./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:29:53,322 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:29:53,399 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:29:53,406 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:29:53,410 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:29:53,445 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:29:53,451 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:29:53,452 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:29:53,453 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:29:53,458 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:29:53,459 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:29:53,460 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:29:53,461 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:29:53,463 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:29:53,463 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:29:53,464 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:29:53,464 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:29:53,465 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:29:53,465 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:29:53,466 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:29:53,466 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:29:53,467 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:29:53,467 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:29:53,468 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:29:53,468 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:29:53,469 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:29:53,469 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:29:53,477 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:29:53,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:29:53,478 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:29:53,479 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:29:53,480 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:29:53,480 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:29:53,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:29:53,480 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:29:53,481 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:29:53,481 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:29:53,481 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:29:53,482 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:29:53,482 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_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 [2023-11-12 02:29:53,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:29:53,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:29:53,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:29:53,797 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:29:53,798 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:29:53,799 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2023-11-12 02:29:56,838 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:29:57,104 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:29:57,105 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2023-11-12 02:29:57,114 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/data/52a1d21b6/214f83fc51df465b8707f2199e4d3206/FLAG052c0f6aa [2023-11-12 02:29:57,130 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/data/52a1d21b6/214f83fc51df465b8707f2199e4d3206 [2023-11-12 02:29:57,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:29:57,135 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:29:57,136 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:29:57,137 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:29:57,142 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:29:57,143 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:29:57" (1/1) ... [2023-11-12 02:29:57,144 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41c23f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:57, skipping insertion in model container [2023-11-12 02:29:57,144 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:29:57" (1/1) ... [2023-11-12 02:29:57,189 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:29:57,404 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4827,4840] [2023-11-12 02:29:57,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:29:57,428 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:29:57,492 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4827,4840] [2023-11-12 02:29:57,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:29:57,533 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:29:57,534 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:57 WrapperNode [2023-11-12 02:29:57,534 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:29:57,536 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:29:57,536 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:29:57,536 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:29:57,544 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:57" (1/1) ... [2023-11-12 02:29:57,577 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:57" (1/1) ... [2023-11-12 02:29:57,631 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 319 [2023-11-12 02:29:57,632 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:29:57,632 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:29:57,633 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:29:57,633 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:29:57,645 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:57" (1/1) ... [2023-11-12 02:29:57,646 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:57" (1/1) ... [2023-11-12 02:29:57,668 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:57" (1/1) ... [2023-11-12 02:29:57,668 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:57" (1/1) ... [2023-11-12 02:29:57,679 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:57" (1/1) ... [2023-11-12 02:29:57,700 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:57" (1/1) ... [2023-11-12 02:29:57,703 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:57" (1/1) ... [2023-11-12 02:29:57,718 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:57" (1/1) ... [2023-11-12 02:29:57,722 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:29:57,723 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:29:57,724 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:29:57,724 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:29:57,725 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:57" (1/1) ... [2023-11-12 02:29:57,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:29:57,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:57,771 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:29:57,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:29:57,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:29:57,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:29:57,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:29:57,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:29:57,817 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:29:57,818 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:29:57,818 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:29:57,818 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:29:57,819 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:29:57,819 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:29:57,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:29:57,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:29:57,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:29:57,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:29:57,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:29:57,824 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:29:58,008 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:29:58,010 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:29:58,628 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:29:58,646 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:29:58,646 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 02:29:58,650 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:29:58 BoogieIcfgContainer [2023-11-12 02:29:58,650 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:29:58,653 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:29:58,653 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:29:58,657 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:29:58,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:29:57" (1/3) ... [2023-11-12 02:29:58,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc00002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:29:58, skipping insertion in model container [2023-11-12 02:29:58,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:29:57" (2/3) ... [2023-11-12 02:29:58,659 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc00002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:29:58, skipping insertion in model container [2023-11-12 02:29:58,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:29:58" (3/3) ... [2023-11-12 02:29:58,661 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2023-11-12 02:29:58,673 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:29:58,685 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:29:58,686 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:29:58,687 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:29:58,857 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 02:29:58,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 394 transitions, 809 flow [2023-11-12 02:29:59,264 INFO L124 PetriNetUnfolderBase]: 26/391 cut-off events. [2023-11-12 02:29:59,267 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:29:59,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 391 events. 26/391 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 919 event pairs, 0 based on Foata normal form. 0/364 useless extension candidates. Maximal degree in co-relation 291. Up to 2 conditions per place. [2023-11-12 02:29:59,284 INFO L82 GeneralOperation]: Start removeDead. Operand has 378 places, 394 transitions, 809 flow [2023-11-12 02:29:59,297 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 364 places, 380 transitions, 778 flow [2023-11-12 02:29:59,301 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:29:59,311 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 364 places, 380 transitions, 778 flow [2023-11-12 02:29:59,314 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 364 places, 380 transitions, 778 flow [2023-11-12 02:29:59,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 364 places, 380 transitions, 778 flow [2023-11-12 02:29:59,425 INFO L124 PetriNetUnfolderBase]: 26/380 cut-off events. [2023-11-12 02:29:59,425 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:29:59,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 380 events. 26/380 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 916 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 291. Up to 2 conditions per place. [2023-11-12 02:29:59,455 INFO L119 LiptonReduction]: Number of co-enabled transitions 36288 [2023-11-12 02:30:14,376 INFO L134 LiptonReduction]: Checked pairs total: 33315 [2023-11-12 02:30:14,376 INFO L136 LiptonReduction]: Total number of compositions: 456 [2023-11-12 02:30:14,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:30:14,401 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3b0a79be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:30:14,401 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 02:30:14,408 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:30:14,409 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-12 02:30:14,409 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:30:14,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:14,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:14,410 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:30:14,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:14,416 INFO L85 PathProgramCache]: Analyzing trace with hash 506878946, now seen corresponding path program 1 times [2023-11-12 02:30:14,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:14,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290500117] [2023-11-12 02:30:14,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:14,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:14,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:14,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290500117] [2023-11-12 02:30:14,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290500117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:14,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:14,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:30:14,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112074313] [2023-11-12 02:30:14,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:15,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:30:15,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:15,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:30:15,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:30:15,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 362 out of 850 [2023-11-12 02:30:15,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 368.6666666666667) internal successors, (1106), 3 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:15,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:15,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 362 of 850 [2023-11-12 02:30:15,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:15,208 INFO L124 PetriNetUnfolderBase]: 221/328 cut-off events. [2023-11-12 02:30:15,209 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-12 02:30:15,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 328 events. 221/328 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 773 event pairs, 138 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 534. Up to 328 conditions per place. [2023-11-12 02:30:15,213 INFO L140 encePairwiseOnDemand]: 847/850 looper letters, 23 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-11-12 02:30:15,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 118 flow [2023-11-12 02:30:15,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:30:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:30:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1112 transitions. [2023-11-12 02:30:15,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43607843137254904 [2023-11-12 02:30:15,237 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1112 transitions. [2023-11-12 02:30:15,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1112 transitions. [2023-11-12 02:30:15,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:15,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1112 transitions. [2023-11-12 02:30:15,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 370.6666666666667) internal successors, (1112), 3 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:15,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 850.0) internal successors, (3400), 4 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:15,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 850.0) internal successors, (3400), 4 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:15,268 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 1112 transitions. [2023-11-12 02:30:15,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 118 flow [2023-11-12 02:30:15,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 106 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-12 02:30:15,274 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2023-11-12 02:30:15,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2023-11-12 02:30:15,280 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-12 02:30:15,284 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2023-11-12 02:30:15,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 368.6666666666667) internal successors, (1106), 3 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:15,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:15,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:15,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:30:15,286 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:30:15,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:15,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1294903834, now seen corresponding path program 1 times [2023-11-12 02:30:15,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:15,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129773927] [2023-11-12 02:30:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:15,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:15,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:15,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129773927] [2023-11-12 02:30:15,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129773927] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:15,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819008973] [2023-11-12 02:30:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:15,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:15,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:15,528 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:15,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:30:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:15,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:30:15,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:15,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:30:15,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819008973] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:15,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:30:15,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:30:15,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771841585] [2023-11-12 02:30:15,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:15,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:30:15,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:15,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:30:15,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:30:15,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 360 out of 850 [2023-11-12 02:30:15,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 363.85714285714283) internal successors, (2547), 7 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:15,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:15,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 360 of 850 [2023-11-12 02:30:15,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:15,994 INFO L124 PetriNetUnfolderBase]: 221/330 cut-off events. [2023-11-12 02:30:15,994 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:30:15,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 330 events. 221/330 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 767 event pairs, 138 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 673. Up to 328 conditions per place. [2023-11-12 02:30:15,997 INFO L140 encePairwiseOnDemand]: 847/850 looper letters, 23 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-11-12 02:30:15,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 128 flow [2023-11-12 02:30:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:30:15,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:30:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1829 transitions. [2023-11-12 02:30:16,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303529411764706 [2023-11-12 02:30:16,006 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1829 transitions. [2023-11-12 02:30:16,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1829 transitions. [2023-11-12 02:30:16,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:16,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1829 transitions. [2023-11-12 02:30:16,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 365.8) internal successors, (1829), 5 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:16,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 850.0) internal successors, (5100), 6 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:16,030 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 850.0) internal successors, (5100), 6 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:16,030 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 1829 transitions. [2023-11-12 02:30:16,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 128 flow [2023-11-12 02:30:16,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 124 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:30:16,032 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 88 flow [2023-11-12 02:30:16,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-11-12 02:30:16,033 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-12 02:30:16,034 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 88 flow [2023-11-12 02:30:16,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 363.85714285714283) internal successors, (2547), 7 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:16,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:16,037 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:16,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:16,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 02:30:16,245 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:30:16,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:16,245 INFO L85 PathProgramCache]: Analyzing trace with hash -760708134, now seen corresponding path program 2 times [2023-11-12 02:30:16,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:16,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656525074] [2023-11-12 02:30:16,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:16,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:30:16,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:16,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656525074] [2023-11-12 02:30:16,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656525074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:16,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:16,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:30:16,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455819568] [2023-11-12 02:30:16,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:16,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:30:16,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:16,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:30:16,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:30:16,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 850 [2023-11-12 02:30:16,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 356.25) internal successors, (1425), 4 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:16,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:16,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 850 [2023-11-12 02:30:16,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:17,148 INFO L124 PetriNetUnfolderBase]: 381/567 cut-off events. [2023-11-12 02:30:17,149 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:30:17,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 567 events. 381/567 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1720 event pairs, 138 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1148. Up to 331 conditions per place. [2023-11-12 02:30:17,153 INFO L140 encePairwiseOnDemand]: 846/850 looper letters, 37 selfloop transitions, 2 changer transitions 17/56 dead transitions. [2023-11-12 02:30:17,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 265 flow [2023-11-12 02:30:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:30:17,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:30:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1458 transitions. [2023-11-12 02:30:17,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4288235294117647 [2023-11-12 02:30:17,162 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1458 transitions. [2023-11-12 02:30:17,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1458 transitions. [2023-11-12 02:30:17,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:17,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1458 transitions. [2023-11-12 02:30:17,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 364.5) internal successors, (1458), 4 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:17,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 850.0) internal successors, (4250), 5 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:17,181 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 850.0) internal successors, (4250), 5 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:17,182 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 88 flow. Second operand 4 states and 1458 transitions. [2023-11-12 02:30:17,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 265 flow [2023-11-12 02:30:17,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 56 transitions, 255 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-12 02:30:17,185 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 92 flow [2023-11-12 02:30:17,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-11-12 02:30:17,187 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-11-12 02:30:17,187 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 92 flow [2023-11-12 02:30:17,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 356.25) internal successors, (1425), 4 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:17,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:17,189 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:17,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:30:17,190 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:30:17,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:17,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1589601508, now seen corresponding path program 1 times [2023-11-12 02:30:17,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:17,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296856551] [2023-11-12 02:30:17,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:17,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:30:17,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:17,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296856551] [2023-11-12 02:30:17,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296856551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:17,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:17,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:30:17,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845596409] [2023-11-12 02:30:17,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:17,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:30:17,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:17,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:30:17,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:30:17,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 850 [2023-11-12 02:30:17,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 356.5) internal successors, (1426), 4 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:17,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:17,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 850 [2023-11-12 02:30:17,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:18,077 INFO L124 PetriNetUnfolderBase]: 462/680 cut-off events. [2023-11-12 02:30:18,077 INFO L125 PetriNetUnfolderBase]: For 222/222 co-relation queries the response was YES. [2023-11-12 02:30:18,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 680 events. 462/680 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2133 event pairs, 183 based on Foata normal form. 1/509 useless extension candidates. Maximal degree in co-relation 1602. Up to 416 conditions per place. [2023-11-12 02:30:18,082 INFO L140 encePairwiseOnDemand]: 846/850 looper letters, 39 selfloop transitions, 2 changer transitions 16/57 dead transitions. [2023-11-12 02:30:18,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 57 transitions, 290 flow [2023-11-12 02:30:18,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:30:18,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:30:18,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1456 transitions. [2023-11-12 02:30:18,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42823529411764705 [2023-11-12 02:30:18,089 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1456 transitions. [2023-11-12 02:30:18,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1456 transitions. [2023-11-12 02:30:18,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:18,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1456 transitions. [2023-11-12 02:30:18,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:18,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 850.0) internal successors, (4250), 5 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:18,110 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 850.0) internal successors, (4250), 5 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:18,110 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 92 flow. Second operand 4 states and 1456 transitions. [2023-11-12 02:30:18,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 57 transitions, 290 flow [2023-11-12 02:30:18,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 276 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-12 02:30:18,114 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 100 flow [2023-11-12 02:30:18,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-11-12 02:30:18,117 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-11-12 02:30:18,117 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 100 flow [2023-11-12 02:30:18,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 356.5) internal successors, (1426), 4 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:18,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:18,122 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:18,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:30:18,123 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:30:18,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:18,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1059116461, now seen corresponding path program 1 times [2023-11-12 02:30:18,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:18,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062665185] [2023-11-12 02:30:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:18,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:30:19,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:19,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062665185] [2023-11-12 02:30:19,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062665185] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:19,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104672190] [2023-11-12 02:30:19,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:19,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:19,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:19,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:19,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:30:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:19,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-12 02:30:19,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:19,913 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 242 [2023-11-12 02:30:20,231 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2023-11-12 02:30:20,429 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 94 [2023-11-12 02:30:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:30:20,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:22,342 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:30:22,343 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 60 [2023-11-12 02:30:22,352 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-12 02:30:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:30:22,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104672190] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:22,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:30:22,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 29 [2023-11-12 02:30:22,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545676510] [2023-11-12 02:30:22,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:22,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-12 02:30:22,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:22,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-12 02:30:22,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=818, Unknown=7, NotChecked=0, Total=930 [2023-11-12 02:30:23,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 850 [2023-11-12 02:30:23,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 100 flow. Second operand has 31 states, 31 states have (on average 271.0967741935484) internal successors, (8404), 31 states have internal predecessors, (8404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:23,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:23,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 850 [2023-11-12 02:30:23,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:30:28,676 INFO L124 PetriNetUnfolderBase]: 942/1397 cut-off events. [2023-11-12 02:30:28,676 INFO L125 PetriNetUnfolderBase]: For 473/473 co-relation queries the response was YES. [2023-11-12 02:30:28,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3656 conditions, 1397 events. 942/1397 cut-off events. For 473/473 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5530 event pairs, 49 based on Foata normal form. 4/1053 useless extension candidates. Maximal degree in co-relation 3640. Up to 325 conditions per place. [2023-11-12 02:30:28,687 INFO L140 encePairwiseOnDemand]: 837/850 looper letters, 145 selfloop transitions, 63 changer transitions 39/247 dead transitions. [2023-11-12 02:30:28,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 247 transitions, 1201 flow [2023-11-12 02:30:28,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-12 02:30:28,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-12 02:30:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8314 transitions. [2023-11-12 02:30:28,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32603921568627453 [2023-11-12 02:30:28,723 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8314 transitions. [2023-11-12 02:30:28,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8314 transitions. [2023-11-12 02:30:28,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:30:28,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8314 transitions. [2023-11-12 02:30:28,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 277.1333333333333) internal successors, (8314), 30 states have internal predecessors, (8314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:28,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 850.0) internal successors, (26350), 31 states have internal predecessors, (26350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:28,818 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 850.0) internal successors, (26350), 31 states have internal predecessors, (26350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:28,818 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 100 flow. Second operand 30 states and 8314 transitions. [2023-11-12 02:30:28,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 247 transitions, 1201 flow [2023-11-12 02:30:28,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 247 transitions, 1150 flow, removed 16 selfloop flow, removed 2 redundant places. [2023-11-12 02:30:28,839 INFO L231 Difference]: Finished difference. Result has 82 places, 89 transitions, 545 flow [2023-11-12 02:30:28,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=850, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=545, PETRI_PLACES=82, PETRI_TRANSITIONS=89} [2023-11-12 02:30:28,843 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2023-11-12 02:30:28,844 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 89 transitions, 545 flow [2023-11-12 02:30:28,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 271.0967741935484) internal successors, (8404), 31 states have internal predecessors, (8404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:28,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:30:28,848 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:28,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:29,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:29,054 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:30:29,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:29,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1163544095, now seen corresponding path program 2 times [2023-11-12 02:30:29,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:29,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181183923] [2023-11-12 02:30:29,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:29,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:30:30,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:30,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181183923] [2023-11-12 02:30:30,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181183923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:30:30,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446524346] [2023-11-12 02:30:30,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:30:30,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:30,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:30,439 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:30,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cabc30d-6c3c-4ee3-8b44-c37bca8827a4/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:30:30,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:30:30,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:30:30,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-12 02:30:30,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:31,133 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 62 [2023-11-12 02:30:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:30:31,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:32,351 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 02:30:32,352 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 70 [2023-11-12 02:30:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:30:32,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446524346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:32,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:30:32,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2023-11-12 02:30:32,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138273254] [2023-11-12 02:30:32,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:32,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 02:30:32,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:32,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 02:30:32,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:30:35,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 850 [2023-11-12 02:30:35,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 89 transitions, 545 flow. Second operand has 24 states, 24 states have (on average 315.5833333333333) internal successors, (7574), 24 states have internal predecessors, (7574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:30:35,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:30:35,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 850 [2023-11-12 02:30:35,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand