./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl --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 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:04:52,379 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:04:52,517 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:04:52,530 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:04:52,531 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:04:52,575 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:04:52,577 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:04:52,578 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:04:52,579 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:04:52,584 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:04:52,585 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:04:52,586 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:04:52,586 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:04:52,588 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:04:52,589 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:04:52,589 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:04:52,590 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:04:52,590 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:04:52,591 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:04:52,591 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:04:52,592 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:04:52,592 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:04:52,593 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:04:52,593 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:04:52,594 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:04:52,595 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:04:52,595 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:04:52,596 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:04:52,596 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:04:52,597 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:04:52,599 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:04:52,599 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:04:52,599 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:04:52,599 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:04:52,600 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:04:52,600 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:04:52,600 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:04:52,601 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:04:52,601 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:04:52,601 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_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 [2023-11-12 02:04:52,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:04:52,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:04:52,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:04:52,903 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:04:52,903 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:04:52,905 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-12 02:04:56,278 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:04:56,562 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:04:56,563 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-12 02:04:56,575 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/data/81f27d7cc/c7137c8b144c42b38f662264b17e0d28/FLAG77f6305b7 [2023-11-12 02:04:56,594 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/data/81f27d7cc/c7137c8b144c42b38f662264b17e0d28 [2023-11-12 02:04:56,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:04:56,599 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:04:56,601 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:04:56,602 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:04:56,609 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:04:56,610 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:04:56" (1/1) ... [2023-11-12 02:04:56,611 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6848f0f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:56, skipping insertion in model container [2023-11-12 02:04:56,612 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:04:56" (1/1) ... [2023-11-12 02:04:56,641 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:04:56,812 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_9349d4f4-d3e3-444d-998d-888e93585fbf/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2023-11-12 02:04:56,818 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:04:56,830 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:04:56,856 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_9349d4f4-d3e3-444d-998d-888e93585fbf/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2124,2137] [2023-11-12 02:04:56,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:04:56,867 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:04:56,868 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:04:56,877 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:04:56,877 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:56 WrapperNode [2023-11-12 02:04:56,878 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:04:56,879 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:04:56,879 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:04:56,879 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:04:56,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:56" (1/1) ... [2023-11-12 02:04:56,899 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:56" (1/1) ... [2023-11-12 02:04:56,922 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2023-11-12 02:04:56,923 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:04:56,924 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:04:56,924 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:04:56,924 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:04:56,936 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:56" (1/1) ... [2023-11-12 02:04:56,936 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:56" (1/1) ... [2023-11-12 02:04:56,939 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:56" (1/1) ... [2023-11-12 02:04:56,939 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:56" (1/1) ... [2023-11-12 02:04:56,946 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:56" (1/1) ... [2023-11-12 02:04:56,951 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:56" (1/1) ... [2023-11-12 02:04:56,953 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:56" (1/1) ... [2023-11-12 02:04:56,954 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:56" (1/1) ... [2023-11-12 02:04:56,957 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:04:56,963 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:04:56,964 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:04:56,965 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:04:56,968 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:56" (1/1) ... [2023-11-12 02:04:56,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:04:56,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:57,009 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:04:57,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:04:57,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:04:57,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:04:57,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:04:57,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:04:57,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:04:57,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:04:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:04:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:04:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:04:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:04:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:04:57,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:04:57,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:04:57,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:04:57,069 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:04:57,254 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:04:57,257 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:04:57,588 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:04:57,664 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:04:57,664 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:04:57,667 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:04:57 BoogieIcfgContainer [2023-11-12 02:04:57,668 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:04:57,671 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:04:57,672 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:04:57,676 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:04:57,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:04:56" (1/3) ... [2023-11-12 02:04:57,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@193e986d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:04:57, skipping insertion in model container [2023-11-12 02:04:57,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:56" (2/3) ... [2023-11-12 02:04:57,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@193e986d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:04:57, skipping insertion in model container [2023-11-12 02:04:57,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:04:57" (3/3) ... [2023-11-12 02:04:57,680 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-11-12 02:04:57,692 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:04:57,706 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:04:57,707 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:04:57,707 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:04:57,776 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:04:57,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 188 flow [2023-11-12 02:04:57,904 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-11-12 02:04:57,909 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:04:57,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-12 02:04:57,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 188 flow [2023-11-12 02:04:57,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2023-11-12 02:04:57,928 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:04:57,949 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 76 transitions, 164 flow [2023-11-12 02:04:57,952 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 76 transitions, 164 flow [2023-11-12 02:04:57,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 164 flow [2023-11-12 02:04:57,986 INFO L124 PetriNetUnfolderBase]: 6/76 cut-off events. [2023-11-12 02:04:57,987 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:04:57,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 76 events. 6/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-12 02:04:57,989 INFO L119 LiptonReduction]: Number of co-enabled transitions 504 [2023-11-12 02:05:01,033 INFO L134 LiptonReduction]: Checked pairs total: 528 [2023-11-12 02:05:01,033 INFO L136 LiptonReduction]: Total number of compositions: 72 [2023-11-12 02:05:01,057 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:05:01,067 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;@64cff6f1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:05:01,068 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:05:01,082 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:05:01,082 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-12 02:05:01,082 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:05:01,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:01,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:01,089 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:01,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:01,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1070695480, now seen corresponding path program 1 times [2023-11-12 02:05:01,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:01,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015444094] [2023-11-12 02:05:01,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:01,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:01,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:01,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015444094] [2023-11-12 02:05:01,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015444094] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:01,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:01,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:05:01,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616000736] [2023-11-12 02:05:01,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:01,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:05:01,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:01,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:05:01,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:05:01,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 159 [2023-11-12 02:05:01,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:01,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:01,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 159 [2023-11-12 02:05:01,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:01,787 INFO L124 PetriNetUnfolderBase]: 51/92 cut-off events. [2023-11-12 02:05:01,787 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-12 02:05:01,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 92 events. 51/92 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 181 event pairs, 24 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 150. Up to 73 conditions per place. [2023-11-12 02:05:01,794 INFO L140 encePairwiseOnDemand]: 155/159 looper letters, 19 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-11-12 02:05:01,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 103 flow [2023-11-12 02:05:01,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:05:01,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:05:01,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 311 transitions. [2023-11-12 02:05:01,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4889937106918239 [2023-11-12 02:05:01,831 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 311 transitions. [2023-11-12 02:05:01,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 311 transitions. [2023-11-12 02:05:01,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:01,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 311 transitions. [2023-11-12 02:05:01,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:01,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:01,856 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:01,859 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 311 transitions. [2023-11-12 02:05:01,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 103 flow [2023-11-12 02:05:01,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 93 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:05:01,865 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-11-12 02:05:01,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-11-12 02:05:01,876 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-11-12 02:05:01,877 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-11-12 02:05:01,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:01,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:01,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:01,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:05:01,879 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:01,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:01,880 INFO L85 PathProgramCache]: Analyzing trace with hash 21326808, now seen corresponding path program 1 times [2023-11-12 02:05:01,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:01,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919554697] [2023-11-12 02:05:01,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:01,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:05:02,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:02,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919554697] [2023-11-12 02:05:02,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919554697] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:02,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:02,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:05:02,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579729546] [2023-11-12 02:05:02,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:02,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:05:02,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:02,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:05:02,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:05:02,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 159 [2023-11-12 02:05:02,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:02,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:02,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 159 [2023-11-12 02:05:02,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:02,317 INFO L124 PetriNetUnfolderBase]: 65/116 cut-off events. [2023-11-12 02:05:02,317 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-12 02:05:02,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 116 events. 65/116 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 263 event pairs, 33 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 70. Up to 92 conditions per place. [2023-11-12 02:05:02,322 INFO L140 encePairwiseOnDemand]: 155/159 looper letters, 21 selfloop transitions, 3 changer transitions 0/24 dead transitions. [2023-11-12 02:05:02,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 24 transitions, 123 flow [2023-11-12 02:05:02,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:05:02,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:05:02,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 303 transitions. [2023-11-12 02:05:02,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47641509433962265 [2023-11-12 02:05:02,327 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 303 transitions. [2023-11-12 02:05:02,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 303 transitions. [2023-11-12 02:05:02,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:02,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 303 transitions. [2023-11-12 02:05:02,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:02,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:02,341 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 159.0) internal successors, (795), 5 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:02,342 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 303 transitions. [2023-11-12 02:05:02,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 24 transitions, 123 flow [2023-11-12 02:05:02,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 24 transitions, 113 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-12 02:05:02,344 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 56 flow [2023-11-12 02:05:02,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-11-12 02:05:02,347 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-11-12 02:05:02,347 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 56 flow [2023-11-12 02:05:02,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:02,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:02,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:02,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:05:02,356 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:02,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:02,357 INFO L85 PathProgramCache]: Analyzing trace with hash -478343755, now seen corresponding path program 1 times [2023-11-12 02:05:02,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:02,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964157557] [2023-11-12 02:05:02,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:02,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:02,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:02,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964157557] [2023-11-12 02:05:02,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964157557] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:02,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884644072] [2023-11-12 02:05:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:02,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:02,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:02,985 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:03,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:05:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:03,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:05:03,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:03,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:04,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884644072] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:04,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:04,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-12 02:05:04,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112982562] [2023-11-12 02:05:04,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:04,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:05:04,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:04,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:05:04,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:05:04,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 159 [2023-11-12 02:05:04,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 56 flow. Second operand has 21 states, 21 states have (on average 64.85714285714286) internal successors, (1362), 21 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:04,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:04,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 159 [2023-11-12 02:05:04,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:05,510 INFO L124 PetriNetUnfolderBase]: 167/324 cut-off events. [2023-11-12 02:05:05,511 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-11-12 02:05:05,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 855 conditions, 324 events. 167/324 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1253 event pairs, 20 based on Foata normal form. 2/252 useless extension candidates. Maximal degree in co-relation 306. Up to 107 conditions per place. [2023-11-12 02:05:05,516 INFO L140 encePairwiseOnDemand]: 151/159 looper letters, 66 selfloop transitions, 30 changer transitions 29/125 dead transitions. [2023-11-12 02:05:05,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 125 transitions, 625 flow [2023-11-12 02:05:05,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-12 02:05:05,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-12 02:05:05,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1445 transitions. [2023-11-12 02:05:05,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432764300688829 [2023-11-12 02:05:05,524 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1445 transitions. [2023-11-12 02:05:05,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1445 transitions. [2023-11-12 02:05:05,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:05,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1445 transitions. [2023-11-12 02:05:05,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 68.80952380952381) internal successors, (1445), 21 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:05,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 159.0) internal successors, (3498), 22 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:05,544 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 159.0) internal successors, (3498), 22 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:05,544 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 56 flow. Second operand 21 states and 1445 transitions. [2023-11-12 02:05:05,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 125 transitions, 625 flow [2023-11-12 02:05:05,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 125 transitions, 611 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-12 02:05:05,550 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 281 flow [2023-11-12 02:05:05,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=281, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-11-12 02:05:05,551 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-11-12 02:05:05,552 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 281 flow [2023-11-12 02:05:05,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.85714285714286) internal successors, (1362), 21 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:05,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:05,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:05,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:05,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:05,761 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:05,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:05,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1703775193, now seen corresponding path program 2 times [2023-11-12 02:05:05,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:05,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96704501] [2023-11-12 02:05:05,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:05,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:06,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:06,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96704501] [2023-11-12 02:05:06,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96704501] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:06,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882866713] [2023-11-12 02:05:06,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:05:06,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:06,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:06,114 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:06,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:05:06,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:05:06,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:05:06,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:05:06,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:06,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:07,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882866713] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:07,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:07,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-12 02:05:07,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096193060] [2023-11-12 02:05:07,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:07,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:05:07,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:07,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:05:07,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:05:07,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 159 [2023-11-12 02:05:07,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 281 flow. Second operand has 21 states, 21 states have (on average 64.80952380952381) internal successors, (1361), 21 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:07,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:07,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 159 [2023-11-12 02:05:07,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:08,402 INFO L124 PetriNetUnfolderBase]: 164/338 cut-off events. [2023-11-12 02:05:08,402 INFO L125 PetriNetUnfolderBase]: For 786/786 co-relation queries the response was YES. [2023-11-12 02:05:08,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1327 conditions, 338 events. 164/338 cut-off events. For 786/786 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1408 event pairs, 22 based on Foata normal form. 2/314 useless extension candidates. Maximal degree in co-relation 1284. Up to 119 conditions per place. [2023-11-12 02:05:08,410 INFO L140 encePairwiseOnDemand]: 151/159 looper letters, 62 selfloop transitions, 33 changer transitions 20/115 dead transitions. [2023-11-12 02:05:08,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 115 transitions, 793 flow [2023-11-12 02:05:08,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 02:05:08,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-12 02:05:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1307 transitions. [2023-11-12 02:05:08,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43263819927176433 [2023-11-12 02:05:08,423 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1307 transitions. [2023-11-12 02:05:08,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1307 transitions. [2023-11-12 02:05:08,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:08,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1307 transitions. [2023-11-12 02:05:08,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 68.78947368421052) internal successors, (1307), 19 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:08,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 159.0) internal successors, (3180), 20 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:08,438 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 159.0) internal successors, (3180), 20 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:08,439 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 281 flow. Second operand 19 states and 1307 transitions. [2023-11-12 02:05:08,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 115 transitions, 793 flow [2023-11-12 02:05:08,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 115 transitions, 699 flow, removed 41 selfloop flow, removed 5 redundant places. [2023-11-12 02:05:08,456 INFO L231 Difference]: Finished difference. Result has 65 places, 50 transitions, 340 flow [2023-11-12 02:05:08,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=340, PETRI_PLACES=65, PETRI_TRANSITIONS=50} [2023-11-12 02:05:08,459 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 45 predicate places. [2023-11-12 02:05:08,459 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 50 transitions, 340 flow [2023-11-12 02:05:08,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.80952380952381) internal successors, (1361), 21 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:08,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:08,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:08,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:08,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:08,668 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:08,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:08,669 INFO L85 PathProgramCache]: Analyzing trace with hash 42893417, now seen corresponding path program 3 times [2023-11-12 02:05:08,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:08,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96715142] [2023-11-12 02:05:08,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:08,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:09,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:09,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96715142] [2023-11-12 02:05:09,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96715142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:09,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080564807] [2023-11-12 02:05:09,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:05:09,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:09,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:09,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:09,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:05:09,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:05:09,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:05:09,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:05:09,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:09,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:09,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080564807] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:09,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:09,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-12 02:05:09,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817261550] [2023-11-12 02:05:09,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:09,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:05:09,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:09,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:05:09,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:05:10,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 159 [2023-11-12 02:05:10,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 50 transitions, 340 flow. Second operand has 21 states, 21 states have (on average 64.71428571428571) internal successors, (1359), 21 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:10,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:10,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 159 [2023-11-12 02:05:10,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:11,050 INFO L124 PetriNetUnfolderBase]: 167/340 cut-off events. [2023-11-12 02:05:11,050 INFO L125 PetriNetUnfolderBase]: For 785/785 co-relation queries the response was YES. [2023-11-12 02:05:11,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1412 conditions, 340 events. 167/340 cut-off events. For 785/785 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1390 event pairs, 20 based on Foata normal form. 1/341 useless extension candidates. Maximal degree in co-relation 1359. Up to 135 conditions per place. [2023-11-12 02:05:11,055 INFO L140 encePairwiseOnDemand]: 151/159 looper letters, 64 selfloop transitions, 38 changer transitions 16/118 dead transitions. [2023-11-12 02:05:11,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 118 transitions, 884 flow [2023-11-12 02:05:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:05:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-12 02:05:11,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1237 transitions. [2023-11-12 02:05:11,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43221523410202656 [2023-11-12 02:05:11,062 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1237 transitions. [2023-11-12 02:05:11,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1237 transitions. [2023-11-12 02:05:11,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:11,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1237 transitions. [2023-11-12 02:05:11,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 68.72222222222223) internal successors, (1237), 18 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:11,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 159.0) internal successors, (3021), 19 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:11,078 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 159.0) internal successors, (3021), 19 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:11,078 INFO L175 Difference]: Start difference. First operand has 65 places, 50 transitions, 340 flow. Second operand 18 states and 1237 transitions. [2023-11-12 02:05:11,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 118 transitions, 884 flow [2023-11-12 02:05:11,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 118 transitions, 760 flow, removed 22 selfloop flow, removed 15 redundant places. [2023-11-12 02:05:11,090 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 405 flow [2023-11-12 02:05:11,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=405, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-11-12 02:05:11,091 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 46 predicate places. [2023-11-12 02:05:11,091 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 405 flow [2023-11-12 02:05:11,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.71428571428571) internal successors, (1359), 21 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:11,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:11,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:11,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:11,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:11,300 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:11,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:11,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1241265869, now seen corresponding path program 4 times [2023-11-12 02:05:11,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:11,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708244617] [2023-11-12 02:05:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:11,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:11,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:11,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708244617] [2023-11-12 02:05:11,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708244617] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:11,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642252488] [2023-11-12 02:05:11,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:05:11,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:11,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:11,421 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:11,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:05:11,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:05:11,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:05:11,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:05:11,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:11,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:11,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642252488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:11,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:11,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-11-12 02:05:11,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126832683] [2023-11-12 02:05:11,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:11,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:05:11,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:11,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:05:11,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:05:11,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 159 [2023-11-12 02:05:11,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 405 flow. Second operand has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:11,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:11,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 159 [2023-11-12 02:05:11,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:11,733 INFO L124 PetriNetUnfolderBase]: 160/306 cut-off events. [2023-11-12 02:05:11,733 INFO L125 PetriNetUnfolderBase]: For 824/824 co-relation queries the response was YES. [2023-11-12 02:05:11,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1257 conditions, 306 events. 160/306 cut-off events. For 824/824 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1103 event pairs, 25 based on Foata normal form. 18/324 useless extension candidates. Maximal degree in co-relation 1224. Up to 229 conditions per place. [2023-11-12 02:05:11,737 INFO L140 encePairwiseOnDemand]: 154/159 looper letters, 51 selfloop transitions, 12 changer transitions 1/64 dead transitions. [2023-11-12 02:05:11,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 64 transitions, 546 flow [2023-11-12 02:05:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:05:11,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:05:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 382 transitions. [2023-11-12 02:05:11,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48050314465408805 [2023-11-12 02:05:11,741 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 382 transitions. [2023-11-12 02:05:11,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 382 transitions. [2023-11-12 02:05:11,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:11,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 382 transitions. [2023-11-12 02:05:11,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.4) internal successors, (382), 5 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:11,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:11,746 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 159.0) internal successors, (954), 6 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:11,747 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 405 flow. Second operand 5 states and 382 transitions. [2023-11-12 02:05:11,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 64 transitions, 546 flow [2023-11-12 02:05:11,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 495 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-11-12 02:05:11,755 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 364 flow [2023-11-12 02:05:11,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=364, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2023-11-12 02:05:11,758 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-11-12 02:05:11,758 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 364 flow [2023-11-12 02:05:11,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.57142857142857) internal successors, (515), 7 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:11,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:11,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:11,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:11,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:05:11,966 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:11,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1303416043, now seen corresponding path program 5 times [2023-11-12 02:05:11,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:11,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368558551] [2023-11-12 02:05:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:11,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:12,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:12,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368558551] [2023-11-12 02:05:12,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368558551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:12,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357737354] [2023-11-12 02:05:12,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:05:12,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:12,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:12,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:12,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:05:12,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:05:12,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:05:12,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:05:12,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:12,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:13,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357737354] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:13,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:13,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-11-12 02:05:13,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626743373] [2023-11-12 02:05:13,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:13,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 02:05:13,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:13,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 02:05:13,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:05:13,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 159 [2023-11-12 02:05:13,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 364 flow. Second operand has 22 states, 22 states have (on average 64.86363636363636) internal successors, (1427), 22 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:13,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:13,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 159 [2023-11-12 02:05:13,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:14,180 INFO L124 PetriNetUnfolderBase]: 225/453 cut-off events. [2023-11-12 02:05:14,181 INFO L125 PetriNetUnfolderBase]: For 1293/1293 co-relation queries the response was YES. [2023-11-12 02:05:14,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1917 conditions, 453 events. 225/453 cut-off events. For 1293/1293 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2020 event pairs, 14 based on Foata normal form. 1/454 useless extension candidates. Maximal degree in co-relation 1712. Up to 225 conditions per place. [2023-11-12 02:05:14,187 INFO L140 encePairwiseOnDemand]: 151/159 looper letters, 86 selfloop transitions, 37 changer transitions 8/131 dead transitions. [2023-11-12 02:05:14,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 131 transitions, 1044 flow [2023-11-12 02:05:14,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:05:14,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-12 02:05:14,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1159 transitions. [2023-11-12 02:05:14,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42878283388827226 [2023-11-12 02:05:14,193 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1159 transitions. [2023-11-12 02:05:14,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1159 transitions. [2023-11-12 02:05:14,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:14,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1159 transitions. [2023-11-12 02:05:14,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 68.17647058823529) internal successors, (1159), 17 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:14,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 159.0) internal successors, (2862), 18 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:14,208 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 159.0) internal successors, (2862), 18 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:14,209 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 364 flow. Second operand 17 states and 1159 transitions. [2023-11-12 02:05:14,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 131 transitions, 1044 flow [2023-11-12 02:05:14,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 131 transitions, 1006 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-11-12 02:05:14,221 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 631 flow [2023-11-12 02:05:14,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=631, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2023-11-12 02:05:14,222 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 56 predicate places. [2023-11-12 02:05:14,222 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 631 flow [2023-11-12 02:05:14,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.86363636363636) internal successors, (1427), 22 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:14,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:14,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:14,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:14,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:14,431 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:14,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:14,431 INFO L85 PathProgramCache]: Analyzing trace with hash -675217571, now seen corresponding path program 6 times [2023-11-12 02:05:14,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:14,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725627952] [2023-11-12 02:05:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:14,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:14,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:14,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725627952] [2023-11-12 02:05:14,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725627952] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:14,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882689822] [2023-11-12 02:05:14,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:05:14,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:14,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:14,779 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:14,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:05:14,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-12 02:05:14,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:05:14,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:05:14,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:15,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:15,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882689822] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:15,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:15,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-12 02:05:15,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310511274] [2023-11-12 02:05:15,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:15,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:05:15,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:15,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:05:15,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:05:15,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 159 [2023-11-12 02:05:15,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 631 flow. Second operand has 21 states, 21 states have (on average 64.80952380952381) internal successors, (1361), 21 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:15,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:15,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 159 [2023-11-12 02:05:15,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:16,514 INFO L124 PetriNetUnfolderBase]: 223/448 cut-off events. [2023-11-12 02:05:16,514 INFO L125 PetriNetUnfolderBase]: For 1485/1485 co-relation queries the response was YES. [2023-11-12 02:05:16,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2042 conditions, 448 events. 223/448 cut-off events. For 1485/1485 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1971 event pairs, 26 based on Foata normal form. 1/449 useless extension candidates. Maximal degree in co-relation 1987. Up to 309 conditions per place. [2023-11-12 02:05:16,521 INFO L140 encePairwiseOnDemand]: 151/159 looper letters, 85 selfloop transitions, 24 changer transitions 11/120 dead transitions. [2023-11-12 02:05:16,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 120 transitions, 1069 flow [2023-11-12 02:05:16,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:05:16,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-12 02:05:16,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1152 transitions. [2023-11-12 02:05:16,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261931187569367 [2023-11-12 02:05:16,528 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1152 transitions. [2023-11-12 02:05:16,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1152 transitions. [2023-11-12 02:05:16,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:16,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1152 transitions. [2023-11-12 02:05:16,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.76470588235294) internal successors, (1152), 17 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:16,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 159.0) internal successors, (2862), 18 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:16,542 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 159.0) internal successors, (2862), 18 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:16,542 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 631 flow. Second operand 17 states and 1152 transitions. [2023-11-12 02:05:16,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 120 transitions, 1069 flow [2023-11-12 02:05:16,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 120 transitions, 1002 flow, removed 24 selfloop flow, removed 6 redundant places. [2023-11-12 02:05:16,557 INFO L231 Difference]: Finished difference. Result has 88 places, 73 transitions, 626 flow [2023-11-12 02:05:16,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=626, PETRI_PLACES=88, PETRI_TRANSITIONS=73} [2023-11-12 02:05:16,559 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 68 predicate places. [2023-11-12 02:05:16,559 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 73 transitions, 626 flow [2023-11-12 02:05:16,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.80952380952381) internal successors, (1361), 21 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:16,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:16,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:16,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:16,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:16,768 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:16,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:16,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1062496155, now seen corresponding path program 7 times [2023-11-12 02:05:16,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:16,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617282268] [2023-11-12 02:05:16,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:16,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:17,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:17,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617282268] [2023-11-12 02:05:17,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617282268] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:17,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748897552] [2023-11-12 02:05:17,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:05:17,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:17,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:17,099 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:17,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:05:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:17,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:05:17,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:17,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:17,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748897552] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:17,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:17,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-12 02:05:17,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131490997] [2023-11-12 02:05:17,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:17,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:05:17,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:17,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:05:17,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:05:18,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 159 [2023-11-12 02:05:18,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 73 transitions, 626 flow. Second operand has 21 states, 21 states have (on average 64.80952380952381) internal successors, (1361), 21 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:18,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:18,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 159 [2023-11-12 02:05:18,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:18,805 INFO L124 PetriNetUnfolderBase]: 212/423 cut-off events. [2023-11-12 02:05:18,805 INFO L125 PetriNetUnfolderBase]: For 1184/1184 co-relation queries the response was YES. [2023-11-12 02:05:18,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1909 conditions, 423 events. 212/423 cut-off events. For 1184/1184 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1794 event pairs, 24 based on Foata normal form. 1/424 useless extension candidates. Maximal degree in co-relation 1857. Up to 309 conditions per place. [2023-11-12 02:05:18,810 INFO L140 encePairwiseOnDemand]: 151/159 looper letters, 74 selfloop transitions, 21 changer transitions 14/109 dead transitions. [2023-11-12 02:05:18,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 109 transitions, 972 flow [2023-11-12 02:05:18,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:05:18,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-12 02:05:18,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1016 transitions. [2023-11-12 02:05:18,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4259958071278826 [2023-11-12 02:05:18,814 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1016 transitions. [2023-11-12 02:05:18,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1016 transitions. [2023-11-12 02:05:18,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:18,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1016 transitions. [2023-11-12 02:05:18,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 67.73333333333333) internal successors, (1016), 15 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:18,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 159.0) internal successors, (2544), 16 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:18,825 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 159.0) internal successors, (2544), 16 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:18,825 INFO L175 Difference]: Start difference. First operand has 88 places, 73 transitions, 626 flow. Second operand 15 states and 1016 transitions. [2023-11-12 02:05:18,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 109 transitions, 972 flow [2023-11-12 02:05:18,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 109 transitions, 935 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-11-12 02:05:18,835 INFO L231 Difference]: Finished difference. Result has 90 places, 69 transitions, 590 flow [2023-11-12 02:05:18,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=590, PETRI_PLACES=90, PETRI_TRANSITIONS=69} [2023-11-12 02:05:18,837 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 70 predicate places. [2023-11-12 02:05:18,837 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 69 transitions, 590 flow [2023-11-12 02:05:18,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.80952380952381) internal successors, (1361), 21 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:18,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:18,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:18,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:19,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:19,045 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:19,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:19,046 INFO L85 PathProgramCache]: Analyzing trace with hash 536119409, now seen corresponding path program 8 times [2023-11-12 02:05:19,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:19,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945666239] [2023-11-12 02:05:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:19,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:19,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:19,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945666239] [2023-11-12 02:05:19,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945666239] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:19,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549415271] [2023-11-12 02:05:19,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:05:19,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:19,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:19,403 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:19,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:05:19,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:05:19,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:05:19,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:05:19,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:19,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:20,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549415271] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:20,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:20,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-12 02:05:20,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36138618] [2023-11-12 02:05:20,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:20,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:05:20,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:20,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:05:20,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:05:20,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 159 [2023-11-12 02:05:20,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 69 transitions, 590 flow. Second operand has 21 states, 21 states have (on average 64.76190476190476) internal successors, (1360), 21 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:20,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:20,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 159 [2023-11-12 02:05:20,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:21,046 INFO L124 PetriNetUnfolderBase]: 220/440 cut-off events. [2023-11-12 02:05:21,046 INFO L125 PetriNetUnfolderBase]: For 1208/1208 co-relation queries the response was YES. [2023-11-12 02:05:21,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1953 conditions, 440 events. 220/440 cut-off events. For 1208/1208 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1882 event pairs, 14 based on Foata normal form. 2/442 useless extension candidates. Maximal degree in co-relation 1901. Up to 278 conditions per place. [2023-11-12 02:05:21,051 INFO L140 encePairwiseOnDemand]: 150/159 looper letters, 75 selfloop transitions, 28 changer transitions 20/123 dead transitions. [2023-11-12 02:05:21,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 123 transitions, 1094 flow [2023-11-12 02:05:21,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:05:21,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:05:21,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 961 transitions. [2023-11-12 02:05:21,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43171608265947886 [2023-11-12 02:05:21,055 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 961 transitions. [2023-11-12 02:05:21,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 961 transitions. [2023-11-12 02:05:21,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:21,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 961 transitions. [2023-11-12 02:05:21,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 68.64285714285714) internal successors, (961), 14 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:21,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 159.0) internal successors, (2385), 15 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:21,066 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 159.0) internal successors, (2385), 15 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:21,066 INFO L175 Difference]: Start difference. First operand has 90 places, 69 transitions, 590 flow. Second operand 14 states and 961 transitions. [2023-11-12 02:05:21,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 123 transitions, 1094 flow [2023-11-12 02:05:21,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 123 transitions, 1034 flow, removed 5 selfloop flow, removed 14 redundant places. [2023-11-12 02:05:21,077 INFO L231 Difference]: Finished difference. Result has 91 places, 74 transitions, 673 flow [2023-11-12 02:05:21,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=673, PETRI_PLACES=91, PETRI_TRANSITIONS=74} [2023-11-12 02:05:21,079 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 71 predicate places. [2023-11-12 02:05:21,079 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 74 transitions, 673 flow [2023-11-12 02:05:21,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.76190476190476) internal successors, (1360), 21 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:21,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:21,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:21,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:21,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:05:21,290 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:21,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:21,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1130989647, now seen corresponding path program 9 times [2023-11-12 02:05:21,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:21,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024349032] [2023-11-12 02:05:21,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:21,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:21,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:21,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024349032] [2023-11-12 02:05:21,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024349032] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:21,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779778967] [2023-11-12 02:05:21,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:05:21,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:21,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:21,592 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:21,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:05:21,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:05:21,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:05:21,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:05:21,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:21,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:22,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779778967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:22,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:22,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-12 02:05:22,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098121349] [2023-11-12 02:05:22,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:22,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:05:22,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:22,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:05:22,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:05:22,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 159 [2023-11-12 02:05:22,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 74 transitions, 673 flow. Second operand has 21 states, 21 states have (on average 64.71428571428571) internal successors, (1359), 21 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:22,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:22,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 159 [2023-11-12 02:05:22,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:23,139 INFO L124 PetriNetUnfolderBase]: 192/374 cut-off events. [2023-11-12 02:05:23,140 INFO L125 PetriNetUnfolderBase]: For 1153/1153 co-relation queries the response was YES. [2023-11-12 02:05:23,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1788 conditions, 374 events. 192/374 cut-off events. For 1153/1153 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1447 event pairs, 12 based on Foata normal form. 1/375 useless extension candidates. Maximal degree in co-relation 1728. Up to 279 conditions per place. [2023-11-12 02:05:23,145 INFO L140 encePairwiseOnDemand]: 151/159 looper letters, 69 selfloop transitions, 25 changer transitions 9/103 dead transitions. [2023-11-12 02:05:23,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 103 transitions, 1022 flow [2023-11-12 02:05:23,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:05:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-12 02:05:23,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 877 transitions. [2023-11-12 02:05:23,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4242864054184809 [2023-11-12 02:05:23,149 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 877 transitions. [2023-11-12 02:05:23,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 877 transitions. [2023-11-12 02:05:23,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:23,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 877 transitions. [2023-11-12 02:05:23,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 67.46153846153847) internal successors, (877), 13 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:23,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 159.0) internal successors, (2226), 14 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:23,157 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 159.0) internal successors, (2226), 14 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:23,157 INFO L175 Difference]: Start difference. First operand has 91 places, 74 transitions, 673 flow. Second operand 13 states and 877 transitions. [2023-11-12 02:05:23,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 103 transitions, 1022 flow [2023-11-12 02:05:23,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 103 transitions, 899 flow, removed 36 selfloop flow, removed 14 redundant places. [2023-11-12 02:05:23,169 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 640 flow [2023-11-12 02:05:23,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=640, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2023-11-12 02:05:23,170 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 66 predicate places. [2023-11-12 02:05:23,171 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 640 flow [2023-11-12 02:05:23,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.71428571428571) internal successors, (1359), 21 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:23,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:23,172 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:23,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:23,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:05:23,379 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:23,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:23,379 INFO L85 PathProgramCache]: Analyzing trace with hash -609311174, now seen corresponding path program 10 times [2023-11-12 02:05:23,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:23,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292312559] [2023-11-12 02:05:23,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:23,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:23,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:23,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:23,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292312559] [2023-11-12 02:05:23,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292312559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:23,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479443927] [2023-11-12 02:05:23,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:05:23,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:23,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:23,766 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:23,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:05:23,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:05:23,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:05:23,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:05:23,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:24,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:24,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479443927] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:24,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:24,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-12 02:05:24,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199642579] [2023-11-12 02:05:24,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:24,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:05:24,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:24,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:05:24,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:05:24,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 159 [2023-11-12 02:05:24,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 74 transitions, 640 flow. Second operand has 25 states, 25 states have (on average 64.8) internal successors, (1620), 25 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:24,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:24,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 159 [2023-11-12 02:05:24,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:26,850 INFO L124 PetriNetUnfolderBase]: 276/550 cut-off events. [2023-11-12 02:05:26,850 INFO L125 PetriNetUnfolderBase]: For 1567/1567 co-relation queries the response was YES. [2023-11-12 02:05:26,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2467 conditions, 550 events. 276/550 cut-off events. For 1567/1567 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2540 event pairs, 14 based on Foata normal form. 3/553 useless extension candidates. Maximal degree in co-relation 2415. Up to 187 conditions per place. [2023-11-12 02:05:26,858 INFO L140 encePairwiseOnDemand]: 151/159 looper letters, 100 selfloop transitions, 84 changer transitions 20/204 dead transitions. [2023-11-12 02:05:26,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 204 transitions, 1686 flow [2023-11-12 02:05:26,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-12 02:05:26,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-12 02:05:26,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2052 transitions. [2023-11-12 02:05:26,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43018867924528303 [2023-11-12 02:05:26,864 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2052 transitions. [2023-11-12 02:05:26,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2052 transitions. [2023-11-12 02:05:26,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:26,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2052 transitions. [2023-11-12 02:05:26,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 68.4) internal successors, (2052), 30 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:26,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 159.0) internal successors, (4929), 31 states have internal predecessors, (4929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:26,882 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 159.0) internal successors, (4929), 31 states have internal predecessors, (4929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:26,882 INFO L175 Difference]: Start difference. First operand has 86 places, 74 transitions, 640 flow. Second operand 30 states and 2052 transitions. [2023-11-12 02:05:26,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 204 transitions, 1686 flow [2023-11-12 02:05:26,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 204 transitions, 1578 flow, removed 18 selfloop flow, removed 12 redundant places. [2023-11-12 02:05:26,897 INFO L231 Difference]: Finished difference. Result has 108 places, 109 transitions, 1048 flow [2023-11-12 02:05:26,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1048, PETRI_PLACES=108, PETRI_TRANSITIONS=109} [2023-11-12 02:05:26,898 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2023-11-12 02:05:26,899 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 109 transitions, 1048 flow [2023-11-12 02:05:26,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 64.8) internal successors, (1620), 25 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:26,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:26,900 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:26,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:27,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:05:27,106 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:27,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:27,107 INFO L85 PathProgramCache]: Analyzing trace with hash -421902590, now seen corresponding path program 11 times [2023-11-12 02:05:27,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:27,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625496450] [2023-11-12 02:05:27,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:27,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:27,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:27,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625496450] [2023-11-12 02:05:27,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625496450] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:27,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130749259] [2023-11-12 02:05:27,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:05:27,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:27,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:27,406 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:27,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:05:27,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:05:27,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:05:27,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:05:27,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:27,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:28,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130749259] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:28,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:28,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-12 02:05:28,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159285551] [2023-11-12 02:05:28,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:28,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:05:28,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:28,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:05:28,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:05:28,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 159 [2023-11-12 02:05:28,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 109 transitions, 1048 flow. Second operand has 25 states, 25 states have (on average 64.76) internal successors, (1619), 25 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:28,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:28,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 159 [2023-11-12 02:05:28,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:30,630 INFO L124 PetriNetUnfolderBase]: 368/761 cut-off events. [2023-11-12 02:05:30,630 INFO L125 PetriNetUnfolderBase]: For 3688/3688 co-relation queries the response was YES. [2023-11-12 02:05:30,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3920 conditions, 761 events. 368/761 cut-off events. For 3688/3688 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4065 event pairs, 20 based on Foata normal form. 4/765 useless extension candidates. Maximal degree in co-relation 3838. Up to 269 conditions per place. [2023-11-12 02:05:30,641 INFO L140 encePairwiseOnDemand]: 151/159 looper letters, 122 selfloop transitions, 106 changer transitions 27/255 dead transitions. [2023-11-12 02:05:30,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 255 transitions, 2412 flow [2023-11-12 02:05:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-12 02:05:30,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-12 02:05:30,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2465 transitions. [2023-11-12 02:05:30,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306429070580014 [2023-11-12 02:05:30,660 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2465 transitions. [2023-11-12 02:05:30,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2465 transitions. [2023-11-12 02:05:30,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:30,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2465 transitions. [2023-11-12 02:05:30,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 68.47222222222223) internal successors, (2465), 36 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:30,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 159.0) internal successors, (5883), 37 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:30,683 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 159.0) internal successors, (5883), 37 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:30,683 INFO L175 Difference]: Start difference. First operand has 108 places, 109 transitions, 1048 flow. Second operand 36 states and 2465 transitions. [2023-11-12 02:05:30,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 255 transitions, 2412 flow [2023-11-12 02:05:30,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 255 transitions, 1928 flow, removed 200 selfloop flow, removed 13 redundant places. [2023-11-12 02:05:30,716 INFO L231 Difference]: Finished difference. Result has 139 places, 136 transitions, 1247 flow [2023-11-12 02:05:30,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1247, PETRI_PLACES=139, PETRI_TRANSITIONS=136} [2023-11-12 02:05:30,717 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 119 predicate places. [2023-11-12 02:05:30,717 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 136 transitions, 1247 flow [2023-11-12 02:05:30,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 64.76) internal successors, (1619), 25 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:30,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:30,718 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:30,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:30,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:05:30,924 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:30,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:30,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1266684816, now seen corresponding path program 12 times [2023-11-12 02:05:30,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:30,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78984858] [2023-11-12 02:05:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:30,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:31,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:31,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78984858] [2023-11-12 02:05:31,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78984858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:31,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548995373] [2023-11-12 02:05:31,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:05:31,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:31,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:31,208 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:31,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:05:31,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-12 02:05:31,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:05:31,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:05:31,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:31,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:32,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548995373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:32,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:32,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-12 02:05:32,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39444417] [2023-11-12 02:05:32,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:32,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:05:32,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:32,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:05:32,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:05:32,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 159 [2023-11-12 02:05:32,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 136 transitions, 1247 flow. Second operand has 25 states, 25 states have (on average 64.84) internal successors, (1621), 25 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:32,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:32,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 159 [2023-11-12 02:05:32,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:34,114 INFO L124 PetriNetUnfolderBase]: 370/771 cut-off events. [2023-11-12 02:05:34,115 INFO L125 PetriNetUnfolderBase]: For 5625/5625 co-relation queries the response was YES. [2023-11-12 02:05:34,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3986 conditions, 771 events. 370/771 cut-off events. For 5625/5625 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4141 event pairs, 30 based on Foata normal form. 3/774 useless extension candidates. Maximal degree in co-relation 3884. Up to 348 conditions per place. [2023-11-12 02:05:34,125 INFO L140 encePairwiseOnDemand]: 151/159 looper letters, 113 selfloop transitions, 89 changer transitions 20/222 dead transitions. [2023-11-12 02:05:34,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 222 transitions, 2079 flow [2023-11-12 02:05:34,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-12 02:05:34,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-12 02:05:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1979 transitions. [2023-11-12 02:05:34,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.429191064844936 [2023-11-12 02:05:34,130 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1979 transitions. [2023-11-12 02:05:34,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1979 transitions. [2023-11-12 02:05:34,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:34,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1979 transitions. [2023-11-12 02:05:34,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 68.24137931034483) internal successors, (1979), 29 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:34,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 159.0) internal successors, (4770), 30 states have internal predecessors, (4770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:34,144 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 159.0) internal successors, (4770), 30 states have internal predecessors, (4770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:34,144 INFO L175 Difference]: Start difference. First operand has 139 places, 136 transitions, 1247 flow. Second operand 29 states and 1979 transitions. [2023-11-12 02:05:34,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 222 transitions, 2079 flow [2023-11-12 02:05:34,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 222 transitions, 1926 flow, removed 47 selfloop flow, removed 15 redundant places. [2023-11-12 02:05:34,174 INFO L231 Difference]: Finished difference. Result has 156 places, 137 transitions, 1346 flow [2023-11-12 02:05:34,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1346, PETRI_PLACES=156, PETRI_TRANSITIONS=137} [2023-11-12 02:05:34,175 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 136 predicate places. [2023-11-12 02:05:34,175 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 137 transitions, 1346 flow [2023-11-12 02:05:34,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 64.84) internal successors, (1621), 25 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:34,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:34,176 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:34,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-12 02:05:34,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:34,382 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:34,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:34,383 INFO L85 PathProgramCache]: Analyzing trace with hash -394196960, now seen corresponding path program 13 times [2023-11-12 02:05:34,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:34,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52947745] [2023-11-12 02:05:34,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:34,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:34,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:34,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52947745] [2023-11-12 02:05:34,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52947745] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:34,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086151770] [2023-11-12 02:05:34,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:05:34,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:34,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:34,649 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:34,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:05:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:34,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:05:34,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:34,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:35,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086151770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:35,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:35,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-12 02:05:35,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042771593] [2023-11-12 02:05:35,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:35,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:05:35,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:35,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:05:35,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:05:35,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 159 [2023-11-12 02:05:35,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 137 transitions, 1346 flow. Second operand has 25 states, 25 states have (on average 64.76) internal successors, (1619), 25 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:35,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:35,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 159 [2023-11-12 02:05:35,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:37,086 INFO L124 PetriNetUnfolderBase]: 353/738 cut-off events. [2023-11-12 02:05:37,086 INFO L125 PetriNetUnfolderBase]: For 6192/6192 co-relation queries the response was YES. [2023-11-12 02:05:37,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3992 conditions, 738 events. 353/738 cut-off events. For 6192/6192 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3939 event pairs, 22 based on Foata normal form. 2/740 useless extension candidates. Maximal degree in co-relation 3879. Up to 325 conditions per place. [2023-11-12 02:05:37,098 INFO L140 encePairwiseOnDemand]: 151/159 looper letters, 107 selfloop transitions, 100 changer transitions 21/228 dead transitions. [2023-11-12 02:05:37,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 228 transitions, 2183 flow [2023-11-12 02:05:37,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-12 02:05:37,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-12 02:05:37,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2116 transitions. [2023-11-12 02:05:37,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292960032460945 [2023-11-12 02:05:37,103 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2116 transitions. [2023-11-12 02:05:37,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2116 transitions. [2023-11-12 02:05:37,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:37,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2116 transitions. [2023-11-12 02:05:37,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 68.25806451612904) internal successors, (2116), 31 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:37,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 159.0) internal successors, (5088), 32 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:37,117 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 159.0) internal successors, (5088), 32 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:37,118 INFO L175 Difference]: Start difference. First operand has 156 places, 137 transitions, 1346 flow. Second operand 31 states and 2116 transitions. [2023-11-12 02:05:37,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 228 transitions, 2183 flow [2023-11-12 02:05:37,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 228 transitions, 1976 flow, removed 20 selfloop flow, removed 26 redundant places. [2023-11-12 02:05:37,153 INFO L231 Difference]: Finished difference. Result has 158 places, 137 transitions, 1432 flow [2023-11-12 02:05:37,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1432, PETRI_PLACES=158, PETRI_TRANSITIONS=137} [2023-11-12 02:05:37,154 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 138 predicate places. [2023-11-12 02:05:37,154 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 137 transitions, 1432 flow [2023-11-12 02:05:37,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 64.76) internal successors, (1619), 25 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:37,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:37,155 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:37,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:37,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:05:37,361 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:37,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:37,362 INFO L85 PathProgramCache]: Analyzing trace with hash 625405778, now seen corresponding path program 14 times [2023-11-12 02:05:37,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:37,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338089923] [2023-11-12 02:05:37,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:37,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:37,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:37,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338089923] [2023-11-12 02:05:37,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338089923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:37,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860282266] [2023-11-12 02:05:37,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:05:37,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:37,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:37,607 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:37,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:05:37,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:05:37,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:05:37,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:05:37,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:37,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:05:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:38,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860282266] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:05:38,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:05:38,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-12 02:05:38,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190098075] [2023-11-12 02:05:38,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:05:38,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:05:38,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:38,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:05:38,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:05:38,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 159 [2023-11-12 02:05:38,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 137 transitions, 1432 flow. Second operand has 25 states, 25 states have (on average 64.84) internal successors, (1621), 25 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:38,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:38,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 159 [2023-11-12 02:05:38,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:40,252 INFO L124 PetriNetUnfolderBase]: 427/890 cut-off events. [2023-11-12 02:05:40,252 INFO L125 PetriNetUnfolderBase]: For 10185/10185 co-relation queries the response was YES. [2023-11-12 02:05:40,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5177 conditions, 890 events. 427/890 cut-off events. For 10185/10185 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4957 event pairs, 64 based on Foata normal form. 3/893 useless extension candidates. Maximal degree in co-relation 5069. Up to 508 conditions per place. [2023-11-12 02:05:40,266 INFO L140 encePairwiseOnDemand]: 151/159 looper letters, 136 selfloop transitions, 86 changer transitions 20/242 dead transitions. [2023-11-12 02:05:40,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 242 transitions, 2563 flow [2023-11-12 02:05:40,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-12 02:05:40,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-12 02:05:40,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2105 transitions. [2023-11-12 02:05:40,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42706431324812333 [2023-11-12 02:05:40,272 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2105 transitions. [2023-11-12 02:05:40,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2105 transitions. [2023-11-12 02:05:40,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:40,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2105 transitions. [2023-11-12 02:05:40,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 67.90322580645162) internal successors, (2105), 31 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:40,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 159.0) internal successors, (5088), 32 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:40,288 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 159.0) internal successors, (5088), 32 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:40,288 INFO L175 Difference]: Start difference. First operand has 158 places, 137 transitions, 1432 flow. Second operand 31 states and 2105 transitions. [2023-11-12 02:05:40,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 242 transitions, 2563 flow [2023-11-12 02:05:40,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 242 transitions, 2243 flow, removed 57 selfloop flow, removed 23 redundant places. [2023-11-12 02:05:40,344 INFO L231 Difference]: Finished difference. Result has 171 places, 156 transitions, 1593 flow [2023-11-12 02:05:40,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1593, PETRI_PLACES=171, PETRI_TRANSITIONS=156} [2023-11-12 02:05:40,345 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 151 predicate places. [2023-11-12 02:05:40,345 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 156 transitions, 1593 flow [2023-11-12 02:05:40,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 64.84) internal successors, (1621), 25 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:40,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:40,346 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:40,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:05:40,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:05:40,553 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:05:40,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:40,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1111443048, now seen corresponding path program 15 times [2023-11-12 02:05:40,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:40,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204372923] [2023-11-12 02:05:40,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:40,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:40,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:40,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204372923] [2023-11-12 02:05:40,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204372923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:05:40,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121664202] [2023-11-12 02:05:40,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:05:40,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:05:40,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:05:40,796 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:05:40,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9349d4f4-d3e3-444d-998d-888e93585fbf/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:05:40,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:05:40,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:05:40,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:05:40,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:05:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:41,154 INFO L327 TraceCheckSpWp]: Computing backward predicates...