./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy1.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_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/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_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/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_fd57df20-264e-483f-b480-08f7f3778960/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 935a7b7fee114f90b65d69dd73b2635844dd9aedca06c4cbc37a4ce046611c9d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:51:30,594 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:51:30,720 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:51:30,729 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:51:30,729 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:51:30,774 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:51:30,775 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:51:30,775 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:51:30,776 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:51:30,781 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:51:30,782 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:51:30,783 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:51:30,783 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:51:30,785 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:51:30,785 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:51:30,786 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:51:30,786 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:51:30,787 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:51:30,787 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:51:30,787 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:51:30,788 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:51:30,788 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:51:30,789 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:51:30,789 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:51:30,789 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:51:30,790 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:51:30,790 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:51:30,791 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:51:30,812 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:51:30,813 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:51:30,813 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:51:30,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:51:30,814 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:51:30,814 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:51:30,814 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:51:30,815 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:51:30,815 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:51:30,816 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:51:30,816 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:51:30,816 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:51:30,817 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:51:30,819 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:51:30,820 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_fd57df20-264e-483f-b480-08f7f3778960/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 935a7b7fee114f90b65d69dd73b2635844dd9aedca06c4cbc37a4ce046611c9d [2023-11-26 11:51:31,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:51:31,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:51:31,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:51:31,157 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:51:31,158 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:51:31,159 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/test-easy1.wvr.c [2023-11-26 11:51:34,111 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:51:34,392 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:51:34,393 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/sv-benchmarks/c/weaver/test-easy1.wvr.c [2023-11-26 11:51:34,401 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/data/7514727a3/c378d1fc0ee14527a8cce4b5ff2e1b51/FLAG46910d8ca [2023-11-26 11:51:34,413 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/data/7514727a3/c378d1fc0ee14527a8cce4b5ff2e1b51 [2023-11-26 11:51:34,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:51:34,417 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:51:34,419 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:51:34,419 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:51:34,425 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:51:34,427 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:51:34" (1/1) ... [2023-11-26 11:51:34,428 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@677479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:34, skipping insertion in model container [2023-11-26 11:51:34,428 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:51:34" (1/1) ... [2023-11-26 11:51:34,453 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:51:34,652 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_fd57df20-264e-483f-b480-08f7f3778960/sv-benchmarks/c/weaver/test-easy1.wvr.c[1902,1915] [2023-11-26 11:51:34,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:51:34,666 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:51:34,686 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_fd57df20-264e-483f-b480-08f7f3778960/sv-benchmarks/c/weaver/test-easy1.wvr.c[1902,1915] [2023-11-26 11:51:34,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:51:34,703 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:51:34,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:34 WrapperNode [2023-11-26 11:51:34,704 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:51:34,705 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:51:34,705 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:51:34,705 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:51:34,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:34" (1/1) ... [2023-11-26 11:51:34,720 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:34" (1/1) ... [2023-11-26 11:51:34,739 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2023-11-26 11:51:34,740 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:51:34,741 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:51:34,741 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:51:34,741 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:51:34,767 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:34" (1/1) ... [2023-11-26 11:51:34,767 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:34" (1/1) ... [2023-11-26 11:51:34,769 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:34" (1/1) ... [2023-11-26 11:51:34,805 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 11:51:34,806 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:34" (1/1) ... [2023-11-26 11:51:34,806 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:34" (1/1) ... [2023-11-26 11:51:34,819 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:34" (1/1) ... [2023-11-26 11:51:34,823 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:34" (1/1) ... [2023-11-26 11:51:34,824 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:34" (1/1) ... [2023-11-26 11:51:34,825 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:34" (1/1) ... [2023-11-26 11:51:34,827 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:51:34,834 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:51:34,835 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:51:34,835 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:51:34,836 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:34" (1/1) ... [2023-11-26 11:51:34,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:51:34,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:34,890 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:51:34,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:51:34,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:51:34,936 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:51:34,936 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:51:34,937 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:51:34,937 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:51:34,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:51:34,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:51:34,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:51:34,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:51:34,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:51:34,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:51:34,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:51:34,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:51:34,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:51:34,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:51:34,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:51:34,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:51:34,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:51:34,941 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 11:51:35,048 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:51:35,050 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:51:35,254 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:51:35,420 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:51:35,420 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:51:35,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:51:35 BoogieIcfgContainer [2023-11-26 11:51:35,421 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:51:35,424 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:51:35,424 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:51:35,427 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:51:35,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:51:34" (1/3) ... [2023-11-26 11:51:35,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2976dba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:51:35, skipping insertion in model container [2023-11-26 11:51:35,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:34" (2/3) ... [2023-11-26 11:51:35,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2976dba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:51:35, skipping insertion in model container [2023-11-26 11:51:35,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:51:35" (3/3) ... [2023-11-26 11:51:35,431 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2023-11-26 11:51:35,439 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:51:35,449 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:51:35,450 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:51:35,450 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:51:35,489 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:51:35,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 19 transitions, 52 flow [2023-11-26 11:51:35,551 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2023-11-26 11:51:35,551 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:51:35,554 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 11:51:35,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 19 transitions, 52 flow [2023-11-26 11:51:35,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 16 transitions, 44 flow [2023-11-26 11:51:35,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:51:35,577 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;@4a4b091b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:51:35,577 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-26 11:51:35,589 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:51:35,589 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-11-26 11:51:35,589 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:51:35,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:35,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:35,591 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 11:51:35,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:35,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2017814367, now seen corresponding path program 1 times [2023-11-26 11:51:35,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:35,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160876148] [2023-11-26 11:51:35,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:35,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:35,969 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 11:51:35,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:35,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160876148] [2023-11-26 11:51:35,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160876148] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:35,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:35,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:51:35,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485315020] [2023-11-26 11:51:35,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:35,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:35,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:36,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:36,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:36,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:36,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states 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 11:51:36,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:36,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:36,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:36,167 INFO L124 PetriNetUnfolderBase]: 65/115 cut-off events. [2023-11-26 11:51:36,167 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-26 11:51:36,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 115 events. 65/115 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 310 event pairs, 9 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-11-26 11:51:36,176 INFO L140 encePairwiseOnDemand]: 15/19 looper letters, 19 selfloop transitions, 3 changer transitions 1/26 dead transitions. [2023-11-26 11:51:36,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 26 transitions, 119 flow [2023-11-26 11:51:36,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:51:36,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2023-11-26 11:51:36,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6842105263157895 [2023-11-26 11:51:36,191 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 39 transitions. [2023-11-26 11:51:36,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 39 transitions. [2023-11-26 11:51:36,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:36,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 39 transitions. [2023-11-26 11:51:36,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 11:51:36,204 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 11:51:36,205 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 11:51:36,207 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 44 flow. Second operand 3 states and 39 transitions. [2023-11-26 11:51:36,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 26 transitions, 119 flow [2023-11-26 11:51:36,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 105 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:51:36,215 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 55 flow [2023-11-26 11:51:36,217 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 11:51:36,223 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-26 11:51:36,223 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 55 flow [2023-11-26 11:51:36,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states 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 11:51:36,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:36,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:36,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:51:36,225 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 11:51:36,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:36,227 INFO L85 PathProgramCache]: Analyzing trace with hash -996748784, now seen corresponding path program 1 times [2023-11-26 11:51:36,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:36,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87662182] [2023-11-26 11:51:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:36,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:36,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:36,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87662182] [2023-11-26 11:51:36,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87662182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:36,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:36,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:51:36,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110861612] [2023-11-26 11:51:36,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:36,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:36,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:36,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:36,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:36,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:36,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 55 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 11:51:36,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:36,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:36,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:36,615 INFO L124 PetriNetUnfolderBase]: 70/133 cut-off events. [2023-11-26 11:51:36,615 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-11-26 11:51:36,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 133 events. 70/133 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 391 event pairs, 9 based on Foata normal form. 4/137 useless extension candidates. Maximal degree in co-relation 121. Up to 68 conditions per place. [2023-11-26 11:51:36,619 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 27 selfloop transitions, 7 changer transitions 0/37 dead transitions. [2023-11-26 11:51:36,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 37 transitions, 177 flow [2023-11-26 11:51:36,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:51:36,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:51:36,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2023-11-26 11:51:36,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2023-11-26 11:51:36,624 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 57 transitions. [2023-11-26 11:51:36,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 57 transitions. [2023-11-26 11:51:36,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:36,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 57 transitions. [2023-11-26 11:51:36,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 11:51:36,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:51:36,632 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:51:36,633 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 55 flow. Second operand 5 states and 57 transitions. [2023-11-26 11:51:36,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 37 transitions, 177 flow [2023-11-26 11:51:36,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 37 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:51:36,642 INFO L231 Difference]: Finished difference. Result has 26 places, 24 transitions, 108 flow [2023-11-26 11:51:36,643 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=26, PETRI_TRANSITIONS=24} [2023-11-26 11:51:36,644 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-26 11:51:36,644 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 24 transitions, 108 flow [2023-11-26 11:51:36,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 11:51:36,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:36,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:36,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:51:36,652 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 11:51:36,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:36,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1836770002, now seen corresponding path program 2 times [2023-11-26 11:51:36,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:36,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363425855] [2023-11-26 11:51:36,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:36,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:36,818 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 11:51:36,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:36,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363425855] [2023-11-26 11:51:36,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363425855] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:36,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304097791] [2023-11-26 11:51:36,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:51:36,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:36,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:36,824 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:36,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:51:36,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:51:36,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:36,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:51:36,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:37,063 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 11:51:37,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:37,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304097791] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:37,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:51:37,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2023-11-26 11:51:37,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685014613] [2023-11-26 11:51:37,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:37,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:37,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:37,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:37,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:51:37,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:37,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 11:51:37,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:37,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:37,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:37,230 INFO L124 PetriNetUnfolderBase]: 63/124 cut-off events. [2023-11-26 11:51:37,231 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2023-11-26 11:51:37,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 124 events. 63/124 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 363 event pairs, 9 based on Foata normal form. 6/130 useless extension candidates. Maximal degree in co-relation 264. Up to 53 conditions per place. [2023-11-26 11:51:37,234 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 25 selfloop transitions, 8 changer transitions 2/38 dead transitions. [2023-11-26 11:51:37,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 38 transitions, 228 flow [2023-11-26 11:51:37,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:51:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:51:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2023-11-26 11:51:37,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6710526315789473 [2023-11-26 11:51:37,237 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 51 transitions. [2023-11-26 11:51:37,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 51 transitions. [2023-11-26 11:51:37,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:37,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 51 transitions. [2023-11-26 11:51:37,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 11:51:37,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 11:51:37,241 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 11:51:37,241 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 108 flow. Second operand 4 states and 51 transitions. [2023-11-26 11:51:37,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 38 transitions, 228 flow [2023-11-26 11:51:37,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 38 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:51:37,249 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 129 flow [2023-11-26 11:51:37,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-11-26 11:51:37,252 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2023-11-26 11:51:37,253 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 129 flow [2023-11-26 11:51:37,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 11:51:37,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:37,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:37,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:51:37,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:37,461 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 11:51:37,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:37,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1484488009, now seen corresponding path program 1 times [2023-11-26 11:51:37,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:37,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860810241] [2023-11-26 11:51:37,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:37,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:37,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:37,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860810241] [2023-11-26 11:51:37,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860810241] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:37,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:37,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:51:37,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564779114] [2023-11-26 11:51:37,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:37,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:37,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:37,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:37,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:37,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:37,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 11:51:37,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:37,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:37,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:37,637 INFO L124 PetriNetUnfolderBase]: 61/132 cut-off events. [2023-11-26 11:51:37,637 INFO L125 PetriNetUnfolderBase]: For 302/302 co-relation queries the response was YES. [2023-11-26 11:51:37,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 132 events. 61/132 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 405 event pairs, 7 based on Foata normal form. 8/140 useless extension candidates. Maximal degree in co-relation 230. Up to 50 conditions per place. [2023-11-26 11:51:37,644 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 32 selfloop transitions, 7 changer transitions 3/45 dead transitions. [2023-11-26 11:51:37,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 45 transitions, 305 flow [2023-11-26 11:51:37,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:51:37,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:51:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2023-11-26 11:51:37,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421052631578947 [2023-11-26 11:51:37,647 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 61 transitions. [2023-11-26 11:51:37,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 61 transitions. [2023-11-26 11:51:37,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:37,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 61 transitions. [2023-11-26 11:51:37,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 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 11:51:37,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:51:37,650 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:51:37,650 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 129 flow. Second operand 5 states and 61 transitions. [2023-11-26 11:51:37,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 45 transitions, 305 flow [2023-11-26 11:51:37,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 45 transitions, 273 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-26 11:51:37,657 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 163 flow [2023-11-26 11:51:37,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=163, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-11-26 11:51:37,658 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-11-26 11:51:37,658 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 163 flow [2023-11-26 11:51:37,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 11:51:37,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:37,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:37,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:51:37,659 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 11:51:37,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:37,660 INFO L85 PathProgramCache]: Analyzing trace with hash -868420213, now seen corresponding path program 2 times [2023-11-26 11:51:37,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:37,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382861860] [2023-11-26 11:51:37,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:37,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:37,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:37,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382861860] [2023-11-26 11:51:37,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382861860] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:37,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:37,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:51:37,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519062424] [2023-11-26 11:51:37,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:37,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:37,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:37,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:37,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:37,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:37,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 11:51:37,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:37,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:37,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:37,782 INFO L124 PetriNetUnfolderBase]: 48/104 cut-off events. [2023-11-26 11:51:37,782 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2023-11-26 11:51:37,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 104 events. 48/104 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 250 event pairs, 8 based on Foata normal form. 4/108 useless extension candidates. Maximal degree in co-relation 317. Up to 87 conditions per place. [2023-11-26 11:51:37,784 INFO L140 encePairwiseOnDemand]: 15/19 looper letters, 23 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2023-11-26 11:51:37,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 229 flow [2023-11-26 11:51:37,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:51:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:51:37,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2023-11-26 11:51:37,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5657894736842105 [2023-11-26 11:51:37,785 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 43 transitions. [2023-11-26 11:51:37,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 43 transitions. [2023-11-26 11:51:37,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:37,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 43 transitions. [2023-11-26 11:51:37,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 11:51:37,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 11:51:37,787 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 11:51:37,787 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 163 flow. Second operand 4 states and 43 transitions. [2023-11-26 11:51:37,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 229 flow [2023-11-26 11:51:37,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 223 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-26 11:51:37,791 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 165 flow [2023-11-26 11:51:37,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-11-26 11:51:37,792 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-11-26 11:51:37,792 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 165 flow [2023-11-26 11:51:37,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 11:51:37,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:37,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:37,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:51:37,793 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 11:51:37,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:37,793 INFO L85 PathProgramCache]: Analyzing trace with hash -981055758, now seen corresponding path program 1 times [2023-11-26 11:51:37,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:37,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130803982] [2023-11-26 11:51:37,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:37,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:37,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:37,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130803982] [2023-11-26 11:51:37,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130803982] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:37,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672710735] [2023-11-26 11:51:37,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:37,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:37,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:37,925 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:37,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:51:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:38,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:51:38,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:38,157 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 11:51:38,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:38,201 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 11:51:38,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672710735] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:38,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:38,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 3] total 9 [2023-11-26 11:51:38,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571898154] [2023-11-26 11:51:38,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:38,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:51:38,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:38,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:51:38,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:51:38,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:38,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 165 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 11:51:38,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:38,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:38,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:38,375 INFO L124 PetriNetUnfolderBase]: 123/251 cut-off events. [2023-11-26 11:51:38,376 INFO L125 PetriNetUnfolderBase]: For 577/577 co-relation queries the response was YES. [2023-11-26 11:51:38,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 251 events. 123/251 cut-off events. For 577/577 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 912 event pairs, 8 based on Foata normal form. 14/265 useless extension candidates. Maximal degree in co-relation 516. Up to 95 conditions per place. [2023-11-26 11:51:38,379 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 46 selfloop transitions, 20 changer transitions 1/70 dead transitions. [2023-11-26 11:51:38,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 70 transitions, 545 flow [2023-11-26 11:51:38,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:51:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:51:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2023-11-26 11:51:38,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6691729323308271 [2023-11-26 11:51:38,381 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 89 transitions. [2023-11-26 11:51:38,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 89 transitions. [2023-11-26 11:51:38,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:38,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 89 transitions. [2023-11-26 11:51:38,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 11:51:38,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 11:51:38,383 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 11:51:38,383 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 165 flow. Second operand 7 states and 89 transitions. [2023-11-26 11:51:38,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 70 transitions, 545 flow [2023-11-26 11:51:38,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 70 transitions, 522 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-26 11:51:38,388 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 372 flow [2023-11-26 11:51:38,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=372, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-11-26 11:51:38,389 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-11-26 11:51:38,389 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 372 flow [2023-11-26 11:51:38,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 11:51:38,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:38,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:38,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:38,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:51:38,596 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 11:51:38,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:38,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1676370134, now seen corresponding path program 2 times [2023-11-26 11:51:38,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:38,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340832664] [2023-11-26 11:51:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:38,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:38,723 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 11:51:38,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:38,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340832664] [2023-11-26 11:51:38,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340832664] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:38,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687721068] [2023-11-26 11:51:38,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:51:38,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:38,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:38,726 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:38,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:51:38,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:51:38,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:38,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:51:38,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:38,901 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 11:51:38,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:38,927 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 11:51:38,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687721068] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:38,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:38,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-11-26 11:51:38,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375396809] [2023-11-26 11:51:38,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:38,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:51:38,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:38,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:51:38,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:51:38,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:38,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 372 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 11:51:38,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:38,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:38,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:39,086 INFO L124 PetriNetUnfolderBase]: 175/357 cut-off events. [2023-11-26 11:51:39,086 INFO L125 PetriNetUnfolderBase]: For 1560/1560 co-relation queries the response was YES. [2023-11-26 11:51:39,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1776 conditions, 357 events. 175/357 cut-off events. For 1560/1560 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1505 event pairs, 22 based on Foata normal form. 6/363 useless extension candidates. Maximal degree in co-relation 938. Up to 242 conditions per place. [2023-11-26 11:51:39,091 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 56 selfloop transitions, 17 changer transitions 1/77 dead transitions. [2023-11-26 11:51:39,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 754 flow [2023-11-26 11:51:39,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:51:39,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:51:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 75 transitions. [2023-11-26 11:51:39,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2023-11-26 11:51:39,093 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 75 transitions. [2023-11-26 11:51:39,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 75 transitions. [2023-11-26 11:51:39,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:39,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 75 transitions. [2023-11-26 11:51:39,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.5) internal successors, (75), 6 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 11:51:39,094 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 11:51:39,094 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 11:51:39,095 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 372 flow. Second operand 6 states and 75 transitions. [2023-11-26 11:51:39,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 754 flow [2023-11-26 11:51:39,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 709 flow, removed 21 selfloop flow, removed 1 redundant places. [2023-11-26 11:51:39,104 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 514 flow [2023-11-26 11:51:39,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=514, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2023-11-26 11:51:39,105 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2023-11-26 11:51:39,105 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 514 flow [2023-11-26 11:51:39,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 11:51:39,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:39,106 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:39,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:39,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:39,313 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 11:51:39,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:39,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1357969930, now seen corresponding path program 3 times [2023-11-26 11:51:39,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:39,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728847645] [2023-11-26 11:51:39,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:39,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:39,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:39,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728847645] [2023-11-26 11:51:39,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728847645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:39,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841105654] [2023-11-26 11:51:39,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:51:39,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:39,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:39,427 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:39,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:51:39,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 11:51:39,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:39,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:51:39,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:39,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:39,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841105654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:39,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:39,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-26 11:51:39,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035049201] [2023-11-26 11:51:39,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:39,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:51:39,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:39,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:51:39,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:51:39,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:39,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 514 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 11:51:39,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:39,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:39,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:39,862 INFO L124 PetriNetUnfolderBase]: 190/423 cut-off events. [2023-11-26 11:51:39,863 INFO L125 PetriNetUnfolderBase]: For 2527/2527 co-relation queries the response was YES. [2023-11-26 11:51:39,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2135 conditions, 423 events. 190/423 cut-off events. For 2527/2527 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2047 event pairs, 4 based on Foata normal form. 24/447 useless extension candidates. Maximal degree in co-relation 1340. Up to 174 conditions per place. [2023-11-26 11:51:39,869 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 61 selfloop transitions, 30 changer transitions 7/101 dead transitions. [2023-11-26 11:51:39,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 101 transitions, 1057 flow [2023-11-26 11:51:39,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:51:39,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:51:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2023-11-26 11:51:39,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6023391812865497 [2023-11-26 11:51:39,871 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 103 transitions. [2023-11-26 11:51:39,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 103 transitions. [2023-11-26 11:51:39,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:39,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 103 transitions. [2023-11-26 11:51:39,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 11:51:39,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 11:51:39,874 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 11:51:39,874 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 514 flow. Second operand 9 states and 103 transitions. [2023-11-26 11:51:39,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 101 transitions, 1057 flow [2023-11-26 11:51:39,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 101 transitions, 1022 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-11-26 11:51:39,889 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 769 flow [2023-11-26 11:51:39,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=769, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2023-11-26 11:51:39,890 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 43 predicate places. [2023-11-26 11:51:39,891 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 769 flow [2023-11-26 11:51:39,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 11:51:39,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:39,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:39,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:40,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:40,097 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 11:51:40,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:40,097 INFO L85 PathProgramCache]: Analyzing trace with hash 125095724, now seen corresponding path program 4 times [2023-11-26 11:51:40,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:40,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484633977] [2023-11-26 11:51:40,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:40,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:40,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:40,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484633977] [2023-11-26 11:51:40,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484633977] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:40,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095486899] [2023-11-26 11:51:40,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:51:40,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:40,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:40,184 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:40,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:51:40,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:51:40,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:40,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:51:40,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:40,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:40,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095486899] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:40,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:40,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-26 11:51:40,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688328342] [2023-11-26 11:51:40,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:40,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:51:40,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:40,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:51:40,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:51:40,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:40,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 769 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 11:51:40,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:40,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:40,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:40,665 INFO L124 PetriNetUnfolderBase]: 183/423 cut-off events. [2023-11-26 11:51:40,665 INFO L125 PetriNetUnfolderBase]: For 3548/3548 co-relation queries the response was YES. [2023-11-26 11:51:40,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2443 conditions, 423 events. 183/423 cut-off events. For 3548/3548 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2113 event pairs, 8 based on Foata normal form. 4/427 useless extension candidates. Maximal degree in co-relation 2059. Up to 119 conditions per place. [2023-11-26 11:51:40,672 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 64 selfloop transitions, 45 changer transitions 0/112 dead transitions. [2023-11-26 11:51:40,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 112 transitions, 1318 flow [2023-11-26 11:51:40,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:51:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-26 11:51:40,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2023-11-26 11:51:40,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5885167464114832 [2023-11-26 11:51:40,675 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 123 transitions. [2023-11-26 11:51:40,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 123 transitions. [2023-11-26 11:51:40,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:40,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 123 transitions. [2023-11-26 11:51:40,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 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 11:51:40,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 19.0) internal successors, (228), 12 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 11:51:40,677 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 19.0) internal successors, (228), 12 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 11:51:40,677 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 769 flow. Second operand 11 states and 123 transitions. [2023-11-26 11:51:40,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 112 transitions, 1318 flow [2023-11-26 11:51:40,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 112 transitions, 1225 flow, removed 45 selfloop flow, removed 1 redundant places. [2023-11-26 11:51:40,701 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 991 flow [2023-11-26 11:51:40,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=991, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2023-11-26 11:51:40,702 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2023-11-26 11:51:40,702 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 991 flow [2023-11-26 11:51:40,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 11:51:40,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:40,702 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:40,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:40,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:40,908 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 11:51:40,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:40,908 INFO L85 PathProgramCache]: Analyzing trace with hash 35632105, now seen corresponding path program 5 times [2023-11-26 11:51:40,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:40,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815781731] [2023-11-26 11:51:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:40,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:40,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:40,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815781731] [2023-11-26 11:51:40,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815781731] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:40,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672372272] [2023-11-26 11:51:40,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:51:40,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:40,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:40,999 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:41,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:51:41,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-26 11:51:41,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:41,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:51:41,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:41,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:41,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672372272] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:41,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:41,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-26 11:51:41,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809541225] [2023-11-26 11:51:41,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:41,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:51:41,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:41,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:51:41,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:51:41,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:41,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 991 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 11:51:41,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:41,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:41,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:41,444 INFO L124 PetriNetUnfolderBase]: 173/386 cut-off events. [2023-11-26 11:51:41,444 INFO L125 PetriNetUnfolderBase]: For 3533/3533 co-relation queries the response was YES. [2023-11-26 11:51:41,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2337 conditions, 386 events. 173/386 cut-off events. For 3533/3533 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1799 event pairs, 4 based on Foata normal form. 4/390 useless extension candidates. Maximal degree in co-relation 2036. Up to 112 conditions per place. [2023-11-26 11:51:41,451 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 70 selfloop transitions, 25 changer transitions 6/104 dead transitions. [2023-11-26 11:51:41,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 104 transitions, 1401 flow [2023-11-26 11:51:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:51:41,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:51:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2023-11-26 11:51:41,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5421052631578948 [2023-11-26 11:51:41,453 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 103 transitions. [2023-11-26 11:51:41,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 103 transitions. [2023-11-26 11:51:41,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:41,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 103 transitions. [2023-11-26 11:51:41,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 11:51:41,455 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 11:51:41,455 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 11:51:41,455 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 991 flow. Second operand 10 states and 103 transitions. [2023-11-26 11:51:41,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 104 transitions, 1401 flow [2023-11-26 11:51:41,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 104 transitions, 1298 flow, removed 39 selfloop flow, removed 5 redundant places. [2023-11-26 11:51:41,488 INFO L231 Difference]: Finished difference. Result has 83 places, 73 transitions, 955 flow [2023-11-26 11:51:41,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=955, PETRI_PLACES=83, PETRI_TRANSITIONS=73} [2023-11-26 11:51:41,490 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 62 predicate places. [2023-11-26 11:51:41,490 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 73 transitions, 955 flow [2023-11-26 11:51:41,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 11:51:41,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:41,491 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:41,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:41,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:51:41,701 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 11:51:41,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:41,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1493875726, now seen corresponding path program 6 times [2023-11-26 11:51:41,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:41,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908342599] [2023-11-26 11:51:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:41,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:41,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:41,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908342599] [2023-11-26 11:51:41,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908342599] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:41,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707017977] [2023-11-26 11:51:41,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:51:41,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:41,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:41,779 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:41,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:51:41,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-26 11:51:41,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:41,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:51:41,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:41,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:41,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707017977] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:41,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:41,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-26 11:51:41,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460834622] [2023-11-26 11:51:41,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:41,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:51:41,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:41,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:51:41,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:51:41,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:42,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 73 transitions, 955 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 11:51:42,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:42,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:42,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:42,264 INFO L124 PetriNetUnfolderBase]: 197/441 cut-off events. [2023-11-26 11:51:42,264 INFO L125 PetriNetUnfolderBase]: For 4032/4032 co-relation queries the response was YES. [2023-11-26 11:51:42,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2630 conditions, 441 events. 197/441 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2093 event pairs, 6 based on Foata normal form. 10/451 useless extension candidates. Maximal degree in co-relation 2200. Up to 190 conditions per place. [2023-11-26 11:51:42,272 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 74 selfloop transitions, 48 changer transitions 0/125 dead transitions. [2023-11-26 11:51:42,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 125 transitions, 1700 flow [2023-11-26 11:51:42,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:51:42,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:51:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2023-11-26 11:51:42,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482456140350878 [2023-11-26 11:51:42,274 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 125 transitions. [2023-11-26 11:51:42,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 125 transitions. [2023-11-26 11:51:42,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:42,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 125 transitions. [2023-11-26 11:51:42,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 11:51:42,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 19.0) internal successors, (247), 13 states have internal predecessors, (247), 0 states have call successors, (0), 0 states 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 11:51:42,277 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 19.0) internal successors, (247), 13 states have internal predecessors, (247), 0 states have call successors, (0), 0 states 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 11:51:42,277 INFO L175 Difference]: Start difference. First operand has 83 places, 73 transitions, 955 flow. Second operand 12 states and 125 transitions. [2023-11-26 11:51:42,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 125 transitions, 1700 flow [2023-11-26 11:51:42,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 125 transitions, 1550 flow, removed 47 selfloop flow, removed 6 redundant places. [2023-11-26 11:51:42,299 INFO L231 Difference]: Finished difference. Result has 94 places, 97 transitions, 1341 flow [2023-11-26 11:51:42,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1341, PETRI_PLACES=94, PETRI_TRANSITIONS=97} [2023-11-26 11:51:42,300 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 73 predicate places. [2023-11-26 11:51:42,301 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 97 transitions, 1341 flow [2023-11-26 11:51:42,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 11:51:42,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:42,301 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:42,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:42,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:51:42,508 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 11:51:42,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:42,508 INFO L85 PathProgramCache]: Analyzing trace with hash -537405541, now seen corresponding path program 7 times [2023-11-26 11:51:42,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:42,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623465639] [2023-11-26 11:51:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:42,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:42,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:42,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623465639] [2023-11-26 11:51:42,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623465639] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:42,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965553415] [2023-11-26 11:51:42,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 11:51:42,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:42,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:42,589 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:42,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:51:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:42,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:51:42,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:42,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:42,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965553415] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:42,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:42,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-26 11:51:42,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194954447] [2023-11-26 11:51:42,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:42,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:51:42,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:42,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:51:42,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:51:42,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:42,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 97 transitions, 1341 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 11:51:42,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:42,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:42,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:43,085 INFO L124 PetriNetUnfolderBase]: 263/598 cut-off events. [2023-11-26 11:51:43,085 INFO L125 PetriNetUnfolderBase]: For 5708/5708 co-relation queries the response was YES. [2023-11-26 11:51:43,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3750 conditions, 598 events. 263/598 cut-off events. For 5708/5708 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3184 event pairs, 4 based on Foata normal form. 6/604 useless extension candidates. Maximal degree in co-relation 3086. Up to 157 conditions per place. [2023-11-26 11:51:43,096 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 105 selfloop transitions, 63 changer transitions 2/173 dead transitions. [2023-11-26 11:51:43,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 173 transitions, 2379 flow [2023-11-26 11:51:43,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:51:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-26 11:51:43,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2023-11-26 11:51:43,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6172248803827751 [2023-11-26 11:51:43,098 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 129 transitions. [2023-11-26 11:51:43,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 129 transitions. [2023-11-26 11:51:43,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:43,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 129 transitions. [2023-11-26 11:51:43,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 11.727272727272727) internal successors, (129), 11 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 11:51:43,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 19.0) internal successors, (228), 12 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 11:51:43,100 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 19.0) internal successors, (228), 12 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 11:51:43,101 INFO L175 Difference]: Start difference. First operand has 94 places, 97 transitions, 1341 flow. Second operand 11 states and 129 transitions. [2023-11-26 11:51:43,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 173 transitions, 2379 flow [2023-11-26 11:51:43,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 173 transitions, 2251 flow, removed 58 selfloop flow, removed 3 redundant places. [2023-11-26 11:51:43,133 INFO L231 Difference]: Finished difference. Result has 106 places, 125 transitions, 1912 flow [2023-11-26 11:51:43,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1912, PETRI_PLACES=106, PETRI_TRANSITIONS=125} [2023-11-26 11:51:43,134 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 85 predicate places. [2023-11-26 11:51:43,134 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 125 transitions, 1912 flow [2023-11-26 11:51:43,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 11:51:43,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:43,134 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:43,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:43,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:51:43,345 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 11:51:43,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:43,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1184150161, now seen corresponding path program 8 times [2023-11-26 11:51:43,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:43,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685329158] [2023-11-26 11:51:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:43,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:51:43,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:43,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685329158] [2023-11-26 11:51:43,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685329158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:43,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036267027] [2023-11-26 11:51:43,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:51:43,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:43,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:43,414 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:43,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:51:43,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:51:43,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:43,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:51:43,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:43,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:43,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036267027] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:43,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:43,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-26 11:51:43,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097968123] [2023-11-26 11:51:43,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:43,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:51:43,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:43,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:51:43,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:51:43,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:43,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 125 transitions, 1912 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 11:51:43,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:43,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:43,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:43,908 INFO L124 PetriNetUnfolderBase]: 256/577 cut-off events. [2023-11-26 11:51:43,908 INFO L125 PetriNetUnfolderBase]: For 6987/6987 co-relation queries the response was YES. [2023-11-26 11:51:43,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3980 conditions, 577 events. 256/577 cut-off events. For 6987/6987 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3001 event pairs, 22 based on Foata normal form. 4/581 useless extension candidates. Maximal degree in co-relation 3294. Up to 210 conditions per place. [2023-11-26 11:51:43,919 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 98 selfloop transitions, 50 changer transitions 2/153 dead transitions. [2023-11-26 11:51:43,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 153 transitions, 2467 flow [2023-11-26 11:51:43,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:51:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:51:43,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2023-11-26 11:51:43,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5672514619883041 [2023-11-26 11:51:43,921 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 97 transitions. [2023-11-26 11:51:43,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 97 transitions. [2023-11-26 11:51:43,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:43,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 97 transitions. [2023-11-26 11:51:43,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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 11:51:43,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 11:51:43,923 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 11:51:43,923 INFO L175 Difference]: Start difference. First operand has 106 places, 125 transitions, 1912 flow. Second operand 9 states and 97 transitions. [2023-11-26 11:51:43,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 153 transitions, 2467 flow [2023-11-26 11:51:43,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 153 transitions, 2310 flow, removed 77 selfloop flow, removed 1 redundant places. [2023-11-26 11:51:43,969 INFO L231 Difference]: Finished difference. Result has 115 places, 127 transitions, 1974 flow [2023-11-26 11:51:43,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1974, PETRI_PLACES=115, PETRI_TRANSITIONS=127} [2023-11-26 11:51:43,970 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 94 predicate places. [2023-11-26 11:51:43,970 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 127 transitions, 1974 flow [2023-11-26 11:51:43,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 11:51:43,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:43,971 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:43,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:44,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:44,176 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 11:51:44,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:44,177 INFO L85 PathProgramCache]: Analyzing trace with hash -132007143, now seen corresponding path program 9 times [2023-11-26 11:51:44,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:44,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958167934] [2023-11-26 11:51:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:44,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:44,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:44,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958167934] [2023-11-26 11:51:44,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958167934] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:44,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276793345] [2023-11-26 11:51:44,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:51:44,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:44,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:44,254 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:44,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:51:44,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 11:51:44,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:44,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:51:44,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:44,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:44,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276793345] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:44,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:44,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-26 11:51:44,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929933314] [2023-11-26 11:51:44,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:44,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:51:44,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:44,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:51:44,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:51:44,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:44,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 127 transitions, 1974 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 11:51:44,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:44,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:44,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:44,708 INFO L124 PetriNetUnfolderBase]: 247/557 cut-off events. [2023-11-26 11:51:44,708 INFO L125 PetriNetUnfolderBase]: For 6636/6636 co-relation queries the response was YES. [2023-11-26 11:51:44,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3849 conditions, 557 events. 247/557 cut-off events. For 6636/6636 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2870 event pairs, 24 based on Foata normal form. 4/561 useless extension candidates. Maximal degree in co-relation 3260. Up to 206 conditions per place. [2023-11-26 11:51:44,719 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 97 selfloop transitions, 45 changer transitions 5/150 dead transitions. [2023-11-26 11:51:44,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 150 transitions, 2430 flow [2023-11-26 11:51:44,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:51:44,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:51:44,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2023-11-26 11:51:44,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5672514619883041 [2023-11-26 11:51:44,721 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 97 transitions. [2023-11-26 11:51:44,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 97 transitions. [2023-11-26 11:51:44,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:44,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 97 transitions. [2023-11-26 11:51:44,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 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 11:51:44,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 11:51:44,723 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 11:51:44,723 INFO L175 Difference]: Start difference. First operand has 115 places, 127 transitions, 1974 flow. Second operand 9 states and 97 transitions. [2023-11-26 11:51:44,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 150 transitions, 2430 flow [2023-11-26 11:51:44,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 150 transitions, 2359 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-11-26 11:51:44,767 INFO L231 Difference]: Finished difference. Result has 118 places, 121 transitions, 1901 flow [2023-11-26 11:51:44,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1901, PETRI_PLACES=118, PETRI_TRANSITIONS=121} [2023-11-26 11:51:44,768 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 97 predicate places. [2023-11-26 11:51:44,768 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 121 transitions, 1901 flow [2023-11-26 11:51:44,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 11:51:44,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:44,768 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:44,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:44,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:44,974 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 11:51:44,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:44,974 INFO L85 PathProgramCache]: Analyzing trace with hash -456275256, now seen corresponding path program 10 times [2023-11-26 11:51:44,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:44,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731180918] [2023-11-26 11:51:44,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:44,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:45,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:45,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731180918] [2023-11-26 11:51:45,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731180918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:45,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208908049] [2023-11-26 11:51:45,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:51:45,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:45,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:45,031 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:45,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:51:45,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:51:45,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:45,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:51:45,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:45,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:45,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208908049] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:45,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:45,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-26 11:51:45,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510353010] [2023-11-26 11:51:45,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:45,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:51:45,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:45,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:51:45,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:51:45,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:45,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 121 transitions, 1901 flow. Second operand has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 11:51:45,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:45,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:45,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:45,516 INFO L124 PetriNetUnfolderBase]: 230/512 cut-off events. [2023-11-26 11:51:45,516 INFO L125 PetriNetUnfolderBase]: For 6636/6636 co-relation queries the response was YES. [2023-11-26 11:51:45,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3583 conditions, 512 events. 230/512 cut-off events. For 6636/6636 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2540 event pairs, 14 based on Foata normal form. 8/520 useless extension candidates. Maximal degree in co-relation 3157. Up to 210 conditions per place. [2023-11-26 11:51:45,525 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 93 selfloop transitions, 41 changer transitions 1/138 dead transitions. [2023-11-26 11:51:45,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 138 transitions, 2270 flow [2023-11-26 11:51:45,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:51:45,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:51:45,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2023-11-26 11:51:45,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210526315789473 [2023-11-26 11:51:45,528 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 99 transitions. [2023-11-26 11:51:45,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 99 transitions. [2023-11-26 11:51:45,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:45,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 99 transitions. [2023-11-26 11:51:45,529 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 11:51:45,530 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 11:51:45,530 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 11:51:45,530 INFO L175 Difference]: Start difference. First operand has 118 places, 121 transitions, 1901 flow. Second operand 10 states and 99 transitions. [2023-11-26 11:51:45,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 138 transitions, 2270 flow [2023-11-26 11:51:45,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 138 transitions, 2201 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-11-26 11:51:45,570 INFO L231 Difference]: Finished difference. Result has 123 places, 117 transitions, 1850 flow [2023-11-26 11:51:45,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1850, PETRI_PLACES=123, PETRI_TRANSITIONS=117} [2023-11-26 11:51:45,572 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2023-11-26 11:51:45,572 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 117 transitions, 1850 flow [2023-11-26 11:51:45,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 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 11:51:45,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:45,572 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:45,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-26 11:51:45,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:45,778 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 11:51:45,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:45,778 INFO L85 PathProgramCache]: Analyzing trace with hash 434649007, now seen corresponding path program 11 times [2023-11-26 11:51:45,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:45,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618832566] [2023-11-26 11:51:45,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:45,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:45,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:45,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618832566] [2023-11-26 11:51:45,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618832566] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:45,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31268701] [2023-11-26 11:51:45,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:51:45,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:45,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:45,921 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:45,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:51:46,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:51:46,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:46,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:51:46,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:46,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:46,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31268701] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:46,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:46,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 14 [2023-11-26 11:51:46,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936424172] [2023-11-26 11:51:46,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:46,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:51:46,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:46,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:51:46,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:51:46,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:46,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 117 transitions, 1850 flow. Second operand has 15 states, 15 states have (on average 7.866666666666666) internal successors, (118), 15 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 11:51:46,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:46,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:46,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:46,628 INFO L124 PetriNetUnfolderBase]: 365/774 cut-off events. [2023-11-26 11:51:46,628 INFO L125 PetriNetUnfolderBase]: For 13477/13477 co-relation queries the response was YES. [2023-11-26 11:51:46,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5638 conditions, 774 events. 365/774 cut-off events. For 13477/13477 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4195 event pairs, 23 based on Foata normal form. 35/809 useless extension candidates. Maximal degree in co-relation 5195. Up to 413 conditions per place. [2023-11-26 11:51:46,643 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 139 selfloop transitions, 55 changer transitions 3/200 dead transitions. [2023-11-26 11:51:46,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 200 transitions, 3266 flow [2023-11-26 11:51:46,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:51:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:51:46,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2023-11-26 11:51:46,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2023-11-26 11:51:46,646 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 125 transitions. [2023-11-26 11:51:46,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 125 transitions. [2023-11-26 11:51:46,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:46,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 125 transitions. [2023-11-26 11:51:46,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 11:51:46,648 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 11:51:46,648 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 11:51:46,649 INFO L175 Difference]: Start difference. First operand has 123 places, 117 transitions, 1850 flow. Second operand 10 states and 125 transitions. [2023-11-26 11:51:46,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 200 transitions, 3266 flow [2023-11-26 11:51:46,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 200 transitions, 3174 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-11-26 11:51:46,713 INFO L231 Difference]: Finished difference. Result has 134 places, 154 transitions, 2638 flow [2023-11-26 11:51:46,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1779, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2638, PETRI_PLACES=134, PETRI_TRANSITIONS=154} [2023-11-26 11:51:46,715 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 113 predicate places. [2023-11-26 11:51:46,716 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 154 transitions, 2638 flow [2023-11-26 11:51:46,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.866666666666666) internal successors, (118), 15 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 11:51:46,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:46,716 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:46,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:46,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:46,922 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:51:46,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:46,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1343642123, now seen corresponding path program 12 times [2023-11-26 11:51:46,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:46,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706626885] [2023-11-26 11:51:46,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:46,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:47,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:47,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706626885] [2023-11-26 11:51:47,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706626885] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:47,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387837276] [2023-11-26 11:51:47,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:51:47,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:47,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:47,058 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:47,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:51:47,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-26 11:51:47,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:47,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:51:47,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:47,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:51:47,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387837276] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:47,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:47,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 10 [2023-11-26 11:51:47,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259488476] [2023-11-26 11:51:47,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:47,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:51:47,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:47,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:51:47,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:51:47,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:47,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 154 transitions, 2638 flow. Second operand has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 11:51:47,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:47,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:47,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:47,806 INFO L124 PetriNetUnfolderBase]: 547/1162 cut-off events. [2023-11-26 11:51:47,806 INFO L125 PetriNetUnfolderBase]: For 23927/23927 co-relation queries the response was YES. [2023-11-26 11:51:47,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9288 conditions, 1162 events. 547/1162 cut-off events. For 23927/23927 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 7082 event pairs, 56 based on Foata normal form. 17/1179 useless extension candidates. Maximal degree in co-relation 8738. Up to 721 conditions per place. [2023-11-26 11:51:47,828 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 179 selfloop transitions, 79 changer transitions 7/268 dead transitions. [2023-11-26 11:51:47,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 268 transitions, 4989 flow [2023-11-26 11:51:47,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:51:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-26 11:51:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2023-11-26 11:51:47,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2023-11-26 11:51:47,830 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 133 transitions. [2023-11-26 11:51:47,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 133 transitions. [2023-11-26 11:51:47,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:47,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 133 transitions. [2023-11-26 11:51:47,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 12.090909090909092) internal successors, (133), 11 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 11:51:47,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 19.0) internal successors, (228), 12 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 11:51:47,833 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 19.0) internal successors, (228), 12 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 11:51:47,833 INFO L175 Difference]: Start difference. First operand has 134 places, 154 transitions, 2638 flow. Second operand 11 states and 133 transitions. [2023-11-26 11:51:47,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 268 transitions, 4989 flow [2023-11-26 11:51:47,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 268 transitions, 4800 flow, removed 91 selfloop flow, removed 1 redundant places. [2023-11-26 11:51:47,940 INFO L231 Difference]: Finished difference. Result has 150 places, 217 transitions, 4149 flow [2023-11-26 11:51:47,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4149, PETRI_PLACES=150, PETRI_TRANSITIONS=217} [2023-11-26 11:51:47,941 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 129 predicate places. [2023-11-26 11:51:47,941 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 217 transitions, 4149 flow [2023-11-26 11:51:47,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 11:51:47,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:47,942 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:47,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:48,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:48,148 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:51:48,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:48,148 INFO L85 PathProgramCache]: Analyzing trace with hash 747386425, now seen corresponding path program 13 times [2023-11-26 11:51:48,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:48,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014702764] [2023-11-26 11:51:48,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:48,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:48,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:48,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014702764] [2023-11-26 11:51:48,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014702764] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:48,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802314205] [2023-11-26 11:51:48,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 11:51:48,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:48,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:48,301 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:48,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 11:51:48,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:48,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:51:48,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:48,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:51:48,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802314205] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:48,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:48,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 14 [2023-11-26 11:51:48,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971522313] [2023-11-26 11:51:48,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:48,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:51:48,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:48,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:51:48,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:51:48,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:48,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 217 transitions, 4149 flow. Second operand has 15 states, 15 states have (on average 7.733333333333333) internal successors, (116), 15 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 11:51:48,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:48,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:48,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:49,179 INFO L124 PetriNetUnfolderBase]: 649/1348 cut-off events. [2023-11-26 11:51:49,179 INFO L125 PetriNetUnfolderBase]: For 36310/36310 co-relation queries the response was YES. [2023-11-26 11:51:49,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11645 conditions, 1348 events. 649/1348 cut-off events. For 36310/36310 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8352 event pairs, 85 based on Foata normal form. 36/1384 useless extension candidates. Maximal degree in co-relation 11065. Up to 1018 conditions per place. [2023-11-26 11:51:49,206 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 221 selfloop transitions, 67 changer transitions 5/296 dead transitions. [2023-11-26 11:51:49,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 296 transitions, 6014 flow [2023-11-26 11:51:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:51:49,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:51:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2023-11-26 11:51:49,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6157894736842106 [2023-11-26 11:51:49,208 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 117 transitions. [2023-11-26 11:51:49,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 117 transitions. [2023-11-26 11:51:49,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:49,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 117 transitions. [2023-11-26 11:51:49,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:51:49,210 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 11:51:49,211 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 11:51:49,211 INFO L175 Difference]: Start difference. First operand has 150 places, 217 transitions, 4149 flow. Second operand 10 states and 117 transitions. [2023-11-26 11:51:49,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 296 transitions, 6014 flow [2023-11-26 11:51:49,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 296 transitions, 5313 flow, removed 319 selfloop flow, removed 2 redundant places. [2023-11-26 11:51:49,389 INFO L231 Difference]: Finished difference. Result has 162 places, 254 transitions, 4490 flow [2023-11-26 11:51:49,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=3472, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4490, PETRI_PLACES=162, PETRI_TRANSITIONS=254} [2023-11-26 11:51:49,390 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 141 predicate places. [2023-11-26 11:51:49,391 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 254 transitions, 4490 flow [2023-11-26 11:51:49,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.733333333333333) internal successors, (116), 15 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 11:51:49,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:49,391 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:49,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:49,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 11:51:49,597 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:51:49,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:49,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1760013907, now seen corresponding path program 14 times [2023-11-26 11:51:49,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:49,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107944315] [2023-11-26 11:51:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:49,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:49,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:49,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107944315] [2023-11-26 11:51:49,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107944315] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:49,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607363430] [2023-11-26 11:51:49,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:51:49,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:49,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:49,735 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:49,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 11:51:49,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:51:49,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:49,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:51:49,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:49,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:49,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607363430] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:49,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:49,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-26 11:51:49,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060702260] [2023-11-26 11:51:49,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:49,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:51:49,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:49,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:51:49,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:51:49,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:49,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 254 transitions, 4490 flow. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 11:51:49,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:49,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:49,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:50,581 INFO L124 PetriNetUnfolderBase]: 665/1436 cut-off events. [2023-11-26 11:51:50,581 INFO L125 PetriNetUnfolderBase]: For 43107/43107 co-relation queries the response was YES. [2023-11-26 11:51:50,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12078 conditions, 1436 events. 665/1436 cut-off events. For 43107/43107 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9327 event pairs, 14 based on Foata normal form. 40/1476 useless extension candidates. Maximal degree in co-relation 11711. Up to 512 conditions per place. [2023-11-26 11:51:50,607 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 160 selfloop transitions, 152 changer transitions 19/334 dead transitions. [2023-11-26 11:51:50,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 334 transitions, 6499 flow [2023-11-26 11:51:50,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:51:50,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:51:50,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2023-11-26 11:51:50,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6008771929824561 [2023-11-26 11:51:50,609 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 137 transitions. [2023-11-26 11:51:50,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 137 transitions. [2023-11-26 11:51:50,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:50,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 137 transitions. [2023-11-26 11:51:50,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 11.416666666666666) internal successors, (137), 12 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 11:51:50,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 19.0) internal successors, (247), 13 states have internal predecessors, (247), 0 states have call successors, (0), 0 states 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 11:51:50,611 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 19.0) internal successors, (247), 13 states have internal predecessors, (247), 0 states have call successors, (0), 0 states 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 11:51:50,611 INFO L175 Difference]: Start difference. First operand has 162 places, 254 transitions, 4490 flow. Second operand 12 states and 137 transitions. [2023-11-26 11:51:50,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 334 transitions, 6499 flow [2023-11-26 11:51:50,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 334 transitions, 6122 flow, removed 177 selfloop flow, removed 5 redundant places. [2023-11-26 11:51:50,750 INFO L231 Difference]: Finished difference. Result has 174 places, 271 transitions, 5406 flow [2023-11-26 11:51:50,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4165, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5406, PETRI_PLACES=174, PETRI_TRANSITIONS=271} [2023-11-26 11:51:50,751 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 153 predicate places. [2023-11-26 11:51:50,751 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 271 transitions, 5406 flow [2023-11-26 11:51:50,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 11:51:50,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:50,751 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:50,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:50,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:50,952 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:51:50,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:50,952 INFO L85 PathProgramCache]: Analyzing trace with hash -4446129, now seen corresponding path program 15 times [2023-11-26 11:51:50,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:50,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230888004] [2023-11-26 11:51:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:50,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:51,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:51,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230888004] [2023-11-26 11:51:51,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230888004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:51,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781422073] [2023-11-26 11:51:51,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:51:51,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:51,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:51,029 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:51,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 11:51:51,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 11:51:51,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:51,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:51:51,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:51:51,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:51,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781422073] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:51,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:51:51,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-11-26 11:51:51,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486827107] [2023-11-26 11:51:51,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:51,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:51:51,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:51,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:51:51,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:51:51,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:51,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 271 transitions, 5406 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 11:51:51,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:51,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:51,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:51,814 INFO L124 PetriNetUnfolderBase]: 679/1536 cut-off events. [2023-11-26 11:51:51,815 INFO L125 PetriNetUnfolderBase]: For 50972/50972 co-relation queries the response was YES. [2023-11-26 11:51:51,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13583 conditions, 1536 events. 679/1536 cut-off events. For 50972/50972 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 10733 event pairs, 31 based on Foata normal form. 20/1556 useless extension candidates. Maximal degree in co-relation 12584. Up to 633 conditions per place. [2023-11-26 11:51:51,843 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 213 selfloop transitions, 33 changer transitions 85/334 dead transitions. [2023-11-26 11:51:51,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 334 transitions, 7174 flow [2023-11-26 11:51:51,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:51:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:51:51,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 68 transitions. [2023-11-26 11:51:51,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2023-11-26 11:51:51,845 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 68 transitions. [2023-11-26 11:51:51,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 68 transitions. [2023-11-26 11:51:51,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:51,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 68 transitions. [2023-11-26 11:51:51,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 11:51:51,847 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 11:51:51,847 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 11:51:51,847 INFO L175 Difference]: Start difference. First operand has 174 places, 271 transitions, 5406 flow. Second operand 6 states and 68 transitions. [2023-11-26 11:51:51,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 334 transitions, 7174 flow [2023-11-26 11:51:52,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 334 transitions, 6609 flow, removed 281 selfloop flow, removed 1 redundant places. [2023-11-26 11:51:52,123 INFO L231 Difference]: Finished difference. Result has 182 places, 222 transitions, 4278 flow [2023-11-26 11:51:52,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4969, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4278, PETRI_PLACES=182, PETRI_TRANSITIONS=222} [2023-11-26 11:51:52,124 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 161 predicate places. [2023-11-26 11:51:52,124 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 222 transitions, 4278 flow [2023-11-26 11:51:52,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 11:51:52,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:52,125 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:52,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:52,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:52,336 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:51:52,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:52,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1835444857, now seen corresponding path program 16 times [2023-11-26 11:51:52,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:52,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129369080] [2023-11-26 11:51:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:52,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:52,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:52,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129369080] [2023-11-26 11:51:52,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129369080] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:52,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323351191] [2023-11-26 11:51:52,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:51:52,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:52,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:52,425 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:52,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-26 11:51:52,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:51:52,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:52,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:51:52,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:52,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:52,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323351191] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:52,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:52,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-26 11:51:52,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872199271] [2023-11-26 11:51:52,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:52,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:51:52,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:52,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:51:52,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:51:52,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:52,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 222 transitions, 4278 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 11:51:52,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:52,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:52,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:53,313 INFO L124 PetriNetUnfolderBase]: 526/1136 cut-off events. [2023-11-26 11:51:53,313 INFO L125 PetriNetUnfolderBase]: For 25782/25782 co-relation queries the response was YES. [2023-11-26 11:51:53,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9380 conditions, 1136 events. 526/1136 cut-off events. For 25782/25782 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6950 event pairs, 28 based on Foata normal form. 2/1138 useless extension candidates. Maximal degree in co-relation 9181. Up to 291 conditions per place. [2023-11-26 11:51:53,331 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 119 selfloop transitions, 159 changer transitions 3/284 dead transitions. [2023-11-26 11:51:53,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 284 transitions, 5429 flow [2023-11-26 11:51:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 11:51:53,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-26 11:51:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 194 transitions. [2023-11-26 11:51:53,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373961218836565 [2023-11-26 11:51:53,338 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 194 transitions. [2023-11-26 11:51:53,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 194 transitions. [2023-11-26 11:51:53,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:53,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 194 transitions. [2023-11-26 11:51:53,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 10.210526315789474) internal successors, (194), 19 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 11:51:53,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 19.0) internal successors, (380), 20 states have internal predecessors, (380), 0 states have call successors, (0), 0 states 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 11:51:53,351 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 19.0) internal successors, (380), 20 states have internal predecessors, (380), 0 states have call successors, (0), 0 states 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 11:51:53,351 INFO L175 Difference]: Start difference. First operand has 182 places, 222 transitions, 4278 flow. Second operand 19 states and 194 transitions. [2023-11-26 11:51:53,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 284 transitions, 5429 flow [2023-11-26 11:51:53,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 284 transitions, 5180 flow, removed 61 selfloop flow, removed 10 redundant places. [2023-11-26 11:51:53,529 INFO L231 Difference]: Finished difference. Result has 191 places, 231 transitions, 4754 flow [2023-11-26 11:51:53,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4051, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4754, PETRI_PLACES=191, PETRI_TRANSITIONS=231} [2023-11-26 11:51:53,530 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 170 predicate places. [2023-11-26 11:51:53,530 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 231 transitions, 4754 flow [2023-11-26 11:51:53,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 11:51:53,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:53,531 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:53,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:53,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:53,738 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:51:53,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:53,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1897874035, now seen corresponding path program 17 times [2023-11-26 11:51:53,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:53,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361512471] [2023-11-26 11:51:53,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:53,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:53,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:53,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361512471] [2023-11-26 11:51:53,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361512471] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:53,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64066263] [2023-11-26 11:51:53,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:51:53,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:53,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:53,815 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:53,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-26 11:51:53,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-26 11:51:53,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:53,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:51:53,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:53,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:54,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64066263] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:54,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:54,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-26 11:51:54,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007526505] [2023-11-26 11:51:54,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:54,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:51:54,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:54,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:51:54,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:51:54,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:54,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 231 transitions, 4754 flow. Second operand has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 11:51:54,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:54,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:54,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:54,718 INFO L124 PetriNetUnfolderBase]: 570/1242 cut-off events. [2023-11-26 11:51:54,718 INFO L125 PetriNetUnfolderBase]: For 27693/27693 co-relation queries the response was YES. [2023-11-26 11:51:54,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10205 conditions, 1242 events. 570/1242 cut-off events. For 27693/27693 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7700 event pairs, 30 based on Foata normal form. 8/1250 useless extension candidates. Maximal degree in co-relation 9517. Up to 412 conditions per place. [2023-11-26 11:51:54,742 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 137 selfloop transitions, 157 changer transitions 1/298 dead transitions. [2023-11-26 11:51:54,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 298 transitions, 6159 flow [2023-11-26 11:51:54,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 11:51:54,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-26 11:51:54,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 165 transitions. [2023-11-26 11:51:54,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5427631578947368 [2023-11-26 11:51:54,744 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 165 transitions. [2023-11-26 11:51:54,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 165 transitions. [2023-11-26 11:51:54,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:54,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 165 transitions. [2023-11-26 11:51:54,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 10.3125) internal successors, (165), 16 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 11:51:54,746 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 11:51:54,746 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 11:51:54,746 INFO L175 Difference]: Start difference. First operand has 191 places, 231 transitions, 4754 flow. Second operand 16 states and 165 transitions. [2023-11-26 11:51:54,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 298 transitions, 6159 flow [2023-11-26 11:51:54,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 298 transitions, 5876 flow, removed 105 selfloop flow, removed 7 redundant places. [2023-11-26 11:51:54,955 INFO L231 Difference]: Finished difference. Result has 207 places, 256 transitions, 5675 flow [2023-11-26 11:51:54,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4525, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5675, PETRI_PLACES=207, PETRI_TRANSITIONS=256} [2023-11-26 11:51:54,956 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 186 predicate places. [2023-11-26 11:51:54,957 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 256 transitions, 5675 flow [2023-11-26 11:51:54,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 11:51:54,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:54,957 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:54,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:55,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:55,163 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:51:55,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:55,163 INFO L85 PathProgramCache]: Analyzing trace with hash 490591320, now seen corresponding path program 18 times [2023-11-26 11:51:55,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:55,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739344879] [2023-11-26 11:51:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:55,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:51:55,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:55,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739344879] [2023-11-26 11:51:55,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739344879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:55,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846416368] [2023-11-26 11:51:55,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:51:55,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:55,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:55,258 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:55,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-26 11:51:55,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-26 11:51:55,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:55,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:51:55,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:55,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:55,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846416368] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:55,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:55,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-26 11:51:55,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438371308] [2023-11-26 11:51:55,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:55,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:51:55,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:55,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:51:55,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:51:55,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:55,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 256 transitions, 5675 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 11:51:55,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:55,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:55,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:56,282 INFO L124 PetriNetUnfolderBase]: 644/1389 cut-off events. [2023-11-26 11:51:56,283 INFO L125 PetriNetUnfolderBase]: For 39977/39977 co-relation queries the response was YES. [2023-11-26 11:51:56,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12480 conditions, 1389 events. 644/1389 cut-off events. For 39977/39977 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8791 event pairs, 30 based on Foata normal form. 20/1409 useless extension candidates. Maximal degree in co-relation 11732. Up to 328 conditions per place. [2023-11-26 11:51:56,311 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 184 selfloop transitions, 164 changer transitions 15/366 dead transitions. [2023-11-26 11:51:56,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 366 transitions, 8162 flow [2023-11-26 11:51:56,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 11:51:56,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-26 11:51:56,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 221 transitions. [2023-11-26 11:51:56,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5538847117794486 [2023-11-26 11:51:56,313 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 221 transitions. [2023-11-26 11:51:56,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 221 transitions. [2023-11-26 11:51:56,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:56,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 221 transitions. [2023-11-26 11:51:56,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 10.523809523809524) internal successors, (221), 21 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:56,316 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 11:51:56,316 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 11:51:56,316 INFO L175 Difference]: Start difference. First operand has 207 places, 256 transitions, 5675 flow. Second operand 21 states and 221 transitions. [2023-11-26 11:51:56,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 366 transitions, 8162 flow [2023-11-26 11:51:56,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 366 transitions, 7852 flow, removed 88 selfloop flow, removed 9 redundant places. [2023-11-26 11:51:56,528 INFO L231 Difference]: Finished difference. Result has 227 places, 291 transitions, 7040 flow [2023-11-26 11:51:56,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5415, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7040, PETRI_PLACES=227, PETRI_TRANSITIONS=291} [2023-11-26 11:51:56,529 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 206 predicate places. [2023-11-26 11:51:56,529 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 291 transitions, 7040 flow [2023-11-26 11:51:56,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 11:51:56,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:56,529 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:56,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:56,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-26 11:51:56,729 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:51:56,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:56,730 INFO L85 PathProgramCache]: Analyzing trace with hash 73020265, now seen corresponding path program 19 times [2023-11-26 11:51:56,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:56,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933549170] [2023-11-26 11:51:56,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:56,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:51:56,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:56,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933549170] [2023-11-26 11:51:56,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933549170] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:56,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720649409] [2023-11-26 11:51:56,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 11:51:56,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:56,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:56,811 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:56,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-26 11:51:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:56,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:51:56,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:57,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:57,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720649409] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:57,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:57,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-26 11:51:57,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940760658] [2023-11-26 11:51:57,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:57,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:51:57,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:57,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:51:57,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:51:57,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:57,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 291 transitions, 7040 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 11:51:57,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:57,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:57,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:57,729 INFO L124 PetriNetUnfolderBase]: 614/1289 cut-off events. [2023-11-26 11:51:57,730 INFO L125 PetriNetUnfolderBase]: For 40344/40344 co-relation queries the response was YES. [2023-11-26 11:51:57,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12360 conditions, 1289 events. 614/1289 cut-off events. For 40344/40344 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7793 event pairs, 38 based on Foata normal form. 20/1309 useless extension candidates. Maximal degree in co-relation 12117. Up to 452 conditions per place. [2023-11-26 11:51:57,757 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 177 selfloop transitions, 145 changer transitions 7/332 dead transitions. [2023-11-26 11:51:57,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 332 transitions, 8056 flow [2023-11-26 11:51:57,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:51:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-26 11:51:57,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 150 transitions. [2023-11-26 11:51:57,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5639097744360902 [2023-11-26 11:51:57,760 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 150 transitions. [2023-11-26 11:51:57,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 150 transitions. [2023-11-26 11:51:57,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:57,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 150 transitions. [2023-11-26 11:51:57,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 10.714285714285714) internal successors, (150), 14 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 11:51:57,763 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 11:51:57,763 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 11:51:57,764 INFO L175 Difference]: Start difference. First operand has 227 places, 291 transitions, 7040 flow. Second operand 14 states and 150 transitions. [2023-11-26 11:51:57,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 332 transitions, 8056 flow [2023-11-26 11:51:58,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 332 transitions, 7296 flow, removed 351 selfloop flow, removed 5 redundant places. [2023-11-26 11:51:58,218 INFO L231 Difference]: Finished difference. Result has 235 places, 287 transitions, 6468 flow [2023-11-26 11:51:58,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6071, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6468, PETRI_PLACES=235, PETRI_TRANSITIONS=287} [2023-11-26 11:51:58,219 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 214 predicate places. [2023-11-26 11:51:58,219 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 287 transitions, 6468 flow [2023-11-26 11:51:58,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 11:51:58,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:58,220 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:58,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:58,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-26 11:51:58,427 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:51:58,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:58,427 INFO L85 PathProgramCache]: Analyzing trace with hash 31709123, now seen corresponding path program 20 times [2023-11-26 11:51:58,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:58,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48667256] [2023-11-26 11:51:58,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:58,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:58,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:58,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48667256] [2023-11-26 11:51:58,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48667256] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:51:58,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182325510] [2023-11-26 11:51:58,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:51:58,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:58,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:58,557 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:58,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-26 11:51:58,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:51:58,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:51:58,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:51:58,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:58,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:58,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182325510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:58,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:51:58,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-26 11:51:58,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085504027] [2023-11-26 11:51:58,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:58,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:51:58,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:58,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:51:58,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:51:58,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:51:58,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 287 transitions, 6468 flow. Second operand has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 11:51:58,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:51:58,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:51:58,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:51:59,524 INFO L124 PetriNetUnfolderBase]: 601/1230 cut-off events. [2023-11-26 11:51:59,524 INFO L125 PetriNetUnfolderBase]: For 31410/31410 co-relation queries the response was YES. [2023-11-26 11:51:59,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11443 conditions, 1230 events. 601/1230 cut-off events. For 31410/31410 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7160 event pairs, 32 based on Foata normal form. 16/1246 useless extension candidates. Maximal degree in co-relation 11119. Up to 454 conditions per place. [2023-11-26 11:51:59,548 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 177 selfloop transitions, 143 changer transitions 9/332 dead transitions. [2023-11-26 11:51:59,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 332 transitions, 7734 flow [2023-11-26 11:51:59,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 11:51:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-26 11:51:59,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 156 transitions. [2023-11-26 11:51:59,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131578947368421 [2023-11-26 11:51:59,550 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 156 transitions. [2023-11-26 11:51:59,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 156 transitions. [2023-11-26 11:51:59,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:51:59,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 156 transitions. [2023-11-26 11:51:59,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 9.75) internal successors, (156), 16 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 11:51:59,552 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 11:51:59,553 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 11:51:59,553 INFO L175 Difference]: Start difference. First operand has 235 places, 287 transitions, 6468 flow. Second operand 16 states and 156 transitions. [2023-11-26 11:51:59,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 332 transitions, 7734 flow [2023-11-26 11:51:59,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 332 transitions, 7550 flow, removed 53 selfloop flow, removed 10 redundant places. [2023-11-26 11:51:59,825 INFO L231 Difference]: Finished difference. Result has 240 places, 287 transitions, 6613 flow [2023-11-26 11:51:59,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6185, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6613, PETRI_PLACES=240, PETRI_TRANSITIONS=287} [2023-11-26 11:51:59,826 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 219 predicate places. [2023-11-26 11:51:59,826 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 287 transitions, 6613 flow [2023-11-26 11:51:59,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 11:51:59,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:51:59,827 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:59,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:00,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-26 11:52:00,033 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:52:00,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:00,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1827169076, now seen corresponding path program 21 times [2023-11-26 11:52:00,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:00,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540967369] [2023-11-26 11:52:00,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:00,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:00,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:00,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540967369] [2023-11-26 11:52:00,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540967369] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:00,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45650838] [2023-11-26 11:52:00,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:52:00,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:00,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:00,146 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:00,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-26 11:52:00,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 11:52:00,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:00,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:52:00,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:52:00,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:00,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45650838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:00,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:00,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-11-26 11:52:00,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517869406] [2023-11-26 11:52:00,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:00,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:52:00,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:00,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:52:00,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:52:00,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:52:00,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 287 transitions, 6613 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 11:52:00,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:00,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:52:00,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:00,812 INFO L124 PetriNetUnfolderBase]: 581/1179 cut-off events. [2023-11-26 11:52:00,812 INFO L125 PetriNetUnfolderBase]: For 31663/31665 co-relation queries the response was YES. [2023-11-26 11:52:00,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11059 conditions, 1179 events. 581/1179 cut-off events. For 31663/31665 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6751 event pairs, 38 based on Foata normal form. 4/1183 useless extension candidates. Maximal degree in co-relation 10740. Up to 791 conditions per place. [2023-11-26 11:52:00,837 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 246 selfloop transitions, 23 changer transitions 29/301 dead transitions. [2023-11-26 11:52:00,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 301 transitions, 7354 flow [2023-11-26 11:52:00,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:52:00,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:52:00,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2023-11-26 11:52:00,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2023-11-26 11:52:00,845 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 62 transitions. [2023-11-26 11:52:00,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 62 transitions. [2023-11-26 11:52:00,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:00,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 62 transitions. [2023-11-26 11:52:00,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 11:52:00,853 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 11:52:00,853 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 11:52:00,853 INFO L175 Difference]: Start difference. First operand has 240 places, 287 transitions, 6613 flow. Second operand 6 states and 62 transitions. [2023-11-26 11:52:00,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 301 transitions, 7354 flow [2023-11-26 11:52:01,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 301 transitions, 6984 flow, removed 89 selfloop flow, removed 12 redundant places. [2023-11-26 11:52:01,119 INFO L231 Difference]: Finished difference. Result has 233 places, 263 transitions, 5904 flow [2023-11-26 11:52:01,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6233, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5904, PETRI_PLACES=233, PETRI_TRANSITIONS=263} [2023-11-26 11:52:01,121 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 212 predicate places. [2023-11-26 11:52:01,121 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 263 transitions, 5904 flow [2023-11-26 11:52:01,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 11:52:01,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:01,122 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:01,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:01,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-26 11:52:01,328 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:52:01,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:01,329 INFO L85 PathProgramCache]: Analyzing trace with hash 325349272, now seen corresponding path program 22 times [2023-11-26 11:52:01,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:01,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868612142] [2023-11-26 11:52:01,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:01,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:01,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:01,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868612142] [2023-11-26 11:52:01,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868612142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:01,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193972881] [2023-11-26 11:52:01,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:52:01,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:01,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:01,421 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:01,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-26 11:52:01,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:52:01,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:01,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:52:01,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:01,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:01,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193972881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:01,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:52:01,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-26 11:52:01,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528946870] [2023-11-26 11:52:01,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:01,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:52:01,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:01,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:52:01,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:52:01,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:52:01,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 263 transitions, 5904 flow. Second operand has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 11:52:01,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:01,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:52:01,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:02,393 INFO L124 PetriNetUnfolderBase]: 629/1247 cut-off events. [2023-11-26 11:52:02,394 INFO L125 PetriNetUnfolderBase]: For 31483/31483 co-relation queries the response was YES. [2023-11-26 11:52:02,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11144 conditions, 1247 events. 629/1247 cut-off events. For 31483/31483 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6994 event pairs, 20 based on Foata normal form. 16/1263 useless extension candidates. Maximal degree in co-relation 11012. Up to 349 conditions per place. [2023-11-26 11:52:02,413 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 171 selfloop transitions, 181 changer transitions 0/355 dead transitions. [2023-11-26 11:52:02,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 355 transitions, 7683 flow [2023-11-26 11:52:02,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 11:52:02,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-26 11:52:02,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 173 transitions. [2023-11-26 11:52:02,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569078947368421 [2023-11-26 11:52:02,415 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 173 transitions. [2023-11-26 11:52:02,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 173 transitions. [2023-11-26 11:52:02,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:02,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 173 transitions. [2023-11-26 11:52:02,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 10.8125) internal successors, (173), 16 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 11:52:02,417 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 11:52:02,417 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 11:52:02,417 INFO L175 Difference]: Start difference. First operand has 233 places, 263 transitions, 5904 flow. Second operand 16 states and 173 transitions. [2023-11-26 11:52:02,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 355 transitions, 7683 flow [2023-11-26 11:52:02,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 355 transitions, 6949 flow, removed 76 selfloop flow, removed 22 redundant places. [2023-11-26 11:52:02,643 INFO L231 Difference]: Finished difference. Result has 217 places, 301 transitions, 6366 flow [2023-11-26 11:52:02,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5213, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6366, PETRI_PLACES=217, PETRI_TRANSITIONS=301} [2023-11-26 11:52:02,644 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 196 predicate places. [2023-11-26 11:52:02,644 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 301 transitions, 6366 flow [2023-11-26 11:52:02,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 11:52:02,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:02,644 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:02,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:02,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-26 11:52:02,850 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:52:02,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:02,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1399867537, now seen corresponding path program 23 times [2023-11-26 11:52:02,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:02,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331165354] [2023-11-26 11:52:02,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:02,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:02,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:02,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331165354] [2023-11-26 11:52:02,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331165354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:02,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047221145] [2023-11-26 11:52:02,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:52:02,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:02,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:02,935 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:02,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-26 11:52:03,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-26 11:52:03,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:03,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:52:03,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:03,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:03,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047221145] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:03,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:52:03,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-26 11:52:03,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599019166] [2023-11-26 11:52:03,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:03,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:52:03,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:03,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:52:03,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:52:03,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:52:03,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 301 transitions, 6366 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 11:52:03,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:03,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:52:03,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:03,657 INFO L124 PetriNetUnfolderBase]: 671/1310 cut-off events. [2023-11-26 11:52:03,657 INFO L125 PetriNetUnfolderBase]: For 24362/24362 co-relation queries the response was YES. [2023-11-26 11:52:03,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11580 conditions, 1310 events. 671/1310 cut-off events. For 24362/24362 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7326 event pairs, 46 based on Foata normal form. 8/1318 useless extension candidates. Maximal degree in co-relation 10863. Up to 822 conditions per place. [2023-11-26 11:52:03,678 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 253 selfloop transitions, 94 changer transitions 9/359 dead transitions. [2023-11-26 11:52:03,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 359 transitions, 7838 flow [2023-11-26 11:52:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:52:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-26 11:52:03,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 127 transitions. [2023-11-26 11:52:03,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4774436090225564 [2023-11-26 11:52:03,679 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 127 transitions. [2023-11-26 11:52:03,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 127 transitions. [2023-11-26 11:52:03,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:03,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 127 transitions. [2023-11-26 11:52:03,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 9.071428571428571) internal successors, (127), 14 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 11:52:03,681 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 11:52:03,681 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 11:52:03,681 INFO L175 Difference]: Start difference. First operand has 217 places, 301 transitions, 6366 flow. Second operand 14 states and 127 transitions. [2023-11-26 11:52:03,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 359 transitions, 7838 flow [2023-11-26 11:52:03,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 359 transitions, 7656 flow, removed 53 selfloop flow, removed 6 redundant places. [2023-11-26 11:52:03,858 INFO L231 Difference]: Finished difference. Result has 226 places, 325 transitions, 6894 flow [2023-11-26 11:52:03,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6150, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6894, PETRI_PLACES=226, PETRI_TRANSITIONS=325} [2023-11-26 11:52:03,859 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 205 predicate places. [2023-11-26 11:52:03,859 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 325 transitions, 6894 flow [2023-11-26 11:52:03,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 11:52:03,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:03,859 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:03,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:04,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-26 11:52:04,065 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:52:04,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:04,065 INFO L85 PathProgramCache]: Analyzing trace with hash -982296482, now seen corresponding path program 24 times [2023-11-26 11:52:04,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:04,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885065688] [2023-11-26 11:52:04,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:04,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:04,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:04,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885065688] [2023-11-26 11:52:04,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885065688] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:04,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043653869] [2023-11-26 11:52:04,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:52:04,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:04,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:04,137 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:04,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-26 11:52:04,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-26 11:52:04,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:04,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:52:04,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:04,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:04,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043653869] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:04,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:52:04,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-26 11:52:04,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264465616] [2023-11-26 11:52:04,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:04,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:52:04,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:04,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:52:04,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:52:04,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:52:04,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 325 transitions, 6894 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 11:52:04,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:04,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:52:04,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:05,174 INFO L124 PetriNetUnfolderBase]: 728/1444 cut-off events. [2023-11-26 11:52:05,174 INFO L125 PetriNetUnfolderBase]: For 37645/37645 co-relation queries the response was YES. [2023-11-26 11:52:05,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13018 conditions, 1444 events. 728/1444 cut-off events. For 37645/37645 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8415 event pairs, 24 based on Foata normal form. 12/1456 useless extension candidates. Maximal degree in co-relation 12515. Up to 318 conditions per place. [2023-11-26 11:52:05,203 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 186 selfloop transitions, 229 changer transitions 2/420 dead transitions. [2023-11-26 11:52:05,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 420 transitions, 8964 flow [2023-11-26 11:52:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 11:52:05,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-26 11:52:05,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 205 transitions. [2023-11-26 11:52:05,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678670360110804 [2023-11-26 11:52:05,205 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 205 transitions. [2023-11-26 11:52:05,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 205 transitions. [2023-11-26 11:52:05,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:05,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 205 transitions. [2023-11-26 11:52:05,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 10.789473684210526) internal successors, (205), 19 states have internal predecessors, (205), 0 states have call successors, (0), 0 states 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 11:52:05,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 19.0) internal successors, (380), 20 states have internal predecessors, (380), 0 states have call successors, (0), 0 states 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 11:52:05,207 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 19.0) internal successors, (380), 20 states have internal predecessors, (380), 0 states have call successors, (0), 0 states 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 11:52:05,207 INFO L175 Difference]: Start difference. First operand has 226 places, 325 transitions, 6894 flow. Second operand 19 states and 205 transitions. [2023-11-26 11:52:05,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 420 transitions, 8964 flow [2023-11-26 11:52:05,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 420 transitions, 8823 flow, removed 42 selfloop flow, removed 4 redundant places. [2023-11-26 11:52:05,479 INFO L231 Difference]: Finished difference. Result has 243 places, 350 transitions, 8153 flow [2023-11-26 11:52:05,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6777, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8153, PETRI_PLACES=243, PETRI_TRANSITIONS=350} [2023-11-26 11:52:05,481 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 222 predicate places. [2023-11-26 11:52:05,481 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 350 transitions, 8153 flow [2023-11-26 11:52:05,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 11:52:05,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:05,482 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:05,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:05,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-26 11:52:05,687 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:52:05,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:05,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2111103210, now seen corresponding path program 25 times [2023-11-26 11:52:05,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:05,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014808478] [2023-11-26 11:52:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:05,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:05,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:05,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014808478] [2023-11-26 11:52:05,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014808478] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:05,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111464048] [2023-11-26 11:52:05,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 11:52:05,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:05,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:05,856 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:05,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-26 11:52:05,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:05,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:52:05,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:06,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:06,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111464048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:06,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:52:06,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 19 [2023-11-26 11:52:06,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741784413] [2023-11-26 11:52:06,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:06,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 11:52:06,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:06,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 11:52:06,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:52:06,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:52:06,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 350 transitions, 8153 flow. Second operand has 20 states, 20 states have (on average 7.45) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 11:52:06,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:06,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:52:06,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:07,043 INFO L124 PetriNetUnfolderBase]: 975/1910 cut-off events. [2023-11-26 11:52:07,043 INFO L125 PetriNetUnfolderBase]: For 70092/70092 co-relation queries the response was YES. [2023-11-26 11:52:07,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18494 conditions, 1910 events. 975/1910 cut-off events. For 70092/70092 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 11828 event pairs, 93 based on Foata normal form. 65/1975 useless extension candidates. Maximal degree in co-relation 17969. Up to 1184 conditions per place. [2023-11-26 11:52:07,076 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 346 selfloop transitions, 127 changer transitions 9/485 dead transitions. [2023-11-26 11:52:07,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 485 transitions, 11567 flow [2023-11-26 11:52:07,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:52:07,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 11:52:07,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 153 transitions. [2023-11-26 11:52:07,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6194331983805668 [2023-11-26 11:52:07,077 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 153 transitions. [2023-11-26 11:52:07,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 153 transitions. [2023-11-26 11:52:07,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:07,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 153 transitions. [2023-11-26 11:52:07,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 11.76923076923077) internal successors, (153), 13 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 11:52:07,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 11:52:07,079 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 11:52:07,080 INFO L175 Difference]: Start difference. First operand has 243 places, 350 transitions, 8153 flow. Second operand 13 states and 153 transitions. [2023-11-26 11:52:07,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 485 transitions, 11567 flow [2023-11-26 11:52:07,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 485 transitions, 11193 flow, removed 95 selfloop flow, removed 7 redundant places. [2023-11-26 11:52:07,426 INFO L231 Difference]: Finished difference. Result has 256 places, 421 transitions, 9902 flow [2023-11-26 11:52:07,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7864, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9902, PETRI_PLACES=256, PETRI_TRANSITIONS=421} [2023-11-26 11:52:07,427 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 235 predicate places. [2023-11-26 11:52:07,427 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 421 transitions, 9902 flow [2023-11-26 11:52:07,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.45) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 11:52:07,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:07,427 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:07,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-26 11:52:07,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:07,633 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:52:07,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:07,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1799459332, now seen corresponding path program 26 times [2023-11-26 11:52:07,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:07,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614339009] [2023-11-26 11:52:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:07,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:52:07,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:07,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614339009] [2023-11-26 11:52:07,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614339009] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:07,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059716402] [2023-11-26 11:52:07,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:52:07,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:07,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:07,816 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:07,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-26 11:52:07,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:52:07,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:07,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:52:07,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:08,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:52:08,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059716402] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:08,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:52:08,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 5] total 13 [2023-11-26 11:52:08,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449866342] [2023-11-26 11:52:08,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:08,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:52:08,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:08,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:52:08,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:52:08,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:52:08,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 421 transitions, 9902 flow. Second operand has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 11:52:08,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:08,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:52:08,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:09,366 INFO L124 PetriNetUnfolderBase]: 1283/2585 cut-off events. [2023-11-26 11:52:09,367 INFO L125 PetriNetUnfolderBase]: For 95666/95666 co-relation queries the response was YES. [2023-11-26 11:52:09,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25971 conditions, 2585 events. 1283/2585 cut-off events. For 95666/95666 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 17596 event pairs, 180 based on Foata normal form. 15/2600 useless extension candidates. Maximal degree in co-relation 25232. Up to 1695 conditions per place. [2023-11-26 11:52:09,415 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 410 selfloop transitions, 174 changer transitions 15/602 dead transitions. [2023-11-26 11:52:09,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 602 transitions, 15054 flow [2023-11-26 11:52:09,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:52:09,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-26 11:52:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 167 transitions. [2023-11-26 11:52:09,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6278195488721805 [2023-11-26 11:52:09,416 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 167 transitions. [2023-11-26 11:52:09,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 167 transitions. [2023-11-26 11:52:09,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:09,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 167 transitions. [2023-11-26 11:52:09,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 11.928571428571429) internal successors, (167), 14 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 11:52:09,418 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 11:52:09,418 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 11:52:09,418 INFO L175 Difference]: Start difference. First operand has 256 places, 421 transitions, 9902 flow. Second operand 14 states and 167 transitions. [2023-11-26 11:52:09,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 602 transitions, 15054 flow [2023-11-26 11:52:10,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 602 transitions, 14730 flow, removed 140 selfloop flow, removed 3 redundant places. [2023-11-26 11:52:10,064 INFO L231 Difference]: Finished difference. Result has 275 places, 529 transitions, 12946 flow [2023-11-26 11:52:10,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=9578, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12946, PETRI_PLACES=275, PETRI_TRANSITIONS=529} [2023-11-26 11:52:10,064 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2023-11-26 11:52:10,065 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 529 transitions, 12946 flow [2023-11-26 11:52:10,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 11:52:10,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:10,065 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:10,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:10,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-26 11:52:10,266 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:52:10,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:10,266 INFO L85 PathProgramCache]: Analyzing trace with hash -446481046, now seen corresponding path program 27 times [2023-11-26 11:52:10,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:10,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373473491] [2023-11-26 11:52:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:10,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:10,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:10,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373473491] [2023-11-26 11:52:10,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373473491] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:10,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827952482] [2023-11-26 11:52:10,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:52:10,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:10,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:10,396 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:10,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-26 11:52:10,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 11:52:10,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:10,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:52:10,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:52:10,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:10,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827952482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:10,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:10,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2023-11-26 11:52:10,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793429099] [2023-11-26 11:52:10,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:10,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:52:10,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:10,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:52:10,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:52:10,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:52:10,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 529 transitions, 12946 flow. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 11:52:10,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:10,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:52:10,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:12,058 INFO L124 PetriNetUnfolderBase]: 1398/2752 cut-off events. [2023-11-26 11:52:12,059 INFO L125 PetriNetUnfolderBase]: For 126862/126864 co-relation queries the response was YES. [2023-11-26 11:52:12,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29279 conditions, 2752 events. 1398/2752 cut-off events. For 126862/126864 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 18962 event pairs, 176 based on Foata normal form. 45/2797 useless extension candidates. Maximal degree in co-relation 28604. Up to 1046 conditions per place. [2023-11-26 11:52:12,166 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 62 selfloop transitions, 7 changer transitions 530/602 dead transitions. [2023-11-26 11:52:12,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 602 transitions, 15762 flow [2023-11-26 11:52:12,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:52:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:52:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 66 transitions. [2023-11-26 11:52:12,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2023-11-26 11:52:12,167 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 66 transitions. [2023-11-26 11:52:12,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 66 transitions. [2023-11-26 11:52:12,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:12,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 66 transitions. [2023-11-26 11:52:12,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 11:52:12,168 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 11:52:12,168 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 11:52:12,168 INFO L175 Difference]: Start difference. First operand has 275 places, 529 transitions, 12946 flow. Second operand 6 states and 66 transitions. [2023-11-26 11:52:12,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 602 transitions, 15762 flow [2023-11-26 11:52:12,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 602 transitions, 14752 flow, removed 497 selfloop flow, removed 2 redundant places. [2023-11-26 11:52:12,824 INFO L231 Difference]: Finished difference. Result has 278 places, 63 transitions, 1309 flow [2023-11-26 11:52:12,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=11988, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1309, PETRI_PLACES=278, PETRI_TRANSITIONS=63} [2023-11-26 11:52:12,825 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 257 predicate places. [2023-11-26 11:52:12,825 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 63 transitions, 1309 flow [2023-11-26 11:52:12,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 11:52:12,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:12,826 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:12,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:13,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-26 11:52:13,032 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:52:13,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:13,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2084499460, now seen corresponding path program 28 times [2023-11-26 11:52:13,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:13,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107581708] [2023-11-26 11:52:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:13,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:13,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:13,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107581708] [2023-11-26 11:52:13,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107581708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:13,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611593310] [2023-11-26 11:52:13,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:52:13,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:13,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:13,229 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:13,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-26 11:52:13,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:52:13,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:13,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:52:13,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:13,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:52:13,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611593310] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:13,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:52:13,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 19 [2023-11-26 11:52:13,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459669019] [2023-11-26 11:52:13,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:13,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 11:52:13,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:13,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 11:52:13,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:52:13,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:52:13,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 63 transitions, 1309 flow. Second operand has 20 states, 20 states have (on average 7.35) internal successors, (147), 20 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 11:52:13,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:13,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:52:13,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:13,891 INFO L124 PetriNetUnfolderBase]: 172/404 cut-off events. [2023-11-26 11:52:13,891 INFO L125 PetriNetUnfolderBase]: For 25454/25454 co-relation queries the response was YES. [2023-11-26 11:52:13,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4240 conditions, 404 events. 172/404 cut-off events. For 25454/25454 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1886 event pairs, 44 based on Foata normal form. 1/405 useless extension candidates. Maximal degree in co-relation 4138. Up to 340 conditions per place. [2023-11-26 11:52:13,896 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 65 selfloop transitions, 14 changer transitions 7/89 dead transitions. [2023-11-26 11:52:13,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 89 transitions, 1800 flow [2023-11-26 11:52:13,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:52:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 11:52:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 113 transitions. [2023-11-26 11:52:13,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574898785425101 [2023-11-26 11:52:13,898 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 113 transitions. [2023-11-26 11:52:13,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 113 transitions. [2023-11-26 11:52:13,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:13,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 113 transitions. [2023-11-26 11:52:13,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 11:52:13,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 11:52:13,899 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 11:52:13,899 INFO L175 Difference]: Start difference. First operand has 278 places, 63 transitions, 1309 flow. Second operand 13 states and 113 transitions. [2023-11-26 11:52:13,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 89 transitions, 1800 flow [2023-11-26 11:52:13,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 89 transitions, 1067 flow, removed 126 selfloop flow, removed 107 redundant places. [2023-11-26 11:52:13,951 INFO L231 Difference]: Finished difference. Result has 129 places, 69 transitions, 825 flow [2023-11-26 11:52:13,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=711, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=825, PETRI_PLACES=129, PETRI_TRANSITIONS=69} [2023-11-26 11:52:13,952 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 108 predicate places. [2023-11-26 11:52:13,952 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 69 transitions, 825 flow [2023-11-26 11:52:13,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.35) internal successors, (147), 20 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 11:52:13,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:13,952 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:13,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-26 11:52:14,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-26 11:52:14,153 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:52:14,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:14,153 INFO L85 PathProgramCache]: Analyzing trace with hash -145117654, now seen corresponding path program 29 times [2023-11-26 11:52:14,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:14,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410515175] [2023-11-26 11:52:14,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:14,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:14,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:14,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410515175] [2023-11-26 11:52:14,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410515175] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:14,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219485662] [2023-11-26 11:52:14,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:52:14,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:14,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:14,264 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:14,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-26 11:52:14,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-26 11:52:14,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:14,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:52:14,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:14,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:14,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219485662] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:14,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:52:14,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-26 11:52:14,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803806059] [2023-11-26 11:52:14,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:14,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:52:14,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:14,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:52:14,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:52:14,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:52:14,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 69 transitions, 825 flow. Second operand has 18 states, 18 states have (on average 7.0) internal successors, (126), 18 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 11:52:14,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:14,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:52:14,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:14,895 INFO L124 PetriNetUnfolderBase]: 158/405 cut-off events. [2023-11-26 11:52:14,895 INFO L125 PetriNetUnfolderBase]: For 6547/6547 co-relation queries the response was YES. [2023-11-26 11:52:14,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2673 conditions, 405 events. 158/405 cut-off events. For 6547/6547 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2008 event pairs, 22 based on Foata normal form. 20/425 useless extension candidates. Maximal degree in co-relation 2618. Up to 150 conditions per place. [2023-11-26 11:52:14,899 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 60 selfloop transitions, 22 changer transitions 30/115 dead transitions. [2023-11-26 11:52:14,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 115 transitions, 1385 flow [2023-11-26 11:52:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:52:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 11:52:14,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 137 transitions. [2023-11-26 11:52:14,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5546558704453441 [2023-11-26 11:52:14,901 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 137 transitions. [2023-11-26 11:52:14,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 137 transitions. [2023-11-26 11:52:14,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:14,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 137 transitions. [2023-11-26 11:52:14,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 10.538461538461538) internal successors, (137), 13 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 11:52:14,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 11:52:14,903 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 11:52:14,903 INFO L175 Difference]: Start difference. First operand has 129 places, 69 transitions, 825 flow. Second operand 13 states and 137 transitions. [2023-11-26 11:52:14,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 115 transitions, 1385 flow [2023-11-26 11:52:14,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 115 transitions, 1255 flow, removed 39 selfloop flow, removed 13 redundant places. [2023-11-26 11:52:14,920 INFO L231 Difference]: Finished difference. Result has 134 places, 63 transitions, 783 flow [2023-11-26 11:52:14,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=783, PETRI_PLACES=134, PETRI_TRANSITIONS=63} [2023-11-26 11:52:14,920 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 113 predicate places. [2023-11-26 11:52:14,921 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 63 transitions, 783 flow [2023-11-26 11:52:14,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.0) internal successors, (126), 18 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 11:52:14,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:14,921 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:14,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-26 11:52:15,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-26 11:52:15,123 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:52:15,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:15,123 INFO L85 PathProgramCache]: Analyzing trace with hash -784272504, now seen corresponding path program 30 times [2023-11-26 11:52:15,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:15,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584547352] [2023-11-26 11:52:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:15,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:15,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:15,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584547352] [2023-11-26 11:52:15,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584547352] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:15,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459073843] [2023-11-26 11:52:15,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:52:15,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:15,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:15,245 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:15,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-26 11:52:15,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-26 11:52:15,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:15,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:52:15,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:52:15,416 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:15,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459073843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:15,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:15,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2023-11-26 11:52:15,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800221389] [2023-11-26 11:52:15,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:15,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:52:15,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:15,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:52:15,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:52:15,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:52:15,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 63 transitions, 783 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 11:52:15,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:15,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:52:15,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:15,561 INFO L124 PetriNetUnfolderBase]: 129/312 cut-off events. [2023-11-26 11:52:15,561 INFO L125 PetriNetUnfolderBase]: For 3917/3917 co-relation queries the response was YES. [2023-11-26 11:52:15,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2081 conditions, 312 events. 129/312 cut-off events. For 3917/3917 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1335 event pairs, 16 based on Foata normal form. 5/317 useless extension candidates. Maximal degree in co-relation 2026. Up to 88 conditions per place. [2023-11-26 11:52:15,566 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 41 selfloop transitions, 4 changer transitions 31/79 dead transitions. [2023-11-26 11:52:15,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 79 transitions, 1023 flow [2023-11-26 11:52:15,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:52:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:52:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 66 transitions. [2023-11-26 11:52:15,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5789473684210527 [2023-11-26 11:52:15,567 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 66 transitions. [2023-11-26 11:52:15,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 66 transitions. [2023-11-26 11:52:15,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:15,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 66 transitions. [2023-11-26 11:52:15,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states 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 11:52:15,569 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 11:52:15,569 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 11:52:15,569 INFO L175 Difference]: Start difference. First operand has 134 places, 63 transitions, 783 flow. Second operand 6 states and 66 transitions. [2023-11-26 11:52:15,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 79 transitions, 1023 flow [2023-11-26 11:52:15,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 79 transitions, 951 flow, removed 21 selfloop flow, removed 6 redundant places. [2023-11-26 11:52:15,591 INFO L231 Difference]: Finished difference. Result has 131 places, 41 transitions, 403 flow [2023-11-26 11:52:15,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=711, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=403, PETRI_PLACES=131, PETRI_TRANSITIONS=41} [2023-11-26 11:52:15,592 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 110 predicate places. [2023-11-26 11:52:15,593 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 41 transitions, 403 flow [2023-11-26 11:52:15,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 11:52:15,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:15,593 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:15,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:15,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:15,799 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:52:15,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:15,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1224297617, now seen corresponding path program 31 times [2023-11-26 11:52:15,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:15,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136580292] [2023-11-26 11:52:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:15,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:15,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:15,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136580292] [2023-11-26 11:52:15,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136580292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:15,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214642168] [2023-11-26 11:52:15,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 11:52:15,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:15,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:15,926 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:15,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-26 11:52:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:16,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:52:16,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:16,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:16,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214642168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:16,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:52:16,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 20 [2023-11-26 11:52:16,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673912391] [2023-11-26 11:52:16,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:16,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 11:52:16,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:16,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 11:52:16,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:52:16,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:52:16,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 41 transitions, 403 flow. Second operand has 21 states, 21 states have (on average 7.0) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 11:52:16,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:16,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:52:16,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:16,499 INFO L124 PetriNetUnfolderBase]: 60/153 cut-off events. [2023-11-26 11:52:16,499 INFO L125 PetriNetUnfolderBase]: For 1663/1663 co-relation queries the response was YES. [2023-11-26 11:52:16,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 911 conditions, 153 events. 60/153 cut-off events. For 1663/1663 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 431 event pairs, 0 based on Foata normal form. 2/155 useless extension candidates. Maximal degree in co-relation 855. Up to 43 conditions per place. [2023-11-26 11:52:16,502 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 48 selfloop transitions, 13 changer transitions 7/71 dead transitions. [2023-11-26 11:52:16,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 71 transitions, 650 flow [2023-11-26 11:52:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:52:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 11:52:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 124 transitions. [2023-11-26 11:52:16,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020242914979757 [2023-11-26 11:52:16,505 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 124 transitions. [2023-11-26 11:52:16,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 124 transitions. [2023-11-26 11:52:16,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:16,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 124 transitions. [2023-11-26 11:52:16,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 9.538461538461538) internal successors, (124), 13 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 11:52:16,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 11:52:16,509 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 11:52:16,509 INFO L175 Difference]: Start difference. First operand has 131 places, 41 transitions, 403 flow. Second operand 13 states and 124 transitions. [2023-11-26 11:52:16,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 71 transitions, 650 flow [2023-11-26 11:52:16,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 71 transitions, 562 flow, removed 13 selfloop flow, removed 24 redundant places. [2023-11-26 11:52:16,518 INFO L231 Difference]: Finished difference. Result has 104 places, 37 transitions, 321 flow [2023-11-26 11:52:16,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=321, PETRI_PLACES=104, PETRI_TRANSITIONS=37} [2023-11-26 11:52:16,519 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2023-11-26 11:52:16,520 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 37 transitions, 321 flow [2023-11-26 11:52:16,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.0) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 11:52:16,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:16,521 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:16,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:16,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:16,727 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:52:16,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:16,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1208213545, now seen corresponding path program 32 times [2023-11-26 11:52:16,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:16,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28503239] [2023-11-26 11:52:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:16,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:16,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:16,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28503239] [2023-11-26 11:52:16,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28503239] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:16,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495289217] [2023-11-26 11:52:16,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:52:16,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:16,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:16,934 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:16,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-26 11:52:17,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:52:17,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:17,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 11:52:17,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:17,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:17,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495289217] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:17,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:52:17,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 24 [2023-11-26 11:52:17,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266134957] [2023-11-26 11:52:17,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:17,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 11:52:17,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:17,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 11:52:17,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2023-11-26 11:52:17,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:52:17,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 37 transitions, 321 flow. Second operand has 25 states, 25 states have (on average 7.2) internal successors, (180), 25 states have internal predecessors, (180), 0 states have call successors, (0), 0 states 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 11:52:17,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:17,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:52:17,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:17,787 INFO L124 PetriNetUnfolderBase]: 85/201 cut-off events. [2023-11-26 11:52:17,787 INFO L125 PetriNetUnfolderBase]: For 1501/1501 co-relation queries the response was YES. [2023-11-26 11:52:17,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1139 conditions, 201 events. 85/201 cut-off events. For 1501/1501 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 629 event pairs, 0 based on Foata normal form. 1/202 useless extension candidates. Maximal degree in co-relation 1098. Up to 68 conditions per place. [2023-11-26 11:52:17,790 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 69 selfloop transitions, 17 changer transitions 3/92 dead transitions. [2023-11-26 11:52:17,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 92 transitions, 755 flow [2023-11-26 11:52:17,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 11:52:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-26 11:52:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 160 transitions. [2023-11-26 11:52:17,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2023-11-26 11:52:17,797 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 160 transitions. [2023-11-26 11:52:17,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 160 transitions. [2023-11-26 11:52:17,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:17,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 160 transitions. [2023-11-26 11:52:17,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 10.0) internal successors, (160), 16 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 11:52:17,799 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 11:52:17,799 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 11:52:17,799 INFO L175 Difference]: Start difference. First operand has 104 places, 37 transitions, 321 flow. Second operand 16 states and 160 transitions. [2023-11-26 11:52:17,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 92 transitions, 755 flow [2023-11-26 11:52:17,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 92 transitions, 692 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-11-26 11:52:17,806 INFO L231 Difference]: Finished difference. Result has 106 places, 44 transitions, 397 flow [2023-11-26 11:52:17,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=397, PETRI_PLACES=106, PETRI_TRANSITIONS=44} [2023-11-26 11:52:17,807 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 85 predicate places. [2023-11-26 11:52:17,807 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 44 transitions, 397 flow [2023-11-26 11:52:17,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.2) internal successors, (180), 25 states have internal predecessors, (180), 0 states have call successors, (0), 0 states 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 11:52:17,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:17,807 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:17,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:18,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-26 11:52:18,012 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:52:18,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:18,012 INFO L85 PathProgramCache]: Analyzing trace with hash -719135895, now seen corresponding path program 33 times [2023-11-26 11:52:18,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:18,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278772249] [2023-11-26 11:52:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:18,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:18,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:18,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278772249] [2023-11-26 11:52:18,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278772249] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:18,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113546153] [2023-11-26 11:52:18,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:52:18,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:18,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:18,219 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:18,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-26 11:52:18,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 11:52:18,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:18,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:52:18,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:52:18,403 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:18,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113546153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:18,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:18,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2023-11-26 11:52:18,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12285985] [2023-11-26 11:52:18,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:18,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:52:18,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:18,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:52:18,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:52:18,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:52:18,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 44 transitions, 397 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 11:52:18,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:18,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:52:18,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:18,487 INFO L124 PetriNetUnfolderBase]: 81/196 cut-off events. [2023-11-26 11:52:18,487 INFO L125 PetriNetUnfolderBase]: For 1138/1138 co-relation queries the response was YES. [2023-11-26 11:52:18,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1070 conditions, 196 events. 81/196 cut-off events. For 1138/1138 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 625 event pairs, 21 based on Foata normal form. 1/197 useless extension candidates. Maximal degree in co-relation 1028. Up to 102 conditions per place. [2023-11-26 11:52:18,490 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 29 selfloop transitions, 2 changer transitions 21/55 dead transitions. [2023-11-26 11:52:18,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 55 transitions, 541 flow [2023-11-26 11:52:18,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:52:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:52:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 61 transitions. [2023-11-26 11:52:18,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5350877192982456 [2023-11-26 11:52:18,491 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 61 transitions. [2023-11-26 11:52:18,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 61 transitions. [2023-11-26 11:52:18,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:18,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 61 transitions. [2023-11-26 11:52:18,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 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 11:52:18,493 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 11:52:18,493 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 11:52:18,493 INFO L175 Difference]: Start difference. First operand has 106 places, 44 transitions, 397 flow. Second operand 6 states and 61 transitions. [2023-11-26 11:52:18,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 55 transitions, 541 flow [2023-11-26 11:52:18,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 55 transitions, 485 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-11-26 11:52:18,500 INFO L231 Difference]: Finished difference. Result has 103 places, 31 transitions, 226 flow [2023-11-26 11:52:18,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=103, PETRI_TRANSITIONS=31} [2023-11-26 11:52:18,501 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 82 predicate places. [2023-11-26 11:52:18,501 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 31 transitions, 226 flow [2023-11-26 11:52:18,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 11:52:18,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:18,502 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:18,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:18,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:18,707 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:52:18,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:18,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1309341031, now seen corresponding path program 34 times [2023-11-26 11:52:18,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:18,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115333419] [2023-11-26 11:52:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:18,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:18,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:18,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115333419] [2023-11-26 11:52:18,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115333419] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:18,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524664326] [2023-11-26 11:52:18,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:52:18,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:18,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:18,844 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:18,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-26 11:52:18,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:52:18,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:18,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:52:18,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:19,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:19,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524664326] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:19,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:52:19,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-11-26 11:52:19,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135202987] [2023-11-26 11:52:19,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:19,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 11:52:19,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:19,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 11:52:19,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2023-11-26 11:52:19,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:52:19,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 31 transitions, 226 flow. Second operand has 22 states, 22 states have (on average 6.818181818181818) internal successors, (150), 22 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 11:52:19,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:19,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:52:19,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:19,383 INFO L124 PetriNetUnfolderBase]: 62/149 cut-off events. [2023-11-26 11:52:19,384 INFO L125 PetriNetUnfolderBase]: For 823/823 co-relation queries the response was YES. [2023-11-26 11:52:19,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 749 conditions, 149 events. 62/149 cut-off events. For 823/823 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 389 event pairs, 10 based on Foata normal form. 4/153 useless extension candidates. Maximal degree in co-relation 707. Up to 60 conditions per place. [2023-11-26 11:52:19,385 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 34 selfloop transitions, 7 changer transitions 24/68 dead transitions. [2023-11-26 11:52:19,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 68 transitions, 472 flow [2023-11-26 11:52:19,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:52:19,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 11:52:19,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 126 transitions. [2023-11-26 11:52:19,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101214574898786 [2023-11-26 11:52:19,386 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 126 transitions. [2023-11-26 11:52:19,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 126 transitions. [2023-11-26 11:52:19,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:19,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 126 transitions. [2023-11-26 11:52:19,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 9.692307692307692) internal successors, (126), 13 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 11:52:19,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 11:52:19,390 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 19.0) internal successors, (266), 14 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 11:52:19,390 INFO L175 Difference]: Start difference. First operand has 103 places, 31 transitions, 226 flow. Second operand 13 states and 126 transitions. [2023-11-26 11:52:19,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 68 transitions, 472 flow [2023-11-26 11:52:19,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 68 transitions, 424 flow, removed 5 selfloop flow, removed 13 redundant places. [2023-11-26 11:52:19,394 INFO L231 Difference]: Finished difference. Result has 88 places, 26 transitions, 167 flow [2023-11-26 11:52:19,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=167, PETRI_PLACES=88, PETRI_TRANSITIONS=26} [2023-11-26 11:52:19,395 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2023-11-26 11:52:19,395 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 26 transitions, 167 flow [2023-11-26 11:52:19,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.818181818181818) internal successors, (150), 22 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 11:52:19,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:19,396 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:19,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:19,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-26 11:52:19,602 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:52:19,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:19,602 INFO L85 PathProgramCache]: Analyzing trace with hash 605978492, now seen corresponding path program 35 times [2023-11-26 11:52:19,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:19,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490206213] [2023-11-26 11:52:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:19,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:19,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:19,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490206213] [2023-11-26 11:52:19,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490206213] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:19,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233655430] [2023-11-26 11:52:19,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:52:19,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:19,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:19,826 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:19,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-26 11:52:19,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-26 11:52:19,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:19,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 11:52:19,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:20,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:20,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233655430] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:20,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:52:20,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 7] total 29 [2023-11-26 11:52:20,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526512313] [2023-11-26 11:52:20,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:20,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-26 11:52:20,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:20,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-26 11:52:20,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2023-11-26 11:52:20,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:52:20,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 26 transitions, 167 flow. Second operand has 30 states, 30 states have (on average 7.033333333333333) internal successors, (211), 30 states have internal predecessors, (211), 0 states have call successors, (0), 0 states 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 11:52:20,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:20,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:52:20,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:20,808 INFO L124 PetriNetUnfolderBase]: 79/178 cut-off events. [2023-11-26 11:52:20,808 INFO L125 PetriNetUnfolderBase]: For 517/517 co-relation queries the response was YES. [2023-11-26 11:52:20,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 844 conditions, 178 events. 79/178 cut-off events. For 517/517 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 467 event pairs, 0 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 811. Up to 33 conditions per place. [2023-11-26 11:52:20,810 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 66 selfloop transitions, 19 changer transitions 3/91 dead transitions. [2023-11-26 11:52:20,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 91 transitions, 586 flow [2023-11-26 11:52:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 11:52:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-26 11:52:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 184 transitions. [2023-11-26 11:52:20,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096952908587258 [2023-11-26 11:52:20,812 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 184 transitions. [2023-11-26 11:52:20,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 184 transitions. [2023-11-26 11:52:20,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:20,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 184 transitions. [2023-11-26 11:52:20,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 9.68421052631579) internal successors, (184), 19 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 11:52:20,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 19.0) internal successors, (380), 20 states have internal predecessors, (380), 0 states have call successors, (0), 0 states 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 11:52:20,814 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 19.0) internal successors, (380), 20 states have internal predecessors, (380), 0 states have call successors, (0), 0 states 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 11:52:20,814 INFO L175 Difference]: Start difference. First operand has 88 places, 26 transitions, 167 flow. Second operand 19 states and 184 transitions. [2023-11-26 11:52:20,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 91 transitions, 586 flow [2023-11-26 11:52:20,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 91 transitions, 562 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-11-26 11:52:20,818 INFO L231 Difference]: Finished difference. Result has 92 places, 34 transitions, 252 flow [2023-11-26 11:52:20,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=252, PETRI_PLACES=92, PETRI_TRANSITIONS=34} [2023-11-26 11:52:20,819 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2023-11-26 11:52:20,819 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 34 transitions, 252 flow [2023-11-26 11:52:20,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.033333333333333) internal successors, (211), 30 states have internal predecessors, (211), 0 states have call successors, (0), 0 states 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 11:52:20,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:52:20,820 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:20,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:21,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:21,024 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:52:21,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:21,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1031512196, now seen corresponding path program 36 times [2023-11-26 11:52:21,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:21,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074770620] [2023-11-26 11:52:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:21,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:21,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:21,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074770620] [2023-11-26 11:52:21,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074770620] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:21,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719640031] [2023-11-26 11:52:21,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:52:21,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:21,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:21,189 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:21,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-26 11:52:21,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-26 11:52:21,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:52:21,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:52:21,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:21,358 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-26 11:52:21,358 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:21,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719640031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:21,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:21,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 18 [2023-11-26 11:52:21,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202797973] [2023-11-26 11:52:21,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:21,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:52:21,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:21,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:52:21,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:52:21,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 19 [2023-11-26 11:52:21,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 34 transitions, 252 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 11:52:21,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:52:21,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 19 [2023-11-26 11:52:21,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:52:21,424 INFO L124 PetriNetUnfolderBase]: 75/172 cut-off events. [2023-11-26 11:52:21,424 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2023-11-26 11:52:21,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 172 events. 75/172 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 460 event pairs, 0 based on Foata normal form. 1/173 useless extension candidates. Maximal degree in co-relation 822. Up to 85 conditions per place. [2023-11-26 11:52:21,426 INFO L140 encePairwiseOnDemand]: 14/19 looper letters, 0 selfloop transitions, 0 changer transitions 44/44 dead transitions. [2023-11-26 11:52:21,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 44 transitions, 357 flow [2023-11-26 11:52:21,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:52:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:52:21,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 57 transitions. [2023-11-26 11:52:21,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-26 11:52:21,427 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 57 transitions. [2023-11-26 11:52:21,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 57 transitions. [2023-11-26 11:52:21,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:52:21,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 57 transitions. [2023-11-26 11:52:21,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 11:52:21,428 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 11:52:21,428 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 11:52:21,428 INFO L175 Difference]: Start difference. First operand has 92 places, 34 transitions, 252 flow. Second operand 6 states and 57 transitions. [2023-11-26 11:52:21,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 44 transitions, 357 flow [2023-11-26 11:52:21,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 44 transitions, 306 flow, removed 10 selfloop flow, removed 11 redundant places. [2023-11-26 11:52:21,431 INFO L231 Difference]: Finished difference. Result has 83 places, 0 transitions, 0 flow [2023-11-26 11:52:21,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=83, PETRI_TRANSITIONS=0} [2023-11-26 11:52:21,432 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 62 predicate places. [2023-11-26 11:52:21,432 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 0 transitions, 0 flow [2023-11-26 11:52:21,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 11:52:21,434 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-26 11:52:21,434 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-26 11:52:21,434 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-26 11:52:21,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:21,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:21,640 INFO L445 BasicCegarLoop]: Path program histogram: [36, 2, 2, 1] [2023-11-26 11:52:21,642 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-26 11:52:21,643 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 11:52:21,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 11:52:21 BasicIcfg [2023-11-26 11:52:21,647 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 11:52:21,648 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 11:52:21,648 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 11:52:21,648 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 11:52:21,649 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:51:35" (3/4) ... [2023-11-26 11:52:21,652 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-26 11:52:21,658 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-26 11:52:21,658 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-26 11:52:21,666 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 50 nodes and edges [2023-11-26 11:52:21,666 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-11-26 11:52:21,667 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-11-26 11:52:21,667 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-26 11:52:21,770 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 11:52:21,771 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/witness.yml [2023-11-26 11:52:21,771 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 11:52:21,772 INFO L158 Benchmark]: Toolchain (without parser) took 47354.74ms. Allocated memory was 197.1MB in the beginning and 757.1MB in the end (delta: 559.9MB). Free memory was 166.5MB in the beginning and 289.7MB in the end (delta: -123.2MB). Peak memory consumption was 436.0MB. Max. memory is 16.1GB. [2023-11-26 11:52:21,772 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 130.0MB. Free memory was 102.2MB in the beginning and 102.0MB in the end (delta: 132.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:52:21,773 INFO L158 Benchmark]: CACSL2BoogieTranslator took 285.45ms. Allocated memory is still 197.1MB. Free memory was 166.3MB in the beginning and 159.0MB in the end (delta: 7.3MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2023-11-26 11:52:21,773 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.28ms. Allocated memory is still 197.1MB. Free memory was 159.0MB in the beginning and 157.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 11:52:21,773 INFO L158 Benchmark]: Boogie Preprocessor took 86.96ms. Allocated memory is still 197.1MB. Free memory was 157.2MB in the beginning and 166.1MB in the end (delta: -8.9MB). Peak memory consumption was 2.6MB. Max. memory is 16.1GB. [2023-11-26 11:52:21,774 INFO L158 Benchmark]: RCFGBuilder took 587.38ms. Allocated memory is still 197.1MB. Free memory was 166.1MB in the beginning and 142.0MB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2023-11-26 11:52:21,775 INFO L158 Benchmark]: TraceAbstraction took 46223.36ms. Allocated memory was 197.1MB in the beginning and 757.1MB in the end (delta: 559.9MB). Free memory was 142.0MB in the beginning and 295.0MB in the end (delta: -153.0MB). Peak memory consumption was 408.0MB. Max. memory is 16.1GB. [2023-11-26 11:52:21,776 INFO L158 Benchmark]: Witness Printer took 123.53ms. Allocated memory is still 757.1MB. Free memory was 295.0MB in the beginning and 289.7MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-26 11:52:21,779 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 130.0MB. Free memory was 102.2MB in the beginning and 102.0MB in the end (delta: 132.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 285.45ms. Allocated memory is still 197.1MB. Free memory was 166.3MB in the beginning and 159.0MB in the end (delta: 7.3MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.28ms. Allocated memory is still 197.1MB. Free memory was 159.0MB in the beginning and 157.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 86.96ms. Allocated memory is still 197.1MB. Free memory was 157.2MB in the beginning and 166.1MB in the end (delta: -8.9MB). Peak memory consumption was 2.6MB. Max. memory is 16.1GB. * RCFGBuilder took 587.38ms. Allocated memory is still 197.1MB. Free memory was 166.1MB in the beginning and 142.0MB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 46223.36ms. Allocated memory was 197.1MB in the beginning and 757.1MB in the end (delta: 559.9MB). Free memory was 142.0MB in the beginning and 295.0MB in the end (delta: -153.0MB). Peak memory consumption was 408.0MB. Max. memory is 16.1GB. * Witness Printer took 123.53ms. Allocated memory is still 757.1MB. Free memory was 295.0MB in the beginning and 289.7MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 70]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 26 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 46.1s, OverallIterations: 41, TraceHistogramMax: 6, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.0s, AutomataDifference: 23.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2249 SdHoareTripleChecker+Valid, 5.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2249 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 4.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 428 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7167 IncrementalHoareTripleChecker+Invalid, 7595 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 428 mSolverCounterUnsat, 0 mSDtfsCounter, 7167 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1656 GetRequests, 1001 SyntacticMatches, 25 SemanticMatches, 630 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3390 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12946occurred in iteration=31, InterpolantAutomatonStates: 443, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 10.5s InterpolantComputationTime, 1469 NumberOfCodeBlocks, 1451 NumberOfCodeBlocksAsserted, 123 NumberOfCheckSat, 1939 ConstructedInterpolants, 0 QuantifiedInterpolants, 8373 SizeOfPredicates, 11 NumberOfNonLiveVariables, 4652 ConjunctsInSsa, 301 ConjunctsInUnsatCore, 109 InterpolantComputations, 11 PerfectInterpolantSequences, 496/1044 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-26 11:52:21,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd57df20-264e-483f-b480-08f7f3778960/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE