./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/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_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/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_7c4a125f-44a6-4b74-bd27-22c7035da401/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 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:17:48,896 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:17:49,006 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:17:49,019 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:17:49,020 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:17:49,053 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:17:49,055 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:17:49,055 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:17:49,056 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:17:49,059 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:17:49,060 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:17:49,061 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:17:49,061 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:17:49,062 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:17:49,062 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:17:49,062 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:17:49,063 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:17:49,063 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:17:49,064 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:17:49,064 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:17:49,065 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:17:49,065 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:17:49,066 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:17:49,066 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:17:49,067 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:17:49,067 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:17:49,067 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:17:49,068 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:17:49,069 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:17:49,069 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:17:49,071 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:17:49,071 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:17:49,071 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:17:49,071 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:17:49,072 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:17:49,072 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:17:49,072 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:17:49,072 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:17:49,073 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:17:49,073 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_7c4a125f-44a6-4b74-bd27-22c7035da401/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf [2023-11-06 22:17:49,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:17:49,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:17:49,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:17:49,426 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:17:49,427 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:17:49,429 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/unroll-2.wvr.c [2023-11-06 22:17:52,586 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:17:52,818 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:17:52,819 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/sv-benchmarks/c/weaver/unroll-2.wvr.c [2023-11-06 22:17:52,827 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/data/08abbee88/e509149fa18c410fb7c8fa486af3d9ae/FLAGede6f6f77 [2023-11-06 22:17:52,841 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/data/08abbee88/e509149fa18c410fb7c8fa486af3d9ae [2023-11-06 22:17:52,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:17:52,845 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:17:52,846 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:17:52,846 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:17:52,852 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:17:52,857 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:17:52" (1/1) ... [2023-11-06 22:17:52,858 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@420c7eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:52, skipping insertion in model container [2023-11-06 22:17:52,858 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:17:52" (1/1) ... [2023-11-06 22:17:52,893 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:17:53,058 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_7c4a125f-44a6-4b74-bd27-22c7035da401/sv-benchmarks/c/weaver/unroll-2.wvr.c[2428,2441] [2023-11-06 22:17:53,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:17:53,077 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:17:53,099 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_7c4a125f-44a6-4b74-bd27-22c7035da401/sv-benchmarks/c/weaver/unroll-2.wvr.c[2428,2441] [2023-11-06 22:17:53,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:17:53,119 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:17:53,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:53 WrapperNode [2023-11-06 22:17:53,119 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:17:53,121 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:17:53,121 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:17:53,121 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:17:53,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:53" (1/1) ... [2023-11-06 22:17:53,137 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:53" (1/1) ... [2023-11-06 22:17:53,166 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 137 [2023-11-06 22:17:53,166 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:17:53,167 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:17:53,167 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:17:53,167 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:17:53,177 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:53" (1/1) ... [2023-11-06 22:17:53,177 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:53" (1/1) ... [2023-11-06 22:17:53,180 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:53" (1/1) ... [2023-11-06 22:17:53,180 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:53" (1/1) ... [2023-11-06 22:17:53,188 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:53" (1/1) ... [2023-11-06 22:17:53,192 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:53" (1/1) ... [2023-11-06 22:17:53,194 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:53" (1/1) ... [2023-11-06 22:17:53,195 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:53" (1/1) ... [2023-11-06 22:17:53,198 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:17:53,199 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:17:53,199 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:17:53,200 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:17:53,200 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:53" (1/1) ... [2023-11-06 22:17:53,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:17:53,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:53,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:17:53,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:17:53,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:17:53,294 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:17:53,295 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:17:53,295 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:17:53,295 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:17:53,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:17:53,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:17:53,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:17:53,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:17:53,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:17:53,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:17:53,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:17:53,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:17:53,301 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 22:17:53,477 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:17:53,483 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:17:53,797 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:17:53,807 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:17:53,808 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:17:53,810 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:17:53 BoogieIcfgContainer [2023-11-06 22:17:53,810 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:17:53,814 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:17:53,814 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:17:53,817 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:17:53,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:17:52" (1/3) ... [2023-11-06 22:17:53,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d4280c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:17:53, skipping insertion in model container [2023-11-06 22:17:53,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:17:53" (2/3) ... [2023-11-06 22:17:53,819 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d4280c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:17:53, skipping insertion in model container [2023-11-06 22:17:53,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:17:53" (3/3) ... [2023-11-06 22:17:53,820 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2023-11-06 22:17:53,834 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:17:53,845 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:17:53,846 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:17:53,846 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:17:53,941 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:17:53,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 171 transitions, 356 flow [2023-11-06 22:17:54,077 INFO L124 PetriNetUnfolderBase]: 14/169 cut-off events. [2023-11-06 22:17:54,077 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:17:54,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 169 events. 14/169 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 155 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2023-11-06 22:17:54,084 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 171 transitions, 356 flow [2023-11-06 22:17:54,091 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 160 transitions, 332 flow [2023-11-06 22:17:54,095 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:17:54,105 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 160 transitions, 332 flow [2023-11-06 22:17:54,108 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 160 transitions, 332 flow [2023-11-06 22:17:54,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 332 flow [2023-11-06 22:17:54,181 INFO L124 PetriNetUnfolderBase]: 14/160 cut-off events. [2023-11-06 22:17:54,181 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:17:54,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 160 events. 14/160 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 147 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2023-11-06 22:17:54,185 INFO L119 LiptonReduction]: Number of co-enabled transitions 2128 [2023-11-06 22:17:59,923 INFO L134 LiptonReduction]: Checked pairs total: 2025 [2023-11-06 22:17:59,924 INFO L136 LiptonReduction]: Total number of compositions: 186 [2023-11-06 22:17:59,953 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:17:59,961 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;@11913f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:17:59,962 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:17:59,977 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:17:59,977 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-06 22:17:59,977 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:17:59,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:17:59,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:59,979 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 22:17:59,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:59,991 INFO L85 PathProgramCache]: Analyzing trace with hash -114505649, now seen corresponding path program 1 times [2023-11-06 22:18:00,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:00,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717406896] [2023-11-06 22:18:00,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:00,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:00,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:00,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717406896] [2023-11-06 22:18:00,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717406896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:00,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:00,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:18:00,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741041953] [2023-11-06 22:18:00,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:00,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:18:00,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:18:00,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:18:00,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 357 [2023-11-06 22:18:00,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:00,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:00,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 357 [2023-11-06 22:18:00,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:00,617 INFO L124 PetriNetUnfolderBase]: 66/116 cut-off events. [2023-11-06 22:18:00,618 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-06 22:18:00,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 116 events. 66/116 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 315 event pairs, 9 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-11-06 22:18:00,622 INFO L140 encePairwiseOnDemand]: 353/357 looper letters, 21 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-11-06 22:18:00,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 125 flow [2023-11-06 22:18:00,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:18:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:18:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-11-06 22:18:00,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-06 22:18:00,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-11-06 22:18:00,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-11-06 22:18:00,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:00,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-11-06 22:18:00,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:00,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:00,674 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:00,675 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 476 transitions. [2023-11-06 22:18:00,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 125 flow [2023-11-06 22:18:00,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 27 transitions, 111 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:18:00,681 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2023-11-06 22:18:00,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, 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=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-06 22:18:00,687 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-06 22:18:00,687 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2023-11-06 22:18:00,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:00,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:00,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:00,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:18:00,689 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:00,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:00,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1658340857, now seen corresponding path program 1 times [2023-11-06 22:18:00,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:00,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942751428] [2023-11-06 22:18:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:00,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:00,949 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 22:18:00,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:00,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942751428] [2023-11-06 22:18:00,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942751428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:00,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:00,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:18:00,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383610141] [2023-11-06 22:18:00,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:00,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:18:00,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:00,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:18:00,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:18:00,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 357 [2023-11-06 22:18:00,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:00,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:00,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 357 [2023-11-06 22:18:00,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:01,063 INFO L124 PetriNetUnfolderBase]: 60/111 cut-off events. [2023-11-06 22:18:01,063 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-06 22:18:01,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 111 events. 60/111 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 309 event pairs, 28 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 103. Up to 106 conditions per place. [2023-11-06 22:18:01,067 INFO L140 encePairwiseOnDemand]: 354/357 looper letters, 16 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-11-06 22:18:01,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 95 flow [2023-11-06 22:18:01,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:18:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:18:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-11-06 22:18:01,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4332399626517274 [2023-11-06 22:18:01,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-11-06 22:18:01,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-11-06 22:18:01,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:01,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-11-06 22:18:01,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:01,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:01,083 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:01,084 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 3 states and 464 transitions. [2023-11-06 22:18:01,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 95 flow [2023-11-06 22:18:01,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 20 transitions, 92 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:18:01,089 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 66 flow [2023-11-06 22:18:01,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-11-06 22:18:01,090 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-11-06 22:18:01,090 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 66 flow [2023-11-06 22:18:01,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:01,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:01,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:01,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:18:01,099 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:01,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:01,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1121097712, now seen corresponding path program 1 times [2023-11-06 22:18:01,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:01,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360162695] [2023-11-06 22:18:01,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:01,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:01,458 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 22:18:01,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:01,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360162695] [2023-11-06 22:18:01,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360162695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:01,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546273140] [2023-11-06 22:18:01,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:01,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:01,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:01,468 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:01,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:18:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:01,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:18:01,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:01,682 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 22:18:01,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:01,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546273140] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:01,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:01,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-11-06 22:18:01,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10847629] [2023-11-06 22:18:01,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:01,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:18:01,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:01,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:18:01,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:18:01,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 357 [2023-11-06 22:18:01,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 150.75) internal successors, (603), 4 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:01,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:01,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 357 [2023-11-06 22:18:01,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:01,923 INFO L124 PetriNetUnfolderBase]: 76/137 cut-off events. [2023-11-06 22:18:01,923 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-06 22:18:01,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 137 events. 76/137 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 384 event pairs, 15 based on Foata normal form. 6/142 useless extension candidates. Maximal degree in co-relation 319. Up to 80 conditions per place. [2023-11-06 22:18:01,928 INFO L140 encePairwiseOnDemand]: 353/357 looper letters, 29 selfloop transitions, 4 changer transitions 1/35 dead transitions. [2023-11-06 22:18:01,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 35 transitions, 172 flow [2023-11-06 22:18:01,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:18:01,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:18:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 622 transitions. [2023-11-06 22:18:01,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43557422969187676 [2023-11-06 22:18:01,932 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 622 transitions. [2023-11-06 22:18:01,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 622 transitions. [2023-11-06 22:18:01,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:01,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 622 transitions. [2023-11-06 22:18:01,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:01,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:01,941 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:01,941 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 66 flow. Second operand 4 states and 622 transitions. [2023-11-06 22:18:01,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 35 transitions, 172 flow [2023-11-06 22:18:01,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 35 transitions, 168 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:18:01,944 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 88 flow [2023-11-06 22:18:01,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-11-06 22:18:01,947 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-06 22:18:01,947 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 88 flow [2023-11-06 22:18:01,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.75) internal successors, (603), 4 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:01,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:01,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:01,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:02,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:02,156 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:02,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:02,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1766233502, now seen corresponding path program 2 times [2023-11-06 22:18:02,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:02,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935819954] [2023-11-06 22:18:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:02,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:02,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:02,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935819954] [2023-11-06 22:18:02,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935819954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:02,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:02,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:18:02,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059916257] [2023-11-06 22:18:02,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:02,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:02,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:02,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:02,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:02,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:18:02,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:02,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:02,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:18:02,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:02,471 INFO L124 PetriNetUnfolderBase]: 101/196 cut-off events. [2023-11-06 22:18:02,472 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-11-06 22:18:02,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 196 events. 101/196 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 689 event pairs, 26 based on Foata normal form. 14/209 useless extension candidates. Maximal degree in co-relation 524. Up to 103 conditions per place. [2023-11-06 22:18:02,474 INFO L140 encePairwiseOnDemand]: 351/357 looper letters, 33 selfloop transitions, 7 changer transitions 11/51 dead transitions. [2023-11-06 22:18:02,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 51 transitions, 289 flow [2023-11-06 22:18:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:18:02,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:18:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 912 transitions. [2023-11-06 22:18:02,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257703081232493 [2023-11-06 22:18:02,479 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 912 transitions. [2023-11-06 22:18:02,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 912 transitions. [2023-11-06 22:18:02,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:02,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 912 transitions. [2023-11-06 22:18:02,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 152.0) internal successors, (912), 6 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:02,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:02,490 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 357.0) internal successors, (2499), 7 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:02,490 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 88 flow. Second operand 6 states and 912 transitions. [2023-11-06 22:18:02,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 51 transitions, 289 flow [2023-11-06 22:18:02,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 51 transitions, 282 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:18:02,494 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 150 flow [2023-11-06 22:18:02,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-11-06 22:18:02,495 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-11-06 22:18:02,495 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 150 flow [2023-11-06 22:18:02,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:02,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:02,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:02,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:18:02,497 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:02,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:02,498 INFO L85 PathProgramCache]: Analyzing trace with hash -70516821, now seen corresponding path program 1 times [2023-11-06 22:18:02,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:02,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665381040] [2023-11-06 22:18:02,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:02,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:02,722 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 22:18:02,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:02,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665381040] [2023-11-06 22:18:02,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665381040] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:02,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081278159] [2023-11-06 22:18:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:02,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:02,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:02,725 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:02,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:18:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:02,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:18:02,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:02,865 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 22:18:02,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:02,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081278159] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:02,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:18:02,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2023-11-06 22:18:02,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962186307] [2023-11-06 22:18:02,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:02,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:18:02,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:02,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:18:02,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:18:02,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 357 [2023-11-06 22:18:02,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:02,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:02,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 357 [2023-11-06 22:18:02,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:03,036 INFO L124 PetriNetUnfolderBase]: 86/168 cut-off events. [2023-11-06 22:18:03,036 INFO L125 PetriNetUnfolderBase]: For 304/310 co-relation queries the response was YES. [2023-11-06 22:18:03,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 168 events. 86/168 cut-off events. For 304/310 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 532 event pairs, 21 based on Foata normal form. 8/170 useless extension candidates. Maximal degree in co-relation 598. Up to 104 conditions per place. [2023-11-06 22:18:03,038 INFO L140 encePairwiseOnDemand]: 353/357 looper letters, 27 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-11-06 22:18:03,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 279 flow [2023-11-06 22:18:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:18:03,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:18:03,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 624 transitions. [2023-11-06 22:18:03,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369747899159664 [2023-11-06 22:18:03,042 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 624 transitions. [2023-11-06 22:18:03,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 624 transitions. [2023-11-06 22:18:03,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:03,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 624 transitions. [2023-11-06 22:18:03,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:03,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:03,050 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 357.0) internal successors, (1785), 5 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:03,050 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 150 flow. Second operand 4 states and 624 transitions. [2023-11-06 22:18:03,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 279 flow [2023-11-06 22:18:03,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 261 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:03,057 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 170 flow [2023-11-06 22:18:03,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-11-06 22:18:03,060 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2023-11-06 22:18:03,063 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 170 flow [2023-11-06 22:18:03,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:03,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:03,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:03,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:03,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:03,269 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:03,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:03,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1271660582, now seen corresponding path program 3 times [2023-11-06 22:18:03,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:03,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308552342] [2023-11-06 22:18:03,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:03,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:03,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:03,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308552342] [2023-11-06 22:18:03,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308552342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:03,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:03,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:18:03,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017530852] [2023-11-06 22:18:03,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:03,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:03,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:03,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:03,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:03,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:18:03,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:03,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:03,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:18:03,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:03,607 INFO L124 PetriNetUnfolderBase]: 113/217 cut-off events. [2023-11-06 22:18:03,607 INFO L125 PetriNetUnfolderBase]: For 442/442 co-relation queries the response was YES. [2023-11-06 22:18:03,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 217 events. 113/217 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 703 event pairs, 42 based on Foata normal form. 2/218 useless extension candidates. Maximal degree in co-relation 789. Up to 139 conditions per place. [2023-11-06 22:18:03,610 INFO L140 encePairwiseOnDemand]: 351/357 looper letters, 32 selfloop transitions, 10 changer transitions 8/50 dead transitions. [2023-11-06 22:18:03,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 50 transitions, 378 flow [2023-11-06 22:18:03,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:03,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:03,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 759 transitions. [2023-11-06 22:18:03,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42521008403361343 [2023-11-06 22:18:03,614 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 759 transitions. [2023-11-06 22:18:03,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 759 transitions. [2023-11-06 22:18:03,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:03,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 759 transitions. [2023-11-06 22:18:03,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.8) internal successors, (759), 5 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:03,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:03,622 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:03,623 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 170 flow. Second operand 5 states and 759 transitions. [2023-11-06 22:18:03,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 50 transitions, 378 flow [2023-11-06 22:18:03,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:18:03,628 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 244 flow [2023-11-06 22:18:03,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-11-06 22:18:03,631 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2023-11-06 22:18:03,631 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 244 flow [2023-11-06 22:18:03,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:03,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:03,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:03,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:18:03,635 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:03,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:03,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1804583023, now seen corresponding path program 2 times [2023-11-06 22:18:03,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:03,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418284725] [2023-11-06 22:18:03,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:03,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:03,846 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 22:18:03,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:03,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418284725] [2023-11-06 22:18:03,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418284725] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:03,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327998823] [2023-11-06 22:18:03,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:18:03,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:03,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:03,849 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:03,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:18:03,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:03,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:03,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:18:03,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:03,974 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:18:03,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327998823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:03,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:18:03,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-06 22:18:03,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220066821] [2023-11-06 22:18:03,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:03,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:03,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:03,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:03,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:18:04,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 357 [2023-11-06 22:18:04,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 244 flow. Second operand has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:04,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:04,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 357 [2023-11-06 22:18:04,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:04,159 INFO L124 PetriNetUnfolderBase]: 104/191 cut-off events. [2023-11-06 22:18:04,159 INFO L125 PetriNetUnfolderBase]: For 563/563 co-relation queries the response was YES. [2023-11-06 22:18:04,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 849 conditions, 191 events. 104/191 cut-off events. For 563/563 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 557 event pairs, 36 based on Foata normal form. 4/194 useless extension candidates. Maximal degree in co-relation 822. Up to 141 conditions per place. [2023-11-06 22:18:04,162 INFO L140 encePairwiseOnDemand]: 352/357 looper letters, 29 selfloop transitions, 13 changer transitions 3/45 dead transitions. [2023-11-06 22:18:04,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 394 flow [2023-11-06 22:18:04,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:04,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 760 transitions. [2023-11-06 22:18:04,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257703081232493 [2023-11-06 22:18:04,166 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 760 transitions. [2023-11-06 22:18:04,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 760 transitions. [2023-11-06 22:18:04,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:04,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 760 transitions. [2023-11-06 22:18:04,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:04,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:04,174 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:04,174 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 244 flow. Second operand 5 states and 760 transitions. [2023-11-06 22:18:04,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 394 flow [2023-11-06 22:18:04,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 368 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:04,179 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 265 flow [2023-11-06 22:18:04,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=265, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-11-06 22:18:04,181 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-11-06 22:18:04,181 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 265 flow [2023-11-06 22:18:04,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:04,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:04,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:04,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:04,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:18:04,393 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:04,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:04,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1337800398, now seen corresponding path program 4 times [2023-11-06 22:18:04,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:04,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972691873] [2023-11-06 22:18:04,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:04,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:04,556 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 22:18:04,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:04,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972691873] [2023-11-06 22:18:04,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972691873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:04,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735237090] [2023-11-06 22:18:04,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:18:04,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:04,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:04,560 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:04,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:18:04,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:18:04,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:04,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:18:04,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:04,708 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 22:18:04,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:04,767 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 22:18:04,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735237090] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:04,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:04,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-11-06 22:18:04,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110659574] [2023-11-06 22:18:04,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:04,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:18:04,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:04,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:18:04,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:18:04,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:18:04,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 147.14285714285714) internal successors, (1030), 7 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:04,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:04,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:18:04,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:05,049 INFO L124 PetriNetUnfolderBase]: 117/210 cut-off events. [2023-11-06 22:18:05,049 INFO L125 PetriNetUnfolderBase]: For 563/563 co-relation queries the response was YES. [2023-11-06 22:18:05,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 210 events. 117/210 cut-off events. For 563/563 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 627 event pairs, 24 based on Foata normal form. 6/215 useless extension candidates. Maximal degree in co-relation 917. Up to 131 conditions per place. [2023-11-06 22:18:05,052 INFO L140 encePairwiseOnDemand]: 352/357 looper letters, 40 selfloop transitions, 18 changer transitions 0/58 dead transitions. [2023-11-06 22:18:05,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 58 transitions, 489 flow [2023-11-06 22:18:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:18:05,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:18:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1056 transitions. [2023-11-06 22:18:05,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225690276110444 [2023-11-06 22:18:05,058 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1056 transitions. [2023-11-06 22:18:05,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1056 transitions. [2023-11-06 22:18:05,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:05,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1056 transitions. [2023-11-06 22:18:05,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 150.85714285714286) internal successors, (1056), 7 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:05,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 357.0) internal successors, (2856), 8 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:05,068 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 357.0) internal successors, (2856), 8 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:05,068 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 265 flow. Second operand 7 states and 1056 transitions. [2023-11-06 22:18:05,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 58 transitions, 489 flow [2023-11-06 22:18:05,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 463 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-06 22:18:05,074 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 311 flow [2023-11-06 22:18:05,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=311, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2023-11-06 22:18:05,076 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2023-11-06 22:18:05,076 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 311 flow [2023-11-06 22:18:05,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 147.14285714285714) internal successors, (1030), 7 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:05,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:05,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:05,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:05,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:18:05,283 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:05,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:05,283 INFO L85 PathProgramCache]: Analyzing trace with hash 971250248, now seen corresponding path program 5 times [2023-11-06 22:18:05,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:05,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056353258] [2023-11-06 22:18:05,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:05,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:18:05,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:05,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056353258] [2023-11-06 22:18:05,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056353258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:05,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:05,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:18:05,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328255251] [2023-11-06 22:18:05,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:05,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:18:05,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:05,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:18:05,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:18:05,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 357 [2023-11-06 22:18:05,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 311 flow. Second operand has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:05,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:05,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 357 [2023-11-06 22:18:05,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:05,597 INFO L124 PetriNetUnfolderBase]: 113/206 cut-off events. [2023-11-06 22:18:05,598 INFO L125 PetriNetUnfolderBase]: For 810/810 co-relation queries the response was YES. [2023-11-06 22:18:05,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1007 conditions, 206 events. 113/206 cut-off events. For 810/810 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 608 event pairs, 31 based on Foata normal form. 4/209 useless extension candidates. Maximal degree in co-relation 979. Up to 136 conditions per place. [2023-11-06 22:18:05,601 INFO L140 encePairwiseOnDemand]: 352/357 looper letters, 38 selfloop transitions, 11 changer transitions 2/51 dead transitions. [2023-11-06 22:18:05,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 478 flow [2023-11-06 22:18:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 760 transitions. [2023-11-06 22:18:05,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257703081232493 [2023-11-06 22:18:05,605 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 760 transitions. [2023-11-06 22:18:05,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 760 transitions. [2023-11-06 22:18:05,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:05,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 760 transitions. [2023-11-06 22:18:05,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:05,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:05,613 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:05,614 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 311 flow. Second operand 5 states and 760 transitions. [2023-11-06 22:18:05,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 478 flow [2023-11-06 22:18:05,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 51 transitions, 460 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:05,620 INFO L231 Difference]: Finished difference. Result has 52 places, 38 transitions, 346 flow [2023-11-06 22:18:05,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=346, PETRI_PLACES=52, PETRI_TRANSITIONS=38} [2023-11-06 22:18:05,621 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2023-11-06 22:18:05,621 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 38 transitions, 346 flow [2023-11-06 22:18:05,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:05,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:05,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:05,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:18:05,622 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:05,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:05,623 INFO L85 PathProgramCache]: Analyzing trace with hash -177519680, now seen corresponding path program 6 times [2023-11-06 22:18:05,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:05,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094916189] [2023-11-06 22:18:05,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:05,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:05,787 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 22:18:05,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:05,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094916189] [2023-11-06 22:18:05,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094916189] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:05,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198329477] [2023-11-06 22:18:05,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:18:05,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:05,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:05,789 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:05,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:18:05,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:18:05,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:05,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:18:05,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:05,938 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 22:18:05,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:06,000 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 22:18:06,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198329477] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:06,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:06,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-06 22:18:06,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265449267] [2023-11-06 22:18:06,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:06,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:18:06,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:06,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:18:06,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:18:06,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:18:06,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 38 transitions, 346 flow. Second operand has 8 states, 8 states have (on average 146.875) internal successors, (1175), 8 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:06,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:06,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:18:06,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:06,226 INFO L124 PetriNetUnfolderBase]: 106/189 cut-off events. [2023-11-06 22:18:06,226 INFO L125 PetriNetUnfolderBase]: For 997/997 co-relation queries the response was YES. [2023-11-06 22:18:06,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1017 conditions, 189 events. 106/189 cut-off events. For 997/997 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 531 event pairs, 31 based on Foata normal form. 6/194 useless extension candidates. Maximal degree in co-relation 985. Up to 136 conditions per place. [2023-11-06 22:18:06,229 INFO L140 encePairwiseOnDemand]: 352/357 looper letters, 33 selfloop transitions, 14 changer transitions 1/48 dead transitions. [2023-11-06 22:18:06,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 480 flow [2023-11-06 22:18:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:18:06,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:18:06,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 755 transitions. [2023-11-06 22:18:06,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42296918767507 [2023-11-06 22:18:06,234 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 755 transitions. [2023-11-06 22:18:06,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 755 transitions. [2023-11-06 22:18:06,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:06,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 755 transitions. [2023-11-06 22:18:06,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:06,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:06,242 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 357.0) internal successors, (2142), 6 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:06,242 INFO L175 Difference]: Start difference. First operand has 52 places, 38 transitions, 346 flow. Second operand 5 states and 755 transitions. [2023-11-06 22:18:06,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 480 flow [2023-11-06 22:18:06,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 456 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:06,248 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 338 flow [2023-11-06 22:18:06,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=338, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2023-11-06 22:18:06,249 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 32 predicate places. [2023-11-06 22:18:06,249 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 338 flow [2023-11-06 22:18:06,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 146.875) internal successors, (1175), 8 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:06,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:06,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:06,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:06,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:18:06,460 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:06,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:06,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1276480832, now seen corresponding path program 1 times [2023-11-06 22:18:06,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:06,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406696542] [2023-11-06 22:18:06,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:06,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:06,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:18:06,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:06,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406696542] [2023-11-06 22:18:06,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406696542] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:06,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668094643] [2023-11-06 22:18:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:06,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:06,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:06,592 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:06,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:18:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:06,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:18:06,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:06,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:07,071 INFO L322 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-11-06 22:18:07,072 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 22:18:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:07,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668094643] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:07,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:07,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2023-11-06 22:18:07,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544907846] [2023-11-06 22:18:07,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:07,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:18:07,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:07,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:18:07,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:18:07,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 357 [2023-11-06 22:18:07,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 338 flow. Second operand has 14 states, 14 states have (on average 130.42857142857142) internal successors, (1826), 14 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:07,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:07,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 357 [2023-11-06 22:18:07,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:08,464 INFO L124 PetriNetUnfolderBase]: 263/466 cut-off events. [2023-11-06 22:18:08,465 INFO L125 PetriNetUnfolderBase]: For 2378/2422 co-relation queries the response was YES. [2023-11-06 22:18:08,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2454 conditions, 466 events. 263/466 cut-off events. For 2378/2422 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1899 event pairs, 14 based on Foata normal form. 51/508 useless extension candidates. Maximal degree in co-relation 2139. Up to 235 conditions per place. [2023-11-06 22:18:08,471 INFO L140 encePairwiseOnDemand]: 348/357 looper letters, 39 selfloop transitions, 22 changer transitions 63/127 dead transitions. [2023-11-06 22:18:08,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 127 transitions, 1252 flow [2023-11-06 22:18:08,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:18:08,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:18:08,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2256 transitions. [2023-11-06 22:18:08,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717251606524963 [2023-11-06 22:18:08,483 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2256 transitions. [2023-11-06 22:18:08,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2256 transitions. [2023-11-06 22:18:08,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:08,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2256 transitions. [2023-11-06 22:18:08,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 132.7058823529412) internal successors, (2256), 17 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:08,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 357.0) internal successors, (6426), 18 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:08,509 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 357.0) internal successors, (6426), 18 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:08,509 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 338 flow. Second operand 17 states and 2256 transitions. [2023-11-06 22:18:08,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 127 transitions, 1252 flow [2023-11-06 22:18:08,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 127 transitions, 1139 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-11-06 22:18:08,520 INFO L231 Difference]: Finished difference. Result has 69 places, 44 transitions, 449 flow [2023-11-06 22:18:08,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=449, PETRI_PLACES=69, PETRI_TRANSITIONS=44} [2023-11-06 22:18:08,521 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 48 predicate places. [2023-11-06 22:18:08,521 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 44 transitions, 449 flow [2023-11-06 22:18:08,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 130.42857142857142) internal successors, (1826), 14 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:08,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:08,522 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:08,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 22:18:08,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:08,728 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:08,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:08,728 INFO L85 PathProgramCache]: Analyzing trace with hash -333895771, now seen corresponding path program 2 times [2023-11-06 22:18:08,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:08,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805530578] [2023-11-06 22:18:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:08,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:09,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:09,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805530578] [2023-11-06 22:18:09,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805530578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:09,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592804775] [2023-11-06 22:18:09,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:18:09,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:09,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:09,590 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:09,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:18:09,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:09,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:09,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:18:09,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:09,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:10,073 INFO L322 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-11-06 22:18:10,073 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 22:18:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:10,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592804775] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:10,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:10,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 16 [2023-11-06 22:18:10,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474518734] [2023-11-06 22:18:10,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:10,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:18:10,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:10,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:18:10,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:18:11,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 357 [2023-11-06 22:18:11,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 44 transitions, 449 flow. Second operand has 18 states, 18 states have (on average 132.33333333333334) internal successors, (2382), 18 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:11,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:11,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 357 [2023-11-06 22:18:11,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:11,479 INFO L124 PetriNetUnfolderBase]: 159/294 cut-off events. [2023-11-06 22:18:11,479 INFO L125 PetriNetUnfolderBase]: For 1915/1963 co-relation queries the response was YES. [2023-11-06 22:18:11,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1825 conditions, 294 events. 159/294 cut-off events. For 1915/1963 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1060 event pairs, 16 based on Foata normal form. 27/310 useless extension candidates. Maximal degree in co-relation 1614. Up to 174 conditions per place. [2023-11-06 22:18:11,509 INFO L140 encePairwiseOnDemand]: 351/357 looper letters, 28 selfloop transitions, 9 changer transitions 29/72 dead transitions. [2023-11-06 22:18:11,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 72 transitions, 794 flow [2023-11-06 22:18:11,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:18:11,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:18:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1217 transitions. [2023-11-06 22:18:11,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787737317149082 [2023-11-06 22:18:11,515 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1217 transitions. [2023-11-06 22:18:11,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1217 transitions. [2023-11-06 22:18:11,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:11,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1217 transitions. [2023-11-06 22:18:11,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 135.22222222222223) internal successors, (1217), 9 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:11,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 357.0) internal successors, (3570), 10 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:11,537 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 357.0) internal successors, (3570), 10 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:11,545 INFO L175 Difference]: Start difference. First operand has 69 places, 44 transitions, 449 flow. Second operand 9 states and 1217 transitions. [2023-11-06 22:18:11,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 72 transitions, 794 flow [2023-11-06 22:18:11,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 679 flow, removed 44 selfloop flow, removed 8 redundant places. [2023-11-06 22:18:11,556 INFO L231 Difference]: Finished difference. Result has 67 places, 40 transitions, 368 flow [2023-11-06 22:18:11,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=368, PETRI_PLACES=67, PETRI_TRANSITIONS=40} [2023-11-06 22:18:11,557 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-11-06 22:18:11,558 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 40 transitions, 368 flow [2023-11-06 22:18:11,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 132.33333333333334) internal successors, (2382), 18 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:11,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:11,559 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:11,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:11,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:11,767 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:11,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:11,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1319287815, now seen corresponding path program 3 times [2023-11-06 22:18:11,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:11,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411379168] [2023-11-06 22:18:11,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:11,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:13,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:13,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411379168] [2023-11-06 22:18:13,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411379168] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:13,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719098782] [2023-11-06 22:18:13,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:18:13,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:13,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:13,281 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:13,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:18:13,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:18:13,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:13,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:18:13,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:13,634 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:13,634 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 27 treesize of output 20 [2023-11-06 22:18:13,644 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 22:18:13,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:13,763 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-06 22:18:13,763 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-06 22:18:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:13,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719098782] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:13,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:13,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 3] total 15 [2023-11-06 22:18:13,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659759492] [2023-11-06 22:18:13,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:13,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:18:13,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:13,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:18:13,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:18:15,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 357 [2023-11-06 22:18:15,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 40 transitions, 368 flow. Second operand has 17 states, 17 states have (on average 132.35294117647058) internal successors, (2250), 17 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:15,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:15,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 357 [2023-11-06 22:18:15,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:15,750 INFO L124 PetriNetUnfolderBase]: 210/373 cut-off events. [2023-11-06 22:18:15,750 INFO L125 PetriNetUnfolderBase]: For 1672/1724 co-relation queries the response was YES. [2023-11-06 22:18:15,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2089 conditions, 373 events. 210/373 cut-off events. For 1672/1724 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1298 event pairs, 12 based on Foata normal form. 21/380 useless extension candidates. Maximal degree in co-relation 2056. Up to 208 conditions per place. [2023-11-06 22:18:15,755 INFO L140 encePairwiseOnDemand]: 351/357 looper letters, 58 selfloop transitions, 36 changer transitions 1/101 dead transitions. [2023-11-06 22:18:15,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 101 transitions, 1004 flow [2023-11-06 22:18:15,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:18:15,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:18:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2023 transitions. [2023-11-06 22:18:15,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2023-11-06 22:18:15,764 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2023 transitions. [2023-11-06 22:18:15,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2023 transitions. [2023-11-06 22:18:15,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:15,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2023 transitions. [2023-11-06 22:18:15,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 134.86666666666667) internal successors, (2023), 15 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:15,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 357.0) internal successors, (5712), 16 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:15,781 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 357.0) internal successors, (5712), 16 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:15,781 INFO L175 Difference]: Start difference. First operand has 67 places, 40 transitions, 368 flow. Second operand 15 states and 2023 transitions. [2023-11-06 22:18:15,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 101 transitions, 1004 flow [2023-11-06 22:18:15,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 101 transitions, 952 flow, removed 11 selfloop flow, removed 7 redundant places. [2023-11-06 22:18:15,790 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 695 flow [2023-11-06 22:18:15,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=695, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2023-11-06 22:18:15,790 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 48 predicate places. [2023-11-06 22:18:15,791 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 695 flow [2023-11-06 22:18:15,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 132.35294117647058) internal successors, (2250), 17 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:15,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:15,792 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:15,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 22:18:16,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:16,001 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:16,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:16,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1670887537, now seen corresponding path program 4 times [2023-11-06 22:18:16,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:16,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676037089] [2023-11-06 22:18:16,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:16,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:17,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:17,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676037089] [2023-11-06 22:18:17,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676037089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:17,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208006573] [2023-11-06 22:18:17,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:18:17,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:17,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:17,265 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:17,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:18:17,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:18:17,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:17,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:18:17,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:17,538 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:17,539 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 27 treesize of output 20 [2023-11-06 22:18:17,550 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 22:18:17,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:17,664 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-06 22:18:17,664 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-06 22:18:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:18:17,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208006573] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:17,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:17,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 3] total 15 [2023-11-06 22:18:17,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928601663] [2023-11-06 22:18:17,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:17,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:18:17,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:17,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:18:17,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:18:19,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 357 [2023-11-06 22:18:19,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 695 flow. Second operand has 17 states, 17 states have (on average 132.23529411764707) internal successors, (2248), 17 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:19,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:19,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 357 [2023-11-06 22:18:19,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:19,911 INFO L124 PetriNetUnfolderBase]: 353/631 cut-off events. [2023-11-06 22:18:19,912 INFO L125 PetriNetUnfolderBase]: For 3021/3107 co-relation queries the response was YES. [2023-11-06 22:18:19,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3603 conditions, 631 events. 353/631 cut-off events. For 3021/3107 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2660 event pairs, 32 based on Foata normal form. 27/639 useless extension candidates. Maximal degree in co-relation 3100. Up to 371 conditions per place. [2023-11-06 22:18:19,920 INFO L140 encePairwiseOnDemand]: 350/357 looper letters, 82 selfloop transitions, 50 changer transitions 1/139 dead transitions. [2023-11-06 22:18:19,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 139 transitions, 1474 flow [2023-11-06 22:18:19,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:18:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:18:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2033 transitions. [2023-11-06 22:18:19,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3796451914098973 [2023-11-06 22:18:19,930 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2033 transitions. [2023-11-06 22:18:19,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2033 transitions. [2023-11-06 22:18:19,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:19,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2033 transitions. [2023-11-06 22:18:19,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 135.53333333333333) internal successors, (2033), 15 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:19,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 357.0) internal successors, (5712), 16 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:19,948 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 357.0) internal successors, (5712), 16 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:19,948 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 695 flow. Second operand 15 states and 2033 transitions. [2023-11-06 22:18:19,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 139 transitions, 1474 flow [2023-11-06 22:18:19,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 139 transitions, 1398 flow, removed 36 selfloop flow, removed 2 redundant places. [2023-11-06 22:18:19,961 INFO L231 Difference]: Finished difference. Result has 82 places, 100 transitions, 1108 flow [2023-11-06 22:18:19,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1108, PETRI_PLACES=82, PETRI_TRANSITIONS=100} [2023-11-06 22:18:19,962 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 61 predicate places. [2023-11-06 22:18:19,962 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 100 transitions, 1108 flow [2023-11-06 22:18:19,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 132.23529411764707) internal successors, (2248), 17 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:19,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:19,964 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:19,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:20,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:18:20,170 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:20,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:20,170 INFO L85 PathProgramCache]: Analyzing trace with hash -475462385, now seen corresponding path program 5 times [2023-11-06 22:18:20,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:20,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934003898] [2023-11-06 22:18:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:20,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:21,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:21,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934003898] [2023-11-06 22:18:21,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934003898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:21,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95811749] [2023-11-06 22:18:21,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:18:21,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:21,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:21,377 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:21,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:18:21,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:21,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:21,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:18:21,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:21,718 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:21,719 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 27 treesize of output 20 [2023-11-06 22:18:21,728 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 22:18:21,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:21,866 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-06 22:18:21,866 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-06 22:18:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:21,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95811749] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:21,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:21,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 16 [2023-11-06 22:18:21,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590018592] [2023-11-06 22:18:21,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:21,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:18:21,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:21,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:18:21,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:18:23,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 357 [2023-11-06 22:18:23,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 100 transitions, 1108 flow. Second operand has 18 states, 18 states have (on average 131.11111111111111) internal successors, (2360), 18 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:23,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:23,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 357 [2023-11-06 22:18:23,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:23,831 INFO L124 PetriNetUnfolderBase]: 407/730 cut-off events. [2023-11-06 22:18:23,831 INFO L125 PetriNetUnfolderBase]: For 4242/4324 co-relation queries the response was YES. [2023-11-06 22:18:23,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4280 conditions, 730 events. 407/730 cut-off events. For 4242/4324 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3257 event pairs, 63 based on Foata normal form. 23/735 useless extension candidates. Maximal degree in co-relation 3807. Up to 574 conditions per place. [2023-11-06 22:18:23,841 INFO L140 encePairwiseOnDemand]: 350/357 looper letters, 92 selfloop transitions, 38 changer transitions 1/137 dead transitions. [2023-11-06 22:18:23,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 137 transitions, 1617 flow [2023-11-06 22:18:23,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:18:23,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:18:23,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1743 transitions. [2023-11-06 22:18:23,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3755656108597285 [2023-11-06 22:18:23,846 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1743 transitions. [2023-11-06 22:18:23,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1743 transitions. [2023-11-06 22:18:23,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:23,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1743 transitions. [2023-11-06 22:18:23,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 134.07692307692307) internal successors, (1743), 13 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:23,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 357.0) internal successors, (4998), 14 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:23,860 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 357.0) internal successors, (4998), 14 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:23,860 INFO L175 Difference]: Start difference. First operand has 82 places, 100 transitions, 1108 flow. Second operand 13 states and 1743 transitions. [2023-11-06 22:18:23,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 137 transitions, 1617 flow [2023-11-06 22:18:23,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 137 transitions, 1480 flow, removed 57 selfloop flow, removed 6 redundant places. [2023-11-06 22:18:23,880 INFO L231 Difference]: Finished difference. Result has 90 places, 108 transitions, 1182 flow [2023-11-06 22:18:23,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1182, PETRI_PLACES=90, PETRI_TRANSITIONS=108} [2023-11-06 22:18:23,882 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 69 predicate places. [2023-11-06 22:18:23,882 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 108 transitions, 1182 flow [2023-11-06 22:18:23,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 131.11111111111111) internal successors, (2360), 18 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:23,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:23,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:23,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:24,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:18:24,089 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:24,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:24,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1727869365, now seen corresponding path program 6 times [2023-11-06 22:18:24,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:24,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152085820] [2023-11-06 22:18:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:24,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:24,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:24,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152085820] [2023-11-06 22:18:24,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152085820] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:24,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738799423] [2023-11-06 22:18:24,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:18:24,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:24,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:24,923 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:24,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:18:25,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:18:25,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:25,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:18:25,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:25,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:18:25,269 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 22 treesize of output 15 [2023-11-06 22:18:25,325 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:25,325 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 27 treesize of output 20 [2023-11-06 22:18:25,336 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 22:18:25,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:25,426 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_337 (Array Int Int))) (= (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_337) c_~f~0.base))) (select .cse0 (+ (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4) c_~f~0.offset))))) is different from false [2023-11-06 22:18:25,475 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:25,475 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 108 [2023-11-06 22:18:25,491 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:25,492 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 19 treesize of output 28 [2023-11-06 22:18:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-11-06 22:18:25,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738799423] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:25,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:25,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2023-11-06 22:18:25,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478691273] [2023-11-06 22:18:25,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:25,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:18:25,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:25,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:18:25,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=319, Unknown=2, NotChecked=36, Total=420 [2023-11-06 22:18:25,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 357 [2023-11-06 22:18:25,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 108 transitions, 1182 flow. Second operand has 21 states, 21 states have (on average 112.80952380952381) internal successors, (2369), 21 states have internal predecessors, (2369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:25,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:25,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 357 [2023-11-06 22:18:25,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:28,454 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 22:18:30,630 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 22:18:30,773 INFO L124 PetriNetUnfolderBase]: 519/933 cut-off events. [2023-11-06 22:18:30,774 INFO L125 PetriNetUnfolderBase]: For 4988/5112 co-relation queries the response was YES. [2023-11-06 22:18:30,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5390 conditions, 933 events. 519/933 cut-off events. For 4988/5112 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4402 event pairs, 56 based on Foata normal form. 33/942 useless extension candidates. Maximal degree in co-relation 4897. Up to 561 conditions per place. [2023-11-06 22:18:30,786 INFO L140 encePairwiseOnDemand]: 348/357 looper letters, 92 selfloop transitions, 69 changer transitions 1/168 dead transitions. [2023-11-06 22:18:30,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 168 transitions, 2003 flow [2023-11-06 22:18:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:18:30,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:18:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1744 transitions. [2023-11-06 22:18:30,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32567693744164333 [2023-11-06 22:18:30,791 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1744 transitions. [2023-11-06 22:18:30,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1744 transitions. [2023-11-06 22:18:30,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:30,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1744 transitions. [2023-11-06 22:18:30,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 116.26666666666667) internal successors, (1744), 15 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:30,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 357.0) internal successors, (5712), 16 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:30,805 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 357.0) internal successors, (5712), 16 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:30,805 INFO L175 Difference]: Start difference. First operand has 90 places, 108 transitions, 1182 flow. Second operand 15 states and 1744 transitions. [2023-11-06 22:18:30,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 168 transitions, 2003 flow [2023-11-06 22:18:30,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 168 transitions, 1890 flow, removed 36 selfloop flow, removed 7 redundant places. [2023-11-06 22:18:30,824 INFO L231 Difference]: Finished difference. Result has 100 places, 136 transitions, 1638 flow [2023-11-06 22:18:30,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1638, PETRI_PLACES=100, PETRI_TRANSITIONS=136} [2023-11-06 22:18:30,825 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 79 predicate places. [2023-11-06 22:18:30,825 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 136 transitions, 1638 flow [2023-11-06 22:18:30,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 112.80952380952381) internal successors, (2369), 21 states have internal predecessors, (2369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:30,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:30,827 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:30,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:31,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:18:31,033 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:31,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:31,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1264921719, now seen corresponding path program 7 times [2023-11-06 22:18:31,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:31,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166151709] [2023-11-06 22:18:31,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:31,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:32,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:32,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166151709] [2023-11-06 22:18:32,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166151709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:32,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645805345] [2023-11-06 22:18:32,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:18:32,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:32,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:32,235 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:32,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:18:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:32,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:18:32,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:32,368 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 39 treesize of output 37 [2023-11-06 22:18:32,549 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 22:18:32,654 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:32,654 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 27 treesize of output 20 [2023-11-06 22:18:32,665 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 22:18:32,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:32,742 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_368 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_368) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))) (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset))))) is different from false [2023-11-06 22:18:32,800 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:32,801 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-11-06 22:18:32,830 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:18:32,830 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 25 treesize of output 48 [2023-11-06 22:18:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:33,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645805345] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:33,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:33,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2023-11-06 22:18:33,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595660268] [2023-11-06 22:18:33,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:33,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:18:33,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:33,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:18:33,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=314, Unknown=1, NotChecked=36, Total=420 [2023-11-06 22:18:33,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 357 [2023-11-06 22:18:33,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 136 transitions, 1638 flow. Second operand has 21 states, 21 states have (on average 109.9047619047619) internal successors, (2308), 21 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:33,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:33,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 357 [2023-11-06 22:18:33,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:34,064 INFO L124 PetriNetUnfolderBase]: 625/1118 cut-off events. [2023-11-06 22:18:34,065 INFO L125 PetriNetUnfolderBase]: For 8435/8532 co-relation queries the response was YES. [2023-11-06 22:18:34,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7130 conditions, 1118 events. 625/1118 cut-off events. For 8435/8532 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5472 event pairs, 85 based on Foata normal form. 26/1121 useless extension candidates. Maximal degree in co-relation 6570. Up to 800 conditions per place. [2023-11-06 22:18:34,081 INFO L140 encePairwiseOnDemand]: 348/357 looper letters, 123 selfloop transitions, 61 changer transitions 2/192 dead transitions. [2023-11-06 22:18:34,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 192 transitions, 2506 flow [2023-11-06 22:18:34,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:18:34,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:18:34,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1813 transitions. [2023-11-06 22:18:34,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3174019607843137 [2023-11-06 22:18:34,086 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1813 transitions. [2023-11-06 22:18:34,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1813 transitions. [2023-11-06 22:18:34,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:34,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1813 transitions. [2023-11-06 22:18:34,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 113.3125) internal successors, (1813), 16 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:34,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 357.0) internal successors, (6069), 17 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:34,101 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 357.0) internal successors, (6069), 17 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:34,101 INFO L175 Difference]: Start difference. First operand has 100 places, 136 transitions, 1638 flow. Second operand 16 states and 1813 transitions. [2023-11-06 22:18:34,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 192 transitions, 2506 flow [2023-11-06 22:18:34,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 192 transitions, 2345 flow, removed 69 selfloop flow, removed 6 redundant places. [2023-11-06 22:18:34,132 INFO L231 Difference]: Finished difference. Result has 113 places, 155 transitions, 1933 flow [2023-11-06 22:18:34,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1933, PETRI_PLACES=113, PETRI_TRANSITIONS=155} [2023-11-06 22:18:34,133 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 92 predicate places. [2023-11-06 22:18:34,133 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 155 transitions, 1933 flow [2023-11-06 22:18:34,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 109.9047619047619) internal successors, (2308), 21 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:34,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:34,134 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:34,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:34,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:18:34,345 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:34,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:34,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1284578762, now seen corresponding path program 8 times [2023-11-06 22:18:34,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:34,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824182930] [2023-11-06 22:18:34,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:34,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:34,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:34,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824182930] [2023-11-06 22:18:34,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824182930] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:34,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896296995] [2023-11-06 22:18:34,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:18:34,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:34,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:34,570 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:34,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:18:34,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:34,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:34,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:18:34,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:34,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:34,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896296995] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:34,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:34,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-06 22:18:34,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676399014] [2023-11-06 22:18:34,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:34,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:18:34,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:34,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:18:34,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:18:35,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:18:35,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 155 transitions, 1933 flow. Second operand has 15 states, 15 states have (on average 146.13333333333333) internal successors, (2192), 15 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:35,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:35,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:18:35,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:36,341 INFO L124 PetriNetUnfolderBase]: 951/1706 cut-off events. [2023-11-06 22:18:36,341 INFO L125 PetriNetUnfolderBase]: For 13490/13490 co-relation queries the response was YES. [2023-11-06 22:18:36,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11244 conditions, 1706 events. 951/1706 cut-off events. For 13490/13490 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8993 event pairs, 133 based on Foata normal form. 12/1718 useless extension candidates. Maximal degree in co-relation 10471. Up to 706 conditions per place. [2023-11-06 22:18:36,365 INFO L140 encePairwiseOnDemand]: 352/357 looper letters, 185 selfloop transitions, 64 changer transitions 0/249 dead transitions. [2023-11-06 22:18:36,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 249 transitions, 3408 flow [2023-11-06 22:18:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:18:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:18:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1671 transitions. [2023-11-06 22:18:36,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255156608097785 [2023-11-06 22:18:36,370 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1671 transitions. [2023-11-06 22:18:36,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1671 transitions. [2023-11-06 22:18:36,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:36,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1671 transitions. [2023-11-06 22:18:36,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 151.9090909090909) internal successors, (1671), 11 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:36,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 357.0) internal successors, (4284), 12 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:36,382 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 357.0) internal successors, (4284), 12 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:36,382 INFO L175 Difference]: Start difference. First operand has 113 places, 155 transitions, 1933 flow. Second operand 11 states and 1671 transitions. [2023-11-06 22:18:36,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 249 transitions, 3408 flow [2023-11-06 22:18:36,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 249 transitions, 3115 flow, removed 124 selfloop flow, removed 8 redundant places. [2023-11-06 22:18:36,427 INFO L231 Difference]: Finished difference. Result has 122 places, 177 transitions, 2269 flow [2023-11-06 22:18:36,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=1708, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2269, PETRI_PLACES=122, PETRI_TRANSITIONS=177} [2023-11-06 22:18:36,428 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 101 predicate places. [2023-11-06 22:18:36,428 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 177 transitions, 2269 flow [2023-11-06 22:18:36,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 146.13333333333333) internal successors, (2192), 15 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:36,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:36,429 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:36,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:36,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:18:36,640 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:36,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:36,640 INFO L85 PathProgramCache]: Analyzing trace with hash 735995759, now seen corresponding path program 9 times [2023-11-06 22:18:36,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:36,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675236792] [2023-11-06 22:18:36,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:36,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:36,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:36,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675236792] [2023-11-06 22:18:36,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675236792] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:36,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276458134] [2023-11-06 22:18:36,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:18:36,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:36,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:36,859 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:36,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:18:36,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:18:36,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:36,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:18:36,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:37,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:37,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276458134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:37,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:37,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-11-06 22:18:37,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025113354] [2023-11-06 22:18:37,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:37,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:18:37,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:37,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:18:37,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:18:37,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:18:37,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 177 transitions, 2269 flow. Second operand has 14 states, 14 states have (on average 146.14285714285714) internal successors, (2046), 14 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 22:18:37,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:37,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:18:37,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:38,839 INFO L124 PetriNetUnfolderBase]: 982/1851 cut-off events. [2023-11-06 22:18:38,840 INFO L125 PetriNetUnfolderBase]: For 19835/19835 co-relation queries the response was YES. [2023-11-06 22:18:38,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12582 conditions, 1851 events. 982/1851 cut-off events. For 19835/19835 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10873 event pairs, 82 based on Foata normal form. 44/1895 useless extension candidates. Maximal degree in co-relation 12015. Up to 751 conditions per place. [2023-11-06 22:18:38,870 INFO L140 encePairwiseOnDemand]: 351/357 looper letters, 209 selfloop transitions, 124 changer transitions 39/372 dead transitions. [2023-11-06 22:18:38,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 372 transitions, 5073 flow [2023-11-06 22:18:38,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:18:38,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:18:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3145 transitions. [2023-11-06 22:18:38,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41950113378684806 [2023-11-06 22:18:38,877 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3145 transitions. [2023-11-06 22:18:38,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3145 transitions. [2023-11-06 22:18:38,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:38,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3145 transitions. [2023-11-06 22:18:38,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 149.76190476190476) internal successors, (3145), 21 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:38,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 357.0) internal successors, (7854), 22 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:38,894 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 357.0) internal successors, (7854), 22 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:38,894 INFO L175 Difference]: Start difference. First operand has 122 places, 177 transitions, 2269 flow. Second operand 21 states and 3145 transitions. [2023-11-06 22:18:38,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 372 transitions, 5073 flow [2023-11-06 22:18:38,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 372 transitions, 4923 flow, removed 42 selfloop flow, removed 3 redundant places. [2023-11-06 22:18:38,974 INFO L231 Difference]: Finished difference. Result has 149 places, 243 transitions, 3479 flow [2023-11-06 22:18:38,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3479, PETRI_PLACES=149, PETRI_TRANSITIONS=243} [2023-11-06 22:18:38,975 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 128 predicate places. [2023-11-06 22:18:38,975 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 243 transitions, 3479 flow [2023-11-06 22:18:38,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 146.14285714285714) internal successors, (2046), 14 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 22:18:38,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:38,976 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:38,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:39,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:39,182 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:39,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:39,182 INFO L85 PathProgramCache]: Analyzing trace with hash 736494501, now seen corresponding path program 10 times [2023-11-06 22:18:39,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:39,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720736958] [2023-11-06 22:18:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:39,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:39,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:39,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720736958] [2023-11-06 22:18:39,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720736958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:39,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365230313] [2023-11-06 22:18:39,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:18:39,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:39,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:39,441 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:39,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:18:39,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:18:39,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:39,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:18:39,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:39,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:39,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365230313] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:39,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:39,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-06 22:18:39,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808541724] [2023-11-06 22:18:39,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:39,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:18:39,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:39,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:18:39,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:18:40,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:18:40,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 243 transitions, 3479 flow. Second operand has 18 states, 18 states have (on average 145.72222222222223) internal successors, (2623), 18 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:40,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:40,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:18:40,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:41,398 INFO L124 PetriNetUnfolderBase]: 861/1630 cut-off events. [2023-11-06 22:18:41,398 INFO L125 PetriNetUnfolderBase]: For 23099/23099 co-relation queries the response was YES. [2023-11-06 22:18:41,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12591 conditions, 1630 events. 861/1630 cut-off events. For 23099/23099 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9253 event pairs, 176 based on Foata normal form. 90/1720 useless extension candidates. Maximal degree in co-relation 12436. Up to 739 conditions per place. [2023-11-06 22:18:41,415 INFO L140 encePairwiseOnDemand]: 351/357 looper letters, 151 selfloop transitions, 203 changer transitions 6/360 dead transitions. [2023-11-06 22:18:41,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 360 transitions, 5882 flow [2023-11-06 22:18:41,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:18:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:18:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3008 transitions. [2023-11-06 22:18:41,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42128851540616247 [2023-11-06 22:18:41,421 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3008 transitions. [2023-11-06 22:18:41,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3008 transitions. [2023-11-06 22:18:41,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:41,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3008 transitions. [2023-11-06 22:18:41,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 150.4) internal successors, (3008), 20 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:41,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 357.0) internal successors, (7497), 21 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:41,437 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 357.0) internal successors, (7497), 21 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:41,438 INFO L175 Difference]: Start difference. First operand has 149 places, 243 transitions, 3479 flow. Second operand 20 states and 3008 transitions. [2023-11-06 22:18:41,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 360 transitions, 5882 flow [2023-11-06 22:18:41,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 360 transitions, 4996 flow, removed 392 selfloop flow, removed 7 redundant places. [2023-11-06 22:18:41,573 INFO L231 Difference]: Finished difference. Result has 164 places, 296 transitions, 4532 flow [2023-11-06 22:18:41,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=2739, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4532, PETRI_PLACES=164, PETRI_TRANSITIONS=296} [2023-11-06 22:18:41,573 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 143 predicate places. [2023-11-06 22:18:41,574 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 296 transitions, 4532 flow [2023-11-06 22:18:41,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 145.72222222222223) internal successors, (2623), 18 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:41,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:41,575 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:41,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:41,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:41,780 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 22:18:41,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:41,781 INFO L85 PathProgramCache]: Analyzing trace with hash 596460365, now seen corresponding path program 11 times [2023-11-06 22:18:41,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:41,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667150343] [2023-11-06 22:18:41,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:41,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:42,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:42,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667150343] [2023-11-06 22:18:42,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667150343] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:42,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399386241] [2023-11-06 22:18:42,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:18:42,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:42,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:42,030 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:42,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:18:42,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:42,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:42,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:18:42,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:42,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:42,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399386241] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:42,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:42,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-06 22:18:42,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671036049] [2023-11-06 22:18:42,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:42,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:18:42,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:42,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:18:42,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:18:42,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:18:42,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 296 transitions, 4532 flow. Second operand has 17 states, 17 states have (on average 145.88235294117646) internal successors, (2480), 17 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:42,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:42,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:18:42,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:44,460 INFO L124 PetriNetUnfolderBase]: 865/1753 cut-off events. [2023-11-06 22:18:44,460 INFO L125 PetriNetUnfolderBase]: For 18185/18185 co-relation queries the response was YES. [2023-11-06 22:18:44,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12518 conditions, 1753 events. 865/1753 cut-off events. For 18185/18185 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10814 event pairs, 87 based on Foata normal form. 24/1777 useless extension candidates. Maximal degree in co-relation 12137. Up to 741 conditions per place. [2023-11-06 22:18:44,480 INFO L140 encePairwiseOnDemand]: 351/357 looper letters, 186 selfloop transitions, 212 changer transitions 11/409 dead transitions. [2023-11-06 22:18:44,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 409 transitions, 6299 flow [2023-11-06 22:18:44,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:18:44,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 22:18:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4617 transitions. [2023-11-06 22:18:44,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41718622933044186 [2023-11-06 22:18:44,488 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4617 transitions. [2023-11-06 22:18:44,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4617 transitions. [2023-11-06 22:18:44,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:44,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4617 transitions. [2023-11-06 22:18:44,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 148.93548387096774) internal successors, (4617), 31 states have internal predecessors, (4617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:44,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 357.0) internal successors, (11424), 32 states have internal predecessors, (11424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:44,511 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 357.0) internal successors, (11424), 32 states have internal predecessors, (11424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:44,511 INFO L175 Difference]: Start difference. First operand has 164 places, 296 transitions, 4532 flow. Second operand 31 states and 4617 transitions. [2023-11-06 22:18:44,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 409 transitions, 6299 flow [2023-11-06 22:18:44,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 409 transitions, 5777 flow, removed 219 selfloop flow, removed 6 redundant places. [2023-11-06 22:18:44,653 INFO L231 Difference]: Finished difference. Result has 192 places, 313 transitions, 4790 flow [2023-11-06 22:18:44,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=3845, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4790, PETRI_PLACES=192, PETRI_TRANSITIONS=313} [2023-11-06 22:18:44,654 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 171 predicate places. [2023-11-06 22:18:44,654 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 313 transitions, 4790 flow [2023-11-06 22:18:44,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 145.88235294117646) internal successors, (2480), 17 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:44,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:44,655 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:44,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:44,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:44,865 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 22:18:44,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:44,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1705888511, now seen corresponding path program 12 times [2023-11-06 22:18:44,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:44,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77094088] [2023-11-06 22:18:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:44,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:45,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:45,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77094088] [2023-11-06 22:18:45,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77094088] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:45,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262880297] [2023-11-06 22:18:45,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:18:45,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:45,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:45,093 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:45,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:18:45,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:18:45,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:45,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:18:45,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:45,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:45,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262880297] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:45,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:45,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-06 22:18:45,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627765917] [2023-11-06 22:18:45,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:45,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:18:45,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:45,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:18:45,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:18:45,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:18:45,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 313 transitions, 4790 flow. Second operand has 17 states, 17 states have (on average 145.76470588235293) internal successors, (2478), 17 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:45,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:45,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:18:45,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:47,830 INFO L124 PetriNetUnfolderBase]: 1000/2010 cut-off events. [2023-11-06 22:18:47,830 INFO L125 PetriNetUnfolderBase]: For 22170/22170 co-relation queries the response was YES. [2023-11-06 22:18:47,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15069 conditions, 2010 events. 1000/2010 cut-off events. For 22170/22170 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12716 event pairs, 205 based on Foata normal form. 22/2032 useless extension candidates. Maximal degree in co-relation 14706. Up to 1095 conditions per place. [2023-11-06 22:18:47,852 INFO L140 encePairwiseOnDemand]: 351/357 looper letters, 256 selfloop transitions, 198 changer transitions 6/460 dead transitions. [2023-11-06 22:18:47,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 460 transitions, 7694 flow [2023-11-06 22:18:47,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:18:47,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:18:47,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3594 transitions. [2023-11-06 22:18:47,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41946778711484595 [2023-11-06 22:18:47,859 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3594 transitions. [2023-11-06 22:18:47,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3594 transitions. [2023-11-06 22:18:47,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:47,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3594 transitions. [2023-11-06 22:18:47,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 149.75) internal successors, (3594), 24 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:47,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 357.0) internal successors, (8925), 25 states have internal predecessors, (8925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:47,876 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 357.0) internal successors, (8925), 25 states have internal predecessors, (8925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:47,877 INFO L175 Difference]: Start difference. First operand has 192 places, 313 transitions, 4790 flow. Second operand 24 states and 3594 transitions. [2023-11-06 22:18:47,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 460 transitions, 7694 flow [2023-11-06 22:18:48,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 460 transitions, 7010 flow, removed 133 selfloop flow, removed 17 redundant places. [2023-11-06 22:18:48,045 INFO L231 Difference]: Finished difference. Result has 206 places, 379 transitions, 5988 flow [2023-11-06 22:18:48,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=4307, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5988, PETRI_PLACES=206, PETRI_TRANSITIONS=379} [2023-11-06 22:18:48,046 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 185 predicate places. [2023-11-06 22:18:48,046 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 379 transitions, 5988 flow [2023-11-06 22:18:48,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 145.76470588235293) internal successors, (2478), 17 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:48,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:48,047 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:48,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:48,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:18:48,252 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:48,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:48,253 INFO L85 PathProgramCache]: Analyzing trace with hash -776683921, now seen corresponding path program 13 times [2023-11-06 22:18:48,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:48,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407963805] [2023-11-06 22:18:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:48,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:48,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:48,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407963805] [2023-11-06 22:18:48,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407963805] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:48,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921143599] [2023-11-06 22:18:48,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:18:48,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:48,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:48,527 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:48,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:18:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:48,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:18:48,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:48,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:48,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921143599] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:48,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:48,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-06 22:18:48,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949238384] [2023-11-06 22:18:48,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:48,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:18:48,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:48,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:18:48,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:18:49,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:18:49,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 379 transitions, 5988 flow. Second operand has 17 states, 17 states have (on average 145.88235294117646) internal successors, (2480), 17 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:49,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:49,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:18:49,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:51,615 INFO L124 PetriNetUnfolderBase]: 1156/2308 cut-off events. [2023-11-06 22:18:51,616 INFO L125 PetriNetUnfolderBase]: For 26571/26571 co-relation queries the response was YES. [2023-11-06 22:18:51,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17879 conditions, 2308 events. 1156/2308 cut-off events. For 26571/26571 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14950 event pairs, 211 based on Foata normal form. 12/2320 useless extension candidates. Maximal degree in co-relation 17521. Up to 1018 conditions per place. [2023-11-06 22:18:51,640 INFO L140 encePairwiseOnDemand]: 351/357 looper letters, 254 selfloop transitions, 279 changer transitions 6/539 dead transitions. [2023-11-06 22:18:51,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 539 transitions, 9029 flow [2023-11-06 22:18:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:18:51,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 22:18:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3904 transitions. [2023-11-06 22:18:51,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42059900883430296 [2023-11-06 22:18:51,647 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3904 transitions. [2023-11-06 22:18:51,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3904 transitions. [2023-11-06 22:18:51,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:51,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3904 transitions. [2023-11-06 22:18:51,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 150.15384615384616) internal successors, (3904), 26 states have internal predecessors, (3904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:51,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 357.0) internal successors, (9639), 27 states have internal predecessors, (9639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:51,665 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 357.0) internal successors, (9639), 27 states have internal predecessors, (9639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:51,666 INFO L175 Difference]: Start difference. First operand has 206 places, 379 transitions, 5988 flow. Second operand 26 states and 3904 transitions. [2023-11-06 22:18:51,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 539 transitions, 9029 flow [2023-11-06 22:18:51,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 539 transitions, 8729 flow, removed 112 selfloop flow, removed 4 redundant places. [2023-11-06 22:18:51,941 INFO L231 Difference]: Finished difference. Result has 232 places, 434 transitions, 7458 flow [2023-11-06 22:18:51,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=5706, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7458, PETRI_PLACES=232, PETRI_TRANSITIONS=434} [2023-11-06 22:18:51,942 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 211 predicate places. [2023-11-06 22:18:51,943 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 434 transitions, 7458 flow [2023-11-06 22:18:51,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 145.88235294117646) internal successors, (2480), 17 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:51,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:51,943 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:51,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:52,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:18:52,154 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:52,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:52,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1000065587, now seen corresponding path program 14 times [2023-11-06 22:18:52,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:52,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479473976] [2023-11-06 22:18:52,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:52,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:52,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:52,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479473976] [2023-11-06 22:18:52,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479473976] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:52,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753494859] [2023-11-06 22:18:52,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:18:52,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:52,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:52,413 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:52,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:18:52,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:18:52,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:52,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:18:52,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:52,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:52,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753494859] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:52,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:52,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-06 22:18:52,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037798611] [2023-11-06 22:18:52,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:52,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:18:52,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:52,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:18:52,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:18:53,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:18:53,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 434 transitions, 7458 flow. Second operand has 16 states, 16 states have (on average 145.9375) internal successors, (2335), 16 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:53,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:53,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:18:53,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:18:56,612 INFO L124 PetriNetUnfolderBase]: 1117/2263 cut-off events. [2023-11-06 22:18:56,612 INFO L125 PetriNetUnfolderBase]: For 29370/29370 co-relation queries the response was YES. [2023-11-06 22:18:56,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18196 conditions, 2263 events. 1117/2263 cut-off events. For 29370/29370 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14826 event pairs, 111 based on Foata normal form. 36/2299 useless extension candidates. Maximal degree in co-relation 17859. Up to 957 conditions per place. [2023-11-06 22:18:56,645 INFO L140 encePairwiseOnDemand]: 351/357 looper letters, 260 selfloop transitions, 294 changer transitions 15/569 dead transitions. [2023-11-06 22:18:56,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 569 transitions, 9839 flow [2023-11-06 22:18:56,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-06 22:18:56,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-06 22:18:56,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6542 transitions. [2023-11-06 22:18:56,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41647568118156353 [2023-11-06 22:18:56,659 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6542 transitions. [2023-11-06 22:18:56,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6542 transitions. [2023-11-06 22:18:56,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:18:56,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6542 transitions. [2023-11-06 22:18:56,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 148.6818181818182) internal successors, (6542), 44 states have internal predecessors, (6542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:56,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 357.0) internal successors, (16065), 45 states have internal predecessors, (16065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:56,695 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 357.0) internal successors, (16065), 45 states have internal predecessors, (16065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:56,695 INFO L175 Difference]: Start difference. First operand has 232 places, 434 transitions, 7458 flow. Second operand 44 states and 6542 transitions. [2023-11-06 22:18:56,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 569 transitions, 9839 flow [2023-11-06 22:18:56,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 569 transitions, 9478 flow, removed 85 selfloop flow, removed 12 redundant places. [2023-11-06 22:18:56,933 INFO L231 Difference]: Finished difference. Result has 268 places, 445 transitions, 7983 flow [2023-11-06 22:18:56,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=6840, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=7983, PETRI_PLACES=268, PETRI_TRANSITIONS=445} [2023-11-06 22:18:56,934 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 247 predicate places. [2023-11-06 22:18:56,935 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 445 transitions, 7983 flow [2023-11-06 22:18:56,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 145.9375) internal successors, (2335), 16 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:56,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:18:56,935 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:56,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:57,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:57,141 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:18:57,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:57,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1692331749, now seen corresponding path program 15 times [2023-11-06 22:18:57,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:57,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586412772] [2023-11-06 22:18:57,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:57,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:57,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:57,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586412772] [2023-11-06 22:18:57,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586412772] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:57,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405099730] [2023-11-06 22:18:57,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:18:57,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:57,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:57,341 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:57,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:18:57,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:18:57,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:18:57,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:18:57,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:57,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:18:57,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405099730] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:57,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:57,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-06 22:18:57,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322409505] [2023-11-06 22:18:57,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:57,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:18:57,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:57,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:18:57,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:18:58,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:18:58,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 445 transitions, 7983 flow. Second operand has 17 states, 17 states have (on average 145.8235294117647) internal successors, (2479), 17 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:58,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:18:58,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:18:58,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:01,606 INFO L124 PetriNetUnfolderBase]: 1510/2969 cut-off events. [2023-11-06 22:19:01,606 INFO L125 PetriNetUnfolderBase]: For 42445/42445 co-relation queries the response was YES. [2023-11-06 22:19:01,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26078 conditions, 2969 events. 1510/2969 cut-off events. For 42445/42445 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20203 event pairs, 372 based on Foata normal form. 72/3041 useless extension candidates. Maximal degree in co-relation 25919. Up to 1991 conditions per place. [2023-11-06 22:19:01,712 INFO L140 encePairwiseOnDemand]: 351/357 looper letters, 446 selfloop transitions, 296 changer transitions 2/744 dead transitions. [2023-11-06 22:19:01,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 744 transitions, 14888 flow [2023-11-06 22:19:01,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:19:01,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 22:19:01,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5057 transitions. [2023-11-06 22:19:01,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166254737188993 [2023-11-06 22:19:01,720 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5057 transitions. [2023-11-06 22:19:01,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5057 transitions. [2023-11-06 22:19:01,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:01,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5057 transitions. [2023-11-06 22:19:01,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 148.73529411764707) internal successors, (5057), 34 states have internal predecessors, (5057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:01,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 357.0) internal successors, (12495), 35 states have internal predecessors, (12495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:01,743 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 357.0) internal successors, (12495), 35 states have internal predecessors, (12495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:01,743 INFO L175 Difference]: Start difference. First operand has 268 places, 445 transitions, 7983 flow. Second operand 34 states and 5057 transitions. [2023-11-06 22:19:01,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 744 transitions, 14888 flow [2023-11-06 22:19:02,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 744 transitions, 14010 flow, removed 223 selfloop flow, removed 23 redundant places. [2023-11-06 22:19:02,123 INFO L231 Difference]: Finished difference. Result has 293 places, 640 transitions, 12393 flow [2023-11-06 22:19:02,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=7455, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=12393, PETRI_PLACES=293, PETRI_TRANSITIONS=640} [2023-11-06 22:19:02,123 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 272 predicate places. [2023-11-06 22:19:02,124 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 640 transitions, 12393 flow [2023-11-06 22:19:02,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 145.8235294117647) internal successors, (2479), 17 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:02,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:02,124 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:02,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:02,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:02,325 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:02,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:02,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1270619119, now seen corresponding path program 16 times [2023-11-06 22:19:02,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:02,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733660102] [2023-11-06 22:19:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:02,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:02,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:02,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733660102] [2023-11-06 22:19:02,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733660102] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:02,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220333154] [2023-11-06 22:19:02,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:19:02,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:02,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:02,586 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:02,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:19:02,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:19:02,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:02,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:19:02,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:02,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:02,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220333154] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:02,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:02,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-06 22:19:02,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633895090] [2023-11-06 22:19:02,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:02,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:19:02,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:02,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:19:02,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:19:03,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:19:03,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 640 transitions, 12393 flow. Second operand has 18 states, 18 states have (on average 145.83333333333334) internal successors, (2625), 18 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:03,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:03,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:19:03,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:07,278 INFO L124 PetriNetUnfolderBase]: 1977/3976 cut-off events. [2023-11-06 22:19:07,278 INFO L125 PetriNetUnfolderBase]: For 75316/75316 co-relation queries the response was YES. [2023-11-06 22:19:07,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37122 conditions, 3976 events. 1977/3976 cut-off events. For 75316/75316 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 29294 event pairs, 292 based on Foata normal form. 36/4012 useless extension candidates. Maximal degree in co-relation 36771. Up to 1647 conditions per place. [2023-11-06 22:19:07,333 INFO L140 encePairwiseOnDemand]: 351/357 looper letters, 443 selfloop transitions, 474 changer transitions 3/920 dead transitions. [2023-11-06 22:19:07,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 920 transitions, 19333 flow [2023-11-06 22:19:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:19:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 22:19:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4199 transitions. [2023-11-06 22:19:07,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4200680272108844 [2023-11-06 22:19:07,340 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4199 transitions. [2023-11-06 22:19:07,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4199 transitions. [2023-11-06 22:19:07,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:07,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4199 transitions. [2023-11-06 22:19:07,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 149.96428571428572) internal successors, (4199), 28 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:07,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 357.0) internal successors, (10353), 29 states have internal predecessors, (10353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:07,361 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 357.0) internal successors, (10353), 29 states have internal predecessors, (10353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:07,361 INFO L175 Difference]: Start difference. First operand has 293 places, 640 transitions, 12393 flow. Second operand 28 states and 4199 transitions. [2023-11-06 22:19:07,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 920 transitions, 19333 flow [2023-11-06 22:19:08,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 920 transitions, 18473 flow, removed 410 selfloop flow, removed 3 redundant places. [2023-11-06 22:19:08,430 INFO L231 Difference]: Finished difference. Result has 323 places, 774 transitions, 16059 flow [2023-11-06 22:19:08,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=11785, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=16059, PETRI_PLACES=323, PETRI_TRANSITIONS=774} [2023-11-06 22:19:08,432 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 302 predicate places. [2023-11-06 22:19:08,432 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 774 transitions, 16059 flow [2023-11-06 22:19:08,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 145.83333333333334) internal successors, (2625), 18 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:08,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:08,433 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:08,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:08,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:08,633 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:08,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:08,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1047237453, now seen corresponding path program 17 times [2023-11-06 22:19:08,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:08,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889609345] [2023-11-06 22:19:08,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:08,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:08,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:08,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889609345] [2023-11-06 22:19:08,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889609345] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:08,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793998997] [2023-11-06 22:19:08,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:19:08,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:08,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:08,941 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:08,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:19:09,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:19:09,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:09,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:19:09,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:09,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:09,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793998997] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:09,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:09,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-06 22:19:09,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385830414] [2023-11-06 22:19:09,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:09,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:19:09,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:09,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:19:09,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:19:09,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:19:09,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 774 transitions, 16059 flow. Second operand has 17 states, 17 states have (on average 145.88235294117646) internal successors, (2480), 17 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:09,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:09,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:19:09,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:15,780 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 [] [2023-11-06 22:19:19,565 INFO L124 PetriNetUnfolderBase]: 2183/4453 cut-off events. [2023-11-06 22:19:19,566 INFO L125 PetriNetUnfolderBase]: For 95867/95867 co-relation queries the response was YES. [2023-11-06 22:19:19,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43602 conditions, 4453 events. 2183/4453 cut-off events. For 95867/95867 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 33864 event pairs, 189 based on Foata normal form. 54/4507 useless extension candidates. Maximal degree in co-relation 43224. Up to 1873 conditions per place. [2023-11-06 22:19:19,752 INFO L140 encePairwiseOnDemand]: 350/357 looper letters, 463 selfloop transitions, 581 changer transitions 24/1068 dead transitions. [2023-11-06 22:19:19,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1068 transitions, 23477 flow [2023-11-06 22:19:19,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-06 22:19:19,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-06 22:19:19,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 7711 transitions. [2023-11-06 22:19:19,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153738418444301 [2023-11-06 22:19:19,760 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 7711 transitions. [2023-11-06 22:19:19,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 7711 transitions. [2023-11-06 22:19:19,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:19,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 7711 transitions. [2023-11-06 22:19:19,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 148.28846153846155) internal successors, (7711), 52 states have internal predecessors, (7711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:19,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 357.0) internal successors, (18921), 53 states have internal predecessors, (18921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:19,798 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 357.0) internal successors, (18921), 53 states have internal predecessors, (18921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:19,798 INFO L175 Difference]: Start difference. First operand has 323 places, 774 transitions, 16059 flow. Second operand 52 states and 7711 transitions. [2023-11-06 22:19:19,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1068 transitions, 23477 flow [2023-11-06 22:19:21,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1068 transitions, 22512 flow, removed 413 selfloop flow, removed 13 redundant places. [2023-11-06 22:19:21,028 INFO L231 Difference]: Finished difference. Result has 371 places, 904 transitions, 20018 flow [2023-11-06 22:19:21,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=15237, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=447, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=20018, PETRI_PLACES=371, PETRI_TRANSITIONS=904} [2023-11-06 22:19:21,029 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 350 predicate places. [2023-11-06 22:19:21,030 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 904 transitions, 20018 flow [2023-11-06 22:19:21,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 145.88235294117646) internal successors, (2480), 17 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:21,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:21,030 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:21,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-06 22:19:21,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:21,231 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:21,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:21,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1015222707, now seen corresponding path program 18 times [2023-11-06 22:19:21,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:21,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767804273] [2023-11-06 22:19:21,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:21,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:21,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:21,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767804273] [2023-11-06 22:19:21,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767804273] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:21,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114557569] [2023-11-06 22:19:21,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:19:21,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:21,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:21,449 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:21,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:19:21,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:19:21,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:21,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:19:21,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:21,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:21,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114557569] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:21,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:21,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-06 22:19:21,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005685570] [2023-11-06 22:19:21,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:21,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:19:21,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:21,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:19:21,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:19:22,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:19:22,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 904 transitions, 20018 flow. Second operand has 16 states, 16 states have (on average 146.0) internal successors, (2336), 16 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:22,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:22,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:19:22,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:25,860 INFO L124 PetriNetUnfolderBase]: 3108/6291 cut-off events. [2023-11-06 22:19:25,860 INFO L125 PetriNetUnfolderBase]: For 141980/141980 co-relation queries the response was YES. [2023-11-06 22:19:25,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65301 conditions, 6291 events. 3108/6291 cut-off events. For 141980/141980 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 50586 event pairs, 118 based on Foata normal form. 32/6323 useless extension candidates. Maximal degree in co-relation 64541. Up to 2983 conditions per place. [2023-11-06 22:19:25,938 INFO L140 encePairwiseOnDemand]: 352/357 looper letters, 1045 selfloop transitions, 345 changer transitions 12/1402 dead transitions. [2023-11-06 22:19:25,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1402 transitions, 34475 flow [2023-11-06 22:19:25,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:19:25,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:19:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2100 transitions. [2023-11-06 22:19:25,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42016806722689076 [2023-11-06 22:19:25,942 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2100 transitions. [2023-11-06 22:19:25,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2100 transitions. [2023-11-06 22:19:25,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:25,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2100 transitions. [2023-11-06 22:19:25,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 150.0) internal successors, (2100), 14 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 22:19:25,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 357.0) internal successors, (5355), 15 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:25,950 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 357.0) internal successors, (5355), 15 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:25,950 INFO L175 Difference]: Start difference. First operand has 371 places, 904 transitions, 20018 flow. Second operand 14 states and 2100 transitions. [2023-11-06 22:19:25,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1402 transitions, 34475 flow [2023-11-06 22:19:28,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1402 transitions, 33007 flow, removed 586 selfloop flow, removed 20 redundant places. [2023-11-06 22:19:28,813 INFO L231 Difference]: Finished difference. Result has 371 places, 1126 transitions, 26028 flow [2023-11-06 22:19:28,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=18990, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=903, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=26028, PETRI_PLACES=371, PETRI_TRANSITIONS=1126} [2023-11-06 22:19:28,821 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 350 predicate places. [2023-11-06 22:19:28,822 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 1126 transitions, 26028 flow [2023-11-06 22:19:28,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 146.0) internal successors, (2336), 16 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:28,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:28,822 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:28,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:29,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:19:29,034 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:29,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:29,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1223175569, now seen corresponding path program 19 times [2023-11-06 22:19:29,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:29,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956424034] [2023-11-06 22:19:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:29,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:29,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:29,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956424034] [2023-11-06 22:19:29,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956424034] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:29,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196741322] [2023-11-06 22:19:29,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:19:29,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:29,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:29,323 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:29,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:19:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:29,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:19:29,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:29,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:29,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196741322] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:29,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:29,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-06 22:19:29,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974878333] [2023-11-06 22:19:29,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:29,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:19:29,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:29,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:19:29,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:19:30,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:19:30,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 1126 transitions, 26028 flow. Second operand has 18 states, 18 states have (on average 145.83333333333334) internal successors, (2625), 18 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:30,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:30,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:19:30,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:34,637 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 [] [2023-11-06 22:19:38,679 INFO L124 PetriNetUnfolderBase]: 3521/7010 cut-off events. [2023-11-06 22:19:38,679 INFO L125 PetriNetUnfolderBase]: For 161888/161888 co-relation queries the response was YES. [2023-11-06 22:19:38,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74421 conditions, 7010 events. 3521/7010 cut-off events. For 161888/161888 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 56675 event pairs, 103 based on Foata normal form. 70/7080 useless extension candidates. Maximal degree in co-relation 73628. Up to 3113 conditions per place. [2023-11-06 22:19:38,788 INFO L140 encePairwiseOnDemand]: 351/357 looper letters, 1027 selfloop transitions, 587 changer transitions 11/1625 dead transitions. [2023-11-06 22:19:38,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 1625 transitions, 40882 flow [2023-11-06 22:19:38,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:19:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-06 22:19:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4764 transitions. [2023-11-06 22:19:38,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170168067226891 [2023-11-06 22:19:38,813 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4764 transitions. [2023-11-06 22:19:38,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4764 transitions. [2023-11-06 22:19:38,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:38,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4764 transitions. [2023-11-06 22:19:38,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 148.875) internal successors, (4764), 32 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:38,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 357.0) internal successors, (11781), 33 states have internal predecessors, (11781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:38,849 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 357.0) internal successors, (11781), 33 states have internal predecessors, (11781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:38,849 INFO L175 Difference]: Start difference. First operand has 371 places, 1126 transitions, 26028 flow. Second operand 32 states and 4764 transitions. [2023-11-06 22:19:38,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 1625 transitions, 40882 flow [2023-11-06 22:19:42,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 1625 transitions, 40685 flow, removed 74 selfloop flow, removed 2 redundant places. [2023-11-06 22:19:42,199 INFO L231 Difference]: Finished difference. Result has 418 places, 1359 transitions, 34477 flow [2023-11-06 22:19:42,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=25853, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=34477, PETRI_PLACES=418, PETRI_TRANSITIONS=1359} [2023-11-06 22:19:42,202 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 397 predicate places. [2023-11-06 22:19:42,202 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 1359 transitions, 34477 flow [2023-11-06 22:19:42,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 145.83333333333334) internal successors, (2625), 18 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:42,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:19:42,203 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:42,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:19:42,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:19:42,412 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:19:42,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:42,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1471782575, now seen corresponding path program 20 times [2023-11-06 22:19:42,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:42,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783402294] [2023-11-06 22:19:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:42,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:42,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:42,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783402294] [2023-11-06 22:19:42,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783402294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:19:42,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600330634] [2023-11-06 22:19:42,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:19:42,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:19:42,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:19:42,690 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:19:42,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:19:42,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:19:42,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:19:42,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:19:42,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:19:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:42,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:19:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:19:43,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600330634] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:19:43,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:19:43,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-06 22:19:43,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102301350] [2023-11-06 22:19:43,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:19:43,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:19:43,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:43,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:19:43,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:19:43,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:19:43,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 1359 transitions, 34477 flow. Second operand has 19 states, 19 states have (on average 145.78947368421052) internal successors, (2770), 19 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:43,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:19:43,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:19:43,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:19:54,344 INFO L124 PetriNetUnfolderBase]: 4550/9203 cut-off events. [2023-11-06 22:19:54,344 INFO L125 PetriNetUnfolderBase]: For 273454/273454 co-relation queries the response was YES. [2023-11-06 22:19:54,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104020 conditions, 9203 events. 4550/9203 cut-off events. For 273454/273454 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 79010 event pairs, 123 based on Foata normal form. 20/9223 useless extension candidates. Maximal degree in co-relation 103187. Up to 3845 conditions per place. [2023-11-06 22:19:54,486 INFO L140 encePairwiseOnDemand]: 350/357 looper letters, 1146 selfloop transitions, 948 changer transitions 16/2110 dead transitions. [2023-11-06 22:19:54,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 2110 transitions, 56152 flow [2023-11-06 22:19:54,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:19:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 22:19:54,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5116 transitions. [2023-11-06 22:19:54,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42148624155544573 [2023-11-06 22:19:54,493 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5116 transitions. [2023-11-06 22:19:54,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5116 transitions. [2023-11-06 22:19:54,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:19:54,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5116 transitions. [2023-11-06 22:19:54,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 150.47058823529412) internal successors, (5116), 34 states have internal predecessors, (5116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:54,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 357.0) internal successors, (12495), 35 states have internal predecessors, (12495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:54,512 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 357.0) internal successors, (12495), 35 states have internal predecessors, (12495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:54,513 INFO L175 Difference]: Start difference. First operand has 418 places, 1359 transitions, 34477 flow. Second operand 34 states and 5116 transitions. [2023-11-06 22:19:54,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 2110 transitions, 56152 flow [2023-11-06 22:20:01,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 2110 transitions, 54932 flow, removed 474 selfloop flow, removed 11 redundant places. [2023-11-06 22:20:01,896 INFO L231 Difference]: Finished difference. Result has 457 places, 1717 transitions, 46870 flow [2023-11-06 22:20:01,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=33452, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=645, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=46870, PETRI_PLACES=457, PETRI_TRANSITIONS=1717} [2023-11-06 22:20:01,898 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 436 predicate places. [2023-11-06 22:20:01,899 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1717 transitions, 46870 flow [2023-11-06 22:20:01,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 145.78947368421052) internal successors, (2770), 19 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:01,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:01,899 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:01,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:20:02,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:02,100 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:02,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:02,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1248400909, now seen corresponding path program 21 times [2023-11-06 22:20:02,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:02,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508525313] [2023-11-06 22:20:02,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:02,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:20:02,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:02,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508525313] [2023-11-06 22:20:02,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508525313] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:02,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223425161] [2023-11-06 22:20:02,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:20:02,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:02,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:02,408 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:02,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:20:02,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:20:02,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:20:02,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:20:02,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:20:02,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:20:02,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223425161] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:02,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:02,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-06 22:20:02,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551361200] [2023-11-06 22:20:02,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:02,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:20:02,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:02,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:20:02,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:20:03,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:20:03,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1717 transitions, 46870 flow. Second operand has 18 states, 18 states have (on average 145.83333333333334) internal successors, (2625), 18 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:03,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:03,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:20:03,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:06,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:20:14,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:20:17,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:20:28,058 INFO L124 PetriNetUnfolderBase]: 4853/9895 cut-off events. [2023-11-06 22:20:28,059 INFO L125 PetriNetUnfolderBase]: For 337451/337451 co-relation queries the response was YES. [2023-11-06 22:20:28,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116738 conditions, 9895 events. 4853/9895 cut-off events. For 337451/337451 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 86616 event pairs, 74 based on Foata normal form. 96/9991 useless extension candidates. Maximal degree in co-relation 116499. Up to 4214 conditions per place. [2023-11-06 22:20:28,266 INFO L140 encePairwiseOnDemand]: 350/357 looper letters, 963 selfloop transitions, 1306 changer transitions 31/2300 dead transitions. [2023-11-06 22:20:28,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 2300 transitions, 64108 flow [2023-11-06 22:20:28,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-06 22:20:28,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-06 22:20:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 7301 transitions. [2023-11-06 22:20:28,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173669467787115 [2023-11-06 22:20:28,275 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 7301 transitions. [2023-11-06 22:20:28,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 7301 transitions. [2023-11-06 22:20:28,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:28,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 7301 transitions. [2023-11-06 22:20:28,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 149.0) internal successors, (7301), 49 states have internal predecessors, (7301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:28,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 357.0) internal successors, (17850), 50 states have internal predecessors, (17850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:28,295 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 357.0) internal successors, (17850), 50 states have internal predecessors, (17850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:28,295 INFO L175 Difference]: Start difference. First operand has 457 places, 1717 transitions, 46870 flow. Second operand 49 states and 7301 transitions. [2023-11-06 22:20:28,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 2300 transitions, 64108 flow [2023-11-06 22:20:36,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 2300 transitions, 62433 flow, removed 530 selfloop flow, removed 22 redundant places. [2023-11-06 22:20:36,641 INFO L231 Difference]: Finished difference. Result has 491 places, 2019 transitions, 57205 flow [2023-11-06 22:20:36,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=45267, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1011, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=57205, PETRI_PLACES=491, PETRI_TRANSITIONS=2019} [2023-11-06 22:20:36,644 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 470 predicate places. [2023-11-06 22:20:36,644 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 2019 transitions, 57205 flow [2023-11-06 22:20:36,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 145.83333333333334) internal successors, (2625), 18 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:36,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:20:36,645 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:20:36,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:20:36,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-06 22:20:36,853 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:20:36,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:20:36,854 INFO L85 PathProgramCache]: Analyzing trace with hash -518924851, now seen corresponding path program 22 times [2023-11-06 22:20:36,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:20:36,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728107718] [2023-11-06 22:20:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:20:36,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:20:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:20:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:20:37,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:20:37,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728107718] [2023-11-06 22:20:37,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728107718] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:20:37,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705841967] [2023-11-06 22:20:37,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:20:37,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:20:37,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:20:37,225 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:20:37,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:20:37,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:20:37,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:20:37,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:20:37,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:20:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:20:37,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:20:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:20:37,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705841967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:20:37,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:20:37,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-06 22:20:37,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309153701] [2023-11-06 22:20:37,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:20:37,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:20:37,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:20:37,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:20:37,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:20:37,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:20:37,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 2019 transitions, 57205 flow. Second operand has 18 states, 18 states have (on average 146.44444444444446) internal successors, (2636), 18 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:37,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:20:37,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:20:37,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:20:52,304 INFO L124 PetriNetUnfolderBase]: 4996/10131 cut-off events. [2023-11-06 22:20:52,304 INFO L125 PetriNetUnfolderBase]: For 370539/370539 co-relation queries the response was YES. [2023-11-06 22:20:52,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123703 conditions, 10131 events. 4996/10131 cut-off events. For 370539/370539 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 88826 event pairs, 79 based on Foata normal form. 62/10193 useless extension candidates. Maximal degree in co-relation 122537. Up to 4244 conditions per place. [2023-11-06 22:20:52,655 INFO L140 encePairwiseOnDemand]: 350/357 looper letters, 1158 selfloop transitions, 1041 changer transitions 1/2200 dead transitions. [2023-11-06 22:20:52,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 2200 transitions, 65032 flow [2023-11-06 22:20:52,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 22:20:52,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-06 22:20:52,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4924 transitions. [2023-11-06 22:20:52,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4179611238434768 [2023-11-06 22:20:52,662 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4924 transitions. [2023-11-06 22:20:52,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4924 transitions. [2023-11-06 22:20:52,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:20:52,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4924 transitions. [2023-11-06 22:20:52,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 149.21212121212122) internal successors, (4924), 33 states have internal predecessors, (4924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:52,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 357.0) internal successors, (12138), 34 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:52,681 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 357.0) internal successors, (12138), 34 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:20:52,681 INFO L175 Difference]: Start difference. First operand has 491 places, 2019 transitions, 57205 flow. Second operand 33 states and 4924 transitions. [2023-11-06 22:20:52,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 2200 transitions, 65032 flow [2023-11-06 22:21:03,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 2200 transitions, 62251 flow, removed 920 selfloop flow, removed 23 redundant places. [2023-11-06 22:21:03,457 INFO L231 Difference]: Finished difference. Result has 506 places, 2118 transitions, 59338 flow [2023-11-06 22:21:03,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=54583, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2014, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=951, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1028, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=59338, PETRI_PLACES=506, PETRI_TRANSITIONS=2118} [2023-11-06 22:21:03,460 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 485 predicate places. [2023-11-06 22:21:03,460 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 2118 transitions, 59338 flow [2023-11-06 22:21:03,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 146.44444444444446) internal successors, (2636), 18 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:03,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:03,461 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:03,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:21:03,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-06 22:21:03,667 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:21:03,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:03,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1552472559, now seen corresponding path program 23 times [2023-11-06 22:21:03,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:03,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045567944] [2023-11-06 22:21:03,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:03,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:21:03,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:03,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045567944] [2023-11-06 22:21:03,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045567944] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:03,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745707081] [2023-11-06 22:21:03,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:21:03,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:03,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:03,909 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:03,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:21:04,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:21:04,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:21:04,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:21:04,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:21:04,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:21:04,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745707081] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:04,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:21:04,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-06 22:21:04,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879865994] [2023-11-06 22:21:04,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:04,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:21:04,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:04,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:21:04,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:21:04,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:21:04,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 2118 transitions, 59338 flow. Second operand has 17 states, 17 states have (on average 146.11764705882354) internal successors, (2484), 17 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:04,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:04,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:21:04,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:21:17,153 INFO L124 PetriNetUnfolderBase]: 5017/10176 cut-off events. [2023-11-06 22:21:17,153 INFO L125 PetriNetUnfolderBase]: For 385116/385116 co-relation queries the response was YES. [2023-11-06 22:21:17,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123409 conditions, 10176 events. 5017/10176 cut-off events. For 385116/385116 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 89277 event pairs, 168 based on Foata normal form. 12/10188 useless extension candidates. Maximal degree in co-relation 122677. Up to 6732 conditions per place. [2023-11-06 22:21:17,351 INFO L140 encePairwiseOnDemand]: 351/357 looper letters, 1260 selfloop transitions, 900 changer transitions 1/2161 dead transitions. [2023-11-06 22:21:17,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 2161 transitions, 64301 flow [2023-11-06 22:21:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:21:17,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:21:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2248 transitions. [2023-11-06 22:21:17,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41979458450046686 [2023-11-06 22:21:17,354 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2248 transitions. [2023-11-06 22:21:17,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2248 transitions. [2023-11-06 22:21:17,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:21:17,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2248 transitions. [2023-11-06 22:21:17,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 149.86666666666667) internal successors, (2248), 15 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:17,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 357.0) internal successors, (5712), 16 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:17,360 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 357.0) internal successors, (5712), 16 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:17,360 INFO L175 Difference]: Start difference. First operand has 506 places, 2118 transitions, 59338 flow. Second operand 15 states and 2248 transitions. [2023-11-06 22:21:17,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 2161 transitions, 64301 flow [2023-11-06 22:21:29,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 2161 transitions, 61253 flow, removed 405 selfloop flow, removed 18 redundant places. [2023-11-06 22:21:29,213 INFO L231 Difference]: Finished difference. Result has 505 places, 2126 transitions, 58393 flow [2023-11-06 22:21:29,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=357, PETRI_DIFFERENCE_MINUEND_FLOW=56390, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=894, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=58393, PETRI_PLACES=505, PETRI_TRANSITIONS=2126} [2023-11-06 22:21:29,216 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 484 predicate places. [2023-11-06 22:21:29,216 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 2126 transitions, 58393 flow [2023-11-06 22:21:29,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 146.11764705882354) internal successors, (2484), 17 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:29,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:21:29,216 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:21:29,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-06 22:21:29,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:29,417 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:21:29,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:21:29,417 INFO L85 PathProgramCache]: Analyzing trace with hash -154358955, now seen corresponding path program 24 times [2023-11-06 22:21:29,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:21:29,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695305136] [2023-11-06 22:21:29,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:21:29,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:21:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:21:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:21:29,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:21:29,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695305136] [2023-11-06 22:21:29,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695305136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:21:29,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406701006] [2023-11-06 22:21:29,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:21:29,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:21:29,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:21:29,619 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:21:29,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c4a125f-44a6-4b74-bd27-22c7035da401/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 22:21:29,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-06 22:21:29,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:21:29,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:21:29,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:21:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:21:29,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:21:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:21:30,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406701006] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:21:30,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:21:30,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2023-11-06 22:21:30,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180330431] [2023-11-06 22:21:30,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:21:30,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:21:30,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:21:30,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:21:30,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:21:30,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 357 [2023-11-06 22:21:30,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 2126 transitions, 58393 flow. Second operand has 17 states, 17 states have (on average 145.8235294117647) internal successors, (2479), 17 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:21:30,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:21:30,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 357 [2023-11-06 22:21:30,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand