./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-comm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/mult-comm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --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 de93f11842753a9f5cde98724d1851736862f745073786263bfd177abe6c2376 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:47:06,078 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:47:06,205 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:47:06,210 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:47:06,210 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:47:06,233 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:47:06,234 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:47:06,235 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:47:06,236 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:47:06,236 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:47:06,241 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:47:06,242 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:47:06,242 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:47:06,243 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:47:06,244 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:47:06,245 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:47:06,245 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:47:06,246 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:47:06,247 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:47:06,247 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:47:06,248 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:47:06,254 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:47:06,254 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:47:06,255 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:47:06,255 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:47:06,268 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:47:06,268 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:47:06,269 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:47:06,269 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:47:06,271 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:47:06,271 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:47:06,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:47:06,272 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:47:06,274 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:47:06,274 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:47:06,275 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:47:06,275 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:47:06,275 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:47:06,276 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:47:06,276 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:47:06,276 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:47:06,277 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:47:06,277 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_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de93f11842753a9f5cde98724d1851736862f745073786263bfd177abe6c2376 [2023-11-26 11:47:06,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:47:06,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:47:06,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:47:06,584 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:47:06,584 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:47:06,586 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/mult-comm.wvr.c [2023-11-26 11:47:09,800 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:47:09,996 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:47:09,997 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/sv-benchmarks/c/weaver/mult-comm.wvr.c [2023-11-26 11:47:10,006 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/data/5224b743f/8e58aed9936d41779f641ee472b44124/FLAG37950d5b2 [2023-11-26 11:47:10,022 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/data/5224b743f/8e58aed9936d41779f641ee472b44124 [2023-11-26 11:47:10,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:47:10,027 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:47:10,028 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:47:10,029 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:47:10,035 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:47:10,036 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:47:10" (1/1) ... [2023-11-26 11:47:10,037 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a965aa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:10, skipping insertion in model container [2023-11-26 11:47:10,037 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:47:10" (1/1) ... [2023-11-26 11:47:10,065 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:47:10,310 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_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/sv-benchmarks/c/weaver/mult-comm.wvr.c[1936,1949] [2023-11-26 11:47:10,316 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:47:10,329 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:47:10,366 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_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/sv-benchmarks/c/weaver/mult-comm.wvr.c[1936,1949] [2023-11-26 11:47:10,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:47:10,395 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:47:10,396 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:10 WrapperNode [2023-11-26 11:47:10,396 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:47:10,398 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:47:10,398 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:47:10,399 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:47:10,405 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:10" (1/1) ... [2023-11-26 11:47:10,413 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:10" (1/1) ... [2023-11-26 11:47:10,434 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2023-11-26 11:47:10,434 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:47:10,435 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:47:10,435 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:47:10,435 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:47:10,448 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:10" (1/1) ... [2023-11-26 11:47:10,448 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:10" (1/1) ... [2023-11-26 11:47:10,450 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:10" (1/1) ... [2023-11-26 11:47:10,478 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-26 11:47:10,478 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:10" (1/1) ... [2023-11-26 11:47:10,479 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:10" (1/1) ... [2023-11-26 11:47:10,485 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:10" (1/1) ... [2023-11-26 11:47:10,488 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:10" (1/1) ... [2023-11-26 11:47:10,490 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:10" (1/1) ... [2023-11-26 11:47:10,491 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:10" (1/1) ... [2023-11-26 11:47:10,495 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:47:10,496 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:47:10,496 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:47:10,496 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:47:10,497 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:10" (1/1) ... [2023-11-26 11:47:10,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:47:10,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:10,536 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:47:10,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:47:10,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:47:10,580 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:47:10,580 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:47:10,580 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:47:10,580 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:47:10,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:47:10,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:47:10,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:47:10,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:47:10,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:47:10,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:47:10,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:47:10,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:47:10,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:47:10,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:47:10,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:47:10,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:47:10,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:47:10,585 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:47:10,690 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:47:10,692 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:47:10,966 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:47:11,129 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:47:11,130 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:47:11,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:47:11 BoogieIcfgContainer [2023-11-26 11:47:11,130 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:47:11,133 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:47:11,133 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:47:11,148 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:47:11,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:47:10" (1/3) ... [2023-11-26 11:47:11,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d96abf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:47:11, skipping insertion in model container [2023-11-26 11:47:11,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:10" (2/3) ... [2023-11-26 11:47:11,150 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d96abf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:47:11, skipping insertion in model container [2023-11-26 11:47:11,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:47:11" (3/3) ... [2023-11-26 11:47:11,151 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2023-11-26 11:47:11,168 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:47:11,181 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:47:11,181 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:47:11,181 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:47:11,277 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:47:11,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 19 transitions, 52 flow [2023-11-26 11:47:11,345 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2023-11-26 11:47:11,345 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:47:11,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 17 events. 2/17 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2023-11-26 11:47:11,355 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 19 transitions, 52 flow [2023-11-26 11:47:11,359 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 16 transitions, 44 flow [2023-11-26 11:47:11,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:47:11,389 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=LoopHeads, 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;@60babc73, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:47:11,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-26 11:47:11,402 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:47:11,412 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-11-26 11:47:11,413 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:47:11,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:11,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:11,414 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:11,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:11,421 INFO L85 PathProgramCache]: Analyzing trace with hash -416623653, now seen corresponding path program 1 times [2023-11-26 11:47:11,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:11,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028786365] [2023-11-26 11:47:11,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:11,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:12,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:12,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028786365] [2023-11-26 11:47:12,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028786365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:12,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:12,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:47:12,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808812911] [2023-11-26 11:47:12,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:12,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:12,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:12,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:12,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:12,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-26 11:47:12,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:12,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:12,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-26 11:47:12,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:12,340 INFO L124 PetriNetUnfolderBase]: 74/135 cut-off events. [2023-11-26 11:47:12,340 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-26 11:47:12,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 135 events. 74/135 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 358 event pairs, 24 based on Foata normal form. 1/104 useless extension candidates. Maximal degree in co-relation 220. Up to 79 conditions per place. [2023-11-26 11:47:12,347 INFO L140 encePairwiseOnDemand]: 15/19 looper letters, 23 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2023-11-26 11:47:12,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 131 flow [2023-11-26 11:47:12,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:12,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:47:12,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2023-11-26 11:47:12,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6491228070175439 [2023-11-26 11:47:12,364 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 37 transitions. [2023-11-26 11:47:12,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 37 transitions. [2023-11-26 11:47:12,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:12,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 37 transitions. [2023-11-26 11:47:12,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:12,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:12,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:12,381 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 44 flow. Second operand 3 states and 37 transitions. [2023-11-26 11:47:12,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 131 flow [2023-11-26 11:47:12,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 117 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:47:12,390 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 55 flow [2023-11-26 11:47:12,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-11-26 11:47:12,398 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-26 11:47:12,399 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 55 flow [2023-11-26 11:47:12,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:12,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:12,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:12,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:47:12,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:12,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:12,403 INFO L85 PathProgramCache]: Analyzing trace with hash 287926024, now seen corresponding path program 1 times [2023-11-26 11:47:12,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:12,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660855180] [2023-11-26 11:47:12,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:12,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:12,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:12,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660855180] [2023-11-26 11:47:12,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660855180] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:12,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156800908] [2023-11-26 11:47:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:12,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:12,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:12,993 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:13,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:47:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:13,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:47:13,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:13,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:13,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156800908] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:13,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:13,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2023-11-26 11:47:13,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625377356] [2023-11-26 11:47:13,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:13,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:47:13,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:13,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:47:13,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:47:13,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-26 11:47:13,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 55 flow. Second operand has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:13,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:13,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-26 11:47:13,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:14,151 INFO L124 PetriNetUnfolderBase]: 76/144 cut-off events. [2023-11-26 11:47:14,151 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-26 11:47:14,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 144 events. 76/144 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 418 event pairs, 3 based on Foata normal form. 1/145 useless extension candidates. Maximal degree in co-relation 114. Up to 77 conditions per place. [2023-11-26 11:47:14,154 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 26 selfloop transitions, 11 changer transitions 17/55 dead transitions. [2023-11-26 11:47:14,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 55 transitions, 256 flow [2023-11-26 11:47:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:47:14,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:47:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 85 transitions. [2023-11-26 11:47:14,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2023-11-26 11:47:14,157 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 85 transitions. [2023-11-26 11:47:14,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 85 transitions. [2023-11-26 11:47:14,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:14,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 85 transitions. [2023-11-26 11:47:14,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:14,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:14,161 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:14,161 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 55 flow. Second operand 10 states and 85 transitions. [2023-11-26 11:47:14,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 55 transitions, 256 flow [2023-11-26 11:47:14,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 55 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:47:14,164 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 115 flow [2023-11-26 11:47:14,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=115, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-26 11:47:14,165 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-11-26 11:47:14,165 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 115 flow [2023-11-26 11:47:14,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:14,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:14,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:14,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:14,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:14,374 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:14,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:14,375 INFO L85 PathProgramCache]: Analyzing trace with hash -876591693, now seen corresponding path program 1 times [2023-11-26 11:47:14,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:14,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567267383] [2023-11-26 11:47:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:14,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:14,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:14,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567267383] [2023-11-26 11:47:14,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567267383] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:14,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318065324] [2023-11-26 11:47:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:14,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:14,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:14,602 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:14,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:47:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:14,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:47:14,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:14,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:15,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318065324] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:15,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:15,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-11-26 11:47:15,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757284843] [2023-11-26 11:47:15,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:15,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:47:15,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:15,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:47:15,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:47:15,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-26 11:47:15,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 115 flow. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:15,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:15,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-26 11:47:15,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:15,268 INFO L124 PetriNetUnfolderBase]: 69/130 cut-off events. [2023-11-26 11:47:15,268 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-26 11:47:15,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 130 events. 69/130 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 333 event pairs, 11 based on Foata normal form. 1/131 useless extension candidates. Maximal degree in co-relation 388. Up to 73 conditions per place. [2023-11-26 11:47:15,271 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 22 selfloop transitions, 7 changer transitions 15/45 dead transitions. [2023-11-26 11:47:15,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 45 transitions, 261 flow [2023-11-26 11:47:15,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:47:15,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:47:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2023-11-26 11:47:15,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2023-11-26 11:47:15,274 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 60 transitions. [2023-11-26 11:47:15,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 60 transitions. [2023-11-26 11:47:15,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:15,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 60 transitions. [2023-11-26 11:47:15,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:15,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:15,277 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:15,277 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 115 flow. Second operand 6 states and 60 transitions. [2023-11-26 11:47:15,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 45 transitions, 261 flow [2023-11-26 11:47:15,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 45 transitions, 241 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-26 11:47:15,282 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 104 flow [2023-11-26 11:47:15,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=104, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-11-26 11:47:15,283 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-11-26 11:47:15,284 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 104 flow [2023-11-26 11:47:15,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:15,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:15,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:15,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-26 11:47:15,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:15,491 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:15,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1170675074, now seen corresponding path program 2 times [2023-11-26 11:47:15,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:15,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33016361] [2023-11-26 11:47:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:15,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:15,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:15,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33016361] [2023-11-26 11:47:15,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33016361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:15,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054431968] [2023-11-26 11:47:15,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:47:15,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:15,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:15,804 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:15,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:47:15,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:47:15,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:15,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:47:15,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:16,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:16,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054431968] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:16,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:16,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 10 [2023-11-26 11:47:16,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853516588] [2023-11-26 11:47:16,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:16,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:47:16,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:16,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:47:16,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:47:16,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-26 11:47:16,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 104 flow. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:16,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:16,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-26 11:47:16,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:16,515 INFO L124 PetriNetUnfolderBase]: 113/213 cut-off events. [2023-11-26 11:47:16,515 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-11-26 11:47:16,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 213 events. 113/213 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 668 event pairs, 13 based on Foata normal form. 3/214 useless extension candidates. Maximal degree in co-relation 617. Up to 92 conditions per place. [2023-11-26 11:47:16,519 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 40 selfloop transitions, 18 changer transitions 12/71 dead transitions. [2023-11-26 11:47:16,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 71 transitions, 396 flow [2023-11-26 11:47:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:47:16,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:47:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2023-11-26 11:47:16,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210526315789473 [2023-11-26 11:47:16,528 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 99 transitions. [2023-11-26 11:47:16,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 99 transitions. [2023-11-26 11:47:16,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:16,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 99 transitions. [2023-11-26 11:47:16,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:16,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:16,535 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:16,535 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 104 flow. Second operand 10 states and 99 transitions. [2023-11-26 11:47:16,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 71 transitions, 396 flow [2023-11-26 11:47:16,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 71 transitions, 378 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-26 11:47:16,543 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 205 flow [2023-11-26 11:47:16,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=205, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-11-26 11:47:16,545 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2023-11-26 11:47:16,545 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 205 flow [2023-11-26 11:47:16,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:16,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:16,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:16,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:16,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:16,755 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:16,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:16,756 INFO L85 PathProgramCache]: Analyzing trace with hash 725962322, now seen corresponding path program 3 times [2023-11-26 11:47:16,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:16,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995165120] [2023-11-26 11:47:16,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:16,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:17,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:17,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995165120] [2023-11-26 11:47:17,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995165120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:17,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525440137] [2023-11-26 11:47:17,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:47:17,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:17,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:17,114 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:17,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:47:17,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 11:47:17,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:17,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:47:17,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:17,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:17,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525440137] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:17,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:17,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2023-11-26 11:47:17,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093634943] [2023-11-26 11:47:17,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:17,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:47:17,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:17,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:47:17,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:47:17,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-26 11:47:17,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 205 flow. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:17,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:17,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-26 11:47:17,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:17,798 INFO L124 PetriNetUnfolderBase]: 129/240 cut-off events. [2023-11-26 11:47:17,799 INFO L125 PetriNetUnfolderBase]: For 410/410 co-relation queries the response was YES. [2023-11-26 11:47:17,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 240 events. 129/240 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 799 event pairs, 23 based on Foata normal form. 2/240 useless extension candidates. Maximal degree in co-relation 819. Up to 178 conditions per place. [2023-11-26 11:47:17,804 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 41 selfloop transitions, 15 changer transitions 8/65 dead transitions. [2023-11-26 11:47:17,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 65 transitions, 442 flow [2023-11-26 11:47:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:47:17,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 11:47:17,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 77 transitions. [2023-11-26 11:47:17,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506578947368421 [2023-11-26 11:47:17,808 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 77 transitions. [2023-11-26 11:47:17,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 77 transitions. [2023-11-26 11:47:17,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:17,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 77 transitions. [2023-11-26 11:47:17,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:17,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:17,813 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:17,814 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 205 flow. Second operand 8 states and 77 transitions. [2023-11-26 11:47:17,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 65 transitions, 442 flow [2023-11-26 11:47:17,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 387 flow, removed 22 selfloop flow, removed 3 redundant places. [2023-11-26 11:47:17,826 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 250 flow [2023-11-26 11:47:17,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-11-26 11:47:17,829 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-11-26 11:47:17,830 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 250 flow [2023-11-26 11:47:17,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:17,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:17,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:17,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:18,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:18,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:18,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:18,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1659426031, now seen corresponding path program 2 times [2023-11-26 11:47:18,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:18,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20302169] [2023-11-26 11:47:18,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:18,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:18,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:18,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20302169] [2023-11-26 11:47:18,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20302169] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:18,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109060296] [2023-11-26 11:47:18,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:47:18,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:18,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:18,349 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:18,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:47:18,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:47:18,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:18,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:47:18,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:18,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:18,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:18,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109060296] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:18,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:18,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2023-11-26 11:47:18,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805701076] [2023-11-26 11:47:18,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:18,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:47:18,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:18,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:47:18,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:47:18,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-26 11:47:18,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 250 flow. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:18,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:18,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-26 11:47:18,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:19,082 INFO L124 PetriNetUnfolderBase]: 161/298 cut-off events. [2023-11-26 11:47:19,082 INFO L125 PetriNetUnfolderBase]: For 696/696 co-relation queries the response was YES. [2023-11-26 11:47:19,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1085 conditions, 298 events. 161/298 cut-off events. For 696/696 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1075 event pairs, 31 based on Foata normal form. 2/298 useless extension candidates. Maximal degree in co-relation 1031. Up to 236 conditions per place. [2023-11-26 11:47:19,089 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 51 selfloop transitions, 15 changer transitions 4/71 dead transitions. [2023-11-26 11:47:19,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 71 transitions, 520 flow [2023-11-26 11:47:19,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:47:19,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 11:47:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 75 transitions. [2023-11-26 11:47:19,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4934210526315789 [2023-11-26 11:47:19,094 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 75 transitions. [2023-11-26 11:47:19,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 75 transitions. [2023-11-26 11:47:19,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:19,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 75 transitions. [2023-11-26 11:47:19,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:19,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:19,098 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:19,098 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 250 flow. Second operand 8 states and 75 transitions. [2023-11-26 11:47:19,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 71 transitions, 520 flow [2023-11-26 11:47:19,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 71 transitions, 458 flow, removed 23 selfloop flow, removed 4 redundant places. [2023-11-26 11:47:19,108 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 292 flow [2023-11-26 11:47:19,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=292, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2023-11-26 11:47:19,112 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-11-26 11:47:19,112 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 292 flow [2023-11-26 11:47:19,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:19,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:19,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:19,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:19,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:47:19,322 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:19,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:19,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1726562699, now seen corresponding path program 3 times [2023-11-26 11:47:19,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:19,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821099353] [2023-11-26 11:47:19,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:19,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:19,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:19,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821099353] [2023-11-26 11:47:19,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821099353] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:19,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798000777] [2023-11-26 11:47:19,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:47:19,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:19,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:19,617 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:19,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:47:19,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 11:47:19,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:19,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 11:47:19,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:19,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:20,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798000777] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:20,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:20,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 14 [2023-11-26 11:47:20,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542850465] [2023-11-26 11:47:20,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:20,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:47:20,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:20,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:47:20,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:47:20,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-26 11:47:20,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 292 flow. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:20,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:20,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-26 11:47:20,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:20,588 INFO L124 PetriNetUnfolderBase]: 275/510 cut-off events. [2023-11-26 11:47:20,588 INFO L125 PetriNetUnfolderBase]: For 843/843 co-relation queries the response was YES. [2023-11-26 11:47:20,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1834 conditions, 510 events. 275/510 cut-off events. For 843/843 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2233 event pairs, 43 based on Foata normal form. 2/510 useless extension candidates. Maximal degree in co-relation 1747. Up to 215 conditions per place. [2023-11-26 11:47:20,594 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 68 selfloop transitions, 44 changer transitions 13/126 dead transitions. [2023-11-26 11:47:20,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 126 transitions, 920 flow [2023-11-26 11:47:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:47:20,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-26 11:47:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 134 transitions. [2023-11-26 11:47:20,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037593984962406 [2023-11-26 11:47:20,597 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 134 transitions. [2023-11-26 11:47:20,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 134 transitions. [2023-11-26 11:47:20,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:20,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 134 transitions. [2023-11-26 11:47:20,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 9.571428571428571) internal successors, (134), 14 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:20,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 19.0) internal successors, (285), 15 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:20,600 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 19.0) internal successors, (285), 15 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:20,600 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 292 flow. Second operand 14 states and 134 transitions. [2023-11-26 11:47:20,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 126 transitions, 920 flow [2023-11-26 11:47:20,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 126 transitions, 877 flow, removed 17 selfloop flow, removed 2 redundant places. [2023-11-26 11:47:20,610 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 628 flow [2023-11-26 11:47:20,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=628, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2023-11-26 11:47:20,611 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2023-11-26 11:47:20,611 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 628 flow [2023-11-26 11:47:20,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:20,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:20,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:20,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:20,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:47:20,819 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:20,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:20,820 INFO L85 PathProgramCache]: Analyzing trace with hash 885699366, now seen corresponding path program 1 times [2023-11-26 11:47:20,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:20,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255973990] [2023-11-26 11:47:20,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:20,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:21,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:21,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255973990] [2023-11-26 11:47:21,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255973990] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:21,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596020948] [2023-11-26 11:47:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:21,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:21,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:21,470 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:21,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:47:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:21,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 11:47:21,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:21,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:22,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596020948] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:22,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:22,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-26 11:47:22,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33948850] [2023-11-26 11:47:22,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:22,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:47:22,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:22,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:47:22,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:47:22,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-26 11:47:22,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 628 flow. Second operand has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:22,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:22,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-26 11:47:22,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:25,178 INFO L124 PetriNetUnfolderBase]: 391/741 cut-off events. [2023-11-26 11:47:25,178 INFO L125 PetriNetUnfolderBase]: For 3129/3129 co-relation queries the response was YES. [2023-11-26 11:47:25,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3363 conditions, 741 events. 391/741 cut-off events. For 3129/3129 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3713 event pairs, 37 based on Foata normal form. 3/744 useless extension candidates. Maximal degree in co-relation 3222. Up to 354 conditions per place. [2023-11-26 11:47:25,187 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 103 selfloop transitions, 63 changer transitions 35/202 dead transitions. [2023-11-26 11:47:25,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 202 transitions, 1720 flow [2023-11-26 11:47:25,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 11:47:25,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-26 11:47:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 214 transitions. [2023-11-26 11:47:25,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4692982456140351 [2023-11-26 11:47:25,190 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 214 transitions. [2023-11-26 11:47:25,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 214 transitions. [2023-11-26 11:47:25,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:25,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 214 transitions. [2023-11-26 11:47:25,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 8.916666666666666) internal successors, (214), 24 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:25,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 19.0) internal successors, (475), 25 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:25,194 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 19.0) internal successors, (475), 25 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:25,194 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 628 flow. Second operand 24 states and 214 transitions. [2023-11-26 11:47:25,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 202 transitions, 1720 flow [2023-11-26 11:47:25,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 202 transitions, 1587 flow, removed 59 selfloop flow, removed 4 redundant places. [2023-11-26 11:47:25,220 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 1023 flow [2023-11-26 11:47:25,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1023, PETRI_PLACES=102, PETRI_TRANSITIONS=113} [2023-11-26 11:47:25,221 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 81 predicate places. [2023-11-26 11:47:25,222 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 1023 flow [2023-11-26 11:47:25,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:25,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:25,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:25,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:25,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:25,430 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:25,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:25,430 INFO L85 PathProgramCache]: Analyzing trace with hash -919466126, now seen corresponding path program 2 times [2023-11-26 11:47:25,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:25,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742130049] [2023-11-26 11:47:25,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:25,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:26,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:26,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742130049] [2023-11-26 11:47:26,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742130049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:26,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313426854] [2023-11-26 11:47:26,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:47:26,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:26,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:26,160 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:26,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:47:26,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:47:26,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:26,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 11:47:26,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:26,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:27,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313426854] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:27,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:27,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-26 11:47:27,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702688759] [2023-11-26 11:47:27,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:27,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 11:47:27,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:27,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 11:47:27,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:47:27,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-26 11:47:27,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 1023 flow. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:27,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:27,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-26 11:47:27,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:30,178 INFO L124 PetriNetUnfolderBase]: 425/867 cut-off events. [2023-11-26 11:47:30,179 INFO L125 PetriNetUnfolderBase]: For 7430/7430 co-relation queries the response was YES. [2023-11-26 11:47:30,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4680 conditions, 867 events. 425/867 cut-off events. For 7430/7430 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4873 event pairs, 35 based on Foata normal form. 4/867 useless extension candidates. Maximal degree in co-relation 4476. Up to 367 conditions per place. [2023-11-26 11:47:30,192 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 117 selfloop transitions, 93 changer transitions 22/233 dead transitions. [2023-11-26 11:47:30,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 233 transitions, 2391 flow [2023-11-26 11:47:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-26 11:47:30,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-26 11:47:30,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 256 transitions. [2023-11-26 11:47:30,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44912280701754387 [2023-11-26 11:47:30,195 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 256 transitions. [2023-11-26 11:47:30,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 256 transitions. [2023-11-26 11:47:30,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:30,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 256 transitions. [2023-11-26 11:47:30,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 8.533333333333333) internal successors, (256), 30 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:30,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 19.0) internal successors, (589), 31 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:30,200 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 19.0) internal successors, (589), 31 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:30,200 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 1023 flow. Second operand 30 states and 256 transitions. [2023-11-26 11:47:30,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 233 transitions, 2391 flow [2023-11-26 11:47:30,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 233 transitions, 2139 flow, removed 105 selfloop flow, removed 11 redundant places. [2023-11-26 11:47:30,242 INFO L231 Difference]: Finished difference. Result has 132 places, 144 transitions, 1580 flow [2023-11-26 11:47:30,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1580, PETRI_PLACES=132, PETRI_TRANSITIONS=144} [2023-11-26 11:47:30,244 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 111 predicate places. [2023-11-26 11:47:30,244 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 144 transitions, 1580 flow [2023-11-26 11:47:30,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:30,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:30,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:30,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:30,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:30,451 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:30,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:30,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1657157464, now seen corresponding path program 3 times [2023-11-26 11:47:30,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:30,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228721326] [2023-11-26 11:47:30,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:30,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:31,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:31,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228721326] [2023-11-26 11:47:31,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228721326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:31,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010188387] [2023-11-26 11:47:31,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:47:31,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:31,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:31,190 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:31,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:47:31,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 11:47:31,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:31,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 11:47:31,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:31,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:32,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010188387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:32,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:32,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-26 11:47:32,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461732096] [2023-11-26 11:47:32,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:32,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 11:47:32,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:32,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 11:47:32,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:47:32,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-26 11:47:32,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 144 transitions, 1580 flow. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:32,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:32,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-26 11:47:32,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:34,925 INFO L124 PetriNetUnfolderBase]: 406/805 cut-off events. [2023-11-26 11:47:34,926 INFO L125 PetriNetUnfolderBase]: For 9959/9959 co-relation queries the response was YES. [2023-11-26 11:47:34,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4802 conditions, 805 events. 406/805 cut-off events. For 9959/9959 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4320 event pairs, 39 based on Foata normal form. 4/807 useless extension candidates. Maximal degree in co-relation 4650. Up to 367 conditions per place. [2023-11-26 11:47:34,939 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 103 selfloop transitions, 92 changer transitions 17/213 dead transitions. [2023-11-26 11:47:34,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 213 transitions, 2346 flow [2023-11-26 11:47:34,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-26 11:47:34,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-26 11:47:34,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 214 transitions. [2023-11-26 11:47:34,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45052631578947366 [2023-11-26 11:47:34,943 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 214 transitions. [2023-11-26 11:47:34,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 214 transitions. [2023-11-26 11:47:34,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:34,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 214 transitions. [2023-11-26 11:47:34,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 8.56) internal successors, (214), 25 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:34,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 19.0) internal successors, (494), 26 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:34,951 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 19.0) internal successors, (494), 26 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:34,951 INFO L175 Difference]: Start difference. First operand has 132 places, 144 transitions, 1580 flow. Second operand 25 states and 214 transitions. [2023-11-26 11:47:34,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 213 transitions, 2346 flow [2023-11-26 11:47:35,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 213 transitions, 1992 flow, removed 151 selfloop flow, removed 14 redundant places. [2023-11-26 11:47:35,013 INFO L231 Difference]: Finished difference. Result has 142 places, 147 transitions, 1566 flow [2023-11-26 11:47:35,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1566, PETRI_PLACES=142, PETRI_TRANSITIONS=147} [2023-11-26 11:47:35,014 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 121 predicate places. [2023-11-26 11:47:35,014 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 147 transitions, 1566 flow [2023-11-26 11:47:35,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:35,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:35,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:35,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:35,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:47:35,215 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:35,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:35,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1130127026, now seen corresponding path program 4 times [2023-11-26 11:47:35,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:35,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830132101] [2023-11-26 11:47:35,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:35,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:35,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:35,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830132101] [2023-11-26 11:47:35,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830132101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:35,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165735339] [2023-11-26 11:47:35,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:47:35,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:35,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:35,771 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:35,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:47:35,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:47:35,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:35,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 11:47:35,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:36,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:37,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165735339] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:37,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:37,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-26 11:47:37,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710707816] [2023-11-26 11:47:37,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:37,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:47:37,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:37,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:47:37,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:47:37,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-26 11:47:37,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 147 transitions, 1566 flow. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:37,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:37,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-26 11:47:37,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:38,949 INFO L124 PetriNetUnfolderBase]: 464/897 cut-off events. [2023-11-26 11:47:38,950 INFO L125 PetriNetUnfolderBase]: For 12218/12218 co-relation queries the response was YES. [2023-11-26 11:47:38,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5456 conditions, 897 events. 464/897 cut-off events. For 12218/12218 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4814 event pairs, 84 based on Foata normal form. 3/898 useless extension candidates. Maximal degree in co-relation 5330. Up to 746 conditions per place. [2023-11-26 11:47:38,966 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 160 selfloop transitions, 37 changer transitions 17/215 dead transitions. [2023-11-26 11:47:38,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 215 transitions, 2578 flow [2023-11-26 11:47:38,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 11:47:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-26 11:47:38,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 140 transitions. [2023-11-26 11:47:38,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2023-11-26 11:47:38,968 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 140 transitions. [2023-11-26 11:47:38,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 140 transitions. [2023-11-26 11:47:38,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:38,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 140 transitions. [2023-11-26 11:47:38,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.75) internal successors, (140), 16 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:38,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 19.0) internal successors, (323), 17 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:38,970 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 19.0) internal successors, (323), 17 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:38,970 INFO L175 Difference]: Start difference. First operand has 142 places, 147 transitions, 1566 flow. Second operand 16 states and 140 transitions. [2023-11-26 11:47:38,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 215 transitions, 2578 flow [2023-11-26 11:47:39,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 215 transitions, 2161 flow, removed 128 selfloop flow, removed 26 redundant places. [2023-11-26 11:47:39,041 INFO L231 Difference]: Finished difference. Result has 136 places, 169 transitions, 1705 flow [2023-11-26 11:47:39,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1705, PETRI_PLACES=136, PETRI_TRANSITIONS=169} [2023-11-26 11:47:39,042 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 115 predicate places. [2023-11-26 11:47:39,042 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 169 transitions, 1705 flow [2023-11-26 11:47:39,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:39,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:39,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:39,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:39,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:47:39,248 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:39,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:39,249 INFO L85 PathProgramCache]: Analyzing trace with hash 584072084, now seen corresponding path program 5 times [2023-11-26 11:47:39,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:39,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479227797] [2023-11-26 11:47:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:39,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:39,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:39,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479227797] [2023-11-26 11:47:39,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479227797] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:39,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738200993] [2023-11-26 11:47:39,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:47:39,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:39,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:39,904 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:39,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:47:39,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-26 11:47:39,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:40,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 11:47:40,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:40,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:41,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738200993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:41,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:41,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-26 11:47:41,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043878371] [2023-11-26 11:47:41,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:41,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:47:41,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:41,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:47:41,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:47:41,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-26 11:47:41,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 169 transitions, 1705 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:41,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:41,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-26 11:47:41,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:43,031 INFO L124 PetriNetUnfolderBase]: 496/971 cut-off events. [2023-11-26 11:47:43,032 INFO L125 PetriNetUnfolderBase]: For 6299/6299 co-relation queries the response was YES. [2023-11-26 11:47:43,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5464 conditions, 971 events. 496/971 cut-off events. For 6299/6299 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5380 event pairs, 90 based on Foata normal form. 3/972 useless extension candidates. Maximal degree in co-relation 5328. Up to 759 conditions per place. [2023-11-26 11:47:43,085 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 155 selfloop transitions, 53 changer transitions 13/222 dead transitions. [2023-11-26 11:47:43,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 222 transitions, 2537 flow [2023-11-26 11:47:43,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 11:47:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-26 11:47:43,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 143 transitions. [2023-11-26 11:47:43,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41812865497076024 [2023-11-26 11:47:43,086 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 143 transitions. [2023-11-26 11:47:43,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 143 transitions. [2023-11-26 11:47:43,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:43,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 143 transitions. [2023-11-26 11:47:43,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 7.944444444444445) internal successors, (143), 18 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:43,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:43,089 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:43,090 INFO L175 Difference]: Start difference. First operand has 136 places, 169 transitions, 1705 flow. Second operand 18 states and 143 transitions. [2023-11-26 11:47:43,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 222 transitions, 2537 flow [2023-11-26 11:47:43,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 222 transitions, 2433 flow, removed 50 selfloop flow, removed 2 redundant places. [2023-11-26 11:47:43,137 INFO L231 Difference]: Finished difference. Result has 157 places, 182 transitions, 1999 flow [2023-11-26 11:47:43,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1615, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1999, PETRI_PLACES=157, PETRI_TRANSITIONS=182} [2023-11-26 11:47:43,138 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 136 predicate places. [2023-11-26 11:47:43,139 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 182 transitions, 1999 flow [2023-11-26 11:47:43,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:43,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:43,139 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:43,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:43,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:47:43,345 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:43,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:43,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1223132305, now seen corresponding path program 4 times [2023-11-26 11:47:43,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:43,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13380051] [2023-11-26 11:47:43,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:43,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:43,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:43,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13380051] [2023-11-26 11:47:43,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13380051] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:43,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189564041] [2023-11-26 11:47:43,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:47:43,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:43,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:43,576 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:43,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:47:43,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:47:43,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:43,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:47:43,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:43,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:44,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189564041] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:44,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:44,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2023-11-26 11:47:44,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534140218] [2023-11-26 11:47:44,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:44,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 11:47:44,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:44,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 11:47:44,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:47:44,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-26 11:47:44,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 182 transitions, 1999 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:44,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:44,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-26 11:47:44,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:45,052 INFO L124 PetriNetUnfolderBase]: 493/946 cut-off events. [2023-11-26 11:47:45,052 INFO L125 PetriNetUnfolderBase]: For 7406/7406 co-relation queries the response was YES. [2023-11-26 11:47:45,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5633 conditions, 946 events. 493/946 cut-off events. For 7406/7406 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5101 event pairs, 85 based on Foata normal form. 3/947 useless extension candidates. Maximal degree in co-relation 5534. Up to 828 conditions per place. [2023-11-26 11:47:45,068 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 163 selfloop transitions, 41 changer transitions 15/220 dead transitions. [2023-11-26 11:47:45,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 220 transitions, 2640 flow [2023-11-26 11:47:45,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 11:47:45,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-26 11:47:45,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 123 transitions. [2023-11-26 11:47:45,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40460526315789475 [2023-11-26 11:47:45,070 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 123 transitions. [2023-11-26 11:47:45,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 123 transitions. [2023-11-26 11:47:45,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:45,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 123 transitions. [2023-11-26 11:47:45,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 7.6875) internal successors, (123), 16 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:45,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 19.0) internal successors, (323), 17 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:45,074 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 19.0) internal successors, (323), 17 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:45,074 INFO L175 Difference]: Start difference. First operand has 157 places, 182 transitions, 1999 flow. Second operand 16 states and 123 transitions. [2023-11-26 11:47:45,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 220 transitions, 2640 flow [2023-11-26 11:47:45,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 220 transitions, 2501 flow, removed 49 selfloop flow, removed 11 redundant places. [2023-11-26 11:47:45,135 INFO L231 Difference]: Finished difference. Result has 167 places, 186 transitions, 2064 flow [2023-11-26 11:47:45,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2064, PETRI_PLACES=167, PETRI_TRANSITIONS=186} [2023-11-26 11:47:45,137 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 146 predicate places. [2023-11-26 11:47:45,137 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 186 transitions, 2064 flow [2023-11-26 11:47:45,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:45,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:45,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:45,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:45,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:47:45,349 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:45,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:45,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1944438898, now seen corresponding path program 6 times [2023-11-26 11:47:45,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:45,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050340272] [2023-11-26 11:47:45,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:45,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:45,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:45,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050340272] [2023-11-26 11:47:45,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050340272] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:45,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280768142] [2023-11-26 11:47:45,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:47:45,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:45,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:45,918 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:45,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:47:46,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-26 11:47:46,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:46,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 11:47:46,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:46,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:47,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280768142] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:47,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:47,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-26 11:47:47,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751308239] [2023-11-26 11:47:47,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:47,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:47:47,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:47,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:47:47,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:47:47,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-26 11:47:47,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 186 transitions, 2064 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:47,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:47,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-26 11:47:47,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:48,665 INFO L124 PetriNetUnfolderBase]: 519/985 cut-off events. [2023-11-26 11:47:48,666 INFO L125 PetriNetUnfolderBase]: For 7721/7721 co-relation queries the response was YES. [2023-11-26 11:47:48,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6090 conditions, 985 events. 519/985 cut-off events. For 7721/7721 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 5322 event pairs, 89 based on Foata normal form. 2/985 useless extension candidates. Maximal degree in co-relation 5984. Up to 880 conditions per place. [2023-11-26 11:47:48,684 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 187 selfloop transitions, 43 changer transitions 7/238 dead transitions. [2023-11-26 11:47:48,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 238 transitions, 2999 flow [2023-11-26 11:47:48,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 11:47:48,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-26 11:47:48,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 137 transitions. [2023-11-26 11:47:48,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40058479532163743 [2023-11-26 11:47:48,686 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 137 transitions. [2023-11-26 11:47:48,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 137 transitions. [2023-11-26 11:47:48,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:48,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 137 transitions. [2023-11-26 11:47:48,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 7.611111111111111) internal successors, (137), 18 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:48,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:48,689 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:48,689 INFO L175 Difference]: Start difference. First operand has 167 places, 186 transitions, 2064 flow. Second operand 18 states and 137 transitions. [2023-11-26 11:47:48,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 238 transitions, 2999 flow [2023-11-26 11:47:48,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 238 transitions, 2884 flow, removed 22 selfloop flow, removed 13 redundant places. [2023-11-26 11:47:48,761 INFO L231 Difference]: Finished difference. Result has 176 places, 207 transitions, 2442 flow [2023-11-26 11:47:48,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1957, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2442, PETRI_PLACES=176, PETRI_TRANSITIONS=207} [2023-11-26 11:47:48,763 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 155 predicate places. [2023-11-26 11:47:48,763 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 207 transitions, 2442 flow [2023-11-26 11:47:48,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:48,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:48,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:48,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:48,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 11:47:48,974 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:48,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:48,975 INFO L85 PathProgramCache]: Analyzing trace with hash 241555988, now seen corresponding path program 7 times [2023-11-26 11:47:48,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:48,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51881771] [2023-11-26 11:47:48,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:48,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:49,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:49,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51881771] [2023-11-26 11:47:49,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51881771] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:49,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959808561] [2023-11-26 11:47:49,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 11:47:49,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:49,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:49,622 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:49,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 11:47:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:49,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 11:47:49,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:49,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:51,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:51,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959808561] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:51,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:51,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-26 11:47:51,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201702108] [2023-11-26 11:47:51,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:51,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:47:51,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:51,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:47:51,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:47:51,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-26 11:47:51,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 207 transitions, 2442 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:51,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:51,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-26 11:47:51,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:52,726 INFO L124 PetriNetUnfolderBase]: 564/1075 cut-off events. [2023-11-26 11:47:52,726 INFO L125 PetriNetUnfolderBase]: For 10370/10370 co-relation queries the response was YES. [2023-11-26 11:47:52,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6931 conditions, 1075 events. 564/1075 cut-off events. For 10370/10370 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 5943 event pairs, 85 based on Foata normal form. 3/1076 useless extension candidates. Maximal degree in co-relation 6812. Up to 888 conditions per place. [2023-11-26 11:47:52,742 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 189 selfloop transitions, 60 changer transitions 10/260 dead transitions. [2023-11-26 11:47:52,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 260 transitions, 3390 flow [2023-11-26 11:47:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 11:47:52,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-26 11:47:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 159 transitions. [2023-11-26 11:47:52,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39849624060150374 [2023-11-26 11:47:52,745 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 159 transitions. [2023-11-26 11:47:52,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 159 transitions. [2023-11-26 11:47:52,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:52,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 159 transitions. [2023-11-26 11:47:52,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.571428571428571) internal successors, (159), 21 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:52,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:52,747 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:52,748 INFO L175 Difference]: Start difference. First operand has 176 places, 207 transitions, 2442 flow. Second operand 21 states and 159 transitions. [2023-11-26 11:47:52,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 260 transitions, 3390 flow [2023-11-26 11:47:52,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 260 transitions, 3247 flow, removed 63 selfloop flow, removed 6 redundant places. [2023-11-26 11:47:52,818 INFO L231 Difference]: Finished difference. Result has 195 places, 220 transitions, 2732 flow [2023-11-26 11:47:52,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2317, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2732, PETRI_PLACES=195, PETRI_TRANSITIONS=220} [2023-11-26 11:47:52,819 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 174 predicate places. [2023-11-26 11:47:52,819 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 220 transitions, 2732 flow [2023-11-26 11:47:52,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:52,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:52,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:52,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:53,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 11:47:53,026 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:47:53,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:53,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1476787718, now seen corresponding path program 8 times [2023-11-26 11:47:53,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:53,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129071462] [2023-11-26 11:47:53,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:53,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:53,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:53,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129071462] [2023-11-26 11:47:53,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129071462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:53,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923677074] [2023-11-26 11:47:53,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:47:53,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:53,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:53,572 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:53,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c2d33b-5208-4dc5-aa25-95f2bb94f051/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 11:47:53,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:47:53,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:53,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 11:47:53,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:53,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:55,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923677074] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:55,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:55,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-26 11:47:55,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402991168] [2023-11-26 11:47:55,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:55,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:47:55,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:55,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:47:55,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:47:55,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-26 11:47:55,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 220 transitions, 2732 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:55,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:55,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-26 11:47:55,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand