405 transitions, 7506 flow [2023-11-06 22:52:37,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=6153, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7506, PETRI_PLACES=252, PETRI_TRANSITIONS=405} [2023-11-06 22:52:37,009 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 231 predicate places. [2023-11-06 22:52:37,009 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 405 transitions, 7506 flow [2023-11-06 22:52:37,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.33333333333334) internal successors, (2116), 12 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:37,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:37,011 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:37,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:37,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:37,212 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 22:52:37,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:37,212 INFO L85 PathProgramCache]: Analyzing trace with hash -677453602, now seen corresponding path program 7 times [2023-11-06 22:52:37,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:37,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769430645] [2023-11-06 22:52:37,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:37,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:37,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:37,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769430645] [2023-11-06 22:52:37,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769430645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:37,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21915347] [2023-11-06 22:52:37,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:52:37,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:37,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:37,438 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:37,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:52:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:37,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:52:37,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:37,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:37,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21915347] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:37,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:37,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-06 22:52:37,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116476761] [2023-11-06 22:52:37,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:37,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:52:37,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:37,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:52:37,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:52:38,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 448 [2023-11-06 22:52:38,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 405 transitions, 7506 flow. Second operand has 13 states, 13 states have (on average 174.92307692307693) internal successors, (2274), 13 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:38,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:38,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 448 [2023-11-06 22:52:38,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:39,881 INFO L124 PetriNetUnfolderBase]: 1231/2366 cut-off events. [2023-11-06 22:52:39,881 INFO L125 PetriNetUnfolderBase]: For 32406/32406 co-relation queries the response was YES. [2023-11-06 22:52:39,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19085 conditions, 2366 events. 1231/2366 cut-off events. For 32406/32406 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15151 event pairs, 58 based on Foata normal form. 6/2371 useless extension candidates. Maximal degree in co-relation 19012. Up to 917 conditions per place. [2023-11-06 22:52:39,906 INFO L140 encePairwiseOnDemand]: 442/448 looper letters, 246 selfloop transitions, 239 changer transitions 0/485 dead transitions. [2023-11-06 22:52:39,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 485 transitions, 9383 flow [2023-11-06 22:52:39,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:52:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:52:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2700 transitions. [2023-11-06 22:52:39,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2023-11-06 22:52:39,911 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2700 transitions. [2023-11-06 22:52:39,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2700 transitions. [2023-11-06 22:52:39,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:39,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2700 transitions. [2023-11-06 22:52:39,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 180.0) internal successors, (2700), 15 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:39,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 448.0) internal successors, (7168), 16 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:39,923 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 448.0) internal successors, (7168), 16 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:39,923 INFO L175 Difference]: Start difference. First operand has 252 places, 405 transitions, 7506 flow. Second operand 15 states and 2700 transitions. [2023-11-06 22:52:39,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 485 transitions, 9383 flow [2023-11-06 22:52:40,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 485 transitions, 9139 flow, removed 62 selfloop flow, removed 11 redundant places. [2023-11-06 22:52:40,181 INFO L231 Difference]: Finished difference. Result has 258 places, 412 transitions, 7945 flow [2023-11-06 22:52:40,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=7257, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7945, PETRI_PLACES=258, PETRI_TRANSITIONS=412} [2023-11-06 22:52:40,182 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 237 predicate places. [2023-11-06 22:52:40,182 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 412 transitions, 7945 flow [2023-11-06 22:52:40,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 174.92307692307693) internal successors, (2274), 13 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:40,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:40,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:40,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:40,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:40,389 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 22:52:40,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:40,389 INFO L85 PathProgramCache]: Analyzing trace with hash 147936736, now seen corresponding path program 8 times [2023-11-06 22:52:40,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:40,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515688051] [2023-11-06 22:52:40,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:40,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:40,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:40,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515688051] [2023-11-06 22:52:40,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515688051] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:40,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908073342] [2023-11-06 22:52:40,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:52:40,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:40,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:40,758 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:40,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:52:40,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:52:40,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:40,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:52:40,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:41,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:41,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908073342] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:41,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:41,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-06 22:52:41,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184018015] [2023-11-06 22:52:41,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:41,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:52:41,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:41,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:52:41,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:52:41,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 448 [2023-11-06 22:52:41,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 412 transitions, 7945 flow. Second operand has 13 states, 13 states have (on average 176.23076923076923) internal successors, (2291), 13 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:41,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:41,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 448 [2023-11-06 22:52:41,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:43,516 INFO L124 PetriNetUnfolderBase]: 1221/2348 cut-off events. [2023-11-06 22:52:43,516 INFO L125 PetriNetUnfolderBase]: For 36033/36033 co-relation queries the response was YES. [2023-11-06 22:52:43,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19638 conditions, 2348 events. 1221/2348 cut-off events. For 36033/36033 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 14968 event pairs, 52 based on Foata normal form. 16/2363 useless extension candidates. Maximal degree in co-relation 19562. Up to 853 conditions per place. [2023-11-06 22:52:43,546 INFO L140 encePairwiseOnDemand]: 441/448 looper letters, 241 selfloop transitions, 277 changer transitions 0/518 dead transitions. [2023-11-06 22:52:43,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 518 transitions, 10049 flow [2023-11-06 22:52:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:52:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:52:43,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4316 transitions. [2023-11-06 22:52:43,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40141369047619047 [2023-11-06 22:52:43,557 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4316 transitions. [2023-11-06 22:52:43,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4316 transitions. [2023-11-06 22:52:43,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:43,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4316 transitions. [2023-11-06 22:52:43,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 179.83333333333334) internal successors, (4316), 24 states have internal predecessors, (4316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:43,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 448.0) internal successors, (11200), 25 states have internal predecessors, (11200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:43,576 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 448.0) internal successors, (11200), 25 states have internal predecessors, (11200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:43,576 INFO L175 Difference]: Start difference. First operand has 258 places, 412 transitions, 7945 flow. Second operand 24 states and 4316 transitions. [2023-11-06 22:52:43,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 518 transitions, 10049 flow [2023-11-06 22:52:43,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 518 transitions, 9783 flow, removed 38 selfloop flow, removed 8 redundant places. [2023-11-06 22:52:43,810 INFO L231 Difference]: Finished difference. Result has 277 places, 415 transitions, 8347 flow [2023-11-06 22:52:43,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=7597, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8347, PETRI_PLACES=277, PETRI_TRANSITIONS=415} [2023-11-06 22:52:43,811 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 256 predicate places. [2023-11-06 22:52:43,811 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 415 transitions, 8347 flow [2023-11-06 22:52:43,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 176.23076923076923) internal successors, (2291), 13 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:52:43,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:43,812 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:43,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:44,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:44,012 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 22:52:44,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:44,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1304679534, now seen corresponding path program 9 times [2023-11-06 22:52:44,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:44,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40084706] [2023-11-06 22:52:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:44,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:44,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:44,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40084706] [2023-11-06 22:52:44,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40084706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:44,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325398187] [2023-11-06 22:52:44,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:52:44,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:44,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:44,362 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:44,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30cc4840-4e78-4a38-a007-65eb140b152a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:52:44,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:52:44,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:44,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 22:52:44,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:44,601 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:52:44,647 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:52:44,700 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:52:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:45,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:47,701 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:47,702 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 94 [2023-11-06 22:52:47,736 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:47,737 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 556 treesize of output 516 [2023-11-06 22:52:47,785 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:47,785 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 108 [2023-11-06 22:52:47,824 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:47,824 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 105 [2023-11-06 22:52:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:48,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325398187] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:48,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:48,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-11-06 22:52:48,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510479617] [2023-11-06 22:52:48,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:48,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:52:48,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:48,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:52:48,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=491, Unknown=3, NotChecked=0, Total=600 [2023-11-06 22:52:51,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:52:54,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:52:56,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:52:59,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:53:03,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:53:05,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:53:07,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:53:07,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 448 [2023-11-06 22:53:07,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 415 transitions, 8347 flow. Second operand has 25 states, 25 states have (on average 113.16) internal successors, (2829), 25 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:53:07,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:07,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 448 [2023-11-06 22:53:07,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:53:12,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:53:19,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]