./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/clever.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/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_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/clever.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/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_0c21f8e8-a878-46bd-b09f-372f6b8f7349/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 f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:20:07,145 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:20:07,255 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:20:07,262 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:20:07,263 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:20:07,300 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:20:07,302 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:20:07,302 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:20:07,303 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:20:07,308 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:20:07,310 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:20:07,310 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:20:07,311 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:20:07,313 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:20:07,313 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:20:07,314 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:20:07,314 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:20:07,314 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:20:07,315 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:20:07,315 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:20:07,316 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:20:07,316 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:20:07,317 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:20:07,317 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:20:07,317 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:20:07,318 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:20:07,319 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:20:07,319 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:20:07,320 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:20:07,320 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:20:07,321 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:20:07,322 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:20:07,322 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:20:07,322 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:20:07,322 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:20:07,323 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:20:07,323 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:20:07,323 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:20:07,323 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:20:07,324 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_0c21f8e8-a878-46bd-b09f-372f6b8f7349/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d [2023-11-12 02:20:07,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:20:07,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:20:07,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:20:07,620 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:20:07,620 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:20:07,622 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/clever.wvr.c [2023-11-12 02:20:10,760 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:20:11,125 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:20:11,127 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/sv-benchmarks/c/weaver/clever.wvr.c [2023-11-12 02:20:11,140 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/data/85741ad84/0781386d645943b7b89af5610431e19e/FLAG0089c34bc [2023-11-12 02:20:11,163 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/data/85741ad84/0781386d645943b7b89af5610431e19e [2023-11-12 02:20:11,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:20:11,174 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:20:11,178 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:20:11,178 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:20:11,184 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:20:11,185 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:20:11" (1/1) ... [2023-11-12 02:20:11,186 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b7b67d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:11, skipping insertion in model container [2023-11-12 02:20:11,187 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:20:11" (1/1) ... [2023-11-12 02:20:11,217 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:20:11,451 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_0c21f8e8-a878-46bd-b09f-372f6b8f7349/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2023-11-12 02:20:11,458 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:20:11,470 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:20:11,496 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_0c21f8e8-a878-46bd-b09f-372f6b8f7349/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2023-11-12 02:20:11,497 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:20:11,514 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:20:11,514 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:11 WrapperNode [2023-11-12 02:20:11,515 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:20:11,516 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:20:11,516 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:20:11,516 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:20:11,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:11" (1/1) ... [2023-11-12 02:20:11,531 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:11" (1/1) ... [2023-11-12 02:20:11,554 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 84 [2023-11-12 02:20:11,555 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:20:11,555 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:20:11,556 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:20:11,556 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:20:11,564 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:11" (1/1) ... [2023-11-12 02:20:11,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:11" (1/1) ... [2023-11-12 02:20:11,573 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:11" (1/1) ... [2023-11-12 02:20:11,573 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:11" (1/1) ... [2023-11-12 02:20:11,586 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:11" (1/1) ... [2023-11-12 02:20:11,590 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:11" (1/1) ... [2023-11-12 02:20:11,592 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:11" (1/1) ... [2023-11-12 02:20:11,594 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:11" (1/1) ... [2023-11-12 02:20:11,596 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:20:11,597 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:20:11,597 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:20:11,598 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:20:11,598 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:11" (1/1) ... [2023-11-12 02:20:11,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:20:11,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:11,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:11,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:20:11,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:20:11,700 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:20:11,700 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:20:11,701 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:20:11,701 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:20:11,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:20:11,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:20:11,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:20:11,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:20:11,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:20:11,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:20:11,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:20:11,704 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 02:20:11,879 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:20:11,882 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:20:12,237 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:20:12,248 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:20:12,248 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:20:12,251 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:20:12 BoogieIcfgContainer [2023-11-12 02:20:12,251 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:20:12,254 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:20:12,254 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:20:12,258 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:20:12,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:20:11" (1/3) ... [2023-11-12 02:20:12,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f30c674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:20:12, skipping insertion in model container [2023-11-12 02:20:12,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:11" (2/3) ... [2023-11-12 02:20:12,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f30c674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:20:12, skipping insertion in model container [2023-11-12 02:20:12,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:20:12" (3/3) ... [2023-11-12 02:20:12,262 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2023-11-12 02:20:12,273 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:20:12,288 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:20:12,288 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:20:12,289 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:20:12,383 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:20:12,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 126 transitions, 266 flow [2023-11-12 02:20:12,512 INFO L124 PetriNetUnfolderBase]: 9/124 cut-off events. [2023-11-12 02:20:12,512 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:20:12,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 124 events. 9/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-11-12 02:20:12,518 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 126 transitions, 266 flow [2023-11-12 02:20:12,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 115 transitions, 242 flow [2023-11-12 02:20:12,529 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:20:12,540 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 115 transitions, 242 flow [2023-11-12 02:20:12,543 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 115 transitions, 242 flow [2023-11-12 02:20:12,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 115 transitions, 242 flow [2023-11-12 02:20:12,596 INFO L124 PetriNetUnfolderBase]: 9/115 cut-off events. [2023-11-12 02:20:12,596 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:20:12,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 115 events. 9/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-11-12 02:20:12,600 INFO L119 LiptonReduction]: Number of co-enabled transitions 842 [2023-11-12 02:20:16,642 INFO L134 LiptonReduction]: Checked pairs total: 820 [2023-11-12 02:20:16,642 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-11-12 02:20:16,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:20:16,672 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;@7990947d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:20:16,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:20:16,688 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:20:16,688 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-12 02:20:16,688 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:20:16,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:16,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:16,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:16,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:16,696 INFO L85 PathProgramCache]: Analyzing trace with hash 87805163, now seen corresponding path program 1 times [2023-11-12 02:20:16,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:16,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62051906] [2023-11-12 02:20:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:16,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:17,351 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 02:20:17,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:17,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62051906] [2023-11-12 02:20:17,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62051906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:17,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:17,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:20:17,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376528981] [2023-11-12 02:20:17,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:17,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:20:17,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:17,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:20:17,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:17,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 237 [2023-11-12 02:20:17,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states 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 02:20:17,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:17,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 237 [2023-11-12 02:20:17,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:17,530 INFO L124 PetriNetUnfolderBase]: 112/181 cut-off events. [2023-11-12 02:20:17,530 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-12 02:20:17,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 181 events. 112/181 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 551 event pairs, 20 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 318. Up to 118 conditions per place. [2023-11-12 02:20:17,535 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 23 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2023-11-12 02:20:17,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 29 transitions, 133 flow [2023-11-12 02:20:17,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:20:17,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:20:17,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2023-11-12 02:20:17,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49929676511954996 [2023-11-12 02:20:17,564 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2023-11-12 02:20:17,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2023-11-12 02:20:17,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:17,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2023-11-12 02:20:17,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 02:20:17,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states 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 02:20:17,583 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states 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 02:20:17,586 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 355 transitions. [2023-11-12 02:20:17,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 29 transitions, 133 flow [2023-11-12 02:20:17,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:20:17,592 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2023-11-12 02:20:17,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-12 02:20:17,598 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-12 02:20:17,599 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2023-11-12 02:20:17,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states 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 02:20:17,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:17,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:17,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:20:17,601 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:17,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:17,602 INFO L85 PathProgramCache]: Analyzing trace with hash -855904466, now seen corresponding path program 1 times [2023-11-12 02:20:17,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:17,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977549423] [2023-11-12 02:20:17,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:17,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:17,784 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 02:20:17,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:17,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977549423] [2023-11-12 02:20:17,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977549423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:17,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:17,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:20:17,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59462119] [2023-11-12 02:20:17,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:17,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:20:17,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:17,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:20:17,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:20:17,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 237 [2023-11-12 02:20:17,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 02:20:17,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:17,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 237 [2023-11-12 02:20:17,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:18,032 INFO L124 PetriNetUnfolderBase]: 152/263 cut-off events. [2023-11-12 02:20:18,033 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-12 02:20:18,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629 conditions, 263 events. 152/263 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 898 event pairs, 18 based on Foata normal form. 4/236 useless extension candidates. Maximal degree in co-relation 204. Up to 173 conditions per place. [2023-11-12 02:20:18,042 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 35 selfloop transitions, 6 changer transitions 8/51 dead transitions. [2023-11-12 02:20:18,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 51 transitions, 247 flow [2023-11-12 02:20:18,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:20:18,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:20:18,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 570 transitions. [2023-11-12 02:20:18,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810126582278481 [2023-11-12 02:20:18,051 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 570 transitions. [2023-11-12 02:20:18,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 570 transitions. [2023-11-12 02:20:18,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:18,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 570 transitions. [2023-11-12 02:20:18,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states 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 02:20:18,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states 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 02:20:18,064 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states 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 02:20:18,065 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 570 transitions. [2023-11-12 02:20:18,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 51 transitions, 247 flow [2023-11-12 02:20:18,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 51 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:20:18,072 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 103 flow [2023-11-12 02:20:18,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2023-11-12 02:20:18,074 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 4 predicate places. [2023-11-12 02:20:18,075 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 103 flow [2023-11-12 02:20:18,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 02:20:18,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:18,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:18,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:20:18,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:18,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:18,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1214870514, now seen corresponding path program 2 times [2023-11-12 02:20:18,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:18,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567271466] [2023-11-12 02:20:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:18,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:18,276 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 02:20:18,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:18,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567271466] [2023-11-12 02:20:18,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567271466] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:18,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:18,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:20:18,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688232312] [2023-11-12 02:20:18,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:18,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:20:18,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:18,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:20:18,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:20:18,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 237 [2023-11-12 02:20:18,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 02:20:18,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:18,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 237 [2023-11-12 02:20:18,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:18,449 INFO L124 PetriNetUnfolderBase]: 131/216 cut-off events. [2023-11-12 02:20:18,449 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2023-11-12 02:20:18,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 679 conditions, 216 events. 131/216 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 642 event pairs, 20 based on Foata normal form. 8/221 useless extension candidates. Maximal degree in co-relation 206. Up to 157 conditions per place. [2023-11-12 02:20:18,452 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 29 selfloop transitions, 7 changer transitions 5/43 dead transitions. [2023-11-12 02:20:18,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 43 transitions, 251 flow [2023-11-12 02:20:18,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:20:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:20:18,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 564 transitions. [2023-11-12 02:20:18,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4759493670886076 [2023-11-12 02:20:18,458 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 564 transitions. [2023-11-12 02:20:18,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 564 transitions. [2023-11-12 02:20:18,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:18,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 564 transitions. [2023-11-12 02:20:18,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.8) internal successors, (564), 5 states have internal predecessors, (564), 0 states have call successors, (0), 0 states 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 02:20:18,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states 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 02:20:18,466 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states 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 02:20:18,467 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 103 flow. Second operand 5 states and 564 transitions. [2023-11-12 02:20:18,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 43 transitions, 251 flow [2023-11-12 02:20:18,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 43 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:20:18,470 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 131 flow [2023-11-12 02:20:18,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-11-12 02:20:18,471 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 8 predicate places. [2023-11-12 02:20:18,472 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 131 flow [2023-11-12 02:20:18,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 02:20:18,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:18,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:18,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:20:18,473 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:18,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:18,474 INFO L85 PathProgramCache]: Analyzing trace with hash -233199376, now seen corresponding path program 1 times [2023-11-12 02:20:18,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:18,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994630456] [2023-11-12 02:20:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:18,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:18,618 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 02:20:18,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:18,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994630456] [2023-11-12 02:20:18,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994630456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:18,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953497568] [2023-11-12 02:20:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:18,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:18,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:18,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:18,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:20:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:18,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:20:18,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:18,841 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 02:20:18,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:18,889 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 02:20:18,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953497568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:18,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:18,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-11-12 02:20:18,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17797918] [2023-11-12 02:20:18,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:18,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:20:18,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:18,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:20:18,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:20:18,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 237 [2023-11-12 02:20:18,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 131 flow. Second operand has 7 states, 7 states have (on average 106.85714285714286) internal successors, (748), 7 states have internal predecessors, (748), 0 states have call successors, (0), 0 states 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 02:20:18,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:18,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 237 [2023-11-12 02:20:18,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:19,058 INFO L124 PetriNetUnfolderBase]: 108/177 cut-off events. [2023-11-12 02:20:19,059 INFO L125 PetriNetUnfolderBase]: For 172/172 co-relation queries the response was YES. [2023-11-12 02:20:19,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 177 events. 108/177 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 459 event pairs, 0 based on Foata normal form. 16/191 useless extension candidates. Maximal degree in co-relation 291. Up to 91 conditions per place. [2023-11-12 02:20:19,062 INFO L140 encePairwiseOnDemand]: 232/237 looper letters, 31 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2023-11-12 02:20:19,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 268 flow [2023-11-12 02:20:19,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:20:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:20:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 550 transitions. [2023-11-12 02:20:19,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641350210970464 [2023-11-12 02:20:19,066 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 550 transitions. [2023-11-12 02:20:19,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 550 transitions. [2023-11-12 02:20:19,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:19,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 550 transitions. [2023-11-12 02:20:19,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 02:20:19,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states 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 02:20:19,074 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states 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 02:20:19,075 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 131 flow. Second operand 5 states and 550 transitions. [2023-11-12 02:20:19,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 268 flow [2023-11-12 02:20:19,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 256 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-12 02:20:19,079 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 148 flow [2023-11-12 02:20:19,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-12 02:20:19,081 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-11-12 02:20:19,081 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 148 flow [2023-11-12 02:20:19,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 106.85714285714286) internal successors, (748), 7 states have internal predecessors, (748), 0 states have call successors, (0), 0 states 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 02:20:19,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:19,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:19,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:20:19,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:19,289 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:19,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:19,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1933809968, now seen corresponding path program 1 times [2023-11-12 02:20:19,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:19,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416179774] [2023-11-12 02:20:19,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:19,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:19,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:19,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416179774] [2023-11-12 02:20:19,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416179774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:19,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245680108] [2023-11-12 02:20:19,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:19,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:19,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:19,659 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:19,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:20:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:19,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:20:19,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:20,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:20,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245680108] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:20,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:20,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-11-12 02:20:20,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133416956] [2023-11-12 02:20:20,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:20,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:20:20,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:20,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:20:20,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:20:20,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 237 [2023-11-12 02:20:20,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 148 flow. Second operand has 13 states, 13 states have (on average 101.0) internal successors, (1313), 13 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states 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 02:20:20,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:20,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 237 [2023-11-12 02:20:20,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:20,933 INFO L124 PetriNetUnfolderBase]: 232/379 cut-off events. [2023-11-12 02:20:20,933 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2023-11-12 02:20:20,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1440 conditions, 379 events. 232/379 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1282 event pairs, 20 based on Foata normal form. 2/379 useless extension candidates. Maximal degree in co-relation 566. Up to 189 conditions per place. [2023-11-12 02:20:20,938 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 56 selfloop transitions, 20 changer transitions 5/83 dead transitions. [2023-11-12 02:20:20,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 83 transitions, 572 flow [2023-11-12 02:20:20,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:20:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:20:20,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 956 transitions. [2023-11-12 02:20:20,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481950304735115 [2023-11-12 02:20:20,944 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 956 transitions. [2023-11-12 02:20:20,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 956 transitions. [2023-11-12 02:20:20,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:20,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 956 transitions. [2023-11-12 02:20:20,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 106.22222222222223) internal successors, (956), 9 states have internal predecessors, (956), 0 states have call successors, (0), 0 states 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 02:20:20,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 237.0) internal successors, (2370), 10 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states 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 02:20:20,955 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 237.0) internal successors, (2370), 10 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states 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 02:20:20,956 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 148 flow. Second operand 9 states and 956 transitions. [2023-11-12 02:20:20,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 83 transitions, 572 flow [2023-11-12 02:20:20,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 83 transitions, 554 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:20:20,962 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 320 flow [2023-11-12 02:20:20,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=320, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2023-11-12 02:20:20,963 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-11-12 02:20:20,963 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 320 flow [2023-11-12 02:20:20,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 101.0) internal successors, (1313), 13 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states 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 02:20:20,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:20,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:20,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 02:20:21,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:21,171 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:21,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:21,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1861289338, now seen corresponding path program 2 times [2023-11-12 02:20:21,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:21,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022118834] [2023-11-12 02:20:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:21,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:21,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:21,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022118834] [2023-11-12 02:20:21,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022118834] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:21,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682244047] [2023-11-12 02:20:21,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:20:21,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:21,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:21,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:21,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:20:21,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:20:21,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:20:21,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:20:21,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:21,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:22,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682244047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:22,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:22,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-11-12 02:20:22,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833077485] [2023-11-12 02:20:22,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:22,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:20:22,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:22,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:20:22,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:20:22,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 237 [2023-11-12 02:20:22,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 320 flow. Second operand has 13 states, 13 states have (on average 100.84615384615384) internal successors, (1311), 13 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states 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 02:20:22,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:22,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 237 [2023-11-12 02:20:22,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:23,668 INFO L124 PetriNetUnfolderBase]: 631/1033 cut-off events. [2023-11-12 02:20:23,668 INFO L125 PetriNetUnfolderBase]: For 1943/1943 co-relation queries the response was YES. [2023-11-12 02:20:23,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4395 conditions, 1033 events. 631/1033 cut-off events. For 1943/1943 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4497 event pairs, 42 based on Foata normal form. 5/1036 useless extension candidates. Maximal degree in co-relation 3631. Up to 547 conditions per place. [2023-11-12 02:20:23,683 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 105 selfloop transitions, 56 changer transitions 7/170 dead transitions. [2023-11-12 02:20:23,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 170 transitions, 1373 flow [2023-11-12 02:20:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:20:23,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-12 02:20:23,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1609 transitions. [2023-11-12 02:20:23,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45260196905766525 [2023-11-12 02:20:23,692 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1609 transitions. [2023-11-12 02:20:23,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1609 transitions. [2023-11-12 02:20:23,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:23,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1609 transitions. [2023-11-12 02:20:23,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 107.26666666666667) internal successors, (1609), 15 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states 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 02:20:23,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 237.0) internal successors, (3792), 16 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states 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 02:20:23,711 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 237.0) internal successors, (3792), 16 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states 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 02:20:23,712 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 320 flow. Second operand 15 states and 1609 transitions. [2023-11-12 02:20:23,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 170 transitions, 1373 flow [2023-11-12 02:20:23,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 170 transitions, 1318 flow, removed 26 selfloop flow, removed 1 redundant places. [2023-11-12 02:20:23,725 INFO L231 Difference]: Finished difference. Result has 64 places, 85 transitions, 877 flow [2023-11-12 02:20:23,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=877, PETRI_PLACES=64, PETRI_TRANSITIONS=85} [2023-11-12 02:20:23,726 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 43 predicate places. [2023-11-12 02:20:23,726 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 85 transitions, 877 flow [2023-11-12 02:20:23,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 100.84615384615384) internal successors, (1311), 13 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states 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 02:20:23,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:23,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:23,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:23,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:23,935 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:23,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:23,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1444808880, now seen corresponding path program 3 times [2023-11-12 02:20:23,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:23,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893288034] [2023-11-12 02:20:23,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:23,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:24,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:24,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893288034] [2023-11-12 02:20:24,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893288034] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:24,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716130586] [2023-11-12 02:20:24,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:20:24,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:24,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:24,423 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:24,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:20:24,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:20:24,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:20:24,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:20:24,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:24,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:24,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716130586] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:24,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:24,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-11-12 02:20:24,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722904482] [2023-11-12 02:20:24,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:24,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:20:24,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:24,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:20:24,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:20:25,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 237 [2023-11-12 02:20:25,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 85 transitions, 877 flow. Second operand has 13 states, 13 states have (on average 100.84615384615384) internal successors, (1311), 13 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states 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 02:20:25,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:25,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 237 [2023-11-12 02:20:25,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:26,193 INFO L124 PetriNetUnfolderBase]: 1103/1800 cut-off events. [2023-11-12 02:20:26,194 INFO L125 PetriNetUnfolderBase]: For 7771/7771 co-relation queries the response was YES. [2023-11-12 02:20:26,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9495 conditions, 1800 events. 1103/1800 cut-off events. For 7771/7771 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8907 event pairs, 182 based on Foata normal form. 4/1802 useless extension candidates. Maximal degree in co-relation 7412. Up to 971 conditions per place. [2023-11-12 02:20:26,222 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 109 selfloop transitions, 75 changer transitions 5/191 dead transitions. [2023-11-12 02:20:26,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 191 transitions, 2162 flow [2023-11-12 02:20:26,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:20:26,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-12 02:20:26,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1061 transitions. [2023-11-12 02:20:26,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476793248945148 [2023-11-12 02:20:26,228 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1061 transitions. [2023-11-12 02:20:26,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1061 transitions. [2023-11-12 02:20:26,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:26,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1061 transitions. [2023-11-12 02:20:26,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 106.1) internal successors, (1061), 10 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states 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 02:20:26,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 237.0) internal successors, (2607), 11 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states 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 02:20:26,241 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 237.0) internal successors, (2607), 11 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states 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 02:20:26,242 INFO L175 Difference]: Start difference. First operand has 64 places, 85 transitions, 877 flow. Second operand 10 states and 1061 transitions. [2023-11-12 02:20:26,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 191 transitions, 2162 flow [2023-11-12 02:20:26,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 191 transitions, 1921 flow, removed 111 selfloop flow, removed 3 redundant places. [2023-11-12 02:20:26,283 INFO L231 Difference]: Finished difference. Result has 74 places, 131 transitions, 1468 flow [2023-11-12 02:20:26,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1468, PETRI_PLACES=74, PETRI_TRANSITIONS=131} [2023-11-12 02:20:26,285 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 53 predicate places. [2023-11-12 02:20:26,288 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 131 transitions, 1468 flow [2023-11-12 02:20:26,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 100.84615384615384) internal successors, (1311), 13 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states 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 02:20:26,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:26,289 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:26,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:26,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:26,502 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:26,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:26,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1396822900, now seen corresponding path program 1 times [2023-11-12 02:20:26,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:26,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132607128] [2023-11-12 02:20:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:26,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:27,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:27,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132607128] [2023-11-12 02:20:27,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132607128] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:27,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164391156] [2023-11-12 02:20:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:27,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:27,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:27,031 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:27,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:20:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:27,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:20:27,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:27,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:28,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164391156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:28,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:28,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-12 02:20:28,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760101076] [2023-11-12 02:20:28,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:28,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:20:28,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:28,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:20:28,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:20:29,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 237 [2023-11-12 02:20:29,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 131 transitions, 1468 flow. Second operand has 19 states, 19 states have (on average 100.26315789473684) internal successors, (1905), 19 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states 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 02:20:29,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:29,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 237 [2023-11-12 02:20:29,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:33,134 INFO L124 PetriNetUnfolderBase]: 1588/2594 cut-off events. [2023-11-12 02:20:33,134 INFO L125 PetriNetUnfolderBase]: For 14813/14813 co-relation queries the response was YES. [2023-11-12 02:20:33,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14456 conditions, 2594 events. 1588/2594 cut-off events. For 14813/14813 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 13870 event pairs, 146 based on Foata normal form. 4/2596 useless extension candidates. Maximal degree in co-relation 11911. Up to 1389 conditions per place. [2023-11-12 02:20:33,168 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 206 selfloop transitions, 139 changer transitions 5/352 dead transitions. [2023-11-12 02:20:33,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 352 transitions, 3987 flow [2023-11-12 02:20:33,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-12 02:20:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-12 02:20:33,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2951 transitions. [2023-11-12 02:20:33,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4446955997588909 [2023-11-12 02:20:33,181 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2951 transitions. [2023-11-12 02:20:33,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2951 transitions. [2023-11-12 02:20:33,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:33,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2951 transitions. [2023-11-12 02:20:33,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 105.39285714285714) internal successors, (2951), 28 states have internal predecessors, (2951), 0 states have call successors, (0), 0 states 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 02:20:33,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 237.0) internal successors, (6873), 29 states have internal predecessors, (6873), 0 states have call successors, (0), 0 states 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 02:20:33,211 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 237.0) internal successors, (6873), 29 states have internal predecessors, (6873), 0 states have call successors, (0), 0 states 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 02:20:33,212 INFO L175 Difference]: Start difference. First operand has 74 places, 131 transitions, 1468 flow. Second operand 28 states and 2951 transitions. [2023-11-12 02:20:33,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 352 transitions, 3987 flow [2023-11-12 02:20:33,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 352 transitions, 3866 flow, removed 49 selfloop flow, removed 6 redundant places. [2023-11-12 02:20:33,276 INFO L231 Difference]: Finished difference. Result has 99 places, 233 transitions, 3151 flow [2023-11-12 02:20:33,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3151, PETRI_PLACES=99, PETRI_TRANSITIONS=233} [2023-11-12 02:20:33,277 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 78 predicate places. [2023-11-12 02:20:33,278 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 233 transitions, 3151 flow [2023-11-12 02:20:33,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 100.26315789473684) internal successors, (1905), 19 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states 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 02:20:33,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:33,279 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:33,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 02:20:33,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:20:33,485 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:33,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:33,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1695259588, now seen corresponding path program 2 times [2023-11-12 02:20:33,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:33,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737133900] [2023-11-12 02:20:33,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:33,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:33,623 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 02:20:33,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:33,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737133900] [2023-11-12 02:20:33,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737133900] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:33,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204827740] [2023-11-12 02:20:33,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:20:33,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:33,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:33,626 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:33,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:20:33,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:20:33,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:20:33,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:20:33,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:33,790 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 02:20:33,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:20:33,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204827740] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:33,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:33,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-12 02:20:33,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936515554] [2023-11-12 02:20:33,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:33,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:20:33,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:33,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:20:33,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:20:33,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 237 [2023-11-12 02:20:33,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 233 transitions, 3151 flow. Second operand has 10 states, 10 states have (on average 106.0) internal successors, (1060), 10 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states 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 02:20:33,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:33,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 237 [2023-11-12 02:20:33,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:35,396 INFO L124 PetriNetUnfolderBase]: 2927/4877 cut-off events. [2023-11-12 02:20:35,396 INFO L125 PetriNetUnfolderBase]: For 35001/35001 co-relation queries the response was YES. [2023-11-12 02:20:35,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29002 conditions, 4877 events. 2927/4877 cut-off events. For 35001/35001 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 30357 event pairs, 90 based on Foata normal form. 88/4962 useless extension candidates. Maximal degree in co-relation 27665. Up to 2573 conditions per place. [2023-11-12 02:20:35,468 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 503 selfloop transitions, 199 changer transitions 11/715 dead transitions. [2023-11-12 02:20:35,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 715 transitions, 10806 flow [2023-11-12 02:20:35,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:20:35,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:20:35,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1325 transitions. [2023-11-12 02:20:35,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658931082981716 [2023-11-12 02:20:35,474 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1325 transitions. [2023-11-12 02:20:35,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1325 transitions. [2023-11-12 02:20:35,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:35,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1325 transitions. [2023-11-12 02:20:35,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 110.41666666666667) internal successors, (1325), 12 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states 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 02:20:35,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 237.0) internal successors, (3081), 13 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states 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 02:20:35,488 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 237.0) internal successors, (3081), 13 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states 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 02:20:35,488 INFO L175 Difference]: Start difference. First operand has 99 places, 233 transitions, 3151 flow. Second operand 12 states and 1325 transitions. [2023-11-12 02:20:35,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 715 transitions, 10806 flow [2023-11-12 02:20:35,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 715 transitions, 8668 flow, removed 1051 selfloop flow, removed 5 redundant places. [2023-11-12 02:20:35,670 INFO L231 Difference]: Finished difference. Result has 114 places, 416 transitions, 5738 flow [2023-11-12 02:20:35,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5738, PETRI_PLACES=114, PETRI_TRANSITIONS=416} [2023-11-12 02:20:35,673 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 93 predicate places. [2023-11-12 02:20:35,673 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 416 transitions, 5738 flow [2023-11-12 02:20:35,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 106.0) internal successors, (1060), 10 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states 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 02:20:35,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:35,674 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:35,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:35,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:35,882 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:35,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:35,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1390062124, now seen corresponding path program 3 times [2023-11-12 02:20:35,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:35,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544172376] [2023-11-12 02:20:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:35,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:36,063 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 02:20:36,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:36,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544172376] [2023-11-12 02:20:36,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544172376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:36,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030022445] [2023-11-12 02:20:36,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:20:36,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:36,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:36,065 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:36,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:20:36,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:20:36,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:20:36,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:20:36,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:36,235 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 02:20:36,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:20:36,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030022445] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:36,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:36,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-11-12 02:20:36,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295115017] [2023-11-12 02:20:36,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:36,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:20:36,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:36,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:20:36,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:20:36,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 237 [2023-11-12 02:20:36,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 416 transitions, 5738 flow. Second operand has 9 states, 9 states have (on average 106.22222222222223) internal successors, (956), 9 states have internal predecessors, (956), 0 states have call successors, (0), 0 states 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 02:20:36,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:36,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 237 [2023-11-12 02:20:36,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:38,164 INFO L124 PetriNetUnfolderBase]: 3343/5822 cut-off events. [2023-11-12 02:20:38,164 INFO L125 PetriNetUnfolderBase]: For 45567/45567 co-relation queries the response was YES. [2023-11-12 02:20:38,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35945 conditions, 5822 events. 3343/5822 cut-off events. For 45567/45567 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 39579 event pairs, 290 based on Foata normal form. 40/5860 useless extension candidates. Maximal degree in co-relation 34623. Up to 2817 conditions per place. [2023-11-12 02:20:38,324 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 359 selfloop transitions, 373 changer transitions 0/734 dead transitions. [2023-11-12 02:20:38,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 734 transitions, 10972 flow [2023-11-12 02:20:38,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:20:38,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:20:38,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1539 transitions. [2023-11-12 02:20:38,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638336347197107 [2023-11-12 02:20:38,331 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1539 transitions. [2023-11-12 02:20:38,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1539 transitions. [2023-11-12 02:20:38,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:38,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1539 transitions. [2023-11-12 02:20:38,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 109.92857142857143) internal successors, (1539), 14 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states 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 02:20:38,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 237.0) internal successors, (3555), 15 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states 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 02:20:38,346 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 237.0) internal successors, (3555), 15 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states 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 02:20:38,347 INFO L175 Difference]: Start difference. First operand has 114 places, 416 transitions, 5738 flow. Second operand 14 states and 1539 transitions. [2023-11-12 02:20:38,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 734 transitions, 10972 flow [2023-11-12 02:20:38,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 734 transitions, 10312 flow, removed 323 selfloop flow, removed 2 redundant places. [2023-11-12 02:20:38,779 INFO L231 Difference]: Finished difference. Result has 133 places, 542 transitions, 8479 flow [2023-11-12 02:20:38,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=5196, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8479, PETRI_PLACES=133, PETRI_TRANSITIONS=542} [2023-11-12 02:20:38,782 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 112 predicate places. [2023-11-12 02:20:38,782 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 542 transitions, 8479 flow [2023-11-12 02:20:38,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 106.22222222222223) internal successors, (956), 9 states have internal predecessors, (956), 0 states have call successors, (0), 0 states 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 02:20:38,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:38,783 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:38,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:38,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:38,991 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:38,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:38,991 INFO L85 PathProgramCache]: Analyzing trace with hash 135586478, now seen corresponding path program 4 times [2023-11-12 02:20:38,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:38,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255637759] [2023-11-12 02:20:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:38,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:39,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:39,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255637759] [2023-11-12 02:20:39,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255637759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:39,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280069523] [2023-11-12 02:20:39,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:20:39,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:39,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:39,546 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:39,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:20:39,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:20:39,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:20:39,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 02:20:39,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:40,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:40,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280069523] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:40,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:40,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-12 02:20:40,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166763102] [2023-11-12 02:20:40,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:40,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:20:40,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:40,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:20:40,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:20:42,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 237 [2023-11-12 02:20:42,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 542 transitions, 8479 flow. Second operand has 19 states, 19 states have (on average 100.26315789473684) internal successors, (1905), 19 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states 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 02:20:42,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:42,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 237 [2023-11-12 02:20:42,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:48,525 INFO L124 PetriNetUnfolderBase]: 5185/9114 cut-off events. [2023-11-12 02:20:48,525 INFO L125 PetriNetUnfolderBase]: For 86952/86952 co-relation queries the response was YES. [2023-11-12 02:20:48,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60374 conditions, 9114 events. 5185/9114 cut-off events. For 86952/86952 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 68008 event pairs, 284 based on Foata normal form. 17/9129 useless extension candidates. Maximal degree in co-relation 57897. Up to 3615 conditions per place. [2023-11-12 02:20:48,651 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 462 selfloop transitions, 664 changer transitions 23/1151 dead transitions. [2023-11-12 02:20:48,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 1151 transitions, 18752 flow [2023-11-12 02:20:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-12 02:20:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-12 02:20:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3606 transitions. [2023-11-12 02:20:48,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44750558451228595 [2023-11-12 02:20:48,661 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3606 transitions. [2023-11-12 02:20:48,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3606 transitions. [2023-11-12 02:20:48,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:48,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3606 transitions. [2023-11-12 02:20:48,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 106.05882352941177) internal successors, (3606), 34 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states 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 02:20:48,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 237.0) internal successors, (8295), 35 states have internal predecessors, (8295), 0 states have call successors, (0), 0 states 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 02:20:48,694 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 237.0) internal successors, (8295), 35 states have internal predecessors, (8295), 0 states have call successors, (0), 0 states 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 02:20:48,694 INFO L175 Difference]: Start difference. First operand has 133 places, 542 transitions, 8479 flow. Second operand 34 states and 3606 transitions. [2023-11-12 02:20:48,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 1151 transitions, 18752 flow [2023-11-12 02:20:50,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 1151 transitions, 17932 flow, removed 401 selfloop flow, removed 2 redundant places. [2023-11-12 02:20:50,079 INFO L231 Difference]: Finished difference. Result has 181 places, 926 transitions, 16808 flow [2023-11-12 02:20:50,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=8055, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=16808, PETRI_PLACES=181, PETRI_TRANSITIONS=926} [2023-11-12 02:20:50,080 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 160 predicate places. [2023-11-12 02:20:50,081 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 926 transitions, 16808 flow [2023-11-12 02:20:50,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 100.26315789473684) internal successors, (1905), 19 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states 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 02:20:50,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:20:50,082 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:50,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:20:50,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:50,287 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:20:50,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:50,288 INFO L85 PathProgramCache]: Analyzing trace with hash 30905616, now seen corresponding path program 5 times [2023-11-12 02:20:50,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:50,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911529163] [2023-11-12 02:20:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:50,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:50,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:50,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911529163] [2023-11-12 02:20:50,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911529163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:50,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046238716] [2023-11-12 02:20:50,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:20:50,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:50,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:50,494 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:50,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c21f8e8-a878-46bd-b09f-372f6b8f7349/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:20:50,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-12 02:20:50,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:20:50,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:20:50,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:50,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:20:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:50,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046238716] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:20:50,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:20:50,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-12 02:20:50,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905417623] [2023-11-12 02:20:50,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:20:50,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:20:50,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:50,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:20:50,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:20:50,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 237 [2023-11-12 02:20:50,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 926 transitions, 16808 flow. Second operand has 10 states, 10 states have (on average 105.9) internal successors, (1059), 10 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states 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 02:20:50,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:20:50,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 237 [2023-11-12 02:20:50,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:20:55,284 INFO L124 PetriNetUnfolderBase]: 6213/10891 cut-off events. [2023-11-12 02:20:55,284 INFO L125 PetriNetUnfolderBase]: For 127345/127345 co-relation queries the response was YES. [2023-11-12 02:20:55,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79176 conditions, 10891 events. 6213/10891 cut-off events. For 127345/127345 co-relation queries the response was YES. Maximal size of possible extension queue 767. Compared 83555 event pairs, 488 based on Foata normal form. 160/11049 useless extension candidates. Maximal degree in co-relation 77603. Up to 4515 conditions per place. [2023-11-12 02:20:55,507 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 679 selfloop transitions, 743 changer transitions 0/1424 dead transitions. [2023-11-12 02:20:55,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 1424 transitions, 27889 flow [2023-11-12 02:20:55,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:20:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:20:55,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1538 transitions. [2023-11-12 02:20:55,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46353224834237494 [2023-11-12 02:20:55,516 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1538 transitions. [2023-11-12 02:20:55,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1538 transitions. [2023-11-12 02:20:55,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:20:55,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1538 transitions. [2023-11-12 02:20:55,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 109.85714285714286) internal successors, (1538), 14 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states 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 02:20:55,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 237.0) internal successors, (3555), 15 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states 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 02:20:55,527 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 237.0) internal successors, (3555), 15 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states 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 02:20:55,527 INFO L175 Difference]: Start difference. First operand has 181 places, 926 transitions, 16808 flow. Second operand 14 states and 1538 transitions. [2023-11-12 02:20:55,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 1424 transitions, 27889 flow