./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU --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 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:14:40,556 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:14:40,640 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:14:40,646 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:14:40,647 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:14:40,681 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:14:40,682 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:14:40,682 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:14:40,684 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:14:40,685 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:14:40,685 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:14:40,687 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:14:40,687 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:14:40,688 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:14:40,688 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:14:40,690 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:14:40,691 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:14:40,691 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:14:40,691 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:14:40,692 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:14:40,692 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:14:40,692 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:14:40,693 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:14:40,693 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:14:40,693 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:14:40,693 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:14:40,694 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:14:40,694 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:14:40,694 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:14:40,695 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:14:40,695 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:14:40,695 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:14:40,695 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:14:40,696 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:14:40,696 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:14:40,696 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:14:40,696 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:14:40,697 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:14:40,697 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:14:40,697 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:14:40,697 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:14:40,698 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:14:40,698 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_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd [2024-10-31 22:14:40,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:14:40,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:14:41,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:14:41,002 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:14:41,002 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:14:41,004 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c Unable to find full path for "g++" [2024-10-31 22:14:43,003 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:14:43,233 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:14:43,237 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-10-31 22:14:43,248 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/data/f932786b0/0320c07a061642ceb1f43d41398bddba/FLAG9b39bd58e [2024-10-31 22:14:43,569 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/data/f932786b0/0320c07a061642ceb1f43d41398bddba [2024-10-31 22:14:43,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:14:43,577 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:14:43,581 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:14:43,583 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:14:43,590 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:14:43,591 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:14:43" (1/1) ... [2024-10-31 22:14:43,594 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2159b351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:43, skipping insertion in model container [2024-10-31 22:14:43,595 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:14:43" (1/1) ... [2024-10-31 22:14:43,622 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:14:43,873 WARN L251 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_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-10-31 22:14:43,879 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:14:43,892 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:14:43,916 WARN L251 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_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-10-31 22:14:43,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:14:43,939 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:14:43,940 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:43 WrapperNode [2024-10-31 22:14:43,940 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:14:43,941 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:14:43,942 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:14:43,942 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:14:43,952 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:43" (1/1) ... [2024-10-31 22:14:43,963 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:43" (1/1) ... [2024-10-31 22:14:43,986 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2024-10-31 22:14:43,988 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:14:43,989 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:14:43,989 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:14:43,989 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:14:44,003 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:43" (1/1) ... [2024-10-31 22:14:44,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:43" (1/1) ... [2024-10-31 22:14:44,005 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:43" (1/1) ... [2024-10-31 22:14:44,025 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 22:14:44,029 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:43" (1/1) ... [2024-10-31 22:14:44,030 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:43" (1/1) ... [2024-10-31 22:14:44,038 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:43" (1/1) ... [2024-10-31 22:14:44,044 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:43" (1/1) ... [2024-10-31 22:14:44,048 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:43" (1/1) ... [2024-10-31 22:14:44,049 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:43" (1/1) ... [2024-10-31 22:14:44,053 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:14:44,054 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:14:44,056 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:14:44,057 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:14:44,058 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:43" (1/1) ... [2024-10-31 22:14:44,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:14:44,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:44,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:14:44,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:14:44,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:14:44,139 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:14:44,139 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:14:44,139 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:14:44,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:14:44,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:14:44,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:14:44,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:14:44,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:14:44,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:14:44,144 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:14:44,266 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:14:44,269 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:14:44,477 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:14:44,477 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:14:44,713 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:14:44,713 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 22:14:44,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:14:44 BoogieIcfgContainer [2024-10-31 22:14:44,714 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:14:44,717 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:14:44,717 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:14:44,724 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:14:44,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:14:43" (1/3) ... [2024-10-31 22:14:44,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e54b36a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:14:44, skipping insertion in model container [2024-10-31 22:14:44,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:43" (2/3) ... [2024-10-31 22:14:44,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e54b36a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:14:44, skipping insertion in model container [2024-10-31 22:14:44,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:14:44" (3/3) ... [2024-10-31 22:14:44,727 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2024-10-31 22:14:44,743 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:14:44,744 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:14:44,744 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:14:44,800 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:14:44,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-10-31 22:14:44,894 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-31 22:14:44,894 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:14:44,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-10-31 22:14:44,902 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-10-31 22:14:44,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-10-31 22:14:44,927 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:14:44,937 INFO L333 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, 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;@2b52dcc1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:14:44,938 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-31 22:14:44,956 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:14:44,957 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-10-31 22:14:44,957 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:14:44,957 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:44,958 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:44,959 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:44,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:44,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1426367925, now seen corresponding path program 1 times [2024-10-31 22:14:44,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:44,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54357619] [2024-10-31 22:14:44,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:44,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:45,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:45,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54357619] [2024-10-31 22:14:45,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54357619] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:45,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:45,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:14:45,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121683112] [2024-10-31 22:14:45,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:45,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:14:45,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:45,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:14:45,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:45,525 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-10-31 22:14:45,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:45,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:45,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-10-31 22:14:45,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:45,640 INFO L124 PetriNetUnfolderBase]: 73/144 cut-off events. [2024-10-31 22:14:45,640 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-31 22:14:45,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 144 events. 73/144 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 410 event pairs, 22 based on Foata normal form. 1/141 useless extension candidates. Maximal degree in co-relation 252. Up to 74 conditions per place. [2024-10-31 22:14:45,644 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 20 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2024-10-31 22:14:45,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 28 transitions, 127 flow [2024-10-31 22:14:45,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:14:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:14:45,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-10-31 22:14:45,658 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-10-31 22:14:45,660 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 3 states and 41 transitions. [2024-10-31 22:14:45,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 28 transitions, 127 flow [2024-10-31 22:14:45,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:14:45,667 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 52 flow [2024-10-31 22:14:45,669 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2024-10-31 22:14:45,673 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2024-10-31 22:14:45,673 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 52 flow [2024-10-31 22:14:45,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:45,674 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:45,674 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:45,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:14:45,675 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:45,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:45,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2133826849, now seen corresponding path program 1 times [2024-10-31 22:14:45,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:45,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486265602] [2024-10-31 22:14:45,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:45,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:45,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:45,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486265602] [2024-10-31 22:14:45,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486265602] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:45,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:45,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:14:45,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47262864] [2024-10-31 22:14:45,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:45,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:14:45,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:45,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:14:45,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:45,917 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-31 22:14:45,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:45,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:45,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-31 22:14:45,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:46,112 INFO L124 PetriNetUnfolderBase]: 141/258 cut-off events. [2024-10-31 22:14:46,112 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-31 22:14:46,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 258 events. 141/258 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 889 event pairs, 81 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 277. Up to 179 conditions per place. [2024-10-31 22:14:46,118 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-10-31 22:14:46,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 27 transitions, 117 flow [2024-10-31 22:14:46,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:14:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2024-10-31 22:14:46,122 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-10-31 22:14:46,122 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 52 flow. Second operand 4 states and 41 transitions. [2024-10-31 22:14:46,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 27 transitions, 117 flow [2024-10-31 22:14:46,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:14:46,125 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-10-31 22:14:46,126 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2024-10-31 22:14:46,127 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-10-31 22:14:46,127 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-10-31 22:14:46,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:46,128 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:46,128 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:46,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:14:46,129 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:46,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:46,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1055225553, now seen corresponding path program 1 times [2024-10-31 22:14:46,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:46,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654161798] [2024-10-31 22:14:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:46,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:46,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:46,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654161798] [2024-10-31 22:14:46,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654161798] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:46,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062781875] [2024-10-31 22:14:46,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:46,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:46,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:46,641 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:46,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:14:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:46,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 22:14:46,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:47,236 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:47,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062781875] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:47,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:47,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2024-10-31 22:14:47,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815234138] [2024-10-31 22:14:47,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:47,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 22:14:47,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:47,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 22:14:47,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:14:47,826 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-31 22:14:47,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:47,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:47,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-31 22:14:47,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:48,888 INFO L124 PetriNetUnfolderBase]: 580/998 cut-off events. [2024-10-31 22:14:48,888 INFO L125 PetriNetUnfolderBase]: For 237/237 co-relation queries the response was YES. [2024-10-31 22:14:48,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 998 events. 580/998 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4177 event pairs, 28 based on Foata normal form. 2/920 useless extension candidates. Maximal degree in co-relation 879. Up to 244 conditions per place. [2024-10-31 22:14:48,901 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 114 selfloop transitions, 42 changer transitions 12/169 dead transitions. [2024-10-31 22:14:48,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 169 transitions, 831 flow [2024-10-31 22:14:48,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-31 22:14:48,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-31 22:14:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 223 transitions. [2024-10-31 22:14:48,907 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5588972431077694 [2024-10-31 22:14:48,907 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 19 states and 223 transitions. [2024-10-31 22:14:48,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 169 transitions, 831 flow [2024-10-31 22:14:48,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 169 transitions, 807 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-10-31 22:14:48,916 INFO L231 Difference]: Finished difference. Result has 52 places, 65 transitions, 412 flow [2024-10-31 22:14:48,917 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=412, PETRI_PLACES=52, PETRI_TRANSITIONS=65} [2024-10-31 22:14:48,918 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 29 predicate places. [2024-10-31 22:14:48,918 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 65 transitions, 412 flow [2024-10-31 22:14:48,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:48,920 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:48,920 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:48,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:14:49,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:49,123 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:49,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:49,125 INFO L85 PathProgramCache]: Analyzing trace with hash -987841917, now seen corresponding path program 2 times [2024-10-31 22:14:49,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:49,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409325701] [2024-10-31 22:14:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:49,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:49,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:49,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409325701] [2024-10-31 22:14:49,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409325701] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:49,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407780160] [2024-10-31 22:14:49,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:14:49,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:49,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:49,303 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:49,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:14:49,368 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:14:49,368 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:49,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:14:49,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:49,501 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:49,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407780160] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:49,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:49,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 8] total 14 [2024-10-31 22:14:49,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900133232] [2024-10-31 22:14:49,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:49,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:14:49,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:49,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:14:49,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:14:50,020 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-31 22:14:50,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 65 transitions, 412 flow. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:50,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:50,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-31 22:14:50,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:50,942 INFO L124 PetriNetUnfolderBase]: 814/1407 cut-off events. [2024-10-31 22:14:50,943 INFO L125 PetriNetUnfolderBase]: For 3056/3056 co-relation queries the response was YES. [2024-10-31 22:14:50,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4916 conditions, 1407 events. 814/1407 cut-off events. For 3056/3056 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6686 event pairs, 0 based on Foata normal form. 30/1437 useless extension candidates. Maximal degree in co-relation 4629. Up to 358 conditions per place. [2024-10-31 22:14:50,957 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 114 selfloop transitions, 145 changer transitions 15/275 dead transitions. [2024-10-31 22:14:50,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 275 transitions, 2256 flow [2024-10-31 22:14:50,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-31 22:14:50,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-31 22:14:50,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 164 transitions. [2024-10-31 22:14:50,962 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41102756892230574 [2024-10-31 22:14:50,962 INFO L175 Difference]: Start difference. First operand has 52 places, 65 transitions, 412 flow. Second operand 19 states and 164 transitions. [2024-10-31 22:14:50,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 275 transitions, 2256 flow [2024-10-31 22:14:50,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 275 transitions, 2119 flow, removed 67 selfloop flow, removed 1 redundant places. [2024-10-31 22:14:50,995 INFO L231 Difference]: Finished difference. Result has 83 places, 202 transitions, 1877 flow [2024-10-31 22:14:50,995 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1877, PETRI_PLACES=83, PETRI_TRANSITIONS=202} [2024-10-31 22:14:50,997 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 60 predicate places. [2024-10-31 22:14:50,998 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 202 transitions, 1877 flow [2024-10-31 22:14:50,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:50,998 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:50,999 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:51,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:14:51,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:51,201 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:51,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:51,202 INFO L85 PathProgramCache]: Analyzing trace with hash 771752695, now seen corresponding path program 3 times [2024-10-31 22:14:51,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:51,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479200747] [2024-10-31 22:14:51,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:51,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:51,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:51,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479200747] [2024-10-31 22:14:51,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479200747] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:51,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576559426] [2024-10-31 22:14:51,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:14:51,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:51,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:51,435 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:51,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:14:51,499 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-31 22:14:51,499 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:51,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:14:51,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:51,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:52,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576559426] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:52,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:52,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-10-31 22:14:52,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393077352] [2024-10-31 22:14:52,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:52,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 22:14:52,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:52,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 22:14:52,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:14:52,019 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-31 22:14:52,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 202 transitions, 1877 flow. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:52,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:52,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-31 22:14:52,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:52,839 INFO L124 PetriNetUnfolderBase]: 1072/1906 cut-off events. [2024-10-31 22:14:52,840 INFO L125 PetriNetUnfolderBase]: For 11722/11732 co-relation queries the response was YES. [2024-10-31 22:14:52,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9514 conditions, 1906 events. 1072/1906 cut-off events. For 11722/11732 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10311 event pairs, 102 based on Foata normal form. 18/1922 useless extension candidates. Maximal degree in co-relation 7811. Up to 602 conditions per place. [2024-10-31 22:14:52,865 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 132 selfloop transitions, 186 changer transitions 23/375 dead transitions. [2024-10-31 22:14:52,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 375 transitions, 4182 flow [2024-10-31 22:14:52,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-31 22:14:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-31 22:14:52,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 156 transitions. [2024-10-31 22:14:52,868 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-10-31 22:14:52,868 INFO L175 Difference]: Start difference. First operand has 83 places, 202 transitions, 1877 flow. Second operand 16 states and 156 transitions. [2024-10-31 22:14:52,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 375 transitions, 4182 flow [2024-10-31 22:14:52,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 375 transitions, 4095 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-10-31 22:14:52,956 INFO L231 Difference]: Finished difference. Result has 106 places, 304 transitions, 3747 flow [2024-10-31 22:14:52,957 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3747, PETRI_PLACES=106, PETRI_TRANSITIONS=304} [2024-10-31 22:14:52,957 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 83 predicate places. [2024-10-31 22:14:52,958 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 304 transitions, 3747 flow [2024-10-31 22:14:52,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:52,958 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:52,958 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:52,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:14:53,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:53,163 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:53,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:53,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1733481921, now seen corresponding path program 4 times [2024-10-31 22:14:53,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:53,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936239103] [2024-10-31 22:14:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:53,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:53,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:53,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936239103] [2024-10-31 22:14:53,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936239103] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:53,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990355478] [2024-10-31 22:14:53,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:14:53,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:53,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:53,480 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:53,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:14:53,550 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:14:53,550 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:53,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:14:53,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:53,764 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:54,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990355478] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:54,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:54,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2024-10-31 22:14:54,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881323774] [2024-10-31 22:14:54,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:54,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 22:14:54,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:54,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 22:14:54,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:14:54,048 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-31 22:14:54,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 304 transitions, 3747 flow. Second operand has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:54,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:54,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-31 22:14:54,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:56,068 INFO L124 PetriNetUnfolderBase]: 1541/2588 cut-off events. [2024-10-31 22:14:56,068 INFO L125 PetriNetUnfolderBase]: For 24606/24606 co-relation queries the response was YES. [2024-10-31 22:14:56,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15710 conditions, 2588 events. 1541/2588 cut-off events. For 24606/24606 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13668 event pairs, 21 based on Foata normal form. 35/2623 useless extension candidates. Maximal degree in co-relation 14554. Up to 585 conditions per place. [2024-10-31 22:14:56,116 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 225 selfloop transitions, 397 changer transitions 1/624 dead transitions. [2024-10-31 22:14:56,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 624 transitions, 8657 flow [2024-10-31 22:14:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-31 22:14:56,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-10-31 22:14:56,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 272 transitions. [2024-10-31 22:14:56,120 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-10-31 22:14:56,120 INFO L175 Difference]: Start difference. First operand has 106 places, 304 transitions, 3747 flow. Second operand 32 states and 272 transitions. [2024-10-31 22:14:56,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 624 transitions, 8657 flow [2024-10-31 22:14:56,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 624 transitions, 8467 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-10-31 22:14:56,344 INFO L231 Difference]: Finished difference. Result has 149 places, 504 transitions, 7521 flow [2024-10-31 22:14:56,344 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3625, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=7521, PETRI_PLACES=149, PETRI_TRANSITIONS=504} [2024-10-31 22:14:56,345 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 126 predicate places. [2024-10-31 22:14:56,345 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 504 transitions, 7521 flow [2024-10-31 22:14:56,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:56,346 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:56,346 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:56,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:14:56,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:14:56,551 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:56,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:56,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1329935501, now seen corresponding path program 5 times [2024-10-31 22:14:56,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:56,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186294324] [2024-10-31 22:14:56,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:56,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:56,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:56,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186294324] [2024-10-31 22:14:56,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186294324] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:56,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781132925] [2024-10-31 22:14:56,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 22:14:56,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:56,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:56,856 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:56,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:14:56,914 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:14:56,914 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:56,915 INFO L255 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:14:56,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:57,388 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:57,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781132925] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:57,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:57,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 18 [2024-10-31 22:14:57,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289049614] [2024-10-31 22:14:57,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:57,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-31 22:14:57,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:57,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-31 22:14:57,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-10-31 22:14:57,761 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-31 22:14:57,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 504 transitions, 7521 flow. Second operand has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 18 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:57,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:57,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-31 22:14:57,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:01,992 INFO L124 PetriNetUnfolderBase]: 2089/3638 cut-off events. [2024-10-31 22:15:01,992 INFO L125 PetriNetUnfolderBase]: For 54698/54702 co-relation queries the response was YES. [2024-10-31 22:15:02,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25712 conditions, 3638 events. 2089/3638 cut-off events. For 54698/54702 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21747 event pairs, 31 based on Foata normal form. 74/3712 useless extension candidates. Maximal degree in co-relation 24360. Up to 821 conditions per place. [2024-10-31 22:15:02,085 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 191 selfloop transitions, 732 changer transitions 2/973 dead transitions. [2024-10-31 22:15:02,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 973 transitions, 15594 flow [2024-10-31 22:15:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-10-31 22:15:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2024-10-31 22:15:02,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 492 transitions. [2024-10-31 22:15:02,090 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4039408866995074 [2024-10-31 22:15:02,091 INFO L175 Difference]: Start difference. First operand has 149 places, 504 transitions, 7521 flow. Second operand 58 states and 492 transitions. [2024-10-31 22:15:02,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 973 transitions, 15594 flow [2024-10-31 22:15:02,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 973 transitions, 15244 flow, removed 164 selfloop flow, removed 6 redundant places. [2024-10-31 22:15:02,755 INFO L231 Difference]: Finished difference. Result has 211 places, 834 transitions, 14291 flow [2024-10-31 22:15:02,755 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7339, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=14291, PETRI_PLACES=211, PETRI_TRANSITIONS=834} [2024-10-31 22:15:02,756 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 188 predicate places. [2024-10-31 22:15:02,757 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 834 transitions, 14291 flow [2024-10-31 22:15:02,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 18 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:02,757 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:02,757 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:02,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:15:02,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:02,962 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:15:02,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:02,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1088901193, now seen corresponding path program 6 times [2024-10-31 22:15:02,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:02,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158968195] [2024-10-31 22:15:02,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:02,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:03,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:03,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158968195] [2024-10-31 22:15:03,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158968195] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:03,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722909295] [2024-10-31 22:15:03,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 22:15:03,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:03,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:03,281 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:03,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:15:03,344 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-31 22:15:03,344 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:15:03,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:15:03,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:03,472 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:03,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722909295] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:03,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:03,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-10-31 22:15:03,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450559412] [2024-10-31 22:15:03,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:03,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:15:03,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:03,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:15:03,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:15:03,725 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-10-31 22:15:03,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 834 transitions, 14291 flow. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:03,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:03,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-10-31 22:15:03,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:06,057 INFO L124 PetriNetUnfolderBase]: 2240/3874 cut-off events. [2024-10-31 22:15:06,057 INFO L125 PetriNetUnfolderBase]: For 53591/53607 co-relation queries the response was YES. [2024-10-31 22:15:06,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30104 conditions, 3874 events. 2240/3874 cut-off events. For 53591/53607 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23388 event pairs, 92 based on Foata normal form. 10/3882 useless extension candidates. Maximal degree in co-relation 28939. Up to 902 conditions per place. [2024-10-31 22:15:06,142 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 282 selfloop transitions, 620 changer transitions 4/954 dead transitions. [2024-10-31 22:15:06,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 954 transitions, 17877 flow [2024-10-31 22:15:06,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-31 22:15:06,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-31 22:15:06,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 191 transitions. [2024-10-31 22:15:06,144 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-10-31 22:15:06,145 INFO L175 Difference]: Start difference. First operand has 211 places, 834 transitions, 14291 flow. Second operand 20 states and 191 transitions. [2024-10-31 22:15:06,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 954 transitions, 17877 flow [2024-10-31 22:15:07,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 954 transitions, 17036 flow, removed 405 selfloop flow, removed 4 redundant places. [2024-10-31 22:15:07,265 INFO L231 Difference]: Finished difference. Result has 230 places, 903 transitions, 16874 flow [2024-10-31 22:15:07,266 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=13493, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=545, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=16874, PETRI_PLACES=230, PETRI_TRANSITIONS=903} [2024-10-31 22:15:07,267 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 207 predicate places. [2024-10-31 22:15:07,268 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 903 transitions, 16874 flow [2024-10-31 22:15:07,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:07,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:07,269 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:07,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-31 22:15:07,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:07,472 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:15:07,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:07,473 INFO L85 PathProgramCache]: Analyzing trace with hash -769456077, now seen corresponding path program 7 times [2024-10-31 22:15:07,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:07,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345397655] [2024-10-31 22:15:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:07,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:07,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:07,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345397655] [2024-10-31 22:15:07,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345397655] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:07,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220321700] [2024-10-31 22:15:07,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-31 22:15:07,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:07,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:07,847 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:07,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fc57b5d-44c1-46c3-ad8b-72025d4f5fea/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:15:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:07,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:15:07,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:08,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:08,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220321700] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:08,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:08,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2024-10-31 22:15:08,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447916308] [2024-10-31 22:15:08,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:08,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 22:15:08,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:08,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 22:15:08,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:15:08,520 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-10-31 22:15:08,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 903 transitions, 16874 flow. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:08,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:08,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-10-31 22:15:08,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand