./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-flipped-dist.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_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/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_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/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_292019bd-2de5-413d-8fa2-2b00f63eca3a/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 7cfd33ca5f647adf12592c5e71401ab9da35a49d8f2ec6d0757ea2cc237974cc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:27:30,196 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:27:30,273 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:27:30,278 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:27:30,279 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:27:30,305 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:27:30,306 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:27:30,307 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:27:30,308 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:27:30,309 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:27:30,310 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:27:30,310 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:27:30,311 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:27:30,312 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:27:30,312 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:27:30,313 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:27:30,313 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:27:30,314 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:27:30,315 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:27:30,315 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:27:30,316 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:27:30,324 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:27:30,324 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:27:30,325 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:27:30,325 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:27:30,326 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:27:30,327 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:27:30,327 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:27:30,328 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:27:30,328 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:27:30,328 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:27:30,329 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:27:30,329 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:27:30,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:27:30,330 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:27:30,330 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:27:30,330 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:27:30,330 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:27:30,331 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:27:30,331 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_292019bd-2de5-413d-8fa2-2b00f63eca3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cfd33ca5f647adf12592c5e71401ab9da35a49d8f2ec6d0757ea2cc237974cc [2023-11-12 02:27:30,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:27:30,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:27:30,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:27:30,647 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:27:30,647 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:27:30,649 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c [2023-11-12 02:27:33,866 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:27:34,053 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:27:34,054 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c [2023-11-12 02:27:34,061 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/data/1b04a58fd/12ca32b7a3cd45d592fc8c7e17ea6862/FLAGc6ee574d4 [2023-11-12 02:27:34,077 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/data/1b04a58fd/12ca32b7a3cd45d592fc8c7e17ea6862 [2023-11-12 02:27:34,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:27:34,081 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:27:34,083 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:27:34,083 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:27:34,089 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:27:34,090 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:27:34" (1/1) ... [2023-11-12 02:27:34,091 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b50976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:34, skipping insertion in model container [2023-11-12 02:27:34,091 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:27:34" (1/1) ... [2023-11-12 02:27:34,116 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:27:34,297 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_292019bd-2de5-413d-8fa2-2b00f63eca3a/sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c[2174,2187] [2023-11-12 02:27:34,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:27:34,314 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:27:34,339 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_292019bd-2de5-413d-8fa2-2b00f63eca3a/sv-benchmarks/c/weaver/mult-flipped-dist.wvr.c[2174,2187] [2023-11-12 02:27:34,344 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:27:34,366 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:27:34,366 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:34 WrapperNode [2023-11-12 02:27:34,367 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:27:34,368 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:27:34,368 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:27:34,368 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:27:34,377 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:34" (1/1) ... [2023-11-12 02:27:34,388 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:34" (1/1) ... [2023-11-12 02:27:34,408 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2023-11-12 02:27:34,408 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:27:34,409 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:27:34,409 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:27:34,410 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:27:34,420 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:34" (1/1) ... [2023-11-12 02:27:34,420 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:34" (1/1) ... [2023-11-12 02:27:34,423 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:34" (1/1) ... [2023-11-12 02:27:34,424 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:34" (1/1) ... [2023-11-12 02:27:34,431 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:34" (1/1) ... [2023-11-12 02:27:34,435 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:34" (1/1) ... [2023-11-12 02:27:34,437 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:34" (1/1) ... [2023-11-12 02:27:34,438 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:34" (1/1) ... [2023-11-12 02:27:34,441 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:27:34,442 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:27:34,442 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:27:34,442 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:27:34,443 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:34" (1/1) ... [2023-11-12 02:27:34,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:27:34,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:34,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:27:34,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:27:34,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:27:34,531 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:27:34,531 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:27:34,532 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:27:34,532 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:27:34,533 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:27:34,533 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:27:34,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:27:34,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:27:34,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:27:34,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:27:34,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:27:34,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:27:34,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:27:34,539 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 02:27:34,691 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:27:34,695 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:27:35,044 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:27:35,055 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:27:35,055 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:27:35,057 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:27:35 BoogieIcfgContainer [2023-11-12 02:27:35,058 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:27:35,061 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:27:35,061 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:27:35,068 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:27:35,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:27:34" (1/3) ... [2023-11-12 02:27:35,070 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3e30c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:27:35, skipping insertion in model container [2023-11-12 02:27:35,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:34" (2/3) ... [2023-11-12 02:27:35,070 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3e30c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:27:35, skipping insertion in model container [2023-11-12 02:27:35,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:27:35" (3/3) ... [2023-11-12 02:27:35,073 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.c [2023-11-12 02:27:35,086 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:27:35,098 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:27:35,098 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:27:35,099 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:27:35,224 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 02:27:35,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 112 transitions, 245 flow [2023-11-12 02:27:35,394 INFO L124 PetriNetUnfolderBase]: 7/109 cut-off events. [2023-11-12 02:27:35,396 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:27:35,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 109 events. 7/109 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2023-11-12 02:27:35,404 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 112 transitions, 245 flow [2023-11-12 02:27:35,414 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 98 transitions, 214 flow [2023-11-12 02:27:35,418 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:27:35,429 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 98 transitions, 214 flow [2023-11-12 02:27:35,433 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 101 places, 98 transitions, 214 flow [2023-11-12 02:27:35,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 98 transitions, 214 flow [2023-11-12 02:27:35,464 INFO L124 PetriNetUnfolderBase]: 7/98 cut-off events. [2023-11-12 02:27:35,465 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:27:35,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 98 events. 7/98 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2023-11-12 02:27:35,468 INFO L119 LiptonReduction]: Number of co-enabled transitions 1728 [2023-11-12 02:27:38,477 INFO L134 LiptonReduction]: Checked pairs total: 1586 [2023-11-12 02:27:38,478 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-11-12 02:27:38,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:27:38,500 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;@2b8226b2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:27:38,501 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 02:27:38,522 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:27:38,525 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2023-11-12 02:27:38,525 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:27:38,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:38,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:38,527 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 02:27:38,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:38,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1519020390, now seen corresponding path program 1 times [2023-11-12 02:27:38,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:38,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066840337] [2023-11-12 02:27:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:38,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:39,287 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 02:27:39,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:39,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066840337] [2023-11-12 02:27:39,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066840337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:39,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:39,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:27:39,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855891441] [2023-11-12 02:27:39,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:39,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:39,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:39,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:39,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:39,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 194 [2023-11-12 02:27:39,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states 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 02:27:39,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:39,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 194 [2023-11-12 02:27:39,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:39,597 INFO L124 PetriNetUnfolderBase]: 428/630 cut-off events. [2023-11-12 02:27:39,597 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2023-11-12 02:27:39,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1337 conditions, 630 events. 428/630 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2000 event pairs, 138 based on Foata normal form. 1/467 useless extension candidates. Maximal degree in co-relation 1030. Up to 389 conditions per place. [2023-11-12 02:27:39,609 INFO L140 encePairwiseOnDemand]: 189/194 looper letters, 36 selfloop transitions, 4 changer transitions 1/41 dead transitions. [2023-11-12 02:27:39,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 41 transitions, 197 flow [2023-11-12 02:27:39,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:27:39,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 330 transitions. [2023-11-12 02:27:39,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670103092783505 [2023-11-12 02:27:39,635 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 330 transitions. [2023-11-12 02:27:39,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 330 transitions. [2023-11-12 02:27:39,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:39,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 330 transitions. [2023-11-12 02:27:39,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states 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 02:27:39,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states 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 02:27:39,656 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states 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 02:27:39,658 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 3 states and 330 transitions. [2023-11-12 02:27:39,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 41 transitions, 197 flow [2023-11-12 02:27:39,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 41 transitions, 175 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-12 02:27:39,667 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 76 flow [2023-11-12 02:27:39,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-11-12 02:27:39,674 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2023-11-12 02:27:39,674 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 76 flow [2023-11-12 02:27:39,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states 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 02:27:39,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:39,675 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 02:27:39,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:27:39,676 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 02:27:39,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:39,677 INFO L85 PathProgramCache]: Analyzing trace with hash 832894792, now seen corresponding path program 1 times [2023-11-12 02:27:39,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:39,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014917663] [2023-11-12 02:27:39,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:39,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:39,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:39,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014917663] [2023-11-12 02:27:39,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014917663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:39,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:39,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:27:39,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306136610] [2023-11-12 02:27:39,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:39,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:27:39,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:39,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:27:39,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:27:39,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 194 [2023-11-12 02:27:39,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 0 states have call successors, (0), 0 states 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 02:27:39,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:39,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 194 [2023-11-12 02:27:39,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:40,274 INFO L124 PetriNetUnfolderBase]: 535/823 cut-off events. [2023-11-12 02:27:40,275 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2023-11-12 02:27:40,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1905 conditions, 823 events. 535/823 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3197 event pairs, 158 based on Foata normal form. 86/909 useless extension candidates. Maximal degree in co-relation 562. Up to 394 conditions per place. [2023-11-12 02:27:40,281 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 52 selfloop transitions, 6 changer transitions 5/63 dead transitions. [2023-11-12 02:27:40,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 63 transitions, 301 flow [2023-11-12 02:27:40,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:27:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:27:40,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 507 transitions. [2023-11-12 02:27:40,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522680412371134 [2023-11-12 02:27:40,286 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 507 transitions. [2023-11-12 02:27:40,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 507 transitions. [2023-11-12 02:27:40,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:40,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 507 transitions. [2023-11-12 02:27:40,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 101.4) internal successors, (507), 5 states have internal predecessors, (507), 0 states have call successors, (0), 0 states 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 02:27:40,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states 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 02:27:40,293 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states 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 02:27:40,294 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 76 flow. Second operand 5 states and 507 transitions. [2023-11-12 02:27:40,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 63 transitions, 301 flow [2023-11-12 02:27:40,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 63 transitions, 295 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:27:40,297 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 127 flow [2023-11-12 02:27:40,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-11-12 02:27:40,298 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-11-12 02:27:40,298 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 127 flow [2023-11-12 02:27:40,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 0 states have call successors, (0), 0 states 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 02:27:40,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:40,299 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 02:27:40,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:27:40,299 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 02:27:40,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:40,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2070250382, now seen corresponding path program 2 times [2023-11-12 02:27:40,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:40,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174083766] [2023-11-12 02:27:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:40,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:40,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:40,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174083766] [2023-11-12 02:27:40,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174083766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:40,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:40,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:27:40,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059329058] [2023-11-12 02:27:40,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:40,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:27:40,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:40,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:27:40,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:27:40,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 194 [2023-11-12 02:27:40,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 02:27:40,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:40,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 194 [2023-11-12 02:27:40,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:40,688 INFO L124 PetriNetUnfolderBase]: 605/931 cut-off events. [2023-11-12 02:27:40,688 INFO L125 PetriNetUnfolderBase]: For 1128/1128 co-relation queries the response was YES. [2023-11-12 02:27:40,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2940 conditions, 931 events. 605/931 cut-off events. For 1128/1128 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3557 event pairs, 167 based on Foata normal form. 38/969 useless extension candidates. Maximal degree in co-relation 819. Up to 538 conditions per place. [2023-11-12 02:27:40,696 INFO L140 encePairwiseOnDemand]: 189/194 looper letters, 47 selfloop transitions, 5 changer transitions 9/61 dead transitions. [2023-11-12 02:27:40,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 61 transitions, 373 flow [2023-11-12 02:27:40,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:27:40,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:27:40,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 422 transitions. [2023-11-12 02:27:40,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5438144329896907 [2023-11-12 02:27:40,699 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 422 transitions. [2023-11-12 02:27:40,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 422 transitions. [2023-11-12 02:27:40,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:40,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 422 transitions. [2023-11-12 02:27:40,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 02:27:40,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 02:27:40,705 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 02:27:40,705 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 127 flow. Second operand 4 states and 422 transitions. [2023-11-12 02:27:40,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 61 transitions, 373 flow [2023-11-12 02:27:40,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 361 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-12 02:27:40,710 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 153 flow [2023-11-12 02:27:40,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=153, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-12 02:27:40,712 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2023-11-12 02:27:40,712 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 153 flow [2023-11-12 02:27:40,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 02:27:40,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:40,713 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 02:27:40,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:27:40,713 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 02:27:40,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:40,714 INFO L85 PathProgramCache]: Analyzing trace with hash -970745673, now seen corresponding path program 1 times [2023-11-12 02:27:40,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:40,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006767957] [2023-11-12 02:27:40,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:40,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:40,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:40,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006767957] [2023-11-12 02:27:40,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006767957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:40,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:40,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:27:40,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471805530] [2023-11-12 02:27:40,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:40,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:27:40,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:40,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:27:40,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:27:40,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 194 [2023-11-12 02:27:40,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 153 flow. Second operand has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states 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 02:27:40,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:40,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 194 [2023-11-12 02:27:40,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:41,133 INFO L124 PetriNetUnfolderBase]: 671/1021 cut-off events. [2023-11-12 02:27:41,133 INFO L125 PetriNetUnfolderBase]: For 2104/2104 co-relation queries the response was YES. [2023-11-12 02:27:41,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3504 conditions, 1021 events. 671/1021 cut-off events. For 2104/2104 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3967 event pairs, 314 based on Foata normal form. 16/1037 useless extension candidates. Maximal degree in co-relation 1813. Up to 801 conditions per place. [2023-11-12 02:27:41,143 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 50 selfloop transitions, 12 changer transitions 3/65 dead transitions. [2023-11-12 02:27:41,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 65 transitions, 466 flow [2023-11-12 02:27:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:27:41,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:27:41,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 493 transitions. [2023-11-12 02:27:41,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082474226804123 [2023-11-12 02:27:41,146 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 493 transitions. [2023-11-12 02:27:41,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 493 transitions. [2023-11-12 02:27:41,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:41,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 493 transitions. [2023-11-12 02:27:41,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states 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 02:27:41,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states 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 02:27:41,153 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states 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 02:27:41,153 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 153 flow. Second operand 5 states and 493 transitions. [2023-11-12 02:27:41,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 65 transitions, 466 flow [2023-11-12 02:27:41,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 454 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-12 02:27:41,161 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 248 flow [2023-11-12 02:27:41,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-11-12 02:27:41,162 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2023-11-12 02:27:41,162 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 248 flow [2023-11-12 02:27:41,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states 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 02:27:41,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:41,163 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 02:27:41,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:27:41,164 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 02:27:41,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:41,164 INFO L85 PathProgramCache]: Analyzing trace with hash 135995945, now seen corresponding path program 2 times [2023-11-12 02:27:41,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:41,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540995296] [2023-11-12 02:27:41,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:41,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:41,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:41,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540995296] [2023-11-12 02:27:41,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540995296] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:41,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:41,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:27:41,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008204449] [2023-11-12 02:27:41,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:41,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:27:41,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:41,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:27:41,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:27:41,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 194 [2023-11-12 02:27:41,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 0 states have call successors, (0), 0 states 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 02:27:41,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:41,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 194 [2023-11-12 02:27:41,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:41,721 INFO L124 PetriNetUnfolderBase]: 836/1302 cut-off events. [2023-11-12 02:27:41,721 INFO L125 PetriNetUnfolderBase]: For 3669/3669 co-relation queries the response was YES. [2023-11-12 02:27:41,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5158 conditions, 1302 events. 836/1302 cut-off events. For 3669/3669 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5639 event pairs, 254 based on Foata normal form. 62/1364 useless extension candidates. Maximal degree in co-relation 3940. Up to 684 conditions per place. [2023-11-12 02:27:41,735 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 60 selfloop transitions, 12 changer transitions 7/79 dead transitions. [2023-11-12 02:27:41,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 79 transitions, 606 flow [2023-11-12 02:27:41,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:27:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:27:41,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 503 transitions. [2023-11-12 02:27:41,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185567010309279 [2023-11-12 02:27:41,739 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 503 transitions. [2023-11-12 02:27:41,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 503 transitions. [2023-11-12 02:27:41,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:41,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 503 transitions. [2023-11-12 02:27:41,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 02:27:41,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states 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 02:27:41,746 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states 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 02:27:41,746 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 248 flow. Second operand 5 states and 503 transitions. [2023-11-12 02:27:41,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 79 transitions, 606 flow [2023-11-12 02:27:41,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 79 transitions, 572 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-12 02:27:41,759 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 325 flow [2023-11-12 02:27:41,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=325, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-11-12 02:27:41,763 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2023-11-12 02:27:41,764 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 325 flow [2023-11-12 02:27:41,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 0 states have call successors, (0), 0 states 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 02:27:41,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:41,767 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 02:27:41,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:27:41,767 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 02:27:41,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:41,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1477589782, now seen corresponding path program 3 times [2023-11-12 02:27:41,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:41,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010186510] [2023-11-12 02:27:41,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:41,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:41,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:41,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010186510] [2023-11-12 02:27:41,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010186510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:41,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:41,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:27:41,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366157745] [2023-11-12 02:27:41,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:41,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:27:41,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:41,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:27:41,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:27:41,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 194 [2023-11-12 02:27:41,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 325 flow. Second operand has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 02:27:41,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:41,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 194 [2023-11-12 02:27:41,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:42,256 INFO L124 PetriNetUnfolderBase]: 918/1424 cut-off events. [2023-11-12 02:27:42,256 INFO L125 PetriNetUnfolderBase]: For 6341/6341 co-relation queries the response was YES. [2023-11-12 02:27:42,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6537 conditions, 1424 events. 918/1424 cut-off events. For 6341/6341 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6099 event pairs, 306 based on Foata normal form. 44/1468 useless extension candidates. Maximal degree in co-relation 4788. Up to 960 conditions per place. [2023-11-12 02:27:42,274 INFO L140 encePairwiseOnDemand]: 189/194 looper letters, 56 selfloop transitions, 8 changer transitions 17/81 dead transitions. [2023-11-12 02:27:42,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 81 transitions, 754 flow [2023-11-12 02:27:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:27:42,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:27:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 420 transitions. [2023-11-12 02:27:42,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412371134020618 [2023-11-12 02:27:42,278 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 420 transitions. [2023-11-12 02:27:42,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 420 transitions. [2023-11-12 02:27:42,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:42,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 420 transitions. [2023-11-12 02:27:42,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 02:27:42,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 02:27:42,283 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 02:27:42,284 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 325 flow. Second operand 4 states and 420 transitions. [2023-11-12 02:27:42,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 81 transitions, 754 flow [2023-11-12 02:27:42,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 81 transitions, 716 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-11-12 02:27:42,298 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 344 flow [2023-11-12 02:27:42,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-11-12 02:27:42,301 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2023-11-12 02:27:42,301 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 344 flow [2023-11-12 02:27:42,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 02:27:42,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:42,302 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 02:27:42,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:27:42,303 INFO L420 AbstractCegarLoop]: === Iteration 7 === 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 02:27:42,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:42,303 INFO L85 PathProgramCache]: Analyzing trace with hash 19357679, now seen corresponding path program 3 times [2023-11-12 02:27:42,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:42,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997106304] [2023-11-12 02:27:42,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:42,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:42,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:42,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997106304] [2023-11-12 02:27:42,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997106304] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:42,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:42,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:27:42,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129066826] [2023-11-12 02:27:42,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:42,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:27:42,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:42,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:27:42,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:27:42,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 194 [2023-11-12 02:27:42,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states 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 02:27:42,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:42,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 194 [2023-11-12 02:27:42,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:42,868 INFO L124 PetriNetUnfolderBase]: 977/1503 cut-off events. [2023-11-12 02:27:42,868 INFO L125 PetriNetUnfolderBase]: For 7072/7072 co-relation queries the response was YES. [2023-11-12 02:27:42,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6997 conditions, 1503 events. 977/1503 cut-off events. For 7072/7072 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6441 event pairs, 406 based on Foata normal form. 16/1519 useless extension candidates. Maximal degree in co-relation 4146. Up to 1107 conditions per place. [2023-11-12 02:27:42,885 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 55 selfloop transitions, 23 changer transitions 9/87 dead transitions. [2023-11-12 02:27:42,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 87 transitions, 909 flow [2023-11-12 02:27:42,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:27:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:27:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 489 transitions. [2023-11-12 02:27:42,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041237113402062 [2023-11-12 02:27:42,888 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 489 transitions. [2023-11-12 02:27:42,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 489 transitions. [2023-11-12 02:27:42,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:42,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 489 transitions. [2023-11-12 02:27:42,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 97.8) internal successors, (489), 5 states have internal predecessors, (489), 0 states have call successors, (0), 0 states 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 02:27:42,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states 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 02:27:42,894 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states 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 02:27:42,894 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 344 flow. Second operand 5 states and 489 transitions. [2023-11-12 02:27:42,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 87 transitions, 909 flow [2023-11-12 02:27:42,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 87 transitions, 897 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:27:42,908 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 556 flow [2023-11-12 02:27:42,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=556, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-11-12 02:27:42,912 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 26 predicate places. [2023-11-12 02:27:42,912 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 556 flow [2023-11-12 02:27:42,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states 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 02:27:42,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:42,913 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 02:27:42,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:27:42,914 INFO L420 AbstractCegarLoop]: === Iteration 8 === 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 02:27:42,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:42,915 INFO L85 PathProgramCache]: Analyzing trace with hash -307816688, now seen corresponding path program 1 times [2023-11-12 02:27:42,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:42,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013938029] [2023-11-12 02:27:42,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:42,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:42,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:43,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:43,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013938029] [2023-11-12 02:27:43,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013938029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:43,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:43,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:27:43,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989080812] [2023-11-12 02:27:43,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:43,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:27:43,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:43,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:27:43,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:27:43,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 194 [2023-11-12 02:27:43,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 556 flow. Second operand has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 02:27:43,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:43,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 194 [2023-11-12 02:27:43,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:43,398 INFO L124 PetriNetUnfolderBase]: 953/1439 cut-off events. [2023-11-12 02:27:43,398 INFO L125 PetriNetUnfolderBase]: For 9101/9101 co-relation queries the response was YES. [2023-11-12 02:27:43,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7878 conditions, 1439 events. 953/1439 cut-off events. For 9101/9101 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5975 event pairs, 356 based on Foata normal form. 48/1487 useless extension candidates. Maximal degree in co-relation 5215. Up to 939 conditions per place. [2023-11-12 02:27:43,416 INFO L140 encePairwiseOnDemand]: 189/194 looper letters, 51 selfloop transitions, 25 changer transitions 13/89 dead transitions. [2023-11-12 02:27:43,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 89 transitions, 1046 flow [2023-11-12 02:27:43,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:27:43,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:27:43,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 414 transitions. [2023-11-12 02:27:43,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335051546391752 [2023-11-12 02:27:43,423 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 414 transitions. [2023-11-12 02:27:43,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 414 transitions. [2023-11-12 02:27:43,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:43,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 414 transitions. [2023-11-12 02:27:43,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 02:27:43,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 02:27:43,428 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 02:27:43,428 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 556 flow. Second operand 4 states and 414 transitions. [2023-11-12 02:27:43,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 89 transitions, 1046 flow [2023-11-12 02:27:43,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 89 transitions, 992 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-11-12 02:27:43,450 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 656 flow [2023-11-12 02:27:43,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=656, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2023-11-12 02:27:43,453 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2023-11-12 02:27:43,453 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 656 flow [2023-11-12 02:27:43,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 02:27:43,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:43,454 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 02:27:43,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:27:43,454 INFO L420 AbstractCegarLoop]: === Iteration 9 === 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 02:27:43,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:43,455 INFO L85 PathProgramCache]: Analyzing trace with hash -2104768047, now seen corresponding path program 4 times [2023-11-12 02:27:43,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:43,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164153619] [2023-11-12 02:27:43,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:43,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:43,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:43,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164153619] [2023-11-12 02:27:43,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164153619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:43,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:43,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:27:43,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249575389] [2023-11-12 02:27:43,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:43,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:27:43,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:43,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:27:43,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:27:43,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 194 [2023-11-12 02:27:43,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 656 flow. Second operand has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 02:27:43,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:43,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 194 [2023-11-12 02:27:43,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:43,905 INFO L124 PetriNetUnfolderBase]: 892/1313 cut-off events. [2023-11-12 02:27:43,905 INFO L125 PetriNetUnfolderBase]: For 10378/10378 co-relation queries the response was YES. [2023-11-12 02:27:43,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7647 conditions, 1313 events. 892/1313 cut-off events. For 10378/10378 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5147 event pairs, 303 based on Foata normal form. 44/1357 useless extension candidates. Maximal degree in co-relation 5111. Up to 947 conditions per place. [2023-11-12 02:27:43,928 INFO L140 encePairwiseOnDemand]: 189/194 looper letters, 73 selfloop transitions, 28 changer transitions 0/101 dead transitions. [2023-11-12 02:27:43,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 101 transitions, 1309 flow [2023-11-12 02:27:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:27:43,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:27:43,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 416 transitions. [2023-11-12 02:27:43,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5360824742268041 [2023-11-12 02:27:43,931 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 416 transitions. [2023-11-12 02:27:43,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 416 transitions. [2023-11-12 02:27:43,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:43,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 416 transitions. [2023-11-12 02:27:43,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states 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 02:27:43,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 02:27:43,936 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 02:27:43,936 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 656 flow. Second operand 4 states and 416 transitions. [2023-11-12 02:27:43,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 101 transitions, 1309 flow [2023-11-12 02:27:43,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 101 transitions, 1259 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-11-12 02:27:43,954 INFO L231 Difference]: Finished difference. Result has 55 places, 73 transitions, 947 flow [2023-11-12 02:27:43,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=947, PETRI_PLACES=55, PETRI_TRANSITIONS=73} [2023-11-12 02:27:43,955 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 26 predicate places. [2023-11-12 02:27:43,955 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 73 transitions, 947 flow [2023-11-12 02:27:43,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 02:27:43,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:43,956 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 02:27:43,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:27:43,956 INFO L420 AbstractCegarLoop]: === Iteration 10 === 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 02:27:43,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:43,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1675376965, now seen corresponding path program 5 times [2023-11-12 02:27:43,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:43,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146481567] [2023-11-12 02:27:43,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:43,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:44,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:44,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146481567] [2023-11-12 02:27:44,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146481567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:44,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:44,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:27:44,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62558530] [2023-11-12 02:27:44,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:44,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:27:44,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:44,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:27:44,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:27:44,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 194 [2023-11-12 02:27:44,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 73 transitions, 947 flow. Second operand has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 02:27:44,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:44,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 194 [2023-11-12 02:27:44,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:44,457 INFO L124 PetriNetUnfolderBase]: 942/1361 cut-off events. [2023-11-12 02:27:44,457 INFO L125 PetriNetUnfolderBase]: For 11741/11741 co-relation queries the response was YES. [2023-11-12 02:27:44,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8536 conditions, 1361 events. 942/1361 cut-off events. For 11741/11741 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5250 event pairs, 142 based on Foata normal form. 36/1397 useless extension candidates. Maximal degree in co-relation 5769. Up to 962 conditions per place. [2023-11-12 02:27:44,478 INFO L140 encePairwiseOnDemand]: 189/194 looper letters, 75 selfloop transitions, 24 changer transitions 1/100 dead transitions. [2023-11-12 02:27:44,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 100 transitions, 1387 flow [2023-11-12 02:27:44,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:27:44,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:27:44,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 416 transitions. [2023-11-12 02:27:44,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5360824742268041 [2023-11-12 02:27:44,481 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 416 transitions. [2023-11-12 02:27:44,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 416 transitions. [2023-11-12 02:27:44,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:44,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 416 transitions. [2023-11-12 02:27:44,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states 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 02:27:44,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 02:27:44,486 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 02:27:44,486 INFO L175 Difference]: Start difference. First operand has 55 places, 73 transitions, 947 flow. Second operand 4 states and 416 transitions. [2023-11-12 02:27:44,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 100 transitions, 1387 flow [2023-11-12 02:27:44,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 100 transitions, 1297 flow, removed 27 selfloop flow, removed 2 redundant places. [2023-11-12 02:27:44,507 INFO L231 Difference]: Finished difference. Result has 58 places, 77 transitions, 1008 flow [2023-11-12 02:27:44,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1008, PETRI_PLACES=58, PETRI_TRANSITIONS=77} [2023-11-12 02:27:44,508 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2023-11-12 02:27:44,509 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 77 transitions, 1008 flow [2023-11-12 02:27:44,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 02:27:44,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:44,509 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 02:27:44,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:27:44,510 INFO L420 AbstractCegarLoop]: === Iteration 11 === 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 02:27:44,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:44,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1618129123, now seen corresponding path program 1 times [2023-11-12 02:27:44,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:44,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60275590] [2023-11-12 02:27:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:44,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:27:44,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:44,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60275590] [2023-11-12 02:27:44,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60275590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:44,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:44,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:27:44,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799504523] [2023-11-12 02:27:44,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:44,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:27:44,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:44,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:27:44,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:27:44,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 194 [2023-11-12 02:27:44,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 77 transitions, 1008 flow. Second operand has 5 states, 5 states have (on average 92.2) internal successors, (461), 5 states have internal predecessors, (461), 0 states have call successors, (0), 0 states 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 02:27:44,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:44,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 194 [2023-11-12 02:27:44,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:45,070 INFO L124 PetriNetUnfolderBase]: 1102/1575 cut-off events. [2023-11-12 02:27:45,071 INFO L125 PetriNetUnfolderBase]: For 14597/14597 co-relation queries the response was YES. [2023-11-12 02:27:45,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9776 conditions, 1575 events. 1102/1575 cut-off events. For 14597/14597 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5986 event pairs, 273 based on Foata normal form. 28/1603 useless extension candidates. Maximal degree in co-relation 6685. Up to 1155 conditions per place. [2023-11-12 02:27:45,103 INFO L140 encePairwiseOnDemand]: 188/194 looper letters, 88 selfloop transitions, 30 changer transitions 4/122 dead transitions. [2023-11-12 02:27:45,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 122 transitions, 1786 flow [2023-11-12 02:27:45,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:27:45,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:27:45,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 487 transitions. [2023-11-12 02:27:45,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020618556701031 [2023-11-12 02:27:45,107 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 487 transitions. [2023-11-12 02:27:45,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 487 transitions. [2023-11-12 02:27:45,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:45,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 487 transitions. [2023-11-12 02:27:45,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 97.4) internal successors, (487), 5 states have internal predecessors, (487), 0 states have call successors, (0), 0 states 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 02:27:45,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states 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 02:27:45,114 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states 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 02:27:45,114 INFO L175 Difference]: Start difference. First operand has 58 places, 77 transitions, 1008 flow. Second operand 5 states and 487 transitions. [2023-11-12 02:27:45,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 122 transitions, 1786 flow [2023-11-12 02:27:45,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 122 transitions, 1711 flow, removed 26 selfloop flow, removed 1 redundant places. [2023-11-12 02:27:45,139 INFO L231 Difference]: Finished difference. Result has 63 places, 91 transitions, 1307 flow [2023-11-12 02:27:45,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=949, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1307, PETRI_PLACES=63, PETRI_TRANSITIONS=91} [2023-11-12 02:27:45,140 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2023-11-12 02:27:45,141 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 91 transitions, 1307 flow [2023-11-12 02:27:45,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.2) internal successors, (461), 5 states have internal predecessors, (461), 0 states have call successors, (0), 0 states 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 02:27:45,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:45,141 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 02:27:45,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 02:27:45,142 INFO L420 AbstractCegarLoop]: === Iteration 12 === 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 02:27:45,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:45,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1416750447, now seen corresponding path program 2 times [2023-11-12 02:27:45,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:45,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763073134] [2023-11-12 02:27:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:45,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:27:45,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:45,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763073134] [2023-11-12 02:27:45,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763073134] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:45,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:45,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:27:45,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250088063] [2023-11-12 02:27:45,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:45,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:27:45,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:45,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:27:45,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:27:45,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 194 [2023-11-12 02:27:45,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 91 transitions, 1307 flow. Second operand has 5 states, 5 states have (on average 93.2) internal successors, (466), 5 states have internal predecessors, (466), 0 states have call successors, (0), 0 states 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 02:27:45,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:45,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 194 [2023-11-12 02:27:45,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:45,821 INFO L124 PetriNetUnfolderBase]: 1089/1592 cut-off events. [2023-11-12 02:27:45,821 INFO L125 PetriNetUnfolderBase]: For 17898/17898 co-relation queries the response was YES. [2023-11-12 02:27:45,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10725 conditions, 1592 events. 1089/1592 cut-off events. For 17898/17898 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6324 event pairs, 308 based on Foata normal form. 56/1648 useless extension candidates. Maximal degree in co-relation 6873. Up to 1084 conditions per place. [2023-11-12 02:27:45,847 INFO L140 encePairwiseOnDemand]: 188/194 looper letters, 98 selfloop transitions, 22 changer transitions 7/127 dead transitions. [2023-11-12 02:27:45,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 127 transitions, 1870 flow [2023-11-12 02:27:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:27:45,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:27:45,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 498 transitions. [2023-11-12 02:27:45,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51340206185567 [2023-11-12 02:27:45,851 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 498 transitions. [2023-11-12 02:27:45,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 498 transitions. [2023-11-12 02:27:45,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:45,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 498 transitions. [2023-11-12 02:27:45,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 99.6) internal successors, (498), 5 states have internal predecessors, (498), 0 states have call successors, (0), 0 states 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 02:27:45,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states 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 02:27:45,859 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states 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 02:27:45,859 INFO L175 Difference]: Start difference. First operand has 63 places, 91 transitions, 1307 flow. Second operand 5 states and 498 transitions. [2023-11-12 02:27:45,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 127 transitions, 1870 flow [2023-11-12 02:27:45,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 127 transitions, 1806 flow, removed 32 selfloop flow, removed 1 redundant places. [2023-11-12 02:27:45,898 INFO L231 Difference]: Finished difference. Result has 67 places, 91 transitions, 1328 flow [2023-11-12 02:27:45,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1328, PETRI_PLACES=67, PETRI_TRANSITIONS=91} [2023-11-12 02:27:45,900 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 38 predicate places. [2023-11-12 02:27:45,900 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 91 transitions, 1328 flow [2023-11-12 02:27:45,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.2) internal successors, (466), 5 states have internal predecessors, (466), 0 states have call successors, (0), 0 states 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 02:27:45,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:45,901 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 02:27:45,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 02:27:45,902 INFO L420 AbstractCegarLoop]: === Iteration 13 === 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 02:27:45,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:45,903 INFO L85 PathProgramCache]: Analyzing trace with hash -703119311, now seen corresponding path program 3 times [2023-11-12 02:27:45,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:45,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590234835] [2023-11-12 02:27:45,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:45,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:27:46,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:46,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590234835] [2023-11-12 02:27:46,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590234835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:46,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133769651] [2023-11-12 02:27:46,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:27:46,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:46,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:46,083 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:46,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:27:46,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:27:46,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:27:46,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:27:46,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:27:46,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:27:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:27:46,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133769651] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:27:46,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:27:46,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-11-12 02:27:46,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71380586] [2023-11-12 02:27:46,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:27:46,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:27:46,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:46,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:27:46,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:27:46,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 194 [2023-11-12 02:27:46,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 91 transitions, 1328 flow. Second operand has 7 states, 7 states have (on average 93.0) internal successors, (651), 7 states have internal predecessors, (651), 0 states have call successors, (0), 0 states 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 02:27:46,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:46,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 194 [2023-11-12 02:27:46,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:47,007 INFO L124 PetriNetUnfolderBase]: 1394/2025 cut-off events. [2023-11-12 02:27:47,007 INFO L125 PetriNetUnfolderBase]: For 24876/24876 co-relation queries the response was YES. [2023-11-12 02:27:47,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14417 conditions, 2025 events. 1394/2025 cut-off events. For 24876/24876 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 8386 event pairs, 271 based on Foata normal form. 24/2049 useless extension candidates. Maximal degree in co-relation 9551. Up to 1029 conditions per place. [2023-11-12 02:27:47,031 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 144 selfloop transitions, 72 changer transitions 3/219 dead transitions. [2023-11-12 02:27:47,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 219 transitions, 3363 flow [2023-11-12 02:27:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:27:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:27:47,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 886 transitions. [2023-11-12 02:27:47,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074455899198167 [2023-11-12 02:27:47,036 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 886 transitions. [2023-11-12 02:27:47,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 886 transitions. [2023-11-12 02:27:47,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:47,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 886 transitions. [2023-11-12 02:27:47,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 98.44444444444444) internal successors, (886), 9 states have internal predecessors, (886), 0 states have call successors, (0), 0 states 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 02:27:47,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 194.0) internal successors, (1940), 10 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states 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 02:27:47,044 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 194.0) internal successors, (1940), 10 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states 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 02:27:47,044 INFO L175 Difference]: Start difference. First operand has 67 places, 91 transitions, 1328 flow. Second operand 9 states and 886 transitions. [2023-11-12 02:27:47,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 219 transitions, 3363 flow [2023-11-12 02:27:47,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 219 transitions, 3233 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-11-12 02:27:47,089 INFO L231 Difference]: Finished difference. Result has 76 places, 139 transitions, 2326 flow [2023-11-12 02:27:47,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2326, PETRI_PLACES=76, PETRI_TRANSITIONS=139} [2023-11-12 02:27:47,090 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 47 predicate places. [2023-11-12 02:27:47,090 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 139 transitions, 2326 flow [2023-11-12 02:27:47,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 93.0) internal successors, (651), 7 states have internal predecessors, (651), 0 states have call successors, (0), 0 states 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 02:27:47,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:47,091 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 02:27:47,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:47,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:47,296 INFO L420 AbstractCegarLoop]: === Iteration 14 === 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 02:27:47,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:47,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1312968297, now seen corresponding path program 4 times [2023-11-12 02:27:47,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:47,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157647330] [2023-11-12 02:27:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:47,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:27:47,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:47,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157647330] [2023-11-12 02:27:47,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157647330] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:47,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132531443] [2023-11-12 02:27:47,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:27:47,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:47,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:47,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:47,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:27:47,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:27:47,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:27:47,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:27:47,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:27:47,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:27:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:27:47,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132531443] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:27:47,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:27:47,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2023-11-12 02:27:47,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353687161] [2023-11-12 02:27:47,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:27:47,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:27:47,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:47,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:27:47,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:27:47,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 194 [2023-11-12 02:27:47,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 139 transitions, 2326 flow. Second operand has 9 states, 9 states have (on average 89.22222222222223) internal successors, (803), 9 states have internal predecessors, (803), 0 states have call successors, (0), 0 states 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 02:27:47,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:47,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 194 [2023-11-12 02:27:47,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:48,317 INFO L124 PetriNetUnfolderBase]: 1403/2022 cut-off events. [2023-11-12 02:27:48,317 INFO L125 PetriNetUnfolderBase]: For 28840/28840 co-relation queries the response was YES. [2023-11-12 02:27:48,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15697 conditions, 2022 events. 1403/2022 cut-off events. For 28840/28840 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 8259 event pairs, 208 based on Foata normal form. 36/2058 useless extension candidates. Maximal degree in co-relation 14965. Up to 1083 conditions per place. [2023-11-12 02:27:48,344 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 92 selfloop transitions, 112 changer transitions 1/205 dead transitions. [2023-11-12 02:27:48,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 205 transitions, 3410 flow [2023-11-12 02:27:48,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:27:48,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:27:48,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 941 transitions. [2023-11-12 02:27:48,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850515463917526 [2023-11-12 02:27:48,349 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 941 transitions. [2023-11-12 02:27:48,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 941 transitions. [2023-11-12 02:27:48,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:48,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 941 transitions. [2023-11-12 02:27:48,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 94.1) internal successors, (941), 10 states have internal predecessors, (941), 0 states have call successors, (0), 0 states 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 02:27:48,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 194.0) internal successors, (2134), 11 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states 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 02:27:48,359 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 194.0) internal successors, (2134), 11 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states 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 02:27:48,359 INFO L175 Difference]: Start difference. First operand has 76 places, 139 transitions, 2326 flow. Second operand 10 states and 941 transitions. [2023-11-12 02:27:48,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 205 transitions, 3410 flow [2023-11-12 02:27:48,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 205 transitions, 3264 flow, removed 73 selfloop flow, removed 0 redundant places. [2023-11-12 02:27:48,436 INFO L231 Difference]: Finished difference. Result has 89 places, 158 transitions, 2816 flow [2023-11-12 02:27:48,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=2206, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2816, PETRI_PLACES=89, PETRI_TRANSITIONS=158} [2023-11-12 02:27:48,438 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 60 predicate places. [2023-11-12 02:27:48,438 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 158 transitions, 2816 flow [2023-11-12 02:27:48,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 89.22222222222223) internal successors, (803), 9 states have internal predecessors, (803), 0 states have call successors, (0), 0 states 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 02:27:48,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:48,439 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, 1] [2023-11-12 02:27:48,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:48,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:27:48,645 INFO L420 AbstractCegarLoop]: === Iteration 15 === 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 02:27:48,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:48,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1480028985, now seen corresponding path program 1 times [2023-11-12 02:27:48,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:48,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000911343] [2023-11-12 02:27:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:48,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:48,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:48,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000911343] [2023-11-12 02:27:48,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000911343] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:48,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581093856] [2023-11-12 02:27:48,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:48,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:48,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:48,958 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:48,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:27:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:49,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:27:49,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:49,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:27:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:50,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581093856] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:27:50,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:27:50,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 10 [2023-11-12 02:27:50,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920770670] [2023-11-12 02:27:50,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:27:50,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:27:50,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:50,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:27:50,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:27:50,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 194 [2023-11-12 02:27:50,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 158 transitions, 2816 flow. Second operand has 12 states, 12 states have (on average 96.16666666666667) internal successors, (1154), 12 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states 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 02:27:50,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:50,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 194 [2023-11-12 02:27:50,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:51,221 INFO L124 PetriNetUnfolderBase]: 2030/2947 cut-off events. [2023-11-12 02:27:51,221 INFO L125 PetriNetUnfolderBase]: For 42484/42484 co-relation queries the response was YES. [2023-11-12 02:27:51,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22972 conditions, 2947 events. 2030/2947 cut-off events. For 42484/42484 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 12827 event pairs, 197 based on Foata normal form. 2/2949 useless extension candidates. Maximal degree in co-relation 21837. Up to 2160 conditions per place. [2023-11-12 02:27:51,262 INFO L140 encePairwiseOnDemand]: 189/194 looper letters, 193 selfloop transitions, 74 changer transitions 2/269 dead transitions. [2023-11-12 02:27:51,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 269 transitions, 4528 flow [2023-11-12 02:27:51,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:27:51,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:27:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 930 transitions. [2023-11-12 02:27:51,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5326460481099656 [2023-11-12 02:27:51,267 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 930 transitions. [2023-11-12 02:27:51,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 930 transitions. [2023-11-12 02:27:51,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:51,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 930 transitions. [2023-11-12 02:27:51,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 103.33333333333333) internal successors, (930), 9 states have internal predecessors, (930), 0 states have call successors, (0), 0 states 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 02:27:51,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 194.0) internal successors, (1940), 10 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states 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 02:27:51,277 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 194.0) internal successors, (1940), 10 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states 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 02:27:51,277 INFO L175 Difference]: Start difference. First operand has 89 places, 158 transitions, 2816 flow. Second operand 9 states and 930 transitions. [2023-11-12 02:27:51,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 269 transitions, 4528 flow [2023-11-12 02:27:51,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 269 transitions, 4020 flow, removed 173 selfloop flow, removed 4 redundant places. [2023-11-12 02:27:51,441 INFO L231 Difference]: Finished difference. Result has 96 places, 202 transitions, 3441 flow [2023-11-12 02:27:51,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=2453, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3441, PETRI_PLACES=96, PETRI_TRANSITIONS=202} [2023-11-12 02:27:51,443 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 67 predicate places. [2023-11-12 02:27:51,443 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 202 transitions, 3441 flow [2023-11-12 02:27:51,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 96.16666666666667) internal successors, (1154), 12 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states 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 02:27:51,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:51,446 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, 1] [2023-11-12 02:27:51,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:51,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:27:51,652 INFO L420 AbstractCegarLoop]: === Iteration 16 === 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 02:27:51,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:51,653 INFO L85 PathProgramCache]: Analyzing trace with hash -558997473, now seen corresponding path program 2 times [2023-11-12 02:27:51,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:51,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506997653] [2023-11-12 02:27:51,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:51,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:51,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:51,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506997653] [2023-11-12 02:27:51,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506997653] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:51,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001711248] [2023-11-12 02:27:51,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:27:51,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:51,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:51,937 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:51,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:27:52,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:27:52,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:27:52,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:27:52,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:52,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:27:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:52,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001711248] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:27:52,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:27:52,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 11 [2023-11-12 02:27:52,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349594219] [2023-11-12 02:27:52,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:27:52,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:27:52,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:52,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:27:52,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:27:53,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 194 [2023-11-12 02:27:53,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 202 transitions, 3441 flow. Second operand has 13 states, 13 states have (on average 96.07692307692308) internal successors, (1249), 13 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states 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 02:27:53,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:53,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 194 [2023-11-12 02:27:53,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:53,987 INFO L124 PetriNetUnfolderBase]: 2382/3465 cut-off events. [2023-11-12 02:27:53,987 INFO L125 PetriNetUnfolderBase]: For 45836/45836 co-relation queries the response was YES. [2023-11-12 02:27:54,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26264 conditions, 3465 events. 2382/3465 cut-off events. For 45836/45836 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15437 event pairs, 363 based on Foata normal form. 2/3467 useless extension candidates. Maximal degree in co-relation 25414. Up to 2802 conditions per place. [2023-11-12 02:27:54,029 INFO L140 encePairwiseOnDemand]: 189/194 looper letters, 210 selfloop transitions, 71 changer transitions 2/283 dead transitions. [2023-11-12 02:27:54,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 283 transitions, 4691 flow [2023-11-12 02:27:54,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:27:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:27:54,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 926 transitions. [2023-11-12 02:27:54,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303550973654066 [2023-11-12 02:27:54,034 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 926 transitions. [2023-11-12 02:27:54,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 926 transitions. [2023-11-12 02:27:54,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:54,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 926 transitions. [2023-11-12 02:27:54,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 102.88888888888889) internal successors, (926), 9 states have internal predecessors, (926), 0 states have call successors, (0), 0 states 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 02:27:54,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 194.0) internal successors, (1940), 10 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states 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 02:27:54,043 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 194.0) internal successors, (1940), 10 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states 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 02:27:54,043 INFO L175 Difference]: Start difference. First operand has 96 places, 202 transitions, 3441 flow. Second operand 9 states and 926 transitions. [2023-11-12 02:27:54,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 283 transitions, 4691 flow [2023-11-12 02:27:54,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 283 transitions, 4377 flow, removed 142 selfloop flow, removed 1 redundant places. [2023-11-12 02:27:54,202 INFO L231 Difference]: Finished difference. Result has 106 places, 221 transitions, 3687 flow [2023-11-12 02:27:54,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=3127, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3687, PETRI_PLACES=106, PETRI_TRANSITIONS=221} [2023-11-12 02:27:54,204 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2023-11-12 02:27:54,204 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 221 transitions, 3687 flow [2023-11-12 02:27:54,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 96.07692307692308) internal successors, (1249), 13 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states 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 02:27:54,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:54,205 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, 1] [2023-11-12 02:27:54,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-12 02:27:54,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:27:54,411 INFO L420 AbstractCegarLoop]: === Iteration 17 === 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 02:27:54,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:54,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1771250021, now seen corresponding path program 3 times [2023-11-12 02:27:54,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:54,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612101050] [2023-11-12 02:27:54,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:54,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:54,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:54,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612101050] [2023-11-12 02:27:54,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612101050] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:54,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141834615] [2023-11-12 02:27:54,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:27:54,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:54,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:54,696 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:54,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:27:54,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:27:54,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:27:54,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:27:54,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:55,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:27:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:55,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141834615] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:27:55,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:27:55,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 11 [2023-11-12 02:27:55,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674633846] [2023-11-12 02:27:55,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:27:55,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:27:55,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:55,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:27:55,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:27:55,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 194 [2023-11-12 02:27:55,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 221 transitions, 3687 flow. Second operand has 13 states, 13 states have (on average 96.07692307692308) internal successors, (1249), 13 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states 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 02:27:55,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:55,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 194 [2023-11-12 02:27:55,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:57,042 INFO L124 PetriNetUnfolderBase]: 2994/4369 cut-off events. [2023-11-12 02:27:57,042 INFO L125 PetriNetUnfolderBase]: For 56722/56722 co-relation queries the response was YES. [2023-11-12 02:27:57,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32210 conditions, 4369 events. 2994/4369 cut-off events. For 56722/56722 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20378 event pairs, 587 based on Foata normal form. 2/4371 useless extension candidates. Maximal degree in co-relation 31598. Up to 3610 conditions per place. [2023-11-12 02:27:57,105 INFO L140 encePairwiseOnDemand]: 189/194 looper letters, 253 selfloop transitions, 82 changer transitions 2/337 dead transitions. [2023-11-12 02:27:57,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 337 transitions, 5641 flow [2023-11-12 02:27:57,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:27:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:27:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 926 transitions. [2023-11-12 02:27:57,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303550973654066 [2023-11-12 02:27:57,117 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 926 transitions. [2023-11-12 02:27:57,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 926 transitions. [2023-11-12 02:27:57,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:57,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 926 transitions. [2023-11-12 02:27:57,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 102.88888888888889) internal successors, (926), 9 states have internal predecessors, (926), 0 states have call successors, (0), 0 states 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 02:27:57,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 194.0) internal successors, (1940), 10 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states 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 02:27:57,129 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 194.0) internal successors, (1940), 10 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states 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 02:27:57,130 INFO L175 Difference]: Start difference. First operand has 106 places, 221 transitions, 3687 flow. Second operand 9 states and 926 transitions. [2023-11-12 02:27:57,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 337 transitions, 5641 flow [2023-11-12 02:27:57,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 337 transitions, 5346 flow, removed 116 selfloop flow, removed 2 redundant places. [2023-11-12 02:27:57,560 INFO L231 Difference]: Finished difference. Result has 116 places, 273 transitions, 4637 flow [2023-11-12 02:27:57,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4637, PETRI_PLACES=116, PETRI_TRANSITIONS=273} [2023-11-12 02:27:57,562 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 87 predicate places. [2023-11-12 02:27:57,562 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 273 transitions, 4637 flow [2023-11-12 02:27:57,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 96.07692307692308) internal successors, (1249), 13 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states 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 02:27:57,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:57,563 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, 1] [2023-11-12 02:27:57,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 02:27:57,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-12 02:27:57,775 INFO L420 AbstractCegarLoop]: === Iteration 18 === 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 02:27:57,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:57,776 INFO L85 PathProgramCache]: Analyzing trace with hash 191925733, now seen corresponding path program 4 times [2023-11-12 02:27:57,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:57,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735867766] [2023-11-12 02:27:57,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:57,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:58,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:58,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735867766] [2023-11-12 02:27:58,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735867766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:58,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503046712] [2023-11-12 02:27:58,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:27:58,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:58,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:58,180 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:58,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:27:58,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:27:58,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:27:58,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:27:58,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:58,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:27:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:59,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503046712] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:27:59,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:27:59,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-11-12 02:27:59,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825722406] [2023-11-12 02:27:59,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:27:59,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:27:59,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:59,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:27:59,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:27:59,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 194 [2023-11-12 02:27:59,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 273 transitions, 4637 flow. Second operand has 10 states, 10 states have (on average 96.3) internal successors, (963), 10 states have internal predecessors, (963), 0 states have call successors, (0), 0 states 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 02:27:59,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:59,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 194 [2023-11-12 02:27:59,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:00,344 INFO L124 PetriNetUnfolderBase]: 3314/4839 cut-off events. [2023-11-12 02:28:00,344 INFO L125 PetriNetUnfolderBase]: For 64556/64556 co-relation queries the response was YES. [2023-11-12 02:28:00,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35879 conditions, 4839 events. 3314/4839 cut-off events. For 64556/64556 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22990 event pairs, 739 based on Foata normal form. 2/4841 useless extension candidates. Maximal degree in co-relation 35244. Up to 4220 conditions per place. [2023-11-12 02:28:00,504 INFO L140 encePairwiseOnDemand]: 189/194 looper letters, 269 selfloop transitions, 78 changer transitions 2/349 dead transitions. [2023-11-12 02:28:00,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 349 transitions, 6092 flow [2023-11-12 02:28:00,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:28:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:28:00,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 920 transitions. [2023-11-12 02:28:00,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269186712485682 [2023-11-12 02:28:00,509 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 920 transitions. [2023-11-12 02:28:00,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 920 transitions. [2023-11-12 02:28:00,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:00,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 920 transitions. [2023-11-12 02:28:00,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 102.22222222222223) internal successors, (920), 9 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 02:28:00,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 194.0) internal successors, (1940), 10 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states 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 02:28:00,601 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 194.0) internal successors, (1940), 10 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states 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 02:28:00,601 INFO L175 Difference]: Start difference. First operand has 116 places, 273 transitions, 4637 flow. Second operand 9 states and 920 transitions. [2023-11-12 02:28:00,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 349 transitions, 6092 flow [2023-11-12 02:28:00,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 349 transitions, 5712 flow, removed 190 selfloop flow, removed 0 redundant places. [2023-11-12 02:28:00,836 INFO L231 Difference]: Finished difference. Result has 127 places, 292 transitions, 4881 flow [2023-11-12 02:28:00,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=4257, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4881, PETRI_PLACES=127, PETRI_TRANSITIONS=292} [2023-11-12 02:28:00,837 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 98 predicate places. [2023-11-12 02:28:00,837 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 292 transitions, 4881 flow [2023-11-12 02:28:00,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 96.3) internal successors, (963), 10 states have internal predecessors, (963), 0 states have call successors, (0), 0 states 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 02:28:00,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:00,838 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, 1] [2023-11-12 02:28:00,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:01,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-12 02:28:01,045 INFO L420 AbstractCegarLoop]: === Iteration 19 === 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 02:28:01,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:01,045 INFO L85 PathProgramCache]: Analyzing trace with hash 724966949, now seen corresponding path program 5 times [2023-11-12 02:28:01,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:01,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717332968] [2023-11-12 02:28:01,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:01,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:01,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:01,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717332968] [2023-11-12 02:28:01,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717332968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:28:01,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521106382] [2023-11-12 02:28:01,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:28:01,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:01,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:01,376 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:01,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:28:01,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:28:01,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:28:01,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:28:01,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:01,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:28:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:28:03,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521106382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:28:03,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:28:03,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 11 [2023-11-12 02:28:03,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123958950] [2023-11-12 02:28:03,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:28:03,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:28:03,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:03,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:28:03,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:28:03,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 194 [2023-11-12 02:28:03,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 292 transitions, 4881 flow. Second operand has 13 states, 13 states have (on average 96.07692307692308) internal successors, (1249), 13 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states 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 02:28:03,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:03,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 194 [2023-11-12 02:28:03,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:04,829 INFO L124 PetriNetUnfolderBase]: 3684/5374 cut-off events. [2023-11-12 02:28:04,830 INFO L125 PetriNetUnfolderBase]: For 69924/69924 co-relation queries the response was YES. [2023-11-12 02:28:04,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39274 conditions, 5374 events. 3684/5374 cut-off events. For 69924/69924 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 26089 event pairs, 879 based on Foata normal form. 1/5375 useless extension candidates. Maximal degree in co-relation 38597. Up to 4900 conditions per place. [2023-11-12 02:28:04,912 INFO L140 encePairwiseOnDemand]: 189/194 looper letters, 304 selfloop transitions, 63 changer transitions 1/368 dead transitions. [2023-11-12 02:28:04,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 368 transitions, 6574 flow [2023-11-12 02:28:04,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:28:04,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:28:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 814 transitions. [2023-11-12 02:28:04,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244845360824743 [2023-11-12 02:28:04,920 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 814 transitions. [2023-11-12 02:28:04,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 814 transitions. [2023-11-12 02:28:04,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:04,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 814 transitions. [2023-11-12 02:28:04,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 101.75) internal successors, (814), 8 states have internal predecessors, (814), 0 states have call successors, (0), 0 states 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 02:28:04,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 194.0) internal successors, (1746), 9 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states 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 02:28:04,930 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 194.0) internal successors, (1746), 9 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states 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 02:28:04,931 INFO L175 Difference]: Start difference. First operand has 127 places, 292 transitions, 4881 flow. Second operand 8 states and 814 transitions. [2023-11-12 02:28:04,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 368 transitions, 6574 flow [2023-11-12 02:28:05,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 368 transitions, 6258 flow, removed 124 selfloop flow, removed 2 redundant places. [2023-11-12 02:28:05,297 INFO L231 Difference]: Finished difference. Result has 135 places, 325 transitions, 5470 flow [2023-11-12 02:28:05,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=4565, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5470, PETRI_PLACES=135, PETRI_TRANSITIONS=325} [2023-11-12 02:28:05,298 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 106 predicate places. [2023-11-12 02:28:05,298 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 325 transitions, 5470 flow [2023-11-12 02:28:05,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 96.07692307692308) internal successors, (1249), 13 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states 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 02:28:05,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:05,299 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, 1] [2023-11-12 02:28:05,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-12 02:28:05,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:05,502 INFO L420 AbstractCegarLoop]: === Iteration 20 === 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 02:28:05,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:05,503 INFO L85 PathProgramCache]: Analyzing trace with hash 292785519, now seen corresponding path program 6 times [2023-11-12 02:28:05,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:05,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227043581] [2023-11-12 02:28:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:05,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:05,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:05,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227043581] [2023-11-12 02:28:05,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227043581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:28:05,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141159732] [2023-11-12 02:28:05,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:28:05,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:05,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:05,749 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:05,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:28:05,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-12 02:28:05,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:28:05,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:28:05,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:06,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:28:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:07,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141159732] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:28:07,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:28:07,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 11 [2023-11-12 02:28:07,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291694703] [2023-11-12 02:28:07,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:28:07,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:28:07,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:07,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:28:07,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:28:07,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 194 [2023-11-12 02:28:07,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 325 transitions, 5470 flow. Second operand has 13 states, 13 states have (on average 96.07692307692308) internal successors, (1249), 13 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states 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 02:28:07,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:07,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 194 [2023-11-12 02:28:07,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:09,244 INFO L124 PetriNetUnfolderBase]: 3976/5803 cut-off events. [2023-11-12 02:28:09,244 INFO L125 PetriNetUnfolderBase]: For 78149/78149 co-relation queries the response was YES. [2023-11-12 02:28:09,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42509 conditions, 5803 events. 3976/5803 cut-off events. For 78149/78149 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 28571 event pairs, 1019 based on Foata normal form. 1/5804 useless extension candidates. Maximal degree in co-relation 41835. Up to 5289 conditions per place. [2023-11-12 02:28:09,312 INFO L140 encePairwiseOnDemand]: 189/194 looper letters, 322 selfloop transitions, 63 changer transitions 1/386 dead transitions. [2023-11-12 02:28:09,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 386 transitions, 6929 flow [2023-11-12 02:28:09,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:28:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:28:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 816 transitions. [2023-11-12 02:28:09,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257731958762887 [2023-11-12 02:28:09,316 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 816 transitions. [2023-11-12 02:28:09,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 816 transitions. [2023-11-12 02:28:09,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:09,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 816 transitions. [2023-11-12 02:28:09,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 102.0) internal successors, (816), 8 states have internal predecessors, (816), 0 states have call successors, (0), 0 states 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 02:28:09,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 194.0) internal successors, (1746), 9 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states 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 02:28:09,325 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 194.0) internal successors, (1746), 9 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states 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 02:28:09,325 INFO L175 Difference]: Start difference. First operand has 135 places, 325 transitions, 5470 flow. Second operand 8 states and 816 transitions. [2023-11-12 02:28:09,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 386 transitions, 6929 flow [2023-11-12 02:28:09,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 386 transitions, 6563 flow, removed 153 selfloop flow, removed 2 redundant places. [2023-11-12 02:28:09,688 INFO L231 Difference]: Finished difference. Result has 142 places, 341 transitions, 5687 flow [2023-11-12 02:28:09,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=5104, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5687, PETRI_PLACES=142, PETRI_TRANSITIONS=341} [2023-11-12 02:28:09,689 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 113 predicate places. [2023-11-12 02:28:09,690 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 341 transitions, 5687 flow [2023-11-12 02:28:09,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 96.07692307692308) internal successors, (1249), 13 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states 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 02:28:09,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:09,691 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:28:09,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:09,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:09,897 INFO L420 AbstractCegarLoop]: === Iteration 21 === 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 02:28:09,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:09,897 INFO L85 PathProgramCache]: Analyzing trace with hash 659214886, now seen corresponding path program 7 times [2023-11-12 02:28:09,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:09,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521325207] [2023-11-12 02:28:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:09,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:28:10,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:10,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521325207] [2023-11-12 02:28:10,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521325207] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:28:10,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919531] [2023-11-12 02:28:10,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:28:10,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:10,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:10,094 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:10,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:28:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:10,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:28:10,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:28:10,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:28:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:28:10,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:28:10,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:28:10,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-11-12 02:28:10,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320923707] [2023-11-12 02:28:10,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:28:10,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:28:10,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:10,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:28:10,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:28:10,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 194 [2023-11-12 02:28:10,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 341 transitions, 5687 flow. Second operand has 12 states, 12 states have (on average 92.41666666666667) internal successors, (1109), 12 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states 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 02:28:10,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:10,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 194 [2023-11-12 02:28:10,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:13,170 INFO L124 PetriNetUnfolderBase]: 6067/8710 cut-off events. [2023-11-12 02:28:13,171 INFO L125 PetriNetUnfolderBase]: For 131925/131925 co-relation queries the response was YES. [2023-11-12 02:28:13,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63194 conditions, 8710 events. 6067/8710 cut-off events. For 131925/131925 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44287 event pairs, 553 based on Foata normal form. 68/8778 useless extension candidates. Maximal degree in co-relation 61884. Up to 2709 conditions per place. [2023-11-12 02:28:13,300 INFO L140 encePairwiseOnDemand]: 188/194 looper letters, 657 selfloop transitions, 156 changer transitions 0/813 dead transitions. [2023-11-12 02:28:13,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 813 transitions, 14438 flow [2023-11-12 02:28:13,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:28:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-12 02:28:13,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1302 transitions. [2023-11-12 02:28:13,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162569389373514 [2023-11-12 02:28:13,306 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1302 transitions. [2023-11-12 02:28:13,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1302 transitions. [2023-11-12 02:28:13,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:13,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1302 transitions. [2023-11-12 02:28:13,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 100.15384615384616) internal successors, (1302), 13 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states 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 02:28:13,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 194.0) internal successors, (2716), 14 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states 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 02:28:13,319 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 194.0) internal successors, (2716), 14 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states 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 02:28:13,320 INFO L175 Difference]: Start difference. First operand has 142 places, 341 transitions, 5687 flow. Second operand 13 states and 1302 transitions. [2023-11-12 02:28:13,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 813 transitions, 14438 flow [2023-11-12 02:28:13,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 813 transitions, 13523 flow, removed 443 selfloop flow, removed 1 redundant places. [2023-11-12 02:28:13,907 INFO L231 Difference]: Finished difference. Result has 160 places, 427 transitions, 7169 flow [2023-11-12 02:28:13,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=5363, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7169, PETRI_PLACES=160, PETRI_TRANSITIONS=427} [2023-11-12 02:28:13,909 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 131 predicate places. [2023-11-12 02:28:13,909 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 427 transitions, 7169 flow [2023-11-12 02:28:13,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 92.41666666666667) internal successors, (1109), 12 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states 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 02:28:13,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:13,910 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:28:13,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:14,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-12 02:28:14,117 INFO L420 AbstractCegarLoop]: === Iteration 22 === 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 02:28:14,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:14,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1713350985, now seen corresponding path program 8 times [2023-11-12 02:28:14,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:14,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650578986] [2023-11-12 02:28:14,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:14,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:28:14,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:14,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650578986] [2023-11-12 02:28:14,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650578986] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:28:14,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687935053] [2023-11-12 02:28:14,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:28:14,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:14,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:14,397 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:14,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:28:14,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:28:14,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:28:14,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:28:14,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:28:14,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:28:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:28:14,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687935053] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:28:14,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:28:14,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-12 02:28:14,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067913754] [2023-11-12 02:28:14,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:28:14,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:28:14,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:14,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:28:14,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:28:14,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 194 [2023-11-12 02:28:14,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 427 transitions, 7169 flow. Second operand has 16 states, 16 states have (on average 90.25) internal successors, (1444), 16 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 02:28:14,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:14,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 194 [2023-11-12 02:28:14,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:18,744 INFO L124 PetriNetUnfolderBase]: 6982/9879 cut-off events. [2023-11-12 02:28:18,745 INFO L125 PetriNetUnfolderBase]: For 171140/171140 co-relation queries the response was YES. [2023-11-12 02:28:18,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77680 conditions, 9879 events. 6982/9879 cut-off events. For 171140/171140 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 49261 event pairs, 1726 based on Foata normal form. 104/9983 useless extension candidates. Maximal degree in co-relation 76044. Up to 7160 conditions per place. [2023-11-12 02:28:18,909 INFO L140 encePairwiseOnDemand]: 187/194 looper letters, 529 selfloop transitions, 289 changer transitions 0/818 dead transitions. [2023-11-12 02:28:18,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 818 transitions, 14709 flow [2023-11-12 02:28:18,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:28:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-12 02:28:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1661 transitions. [2023-11-12 02:28:18,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5036385688295937 [2023-11-12 02:28:18,913 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1661 transitions. [2023-11-12 02:28:18,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1661 transitions. [2023-11-12 02:28:18,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:18,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1661 transitions. [2023-11-12 02:28:18,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 97.70588235294117) internal successors, (1661), 17 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states 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 02:28:18,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 194.0) internal successors, (3492), 18 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states 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 02:28:18,927 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 194.0) internal successors, (3492), 18 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states 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 02:28:18,928 INFO L175 Difference]: Start difference. First operand has 160 places, 427 transitions, 7169 flow. Second operand 17 states and 1661 transitions. [2023-11-12 02:28:18,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 818 transitions, 14709 flow [2023-11-12 02:28:20,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 818 transitions, 14116 flow, removed 269 selfloop flow, removed 1 redundant places. [2023-11-12 02:28:20,473 INFO L231 Difference]: Finished difference. Result has 180 places, 588 transitions, 10057 flow [2023-11-12 02:28:20,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=6774, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10057, PETRI_PLACES=180, PETRI_TRANSITIONS=588} [2023-11-12 02:28:20,476 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 151 predicate places. [2023-11-12 02:28:20,476 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 588 transitions, 10057 flow [2023-11-12 02:28:20,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 90.25) internal successors, (1444), 16 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 02:28:20,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:20,477 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:28:20,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:28:20,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-12 02:28:20,684 INFO L420 AbstractCegarLoop]: === Iteration 23 === 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 02:28:20,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:20,684 INFO L85 PathProgramCache]: Analyzing trace with hash 998807077, now seen corresponding path program 9 times [2023-11-12 02:28:20,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:20,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596363133] [2023-11-12 02:28:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:20,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:20,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:20,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596363133] [2023-11-12 02:28:20,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596363133] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:28:20,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629184910] [2023-11-12 02:28:20,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:28:20,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:28:20,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:20,981 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:28:21,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_292019bd-2de5-413d-8fa2-2b00f63eca3a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:28:21,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:28:21,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:28:21,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:28:21,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:28:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:28:21,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:28:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:28:21,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629184910] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:28:21,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:28:21,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2023-11-12 02:28:21,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66510574] [2023-11-12 02:28:21,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:28:21,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:28:21,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:21,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:28:21,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210