./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/bench-exp3x3-opt.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_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/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_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/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_2e3223d6-1443-43fa-a14a-f1f32c66841d/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 4c1c24b29e2a448aa58292c6eb9ff7da7a6479c4a0ee37fcfe55a998096eea30 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:42:48,163 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:42:48,254 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:42:48,261 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:42:48,262 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:42:48,321 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:42:48,322 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:42:48,323 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:42:48,325 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:42:48,331 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:42:48,332 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:42:48,332 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:42:48,333 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:42:48,335 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:42:48,336 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:42:48,336 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:42:48,337 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:42:48,337 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:42:48,338 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:42:48,339 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:42:48,339 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:42:48,340 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:42:48,341 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:42:48,341 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:42:48,342 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:42:48,343 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:42:48,344 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:42:48,344 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:42:48,345 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:42:48,345 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:42:48,347 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:42:48,347 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:42:48,348 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:42:48,348 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:42:48,348 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:42:48,349 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:42:48,349 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:42:48,349 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:42:48,350 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:42:48,350 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_2e3223d6-1443-43fa-a14a-f1f32c66841d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c1c24b29e2a448aa58292c6eb9ff7da7a6479c4a0ee37fcfe55a998096eea30 [2023-11-06 22:42:48,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:42:48,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:42:48,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:42:48,724 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:42:48,725 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:42:48,726 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c [2023-11-06 22:42:52,162 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:42:52,527 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:42:52,528 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c [2023-11-06 22:42:52,539 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/data/c2e76b37a/930b2c1286e84686b8df004d4a106e6d/FLAG661cd71ff [2023-11-06 22:42:52,560 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/data/c2e76b37a/930b2c1286e84686b8df004d4a106e6d [2023-11-06 22:42:52,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:42:52,571 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:42:52,577 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:42:52,578 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:42:52,583 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:42:52,584 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:52" (1/1) ... [2023-11-06 22:42:52,585 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17a5785c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:52, skipping insertion in model container [2023-11-06 22:42:52,585 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:52" (1/1) ... [2023-11-06 22:42:52,622 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:42:52,815 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_2e3223d6-1443-43fa-a14a-f1f32c66841d/sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c[2826,2839] [2023-11-06 22:42:52,822 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:42:52,842 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:42:52,903 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_2e3223d6-1443-43fa-a14a-f1f32c66841d/sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c[2826,2839] [2023-11-06 22:42:52,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:42:52,924 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:42:52,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:52 WrapperNode [2023-11-06 22:42:52,925 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:42:52,927 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:42:52,927 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:42:52,927 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:42:52,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:52" (1/1) ... [2023-11-06 22:42:52,948 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:52" (1/1) ... [2023-11-06 22:42:52,988 INFO L138 Inliner]: procedures = 25, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 131 [2023-11-06 22:42:52,988 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:42:52,989 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:42:52,989 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:42:52,989 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:42:53,001 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:52" (1/1) ... [2023-11-06 22:42:53,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:52" (1/1) ... [2023-11-06 22:42:53,006 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:52" (1/1) ... [2023-11-06 22:42:53,007 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:52" (1/1) ... [2023-11-06 22:42:53,016 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:52" (1/1) ... [2023-11-06 22:42:53,021 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:52" (1/1) ... [2023-11-06 22:42:53,024 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:52" (1/1) ... [2023-11-06 22:42:53,026 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:52" (1/1) ... [2023-11-06 22:42:53,030 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:42:53,032 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:42:53,032 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:42:53,032 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:42:53,033 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:52" (1/1) ... [2023-11-06 22:42:53,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:42:53,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:53,077 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:42:53,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:42:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:42:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:42:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:42:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:42:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:42:53,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:42:53,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:42:53,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:42:53,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:42:53,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:42:53,152 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 22:42:53,152 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 22:42:53,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:42:53,152 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-06 22:42:53,152 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-06 22:42:53,153 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-11-06 22:42:53,153 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-11-06 22:42:53,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:42:53,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:42:53,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:42:53,155 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 22:42:53,306 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:42:53,308 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:42:53,665 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:42:53,676 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:42:53,677 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-06 22:42:53,680 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:53 BoogieIcfgContainer [2023-11-06 22:42:53,680 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:42:53,683 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:42:53,683 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:42:53,687 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:42:53,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:42:52" (1/3) ... [2023-11-06 22:42:53,689 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590fed90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:53, skipping insertion in model container [2023-11-06 22:42:53,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:52" (2/3) ... [2023-11-06 22:42:53,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590fed90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:53, skipping insertion in model container [2023-11-06 22:42:53,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:53" (3/3) ... [2023-11-06 22:42:53,695 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp3x3-opt.wvr.c [2023-11-06 22:42:53,704 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:42:53,715 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:42:53,715 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:42:53,715 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:42:53,877 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-11-06 22:42:53,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 172 transitions, 386 flow [2023-11-06 22:42:54,121 INFO L124 PetriNetUnfolderBase]: 14/166 cut-off events. [2023-11-06 22:42:54,122 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:42:54,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 166 events. 14/166 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 123. Up to 2 conditions per place. [2023-11-06 22:42:54,149 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 172 transitions, 386 flow [2023-11-06 22:42:54,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 149 transitions, 334 flow [2023-11-06 22:42:54,161 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:42:54,175 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 149 transitions, 334 flow [2023-11-06 22:42:54,178 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 149 transitions, 334 flow [2023-11-06 22:42:54,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 149 transitions, 334 flow [2023-11-06 22:42:54,241 INFO L124 PetriNetUnfolderBase]: 14/149 cut-off events. [2023-11-06 22:42:54,242 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:42:54,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 149 events. 14/149 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 123. Up to 2 conditions per place. [2023-11-06 22:42:54,248 INFO L119 LiptonReduction]: Number of co-enabled transitions 2916 [2023-11-06 22:43:02,181 INFO L134 LiptonReduction]: Checked pairs total: 3545 [2023-11-06 22:43:02,182 INFO L136 LiptonReduction]: Total number of compositions: 126 [2023-11-06 22:43:02,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:43:02,211 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;@29affd66, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:43:02,211 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 22:43:02,223 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:43:02,223 INFO L124 PetriNetUnfolderBase]: 6/36 cut-off events. [2023-11-06 22:43:02,223 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:43:02,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:02,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:02,225 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:43:02,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:02,233 INFO L85 PathProgramCache]: Analyzing trace with hash 132577605, now seen corresponding path program 1 times [2023-11-06 22:43:02,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:02,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943243902] [2023-11-06 22:43:02,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:02,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:02,957 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 22:43:02,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:02,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943243902] [2023-11-06 22:43:02,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943243902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:02,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:02,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:43:02,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987577878] [2023-11-06 22:43:02,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:02,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:02,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:03,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:03,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:03,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 298 [2023-11-06 22:43:03,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:03,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:03,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 298 [2023-11-06 22:43:03,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:03,824 INFO L124 PetriNetUnfolderBase]: 3277/3973 cut-off events. [2023-11-06 22:43:03,824 INFO L125 PetriNetUnfolderBase]: For 321/321 co-relation queries the response was YES. [2023-11-06 22:43:03,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8270 conditions, 3973 events. 3277/3973 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10707 event pairs, 837 based on Foata normal form. 1/2272 useless extension candidates. Maximal degree in co-relation 5564. Up to 2141 conditions per place. [2023-11-06 22:43:03,871 INFO L140 encePairwiseOnDemand]: 294/298 looper letters, 59 selfloop transitions, 3 changer transitions 1/63 dead transitions. [2023-11-06 22:43:03,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 309 flow [2023-11-06 22:43:03,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:43:03,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:43:03,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-11-06 22:43:03,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558165548098434 [2023-11-06 22:43:03,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-11-06 22:43:03,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-11-06 22:43:03,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:03,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-11-06 22:43:03,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:03,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:03,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:03,935 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 110 flow. Second operand 3 states and 499 transitions. [2023-11-06 22:43:03,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 309 flow [2023-11-06 22:43:03,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 63 transitions, 271 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-06 22:43:03,953 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 105 flow [2023-11-06 22:43:03,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-11-06 22:43:03,960 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -9 predicate places. [2023-11-06 22:43:03,960 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 105 flow [2023-11-06 22:43:03,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:03,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:03,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:03,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:43:03,963 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:43:03,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:03,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1311427419, now seen corresponding path program 1 times [2023-11-06 22:43:03,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:03,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021070870] [2023-11-06 22:43:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:03,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:04,241 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 22:43:04,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:04,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021070870] [2023-11-06 22:43:04,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021070870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:04,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:04,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:43:04,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066348296] [2023-11-06 22:43:04,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:04,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:04,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:04,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:04,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:04,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 298 [2023-11-06 22:43:04,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:04,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:04,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 298 [2023-11-06 22:43:04,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:05,434 INFO L124 PetriNetUnfolderBase]: 6533/7911 cut-off events. [2023-11-06 22:43:05,435 INFO L125 PetriNetUnfolderBase]: For 1160/1160 co-relation queries the response was YES. [2023-11-06 22:43:05,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17703 conditions, 7911 events. 6533/7911 cut-off events. For 1160/1160 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 24283 event pairs, 1731 based on Foata normal form. 1/5646 useless extension candidates. Maximal degree in co-relation 7381. Up to 4572 conditions per place. [2023-11-06 22:43:05,500 INFO L140 encePairwiseOnDemand]: 294/298 looper letters, 63 selfloop transitions, 3 changer transitions 5/71 dead transitions. [2023-11-06 22:43:05,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 71 transitions, 330 flow [2023-11-06 22:43:05,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:43:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:43:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-11-06 22:43:05,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626398210290827 [2023-11-06 22:43:05,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-11-06 22:43:05,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-11-06 22:43:05,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:05,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-11-06 22:43:05,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:05,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:05,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:05,517 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 105 flow. Second operand 3 states and 503 transitions. [2023-11-06 22:43:05,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 71 transitions, 330 flow [2023-11-06 22:43:05,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 71 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:43:05,528 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 121 flow [2023-11-06 22:43:05,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-11-06 22:43:05,530 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2023-11-06 22:43:05,530 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 121 flow [2023-11-06 22:43:05,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:05,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:05,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:05,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:43:05,532 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:43:05,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:05,535 INFO L85 PathProgramCache]: Analyzing trace with hash 670611524, now seen corresponding path program 1 times [2023-11-06 22:43:05,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:05,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871010728] [2023-11-06 22:43:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:05,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:43:05,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:05,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871010728] [2023-11-06 22:43:05,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871010728] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:05,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:05,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:43:05,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408166374] [2023-11-06 22:43:05,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:05,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:05,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:05,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:05,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:05,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 298 [2023-11-06 22:43:05,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:05,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:05,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 298 [2023-11-06 22:43:05,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:07,765 INFO L124 PetriNetUnfolderBase]: 13065/15819 cut-off events. [2023-11-06 22:43:07,765 INFO L125 PetriNetUnfolderBase]: For 4762/4762 co-relation queries the response was YES. [2023-11-06 22:43:07,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38060 conditions, 15819 events. 13065/15819 cut-off events. For 4762/4762 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 53894 event pairs, 3763 based on Foata normal form. 1/13816 useless extension candidates. Maximal degree in co-relation 16775. Up to 8912 conditions per place. [2023-11-06 22:43:07,884 INFO L140 encePairwiseOnDemand]: 294/298 looper letters, 67 selfloop transitions, 3 changer transitions 9/79 dead transitions. [2023-11-06 22:43:07,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 79 transitions, 384 flow [2023-11-06 22:43:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:43:07,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:43:07,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 507 transitions. [2023-11-06 22:43:07,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5671140939597316 [2023-11-06 22:43:07,889 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 507 transitions. [2023-11-06 22:43:07,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 507 transitions. [2023-11-06 22:43:07,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:07,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 507 transitions. [2023-11-06 22:43:07,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:07,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:07,897 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:07,897 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 121 flow. Second operand 3 states and 507 transitions. [2023-11-06 22:43:07,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 79 transitions, 384 flow [2023-11-06 22:43:07,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 79 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:43:07,904 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 137 flow [2023-11-06 22:43:07,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-11-06 22:43:07,906 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2023-11-06 22:43:07,911 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 137 flow [2023-11-06 22:43:07,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:07,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:07,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:07,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:43:07,914 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:43:07,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:07,915 INFO L85 PathProgramCache]: Analyzing trace with hash 281360992, now seen corresponding path program 1 times [2023-11-06 22:43:07,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:07,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972506189] [2023-11-06 22:43:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:07,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:43:08,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:08,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972506189] [2023-11-06 22:43:08,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972506189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:08,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:08,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:43:08,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063398972] [2023-11-06 22:43:08,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:08,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:43:08,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:08,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:43:08,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:43:08,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 298 [2023-11-06 22:43:08,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:08,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:08,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 298 [2023-11-06 22:43:08,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:10,207 INFO L124 PetriNetUnfolderBase]: 12719/15473 cut-off events. [2023-11-06 22:43:10,207 INFO L125 PetriNetUnfolderBase]: For 6425/6425 co-relation queries the response was YES. [2023-11-06 22:43:10,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38421 conditions, 15473 events. 12719/15473 cut-off events. For 6425/6425 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 55263 event pairs, 539 based on Foata normal form. 346/15819 useless extension candidates. Maximal degree in co-relation 17021. Up to 6006 conditions per place. [2023-11-06 22:43:10,288 INFO L140 encePairwiseOnDemand]: 293/298 looper letters, 108 selfloop transitions, 6 changer transitions 16/130 dead transitions. [2023-11-06 22:43:10,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 130 transitions, 645 flow [2023-11-06 22:43:10,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:43:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:43:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 810 transitions. [2023-11-06 22:43:10,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436241610738255 [2023-11-06 22:43:10,294 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 810 transitions. [2023-11-06 22:43:10,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 810 transitions. [2023-11-06 22:43:10,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:10,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 810 transitions. [2023-11-06 22:43:10,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:10,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:10,306 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:10,306 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 137 flow. Second operand 5 states and 810 transitions. [2023-11-06 22:43:10,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 130 transitions, 645 flow [2023-11-06 22:43:10,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 130 transitions, 641 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:43:10,314 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 158 flow [2023-11-06 22:43:10,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-11-06 22:43:10,316 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-11-06 22:43:10,316 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 158 flow [2023-11-06 22:43:10,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:10,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:10,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:10,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:43:10,318 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:43:10,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:10,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1193569, now seen corresponding path program 1 times [2023-11-06 22:43:10,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:10,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428861076] [2023-11-06 22:43:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:10,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:10,513 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 22:43:10,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:10,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428861076] [2023-11-06 22:43:10,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428861076] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:10,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647122569] [2023-11-06 22:43:10,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:10,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:10,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:10,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:10,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:43:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:10,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:43:10,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:10,893 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 22:43:10,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:11,000 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 22:43:11,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647122569] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:11,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:43:11,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-11-06 22:43:11,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919617223] [2023-11-06 22:43:11,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:11,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:43:11,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:11,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:43:11,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:43:11,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 298 [2023-11-06 22:43:11,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 158 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 22:43:11,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:11,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 298 [2023-11-06 22:43:11,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:13,470 INFO L124 PetriNetUnfolderBase]: 15789/19359 cut-off events. [2023-11-06 22:43:13,471 INFO L125 PetriNetUnfolderBase]: For 11314/11314 co-relation queries the response was YES. [2023-11-06 22:43:13,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51923 conditions, 19359 events. 15789/19359 cut-off events. For 11314/11314 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 72131 event pairs, 2965 based on Foata normal form. 557/19916 useless extension candidates. Maximal degree in co-relation 25277. Up to 7662 conditions per place. [2023-11-06 22:43:13,722 INFO L140 encePairwiseOnDemand]: 292/298 looper letters, 121 selfloop transitions, 6 changer transitions 11/138 dead transitions. [2023-11-06 22:43:13,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 138 transitions, 747 flow [2023-11-06 22:43:13,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:43:13,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:43:13,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 812 transitions. [2023-11-06 22:43:13,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5449664429530201 [2023-11-06 22:43:13,727 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 812 transitions. [2023-11-06 22:43:13,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 812 transitions. [2023-11-06 22:43:13,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:13,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 812 transitions. [2023-11-06 22:43:13,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 162.4) internal successors, (812), 5 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:13,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:13,738 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:13,739 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 158 flow. Second operand 5 states and 812 transitions. [2023-11-06 22:43:13,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 138 transitions, 747 flow [2023-11-06 22:43:13,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 138 transitions, 734 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:43:13,747 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 191 flow [2023-11-06 22:43:13,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=191, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-11-06 22:43:13,750 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2023-11-06 22:43:13,751 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 191 flow [2023-11-06 22:43:13,752 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 22:43:13,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:13,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:13,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:13,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:13,960 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:43:13,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:13,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1714370423, now seen corresponding path program 1 times [2023-11-06 22:43:13,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:13,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206927832] [2023-11-06 22:43:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:13,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:14,141 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 22:43:14,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:14,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206927832] [2023-11-06 22:43:14,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206927832] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:14,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816747690] [2023-11-06 22:43:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:14,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:14,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:14,153 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:14,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:43:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:14,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:43:14,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:14,426 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 22:43:14,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:14,503 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 22:43:14,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816747690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:14,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:43:14,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-11-06 22:43:14,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282873105] [2023-11-06 22:43:14,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:14,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:43:14,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:14,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:43:14,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:43:14,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 298 [2023-11-06 22:43:14,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 191 flow. Second operand has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:14,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:14,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 298 [2023-11-06 22:43:14,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:17,569 INFO L124 PetriNetUnfolderBase]: 24369/29977 cut-off events. [2023-11-06 22:43:17,570 INFO L125 PetriNetUnfolderBase]: For 32538/32538 co-relation queries the response was YES. [2023-11-06 22:43:17,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90363 conditions, 29977 events. 24369/29977 cut-off events. For 32538/32538 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 120532 event pairs, 4085 based on Foata normal form. 837/30492 useless extension candidates. Maximal degree in co-relation 40819. Up to 12614 conditions per place. [2023-11-06 22:43:17,701 INFO L140 encePairwiseOnDemand]: 292/298 looper letters, 122 selfloop transitions, 6 changer transitions 23/151 dead transitions. [2023-11-06 22:43:17,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 151 transitions, 864 flow [2023-11-06 22:43:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:43:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:43:17,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 820 transitions. [2023-11-06 22:43:17,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5503355704697986 [2023-11-06 22:43:17,706 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 820 transitions. [2023-11-06 22:43:17,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 820 transitions. [2023-11-06 22:43:17,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:17,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 820 transitions. [2023-11-06 22:43:17,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:17,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:17,716 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:17,716 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 191 flow. Second operand 5 states and 820 transitions. [2023-11-06 22:43:17,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 151 transitions, 864 flow [2023-11-06 22:43:17,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 151 transitions, 847 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-06 22:43:17,741 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 215 flow [2023-11-06 22:43:17,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-11-06 22:43:17,744 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2023-11-06 22:43:17,745 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 215 flow [2023-11-06 22:43:17,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:17,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:17,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:17,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:17,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:17,952 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:43:17,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash -160627158, now seen corresponding path program 1 times [2023-11-06 22:43:17,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:17,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744287614] [2023-11-06 22:43:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:17,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:43:18,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:18,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744287614] [2023-11-06 22:43:18,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744287614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:18,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:18,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:43:18,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349208751] [2023-11-06 22:43:18,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:18,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:43:18,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:18,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:43:18,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:43:18,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 298 [2023-11-06 22:43:18,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 215 flow. Second operand has 4 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:18,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:18,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 298 [2023-11-06 22:43:18,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:20,072 INFO L124 PetriNetUnfolderBase]: 14913/18117 cut-off events. [2023-11-06 22:43:20,072 INFO L125 PetriNetUnfolderBase]: For 25319/25319 co-relation queries the response was YES. [2023-11-06 22:43:20,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60641 conditions, 18117 events. 14913/18117 cut-off events. For 25319/25319 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 66615 event pairs, 453 based on Foata normal form. 262/18379 useless extension candidates. Maximal degree in co-relation 32795. Up to 6755 conditions per place. [2023-11-06 22:43:20,161 INFO L140 encePairwiseOnDemand]: 293/298 looper letters, 99 selfloop transitions, 4 changer transitions 39/142 dead transitions. [2023-11-06 22:43:20,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 142 transitions, 887 flow [2023-11-06 22:43:20,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:43:20,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:43:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 806 transitions. [2023-11-06 22:43:20,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409395973154363 [2023-11-06 22:43:20,173 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 806 transitions. [2023-11-06 22:43:20,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 806 transitions. [2023-11-06 22:43:20,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:20,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 806 transitions. [2023-11-06 22:43:20,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:20,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:20,185 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:20,186 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 215 flow. Second operand 5 states and 806 transitions. [2023-11-06 22:43:20,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 142 transitions, 887 flow [2023-11-06 22:43:20,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 142 transitions, 858 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-11-06 22:43:20,374 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 217 flow [2023-11-06 22:43:20,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2023-11-06 22:43:20,375 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2023-11-06 22:43:20,376 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 217 flow [2023-11-06 22:43:20,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:20,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:20,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:20,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:43:20,378 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:43:20,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:20,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1419174004, now seen corresponding path program 2 times [2023-11-06 22:43:20,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:20,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974937719] [2023-11-06 22:43:20,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:20,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:20,581 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 22:43:20,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:20,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974937719] [2023-11-06 22:43:20,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974937719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:20,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79182048] [2023-11-06 22:43:20,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:43:20,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:20,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:20,585 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:20,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:43:20,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:43:20,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:20,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:43:20,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:20,885 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 22:43:20,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:20,981 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 22:43:20,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79182048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:20,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:43:20,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:43:20,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719946369] [2023-11-06 22:43:20,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:20,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:43:20,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:20,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:43:20,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:43:21,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 298 [2023-11-06 22:43:21,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 217 flow. Second operand has 7 states, 7 states have (on average 138.57142857142858) internal successors, (970), 7 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:21,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:21,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 298 [2023-11-06 22:43:21,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:23,914 INFO L124 PetriNetUnfolderBase]: 14631/17636 cut-off events. [2023-11-06 22:43:23,914 INFO L125 PetriNetUnfolderBase]: For 29990/29990 co-relation queries the response was YES. [2023-11-06 22:43:23,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62129 conditions, 17636 events. 14631/17636 cut-off events. For 29990/29990 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 61684 event pairs, 257 based on Foata normal form. 875/18511 useless extension candidates. Maximal degree in co-relation 35647. Up to 4859 conditions per place. [2023-11-06 22:43:24,043 INFO L140 encePairwiseOnDemand]: 288/298 looper letters, 309 selfloop transitions, 41 changer transitions 6/356 dead transitions. [2023-11-06 22:43:24,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 356 transitions, 2416 flow [2023-11-06 22:43:24,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:43:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:43:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2474 transitions. [2023-11-06 22:43:24,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883537307540466 [2023-11-06 22:43:24,060 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2474 transitions. [2023-11-06 22:43:24,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2474 transitions. [2023-11-06 22:43:24,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:24,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2474 transitions. [2023-11-06 22:43:24,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 145.52941176470588) internal successors, (2474), 17 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:24,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 298.0) internal successors, (5364), 18 states have internal predecessors, (5364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:24,088 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 298.0) internal successors, (5364), 18 states have internal predecessors, (5364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:24,088 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 217 flow. Second operand 17 states and 2474 transitions. [2023-11-06 22:43:24,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 356 transitions, 2416 flow [2023-11-06 22:43:24,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 356 transitions, 2379 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 22:43:24,153 INFO L231 Difference]: Finished difference. Result has 88 places, 91 transitions, 615 flow [2023-11-06 22:43:24,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=615, PETRI_PLACES=88, PETRI_TRANSITIONS=91} [2023-11-06 22:43:24,156 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 38 predicate places. [2023-11-06 22:43:24,159 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 91 transitions, 615 flow [2023-11-06 22:43:24,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 138.57142857142858) internal successors, (970), 7 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:24,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:24,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:24,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:24,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:24,370 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:43:24,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:24,371 INFO L85 PathProgramCache]: Analyzing trace with hash 2093314485, now seen corresponding path program 1 times [2023-11-06 22:43:24,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:24,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329831317] [2023-11-06 22:43:24,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:24,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:43:24,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:24,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329831317] [2023-11-06 22:43:24,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329831317] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:24,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848656745] [2023-11-06 22:43:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:24,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:24,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:24,556 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:24,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:43:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:24,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:43:24,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:43:24,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:43:24,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848656745] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:24,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:43:24,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-11-06 22:43:24,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829198426] [2023-11-06 22:43:24,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:24,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:43:24,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:24,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:43:24,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:43:25,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 298 [2023-11-06 22:43:25,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 91 transitions, 615 flow. Second operand has 5 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:25,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:25,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 298 [2023-11-06 22:43:25,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:27,658 INFO L124 PetriNetUnfolderBase]: 18679/22488 cut-off events. [2023-11-06 22:43:27,658 INFO L125 PetriNetUnfolderBase]: For 140118/140118 co-relation queries the response was YES. [2023-11-06 22:43:27,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106865 conditions, 22488 events. 18679/22488 cut-off events. For 140118/140118 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 82741 event pairs, 655 based on Foata normal form. 804/23292 useless extension candidates. Maximal degree in co-relation 96577. Up to 16295 conditions per place. [2023-11-06 22:43:27,824 INFO L140 encePairwiseOnDemand]: 293/298 looper letters, 289 selfloop transitions, 6 changer transitions 0/295 dead transitions. [2023-11-06 22:43:27,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 295 transitions, 2732 flow [2023-11-06 22:43:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:43:27,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:43:27,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 793 transitions. [2023-11-06 22:43:27,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5322147651006711 [2023-11-06 22:43:27,829 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 793 transitions. [2023-11-06 22:43:27,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 793 transitions. [2023-11-06 22:43:27,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:27,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 793 transitions. [2023-11-06 22:43:27,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.6) internal successors, (793), 5 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:27,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:27,837 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:27,838 INFO L175 Difference]: Start difference. First operand has 88 places, 91 transitions, 615 flow. Second operand 5 states and 793 transitions. [2023-11-06 22:43:27,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 295 transitions, 2732 flow [2023-11-06 22:43:28,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 295 transitions, 2426 flow, removed 120 selfloop flow, removed 2 redundant places. [2023-11-06 22:43:28,153 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 578 flow [2023-11-06 22:43:28,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=578, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2023-11-06 22:43:28,154 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 42 predicate places. [2023-11-06 22:43:28,154 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 578 flow [2023-11-06 22:43:28,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:28,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:28,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:28,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:28,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:28,362 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:43:28,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:28,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1229692798, now seen corresponding path program 1 times [2023-11-06 22:43:28,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:28,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640258020] [2023-11-06 22:43:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:28,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:43:28,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:28,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640258020] [2023-11-06 22:43:28,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640258020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:28,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:28,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:43:28,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347971388] [2023-11-06 22:43:28,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:28,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:43:28,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:28,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:43:28,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:43:28,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 298 [2023-11-06 22:43:28,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 578 flow. Second operand has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:28,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:28,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 298 [2023-11-06 22:43:28,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:31,480 INFO L124 PetriNetUnfolderBase]: 18435/22244 cut-off events. [2023-11-06 22:43:31,480 INFO L125 PetriNetUnfolderBase]: For 126140/126140 co-relation queries the response was YES. [2023-11-06 22:43:31,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110575 conditions, 22244 events. 18435/22244 cut-off events. For 126140/126140 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 78865 event pairs, 994 based on Foata normal form. 244/22488 useless extension candidates. Maximal degree in co-relation 100544. Up to 8587 conditions per place. [2023-11-06 22:43:31,627 INFO L140 encePairwiseOnDemand]: 293/298 looper letters, 150 selfloop transitions, 10 changer transitions 62/222 dead transitions. [2023-11-06 22:43:31,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 222 transitions, 1863 flow [2023-11-06 22:43:31,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:43:31,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:43:31,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 802 transitions. [2023-11-06 22:43:31,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538255033557047 [2023-11-06 22:43:31,632 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 802 transitions. [2023-11-06 22:43:31,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 802 transitions. [2023-11-06 22:43:31,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:31,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 802 transitions. [2023-11-06 22:43:31,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.4) internal successors, (802), 5 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:31,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:31,641 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:31,641 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 578 flow. Second operand 5 states and 802 transitions. [2023-11-06 22:43:31,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 222 transitions, 1863 flow [2023-11-06 22:43:32,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 222 transitions, 1814 flow, removed 20 selfloop flow, removed 1 redundant places. [2023-11-06 22:43:32,211 INFO L231 Difference]: Finished difference. Result has 96 places, 94 transitions, 596 flow [2023-11-06 22:43:32,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=596, PETRI_PLACES=96, PETRI_TRANSITIONS=94} [2023-11-06 22:43:32,212 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 46 predicate places. [2023-11-06 22:43:32,212 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 94 transitions, 596 flow [2023-11-06 22:43:32,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:32,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:32,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:32,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:43:32,213 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:43:32,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:32,213 INFO L85 PathProgramCache]: Analyzing trace with hash -142968974, now seen corresponding path program 2 times [2023-11-06 22:43:32,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:32,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396309484] [2023-11-06 22:43:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:32,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:43:32,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:32,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396309484] [2023-11-06 22:43:32,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396309484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:32,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:32,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:43:32,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847839193] [2023-11-06 22:43:32,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:32,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:43:32,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:32,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:43:32,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:43:32,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 298 [2023-11-06 22:43:32,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 94 transitions, 596 flow. Second operand has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:32,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:32,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 298 [2023-11-06 22:43:32,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:34,640 INFO L124 PetriNetUnfolderBase]: 14584/17497 cut-off events. [2023-11-06 22:43:34,640 INFO L125 PetriNetUnfolderBase]: For 99267/99267 co-relation queries the response was YES. [2023-11-06 22:43:34,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86104 conditions, 17497 events. 14584/17497 cut-off events. For 99267/99267 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 57461 event pairs, 996 based on Foata normal form. 484/17981 useless extension candidates. Maximal degree in co-relation 76681. Up to 11829 conditions per place. [2023-11-06 22:43:34,801 INFO L140 encePairwiseOnDemand]: 293/298 looper letters, 184 selfloop transitions, 12 changer transitions 0/196 dead transitions. [2023-11-06 22:43:34,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 196 transitions, 1621 flow [2023-11-06 22:43:34,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:43:34,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:43:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 793 transitions. [2023-11-06 22:43:34,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5322147651006711 [2023-11-06 22:43:34,808 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 793 transitions. [2023-11-06 22:43:34,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 793 transitions. [2023-11-06 22:43:34,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:34,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 793 transitions. [2023-11-06 22:43:34,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.6) internal successors, (793), 5 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:34,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:34,818 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 298.0) internal successors, (1788), 6 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:34,819 INFO L175 Difference]: Start difference. First operand has 96 places, 94 transitions, 596 flow. Second operand 5 states and 793 transitions. [2023-11-06 22:43:34,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 196 transitions, 1621 flow [2023-11-06 22:43:35,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 196 transitions, 1608 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-06 22:43:35,365 INFO L231 Difference]: Finished difference. Result has 100 places, 97 transitions, 651 flow [2023-11-06 22:43:35,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=651, PETRI_PLACES=100, PETRI_TRANSITIONS=97} [2023-11-06 22:43:35,366 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 50 predicate places. [2023-11-06 22:43:35,367 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 97 transitions, 651 flow [2023-11-06 22:43:35,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:35,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:35,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:43:35,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:43:35,368 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 22:43:35,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:35,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1020007562, now seen corresponding path program 1 times [2023-11-06 22:43:35,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:43:35,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546650899] [2023-11-06 22:43:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:35,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:43:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:43:36,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:43:36,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546650899] [2023-11-06 22:43:36,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546650899] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:43:36,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470300251] [2023-11-06 22:43:36,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:36,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:43:36,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:43:36,760 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:43:36,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e3223d6-1443-43fa-a14a-f1f32c66841d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:43:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:52,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:43:52,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:12,344 WARN L293 SmtUtils]: Spent 10.93s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:45:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:41,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:46:34,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470300251] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:34,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:34,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 7] total 22 [2023-11-06 22:46:34,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206121896] [2023-11-06 22:46:34,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:34,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:46:34,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:34,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:46:34,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=406, Unknown=36, NotChecked=0, Total=552 [2023-11-06 22:46:37,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:46:39,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:46:41,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:46:43,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:46:45,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:46:47,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:46:49,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:46:51,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:46:53,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:46:55,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:46:57,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:47:00,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []