./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme --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 874fb84f685baf0441a9bf8db1864605baa10908128545fe3028b9b499246108 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:50:00,348 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:50:00,455 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:50:00,462 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:50:00,462 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:50:00,489 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:50:00,490 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:50:00,491 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:50:00,492 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:50:00,492 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:50:00,493 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:50:00,494 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:50:00,495 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:50:00,495 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:50:00,496 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:50:00,497 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:50:00,497 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:50:00,498 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:50:00,499 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:50:00,499 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:50:00,500 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:50:00,501 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:50:00,502 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:50:00,502 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:50:00,503 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:50:00,504 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:50:00,504 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:50:00,505 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:50:00,506 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:50:00,506 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:50:00,507 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:50:00,507 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:50:00,508 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:50:00,509 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:50:00,509 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:50:00,510 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:50:00,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:50:00,511 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:50:00,511 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:50:00,512 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:50:00,512 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:50:00,513 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:50:00,513 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_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 874fb84f685baf0441a9bf8db1864605baa10908128545fe3028b9b499246108 [2023-11-26 11:50:00,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:50:00,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:50:00,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:50:00,877 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:50:00,882 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:50:00,883 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread/triangular-longest-2.i [2023-11-26 11:50:04,027 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:50:04,409 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:50:04,409 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/sv-benchmarks/c/pthread/triangular-longest-2.i [2023-11-26 11:50:04,425 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/data/a69d7afa0/35a6b7d3d1ea4c829d4303bbea8db6ea/FLAG401f87d2a [2023-11-26 11:50:04,441 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/data/a69d7afa0/35a6b7d3d1ea4c829d4303bbea8db6ea [2023-11-26 11:50:04,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:50:04,445 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:50:04,447 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:50:04,447 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:50:04,453 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:50:04,453 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:50:04" (1/1) ... [2023-11-26 11:50:04,455 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a5fef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:04, skipping insertion in model container [2023-11-26 11:50:04,455 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:50:04" (1/1) ... [2023-11-26 11:50:04,532 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:50:05,027 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_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/sv-benchmarks/c/pthread/triangular-longest-2.i[30964,30977] [2023-11-26 11:50:05,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:50:05,042 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:50:05,089 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_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/sv-benchmarks/c/pthread/triangular-longest-2.i[30964,30977] [2023-11-26 11:50:05,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:50:05,131 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:50:05,131 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:50:05,139 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:50:05,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:05 WrapperNode [2023-11-26 11:50:05,141 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:50:05,142 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:50:05,143 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:50:05,143 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:50:05,152 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:05" (1/1) ... [2023-11-26 11:50:05,187 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:05" (1/1) ... [2023-11-26 11:50:05,212 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2023-11-26 11:50:05,213 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:50:05,213 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:50:05,214 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:50:05,214 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:50:05,226 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:05" (1/1) ... [2023-11-26 11:50:05,226 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:05" (1/1) ... [2023-11-26 11:50:05,233 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:05" (1/1) ... [2023-11-26 11:50:05,265 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-26 11:50:05,265 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:05" (1/1) ... [2023-11-26 11:50:05,265 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:05" (1/1) ... [2023-11-26 11:50:05,277 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:05" (1/1) ... [2023-11-26 11:50:05,281 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:05" (1/1) ... [2023-11-26 11:50:05,283 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:05" (1/1) ... [2023-11-26 11:50:05,284 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:05" (1/1) ... [2023-11-26 11:50:05,287 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:50:05,288 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:50:05,289 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:50:05,289 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:50:05,290 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:05" (1/1) ... [2023-11-26 11:50:05,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:50:05,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:05,327 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:50:05,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:50:05,370 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-26 11:50:05,371 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-26 11:50:05,371 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-26 11:50:05,371 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-26 11:50:05,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:50:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:50:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:50:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:50:05,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:50:05,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:50:05,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:50:05,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:50:05,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:50:05,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:50:05,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:50:05,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:50:05,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:50:05,376 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:50:05,519 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:50:05,522 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:50:05,755 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:50:05,865 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:50:05,866 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:50:05,866 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:50:05 BoogieIcfgContainer [2023-11-26 11:50:05,866 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:50:05,869 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:50:05,870 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:50:05,873 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:50:05,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:50:04" (1/3) ... [2023-11-26 11:50:05,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191d9e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:50:05, skipping insertion in model container [2023-11-26 11:50:05,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:05" (2/3) ... [2023-11-26 11:50:05,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191d9e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:50:05, skipping insertion in model container [2023-11-26 11:50:05,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:50:05" (3/3) ... [2023-11-26 11:50:05,877 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2023-11-26 11:50:05,887 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:50:05,899 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:50:05,899 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:50:05,899 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:50:05,935 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-26 11:50:05,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 56 flow [2023-11-26 11:50:06,000 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2023-11-26 11:50:06,001 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:50:06,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 22 events. 3/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2023-11-26 11:50:06,004 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 56 flow [2023-11-26 11:50:06,008 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 22 transitions, 50 flow [2023-11-26 11:50:06,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:50:06,026 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;@42ca1744, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:50:06,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-26 11:50:06,037 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:50:06,037 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2023-11-26 11:50:06,038 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:50:06,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:06,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:06,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:06,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:06,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1796875976, now seen corresponding path program 1 times [2023-11-26 11:50:06,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:06,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142814957] [2023-11-26 11:50:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:06,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:06,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:06,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142814957] [2023-11-26 11:50:06,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142814957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:06,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:06,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:50:06,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475951796] [2023-11-26 11:50:06,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:06,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:50:06,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:06,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:50:06,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:50:06,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:50:06,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:06,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:06,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:50:06,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:06,883 INFO L124 PetriNetUnfolderBase]: 321/543 cut-off events. [2023-11-26 11:50:06,883 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 11:50:06,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1055 conditions, 543 events. 321/543 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2187 event pairs, 62 based on Foata normal form. 12/542 useless extension candidates. Maximal degree in co-relation 1045. Up to 221 conditions per place. [2023-11-26 11:50:06,891 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 25 selfloop transitions, 4 changer transitions 22/54 dead transitions. [2023-11-26 11:50:06,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 54 transitions, 216 flow [2023-11-26 11:50:06,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:50:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:50:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2023-11-26 11:50:06,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-26 11:50:06,907 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 84 transitions. [2023-11-26 11:50:06,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 84 transitions. [2023-11-26 11:50:06,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:06,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 84 transitions. [2023-11-26 11:50:06,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:06,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:06,919 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:06,921 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 50 flow. Second operand 6 states and 84 transitions. [2023-11-26 11:50:06,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 54 transitions, 216 flow [2023-11-26 11:50:06,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:06,928 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 71 flow [2023-11-26 11:50:06,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=71, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2023-11-26 11:50:06,934 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2023-11-26 11:50:06,934 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 71 flow [2023-11-26 11:50:06,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:06,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:06,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:06,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:50:06,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:06,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:06,937 INFO L85 PathProgramCache]: Analyzing trace with hash 676521124, now seen corresponding path program 1 times [2023-11-26 11:50:06,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:06,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837248688] [2023-11-26 11:50:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:06,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:07,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:07,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837248688] [2023-11-26 11:50:07,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837248688] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:07,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:07,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:50:07,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266703174] [2023-11-26 11:50:07,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:07,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:50:07,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:07,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:50:07,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:50:07,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:50:07,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 71 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:07,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:07,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:50:07,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:07,498 INFO L124 PetriNetUnfolderBase]: 382/689 cut-off events. [2023-11-26 11:50:07,498 INFO L125 PetriNetUnfolderBase]: For 285/291 co-relation queries the response was YES. [2023-11-26 11:50:07,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1586 conditions, 689 events. 382/689 cut-off events. For 285/291 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2910 event pairs, 65 based on Foata normal form. 33/721 useless extension candidates. Maximal degree in co-relation 1572. Up to 246 conditions per place. [2023-11-26 11:50:07,508 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 46 selfloop transitions, 9 changer transitions 20/78 dead transitions. [2023-11-26 11:50:07,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 78 transitions, 379 flow [2023-11-26 11:50:07,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:50:07,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:50:07,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2023-11-26 11:50:07,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2023-11-26 11:50:07,512 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 117 transitions. [2023-11-26 11:50:07,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 117 transitions. [2023-11-26 11:50:07,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:07,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 117 transitions. [2023-11-26 11:50:07,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:07,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:07,517 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:07,517 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 71 flow. Second operand 9 states and 117 transitions. [2023-11-26 11:50:07,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 78 transitions, 379 flow [2023-11-26 11:50:07,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 78 transitions, 363 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:07,529 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 156 flow [2023-11-26 11:50:07,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=156, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-11-26 11:50:07,530 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2023-11-26 11:50:07,531 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 156 flow [2023-11-26 11:50:07,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:07,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:07,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:07,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:50:07,537 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:07,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:07,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1193097064, now seen corresponding path program 2 times [2023-11-26 11:50:07,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:07,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025066825] [2023-11-26 11:50:07,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:07,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:07,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:07,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025066825] [2023-11-26 11:50:07,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025066825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:07,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:07,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:50:07,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267724985] [2023-11-26 11:50:07,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:07,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:50:07,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:07,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:50:07,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:50:07,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:50:07,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:07,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:07,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:50:07,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:08,076 INFO L124 PetriNetUnfolderBase]: 328/605 cut-off events. [2023-11-26 11:50:08,077 INFO L125 PetriNetUnfolderBase]: For 1004/1016 co-relation queries the response was YES. [2023-11-26 11:50:08,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1734 conditions, 605 events. 328/605 cut-off events. For 1004/1016 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2525 event pairs, 65 based on Foata normal form. 57/661 useless extension candidates. Maximal degree in co-relation 1713. Up to 234 conditions per place. [2023-11-26 11:50:08,082 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 38 selfloop transitions, 9 changer transitions 28/78 dead transitions. [2023-11-26 11:50:08,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 78 transitions, 496 flow [2023-11-26 11:50:08,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:50:08,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 11:50:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2023-11-26 11:50:08,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2023-11-26 11:50:08,085 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 103 transitions. [2023-11-26 11:50:08,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 103 transitions. [2023-11-26 11:50:08,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:08,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 103 transitions. [2023-11-26 11:50:08,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:08,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 24.0) internal successors, (216), 9 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:08,089 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 24.0) internal successors, (216), 9 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:08,089 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 156 flow. Second operand 8 states and 103 transitions. [2023-11-26 11:50:08,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 78 transitions, 496 flow [2023-11-26 11:50:08,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 78 transitions, 488 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:08,097 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 210 flow [2023-11-26 11:50:08,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=210, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2023-11-26 11:50:08,098 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 23 predicate places. [2023-11-26 11:50:08,098 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 210 flow [2023-11-26 11:50:08,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:08,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:08,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:08,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:50:08,099 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:08,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:08,100 INFO L85 PathProgramCache]: Analyzing trace with hash -330137667, now seen corresponding path program 1 times [2023-11-26 11:50:08,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:08,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087516665] [2023-11-26 11:50:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:08,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:08,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:08,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087516665] [2023-11-26 11:50:08,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087516665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:08,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:08,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:50:08,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796338161] [2023-11-26 11:50:08,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:08,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:50:08,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:08,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:50:08,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:50:08,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:50:08,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 210 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:08,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:08,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:50:08,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:08,583 INFO L124 PetriNetUnfolderBase]: 337/617 cut-off events. [2023-11-26 11:50:08,583 INFO L125 PetriNetUnfolderBase]: For 1706/1718 co-relation queries the response was YES. [2023-11-26 11:50:08,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1942 conditions, 617 events. 337/617 cut-off events. For 1706/1718 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2588 event pairs, 68 based on Foata normal form. 30/646 useless extension candidates. Maximal degree in co-relation 1916. Up to 237 conditions per place. [2023-11-26 11:50:08,590 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 46 selfloop transitions, 16 changer transitions 24/89 dead transitions. [2023-11-26 11:50:08,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 607 flow [2023-11-26 11:50:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:50:08,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-26 11:50:08,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2023-11-26 11:50:08,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2023-11-26 11:50:08,595 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 135 transitions. [2023-11-26 11:50:08,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 135 transitions. [2023-11-26 11:50:08,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:08,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 135 transitions. [2023-11-26 11:50:08,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:08,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:08,601 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:08,601 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 210 flow. Second operand 11 states and 135 transitions. [2023-11-26 11:50:08,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 607 flow [2023-11-26 11:50:08,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 540 flow, removed 24 selfloop flow, removed 7 redundant places. [2023-11-26 11:50:08,614 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 279 flow [2023-11-26 11:50:08,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=279, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-11-26 11:50:08,615 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2023-11-26 11:50:08,615 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 279 flow [2023-11-26 11:50:08,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:08,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:08,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:08,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:50:08,616 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:08,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:08,616 INFO L85 PathProgramCache]: Analyzing trace with hash 2091272465, now seen corresponding path program 2 times [2023-11-26 11:50:08,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:08,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145032609] [2023-11-26 11:50:08,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:08,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:08,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:08,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145032609] [2023-11-26 11:50:08,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145032609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:08,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:08,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:50:08,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290445338] [2023-11-26 11:50:08,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:08,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:50:08,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:08,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:50:08,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:50:08,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:50:08,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:08,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:08,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:50:08,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:09,071 INFO L124 PetriNetUnfolderBase]: 508/929 cut-off events. [2023-11-26 11:50:09,071 INFO L125 PetriNetUnfolderBase]: For 3228/3246 co-relation queries the response was YES. [2023-11-26 11:50:09,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3073 conditions, 929 events. 508/929 cut-off events. For 3228/3246 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4226 event pairs, 53 based on Foata normal form. 45/971 useless extension candidates. Maximal degree in co-relation 3046. Up to 253 conditions per place. [2023-11-26 11:50:09,081 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 57 selfloop transitions, 20 changer transitions 23/103 dead transitions. [2023-11-26 11:50:09,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 103 transitions, 771 flow [2023-11-26 11:50:09,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:50:09,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-26 11:50:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2023-11-26 11:50:09,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2023-11-26 11:50:09,083 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 141 transitions. [2023-11-26 11:50:09,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 141 transitions. [2023-11-26 11:50:09,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:09,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 141 transitions. [2023-11-26 11:50:09,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:09,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:09,086 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:09,086 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 279 flow. Second operand 11 states and 141 transitions. [2023-11-26 11:50:09,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 103 transitions, 771 flow [2023-11-26 11:50:09,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 103 transitions, 705 flow, removed 27 selfloop flow, removed 4 redundant places. [2023-11-26 11:50:09,098 INFO L231 Difference]: Finished difference. Result has 65 places, 45 transitions, 376 flow [2023-11-26 11:50:09,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=376, PETRI_PLACES=65, PETRI_TRANSITIONS=45} [2023-11-26 11:50:09,099 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 39 predicate places. [2023-11-26 11:50:09,099 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 45 transitions, 376 flow [2023-11-26 11:50:09,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:09,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:09,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:09,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:50:09,100 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:09,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:09,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1387768189, now seen corresponding path program 3 times [2023-11-26 11:50:09,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:09,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731834514] [2023-11-26 11:50:09,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:09,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:09,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:09,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731834514] [2023-11-26 11:50:09,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731834514] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:09,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:09,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:50:09,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573803956] [2023-11-26 11:50:09,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:09,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:50:09,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:09,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:50:09,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:50:09,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:50:09,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 45 transitions, 376 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:09,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:09,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:50:09,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:09,549 INFO L124 PetriNetUnfolderBase]: 481/884 cut-off events. [2023-11-26 11:50:09,549 INFO L125 PetriNetUnfolderBase]: For 5148/5166 co-relation queries the response was YES. [2023-11-26 11:50:09,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3384 conditions, 884 events. 481/884 cut-off events. For 5148/5166 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3985 event pairs, 59 based on Foata normal form. 63/944 useless extension candidates. Maximal degree in co-relation 3352. Up to 154 conditions per place. [2023-11-26 11:50:09,560 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 45 selfloop transitions, 25 changer transitions 33/106 dead transitions. [2023-11-26 11:50:09,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 106 transitions, 964 flow [2023-11-26 11:50:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:50:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-26 11:50:09,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2023-11-26 11:50:09,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2023-11-26 11:50:09,562 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 138 transitions. [2023-11-26 11:50:09,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 138 transitions. [2023-11-26 11:50:09,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:09,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 138 transitions. [2023-11-26 11:50:09,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:09,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:09,565 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:09,565 INFO L175 Difference]: Start difference. First operand has 65 places, 45 transitions, 376 flow. Second operand 11 states and 138 transitions. [2023-11-26 11:50:09,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 106 transitions, 964 flow [2023-11-26 11:50:09,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 106 transitions, 893 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-11-26 11:50:09,587 INFO L231 Difference]: Finished difference. Result has 73 places, 48 transitions, 475 flow [2023-11-26 11:50:09,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=475, PETRI_PLACES=73, PETRI_TRANSITIONS=48} [2023-11-26 11:50:09,589 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 47 predicate places. [2023-11-26 11:50:09,589 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 48 transitions, 475 flow [2023-11-26 11:50:09,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:09,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:09,590 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:09,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:50:09,590 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:09,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:09,591 INFO L85 PathProgramCache]: Analyzing trace with hash 118051405, now seen corresponding path program 1 times [2023-11-26 11:50:09,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:09,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209014667] [2023-11-26 11:50:09,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:09,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:09,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:09,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209014667] [2023-11-26 11:50:09,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209014667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:09,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934359071] [2023-11-26 11:50:09,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:09,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:09,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:09,768 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:09,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:50:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:09,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:50:09,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:10,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:10,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934359071] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:10,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:10,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-26 11:50:10,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783158069] [2023-11-26 11:50:10,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:10,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:50:10,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:10,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:50:10,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:50:10,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:50:10,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 48 transitions, 475 flow. Second operand has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:10,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:10,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:50:10,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:10,911 INFO L124 PetriNetUnfolderBase]: 589/1094 cut-off events. [2023-11-26 11:50:10,911 INFO L125 PetriNetUnfolderBase]: For 10448/10466 co-relation queries the response was YES. [2023-11-26 11:50:10,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4735 conditions, 1094 events. 589/1094 cut-off events. For 10448/10466 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4684 event pairs, 149 based on Foata normal form. 81/1174 useless extension candidates. Maximal degree in co-relation 4699. Up to 522 conditions per place. [2023-11-26 11:50:10,926 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 67 selfloop transitions, 17 changer transitions 67/154 dead transitions. [2023-11-26 11:50:10,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 154 transitions, 1547 flow [2023-11-26 11:50:10,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 11:50:10,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-26 11:50:10,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 231 transitions. [2023-11-26 11:50:10,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506578947368421 [2023-11-26 11:50:10,929 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 231 transitions. [2023-11-26 11:50:10,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 231 transitions. [2023-11-26 11:50:10,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:10,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 231 transitions. [2023-11-26 11:50:10,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 12.157894736842104) internal successors, (231), 19 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:10,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 24.0) internal successors, (480), 20 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:10,933 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 24.0) internal successors, (480), 20 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:10,933 INFO L175 Difference]: Start difference. First operand has 73 places, 48 transitions, 475 flow. Second operand 19 states and 231 transitions. [2023-11-26 11:50:10,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 154 transitions, 1547 flow [2023-11-26 11:50:10,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 154 transitions, 1448 flow, removed 33 selfloop flow, removed 8 redundant places. [2023-11-26 11:50:10,964 INFO L231 Difference]: Finished difference. Result has 93 places, 54 transitions, 604 flow [2023-11-26 11:50:10,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=604, PETRI_PLACES=93, PETRI_TRANSITIONS=54} [2023-11-26 11:50:10,965 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 67 predicate places. [2023-11-26 11:50:10,965 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 54 transitions, 604 flow [2023-11-26 11:50:10,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:10,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:10,966 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:10,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:50:11,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:11,172 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:11,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:11,172 INFO L85 PathProgramCache]: Analyzing trace with hash 220173143, now seen corresponding path program 2 times [2023-11-26 11:50:11,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:11,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204200061] [2023-11-26 11:50:11,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:11,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:11,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:11,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204200061] [2023-11-26 11:50:11,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204200061] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:11,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086451701] [2023-11-26 11:50:11,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:50:11,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:11,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:11,353 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:11,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:50:11,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:50:11,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:50:11,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:50:11,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:11,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:11,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086451701] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:11,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:11,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-26 11:50:11,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854894533] [2023-11-26 11:50:11,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:11,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:50:11,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:11,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:50:11,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:50:11,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:50:11,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 54 transitions, 604 flow. Second operand has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 13 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:11,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:11,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:50:11,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:12,697 INFO L124 PetriNetUnfolderBase]: 877/1613 cut-off events. [2023-11-26 11:50:12,697 INFO L125 PetriNetUnfolderBase]: For 36545/36563 co-relation queries the response was YES. [2023-11-26 11:50:12,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9220 conditions, 1613 events. 877/1613 cut-off events. For 36545/36563 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 7707 event pairs, 68 based on Foata normal form. 90/1702 useless extension candidates. Maximal degree in co-relation 9174. Up to 312 conditions per place. [2023-11-26 11:50:12,723 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 88 selfloop transitions, 47 changer transitions 80/218 dead transitions. [2023-11-26 11:50:12,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 218 transitions, 2806 flow [2023-11-26 11:50:12,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-26 11:50:12,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-26 11:50:12,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 334 transitions. [2023-11-26 11:50:12,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154320987654321 [2023-11-26 11:50:12,728 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 334 transitions. [2023-11-26 11:50:12,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 334 transitions. [2023-11-26 11:50:12,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:12,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 334 transitions. [2023-11-26 11:50:12,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 12.37037037037037) internal successors, (334), 27 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:12,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 24.0) internal successors, (672), 28 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:12,733 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 24.0) internal successors, (672), 28 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:12,733 INFO L175 Difference]: Start difference. First operand has 93 places, 54 transitions, 604 flow. Second operand 27 states and 334 transitions. [2023-11-26 11:50:12,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 218 transitions, 2806 flow [2023-11-26 11:50:12,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 218 transitions, 2262 flow, removed 261 selfloop flow, removed 12 redundant places. [2023-11-26 11:50:12,781 INFO L231 Difference]: Finished difference. Result has 119 places, 70 transitions, 1007 flow [2023-11-26 11:50:12,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1007, PETRI_PLACES=119, PETRI_TRANSITIONS=70} [2023-11-26 11:50:12,783 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 93 predicate places. [2023-11-26 11:50:12,783 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 70 transitions, 1007 flow [2023-11-26 11:50:12,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 13 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:12,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:12,784 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:12,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:12,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:12,989 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:12,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:12,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1954254190, now seen corresponding path program 1 times [2023-11-26 11:50:12,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:12,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288895858] [2023-11-26 11:50:12,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:12,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:13,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:13,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288895858] [2023-11-26 11:50:13,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288895858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:13,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947682522] [2023-11-26 11:50:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:13,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:13,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:13,154 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:13,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:50:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:13,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:50:13,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:13,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:13,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947682522] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:13,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:13,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-11-26 11:50:13,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050901301] [2023-11-26 11:50:13,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:13,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:50:13,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:13,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:50:13,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:50:13,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:50:13,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 70 transitions, 1007 flow. Second operand has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:13,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:13,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:50:13,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:14,427 INFO L124 PetriNetUnfolderBase]: 1111/2082 cut-off events. [2023-11-26 11:50:14,427 INFO L125 PetriNetUnfolderBase]: For 86450/86456 co-relation queries the response was YES. [2023-11-26 11:50:14,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14592 conditions, 2082 events. 1111/2082 cut-off events. For 86450/86456 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 10768 event pairs, 153 based on Foata normal form. 69/2148 useless extension candidates. Maximal degree in co-relation 14534. Up to 490 conditions per place. [2023-11-26 11:50:14,467 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 99 selfloop transitions, 51 changer transitions 67/220 dead transitions. [2023-11-26 11:50:14,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 220 transitions, 3619 flow [2023-11-26 11:50:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-26 11:50:14,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-26 11:50:14,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 309 transitions. [2023-11-26 11:50:14,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515 [2023-11-26 11:50:14,471 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 309 transitions. [2023-11-26 11:50:14,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 309 transitions. [2023-11-26 11:50:14,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:14,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 309 transitions. [2023-11-26 11:50:14,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 12.36) internal successors, (309), 25 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:14,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 24.0) internal successors, (624), 26 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:14,478 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 24.0) internal successors, (624), 26 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:14,478 INFO L175 Difference]: Start difference. First operand has 119 places, 70 transitions, 1007 flow. Second operand 25 states and 309 transitions. [2023-11-26 11:50:14,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 220 transitions, 3619 flow [2023-11-26 11:50:14,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 220 transitions, 3039 flow, removed 274 selfloop flow, removed 15 redundant places. [2023-11-26 11:50:14,601 INFO L231 Difference]: Finished difference. Result has 135 places, 81 transitions, 1293 flow [2023-11-26 11:50:14,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1293, PETRI_PLACES=135, PETRI_TRANSITIONS=81} [2023-11-26 11:50:14,604 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 109 predicate places. [2023-11-26 11:50:14,604 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 81 transitions, 1293 flow [2023-11-26 11:50:14,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:14,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:14,605 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:14,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:14,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:14,810 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:14,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:14,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1106441918, now seen corresponding path program 2 times [2023-11-26 11:50:14,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:14,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76473982] [2023-11-26 11:50:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:14,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:14,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:14,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76473982] [2023-11-26 11:50:14,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76473982] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:14,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077003161] [2023-11-26 11:50:14,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:50:14,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:14,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:15,000 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:15,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:50:15,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:50:15,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:50:15,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:50:15,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:15,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:15,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077003161] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:15,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:15,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-11-26 11:50:15,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048452353] [2023-11-26 11:50:15,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:15,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:50:15,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:15,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:50:15,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:50:15,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:50:15,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 81 transitions, 1293 flow. Second operand has 15 states, 15 states have (on average 7.133333333333334) internal successors, (107), 15 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:15,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:15,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:50:15,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:16,434 INFO L124 PetriNetUnfolderBase]: 1228/2335 cut-off events. [2023-11-26 11:50:16,434 INFO L125 PetriNetUnfolderBase]: For 138033/138039 co-relation queries the response was YES. [2023-11-26 11:50:16,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17618 conditions, 2335 events. 1228/2335 cut-off events. For 138033/138039 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 12383 event pairs, 65 based on Foata normal form. 141/2473 useless extension candidates. Maximal degree in co-relation 17553. Up to 498 conditions per place. [2023-11-26 11:50:16,473 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 89 selfloop transitions, 76 changer transitions 98/266 dead transitions. [2023-11-26 11:50:16,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 266 transitions, 5157 flow [2023-11-26 11:50:16,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-26 11:50:16,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-26 11:50:16,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 345 transitions. [2023-11-26 11:50:16,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133928571428571 [2023-11-26 11:50:16,477 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 345 transitions. [2023-11-26 11:50:16,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 345 transitions. [2023-11-26 11:50:16,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:16,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 345 transitions. [2023-11-26 11:50:16,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 12.321428571428571) internal successors, (345), 28 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:16,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 24.0) internal successors, (696), 29 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:16,481 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 24.0) internal successors, (696), 29 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:16,482 INFO L175 Difference]: Start difference. First operand has 135 places, 81 transitions, 1293 flow. Second operand 28 states and 345 transitions. [2023-11-26 11:50:16,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 266 transitions, 5157 flow [2023-11-26 11:50:16,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 266 transitions, 4394 flow, removed 348 selfloop flow, removed 18 redundant places. [2023-11-26 11:50:16,623 INFO L231 Difference]: Finished difference. Result has 156 places, 102 transitions, 1928 flow [2023-11-26 11:50:16,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1928, PETRI_PLACES=156, PETRI_TRANSITIONS=102} [2023-11-26 11:50:16,624 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 130 predicate places. [2023-11-26 11:50:16,624 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 102 transitions, 1928 flow [2023-11-26 11:50:16,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.133333333333334) internal successors, (107), 15 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:16,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:16,625 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:16,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:16,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:16,827 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:16,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:16,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1065030028, now seen corresponding path program 3 times [2023-11-26 11:50:16,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:16,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950555275] [2023-11-26 11:50:16,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:16,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:17,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:17,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950555275] [2023-11-26 11:50:17,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950555275] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:17,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299099712] [2023-11-26 11:50:17,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:50:17,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:17,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:17,100 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:17,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:50:17,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-26 11:50:17,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:50:17,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:50:17,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:17,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:17,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299099712] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:17,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:17,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2023-11-26 11:50:17,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640324885] [2023-11-26 11:50:17,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:17,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 11:50:17,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:17,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 11:50:17,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:50:17,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:50:17,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 102 transitions, 1928 flow. Second operand has 23 states, 23 states have (on average 7.086956521739131) internal successors, (163), 23 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:17,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:17,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:50:17,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:19,605 INFO L124 PetriNetUnfolderBase]: 1696/3129 cut-off events. [2023-11-26 11:50:19,606 INFO L125 PetriNetUnfolderBase]: For 259057/259063 co-relation queries the response was YES. [2023-11-26 11:50:19,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27299 conditions, 3129 events. 1696/3129 cut-off events. For 259057/259063 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 15648 event pairs, 42 based on Foata normal form. 96/3224 useless extension candidates. Maximal degree in co-relation 27224. Up to 675 conditions per place. [2023-11-26 11:50:19,736 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 142 selfloop transitions, 112 changer transitions 135/392 dead transitions. [2023-11-26 11:50:19,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 392 transitions, 8374 flow [2023-11-26 11:50:19,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-26 11:50:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-26 11:50:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 565 transitions. [2023-11-26 11:50:19,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117753623188406 [2023-11-26 11:50:19,746 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 565 transitions. [2023-11-26 11:50:19,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 565 transitions. [2023-11-26 11:50:19,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:19,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 565 transitions. [2023-11-26 11:50:19,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 12.282608695652174) internal successors, (565), 46 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:19,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 24.0) internal successors, (1128), 47 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:19,752 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 24.0) internal successors, (1128), 47 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:19,752 INFO L175 Difference]: Start difference. First operand has 156 places, 102 transitions, 1928 flow. Second operand 46 states and 565 transitions. [2023-11-26 11:50:19,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 392 transitions, 8374 flow [2023-11-26 11:50:19,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 392 transitions, 7069 flow, removed 626 selfloop flow, removed 18 redundant places. [2023-11-26 11:50:19,990 INFO L231 Difference]: Finished difference. Result has 203 places, 136 transitions, 3029 flow [2023-11-26 11:50:19,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=3029, PETRI_PLACES=203, PETRI_TRANSITIONS=136} [2023-11-26 11:50:19,991 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 177 predicate places. [2023-11-26 11:50:19,992 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 136 transitions, 3029 flow [2023-11-26 11:50:19,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.086956521739131) internal successors, (163), 23 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:19,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:19,992 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:19,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:20,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:20,198 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:20,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:20,198 INFO L85 PathProgramCache]: Analyzing trace with hash 986663667, now seen corresponding path program 4 times [2023-11-26 11:50:20,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:20,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612601976] [2023-11-26 11:50:20,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:20,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:20,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:20,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612601976] [2023-11-26 11:50:20,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612601976] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:20,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804471342] [2023-11-26 11:50:20,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:50:20,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:20,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:20,696 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:20,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:50:20,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:50:20,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:50:20,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:50:20,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:21,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:21,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804471342] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:21,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:21,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2023-11-26 11:50:21,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348406594] [2023-11-26 11:50:21,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:21,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-26 11:50:21,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:21,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-26 11:50:21,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2023-11-26 11:50:21,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:50:21,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 136 transitions, 3029 flow. Second operand has 35 states, 35 states have (on average 7.0285714285714285) internal successors, (246), 35 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:21,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:21,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:50:21,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:24,814 INFO L124 PetriNetUnfolderBase]: 2200/4218 cut-off events. [2023-11-26 11:50:24,815 INFO L125 PetriNetUnfolderBase]: For 588331/588337 co-relation queries the response was YES. [2023-11-26 11:50:24,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45569 conditions, 4218 events. 2200/4218 cut-off events. For 588331/588337 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 21815 event pairs, 421 based on Foata normal form. 159/4374 useless extension candidates. Maximal degree in co-relation 45476. Up to 1483 conditions per place. [2023-11-26 11:50:24,899 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 190 selfloop transitions, 99 changer transitions 189/481 dead transitions. [2023-11-26 11:50:24,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 481 transitions, 13780 flow [2023-11-26 11:50:24,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-26 11:50:24,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-11-26 11:50:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 653 transitions. [2023-11-26 11:50:24,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946969696969697 [2023-11-26 11:50:24,911 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 653 transitions. [2023-11-26 11:50:24,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 653 transitions. [2023-11-26 11:50:24,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:24,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 653 transitions. [2023-11-26 11:50:24,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 11.872727272727273) internal successors, (653), 55 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:24,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 24.0) internal successors, (1344), 56 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:24,928 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 24.0) internal successors, (1344), 56 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:24,928 INFO L175 Difference]: Start difference. First operand has 203 places, 136 transitions, 3029 flow. Second operand 55 states and 653 transitions. [2023-11-26 11:50:24,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 481 transitions, 13780 flow [2023-11-26 11:50:25,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 481 transitions, 10075 flow, removed 1813 selfloop flow, removed 29 redundant places. [2023-11-26 11:50:25,827 INFO L231 Difference]: Finished difference. Result has 251 places, 178 transitions, 3928 flow [2023-11-26 11:50:25,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2048, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=3928, PETRI_PLACES=251, PETRI_TRANSITIONS=178} [2023-11-26 11:50:25,828 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 225 predicate places. [2023-11-26 11:50:25,829 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 178 transitions, 3928 flow [2023-11-26 11:50:25,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 7.0285714285714285) internal successors, (246), 35 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:25,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:25,830 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:25,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:26,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:26,035 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:26,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:26,036 INFO L85 PathProgramCache]: Analyzing trace with hash -616336393, now seen corresponding path program 5 times [2023-11-26 11:50:26,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:26,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844991121] [2023-11-26 11:50:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:26,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:26,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:26,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844991121] [2023-11-26 11:50:26,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844991121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:26,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709802872] [2023-11-26 11:50:26,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:50:26,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:26,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:26,586 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:26,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:50:26,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-26 11:50:26,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:50:26,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:50:26,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:26,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:27,492 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:27,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709802872] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:27,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:27,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2023-11-26 11:50:27,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938568117] [2023-11-26 11:50:27,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:27,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-26 11:50:27,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:27,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-26 11:50:27,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2023-11-26 11:50:27,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:50:27,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 178 transitions, 3928 flow. Second operand has 36 states, 36 states have (on average 7.055555555555555) internal successors, (254), 36 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:27,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:27,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:50:27,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:31,679 INFO L124 PetriNetUnfolderBase]: 2749/5471 cut-off events. [2023-11-26 11:50:31,679 INFO L125 PetriNetUnfolderBase]: For 983023/983029 co-relation queries the response was YES. [2023-11-26 11:50:31,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61224 conditions, 5471 events. 2749/5471 cut-off events. For 983023/983029 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 30914 event pairs, 194 based on Foata normal form. 159/5629 useless extension candidates. Maximal degree in co-relation 61116. Up to 1377 conditions per place. [2023-11-26 11:50:31,798 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 180 selfloop transitions, 191 changer transitions 201/575 dead transitions. [2023-11-26 11:50:31,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 575 transitions, 16514 flow [2023-11-26 11:50:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-26 11:50:31,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-11-26 11:50:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 730 transitions. [2023-11-26 11:50:31,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49863387978142076 [2023-11-26 11:50:31,803 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 730 transitions. [2023-11-26 11:50:31,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 730 transitions. [2023-11-26 11:50:31,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:31,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 730 transitions. [2023-11-26 11:50:31,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 11.967213114754099) internal successors, (730), 61 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:31,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 24.0) internal successors, (1488), 62 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:31,812 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 24.0) internal successors, (1488), 62 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:31,812 INFO L175 Difference]: Start difference. First operand has 251 places, 178 transitions, 3928 flow. Second operand 61 states and 730 transitions. [2023-11-26 11:50:31,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 575 transitions, 16514 flow [2023-11-26 11:50:33,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 575 transitions, 13988 flow, removed 1228 selfloop flow, removed 31 redundant places. [2023-11-26 11:50:33,798 INFO L231 Difference]: Finished difference. Result has 299 places, 239 transitions, 5953 flow [2023-11-26 11:50:33,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=5953, PETRI_PLACES=299, PETRI_TRANSITIONS=239} [2023-11-26 11:50:33,799 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 273 predicate places. [2023-11-26 11:50:33,799 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 239 transitions, 5953 flow [2023-11-26 11:50:33,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 7.055555555555555) internal successors, (254), 36 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:33,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:33,800 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:33,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:34,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:50:34,002 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:34,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:34,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1304479199, now seen corresponding path program 6 times [2023-11-26 11:50:34,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:34,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926280998] [2023-11-26 11:50:34,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:34,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:34,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:34,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926280998] [2023-11-26 11:50:34,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926280998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:34,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672622605] [2023-11-26 11:50:34,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:50:34,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:34,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:34,401 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:34,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:50:34,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-26 11:50:34,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:50:34,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-26 11:50:34,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:34,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:35,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672622605] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:35,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:35,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2023-11-26 11:50:35,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854566627] [2023-11-26 11:50:35,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:35,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-26 11:50:35,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:35,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-26 11:50:35,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2023-11-26 11:50:35,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:50:35,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 239 transitions, 5953 flow. Second operand has 35 states, 35 states have (on average 7.0285714285714285) internal successors, (246), 35 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:35,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:35,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:50:35,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:40,708 INFO L124 PetriNetUnfolderBase]: 3676/7264 cut-off events. [2023-11-26 11:50:40,708 INFO L125 PetriNetUnfolderBase]: For 1938305/1938311 co-relation queries the response was YES. [2023-11-26 11:50:40,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95376 conditions, 7264 events. 3676/7264 cut-off events. For 1938305/1938311 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 42431 event pairs, 83 based on Foata normal form. 159/7420 useless extension candidates. Maximal degree in co-relation 95250. Up to 1824 conditions per place. [2023-11-26 11:50:40,866 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 226 selfloop transitions, 272 changer transitions 205/706 dead transitions. [2023-11-26 11:50:40,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 706 transitions, 23605 flow [2023-11-26 11:50:40,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-26 11:50:40,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-11-26 11:50:40,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 868 transitions. [2023-11-26 11:50:40,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5093896713615024 [2023-11-26 11:50:40,870 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 868 transitions. [2023-11-26 11:50:40,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 868 transitions. [2023-11-26 11:50:40,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:40,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 868 transitions. [2023-11-26 11:50:40,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 12.225352112676056) internal successors, (868), 71 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:40,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 24.0) internal successors, (1728), 72 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:40,880 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 24.0) internal successors, (1728), 72 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:40,880 INFO L175 Difference]: Start difference. First operand has 299 places, 239 transitions, 5953 flow. Second operand 71 states and 868 transitions. [2023-11-26 11:50:40,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 706 transitions, 23605 flow [2023-11-26 11:50:44,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 706 transitions, 19751 flow, removed 1881 selfloop flow, removed 31 redundant places. [2023-11-26 11:50:44,627 INFO L231 Difference]: Finished difference. Result has 363 places, 300 transitions, 8467 flow [2023-11-26 11:50:44,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=8467, PETRI_PLACES=363, PETRI_TRANSITIONS=300} [2023-11-26 11:50:44,628 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 337 predicate places. [2023-11-26 11:50:44,629 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 300 transitions, 8467 flow [2023-11-26 11:50:44,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 7.0285714285714285) internal successors, (246), 35 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:44,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:44,629 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:44,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:44,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:44,835 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:44,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:44,836 INFO L85 PathProgramCache]: Analyzing trace with hash 111097055, now seen corresponding path program 7 times [2023-11-26 11:50:44,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:44,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517363329] [2023-11-26 11:50:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:44,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:45,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:45,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517363329] [2023-11-26 11:50:45,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517363329] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:45,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567905702] [2023-11-26 11:50:45,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 11:50:45,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:45,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:45,435 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:45,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd83732-f00d-4ff6-b779-4bbcdf2c885d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:50:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:45,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-26 11:50:45,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:45,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:46,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567905702] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:46,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:46,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2023-11-26 11:50:46,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353749474] [2023-11-26 11:50:46,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:46,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-26 11:50:46,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:46,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-26 11:50:46,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1519, Unknown=0, NotChecked=0, Total=1980 [2023-11-26 11:50:46,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-26 11:50:46,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 300 transitions, 8467 flow. Second operand has 45 states, 45 states have (on average 7.044444444444444) internal successors, (317), 45 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:46,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:46,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-26 11:50:46,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand