./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya --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 647bb9f2bc4e44b8324ce986a0773d034e56e6ec110a9fd5233f5c8c0dbbeb10 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:58:41,125 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:58:41,189 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:58:41,193 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:58:41,194 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:58:41,218 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:58:41,218 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:58:41,219 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:58:41,220 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:58:41,220 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:58:41,221 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:58:41,221 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:58:41,222 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:58:41,223 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:58:41,223 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:58:41,224 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:58:41,224 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:58:41,225 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:58:41,225 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:58:41,226 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:58:41,226 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:58:41,227 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:58:41,228 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:58:41,228 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:58:41,228 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:58:41,229 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:58:41,229 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:58:41,230 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:58:41,230 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:58:41,231 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:58:41,231 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:58:41,231 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:58:41,232 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:58:41,232 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:58:41,232 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:58:41,233 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:58:41,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:58:41,233 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:58:41,233 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:58:41,233 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:58:41,234 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:58:41,234 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:58:41,234 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_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 647bb9f2bc4e44b8324ce986a0773d034e56e6ec110a9fd5233f5c8c0dbbeb10 [2023-11-29 02:58:41,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:58:41,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:58:41,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:58:41,491 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:58:41,491 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:58:41,492 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread/triangular-longer-2.i [2023-11-29 02:58:44,211 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:58:44,449 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:58:44,450 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/sv-benchmarks/c/pthread/triangular-longer-2.i [2023-11-29 02:58:44,469 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/data/d4dda6068/041ac3d2602748f0ab4b69cf3d169ca8/FLAGe7222a8b6 [2023-11-29 02:58:44,482 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/data/d4dda6068/041ac3d2602748f0ab4b69cf3d169ca8 [2023-11-29 02:58:44,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:58:44,486 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:58:44,488 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:58:44,488 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:58:44,500 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:58:44,501 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:58:44" (1/1) ... [2023-11-29 02:58:44,502 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75794709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:58:44, skipping insertion in model container [2023-11-29 02:58:44,502 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:58:44" (1/1) ... [2023-11-29 02:58:44,553 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:58:44,854 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_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/sv-benchmarks/c/pthread/triangular-longer-2.i[30963,30976] [2023-11-29 02:58:44,859 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:58:44,868 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:58:44,904 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_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/sv-benchmarks/c/pthread/triangular-longer-2.i[30963,30976] [2023-11-29 02:58:44,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:58:44,935 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:58:44,936 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:58:44,944 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:58:44,944 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:58:44 WrapperNode [2023-11-29 02:58:44,945 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:58:44,946 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:58:44,946 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:58:44,946 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:58:44,954 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:58:44" (1/1) ... [2023-11-29 02:58:44,967 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:58:44" (1/1) ... [2023-11-29 02:58:44,988 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2023-11-29 02:58:44,988 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:58:44,989 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:58:44,989 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:58:44,989 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:58:45,001 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:58:44" (1/1) ... [2023-11-29 02:58:45,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:58:44" (1/1) ... [2023-11-29 02:58:45,004 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:58:44" (1/1) ... [2023-11-29 02:58:45,018 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]. [2023-11-29 02:58:45,019 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:58:44" (1/1) ... [2023-11-29 02:58:45,019 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:58:44" (1/1) ... [2023-11-29 02:58:45,024 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:58:44" (1/1) ... [2023-11-29 02:58:45,027 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:58:44" (1/1) ... [2023-11-29 02:58:45,029 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:58:44" (1/1) ... [2023-11-29 02:58:45,031 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:58:44" (1/1) ... [2023-11-29 02:58:45,033 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:58:45,034 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:58:45,035 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:58:45,035 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:58:45,035 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:58:44" (1/1) ... [2023-11-29 02:58:45,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:58:45,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:58:45,064 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:58:45,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:58:45,101 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-29 02:58:45,101 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-29 02:58:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-29 02:58:45,102 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-29 02:58:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:58:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:58:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:58:45,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 02:58:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:58:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:58:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:58:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:58:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:58:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:58:45,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 02:58:45,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:58:45,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:58:45,106 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 02:58:45,237 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:58:45,238 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:58:45,349 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:58:45,437 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:58:45,438 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 02:58:45,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:58:45 BoogieIcfgContainer [2023-11-29 02:58:45,438 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:58:45,441 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:58:45,441 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:58:45,445 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:58:45,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:58:44" (1/3) ... [2023-11-29 02:58:45,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72592860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:58:45, skipping insertion in model container [2023-11-29 02:58:45,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:58:44" (2/3) ... [2023-11-29 02:58:45,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72592860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:58:45, skipping insertion in model container [2023-11-29 02:58:45,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:58:45" (3/3) ... [2023-11-29 02:58:45,447 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2023-11-29 02:58:45,456 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 02:58:45,467 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:58:45,468 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:58:45,468 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:58:45,502 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 02:58:45,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 56 flow [2023-11-29 02:58:45,581 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2023-11-29 02:58:45,582 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:58:45,585 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. [2023-11-29 02:58:45,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 56 flow [2023-11-29 02:58:45,588 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 22 transitions, 50 flow [2023-11-29 02:58:45,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:58:45,605 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;@476206ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:58:45,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 02:58:45,616 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:58:45,616 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2023-11-29 02:58:45,616 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:58:45,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:58:45,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:58:45,618 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:58:45,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:58:45,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1796875976, now seen corresponding path program 1 times [2023-11-29 02:58:45,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:58:45,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194602628] [2023-11-29 02:58:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:45,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:58:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:58:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:46,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:58:46,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194602628] [2023-11-29 02:58:46,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194602628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:58:46,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:58:46,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:58:46,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646952090] [2023-11-29 02:58:46,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:58:46,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:58:46,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:58:46,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:58:46,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:58:46,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-29 02:58:46,109 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) [2023-11-29 02:58:46,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:58:46,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-29 02:58:46,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:58:46,347 INFO L124 PetriNetUnfolderBase]: 321/543 cut-off events. [2023-11-29 02:58:46,347 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 02:58:46,350 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. [2023-11-29 02:58:46,354 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 25 selfloop transitions, 4 changer transitions 22/54 dead transitions. [2023-11-29 02:58:46,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 54 transitions, 216 flow [2023-11-29 02:58:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:58:46,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:58:46,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2023-11-29 02:58:46,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-29 02:58:46,366 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 84 transitions. [2023-11-29 02:58:46,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 84 transitions. [2023-11-29 02:58:46,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:58:46,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 84 transitions. [2023-11-29 02:58:46,371 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) [2023-11-29 02:58:46,374 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) [2023-11-29 02:58:46,375 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) [2023-11-29 02:58:46,377 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 50 flow. Second operand 6 states and 84 transitions. [2023-11-29 02:58:46,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 54 transitions, 216 flow [2023-11-29 02:58:46,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:58:46,381 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 71 flow [2023-11-29 02:58:46,383 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} [2023-11-29 02:58:46,387 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2023-11-29 02:58:46,387 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 71 flow [2023-11-29 02:58:46,387 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) [2023-11-29 02:58:46,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:58:46,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:58:46,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:58:46,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:58:46,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:58:46,389 INFO L85 PathProgramCache]: Analyzing trace with hash 676521124, now seen corresponding path program 1 times [2023-11-29 02:58:46,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:58:46,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31524265] [2023-11-29 02:58:46,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:46,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:58:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:58:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:46,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:58:46,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31524265] [2023-11-29 02:58:46,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31524265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:58:46,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:58:46,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:58:46,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980737891] [2023-11-29 02:58:46,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:58:46,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:58:46,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:58:46,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:58:46,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:58:46,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-29 02:58:46,597 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) [2023-11-29 02:58:46,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:58:46,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-29 02:58:46,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:58:46,808 INFO L124 PetriNetUnfolderBase]: 382/689 cut-off events. [2023-11-29 02:58:46,808 INFO L125 PetriNetUnfolderBase]: For 285/291 co-relation queries the response was YES. [2023-11-29 02:58:46,811 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. [2023-11-29 02:58:46,816 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 46 selfloop transitions, 9 changer transitions 20/78 dead transitions. [2023-11-29 02:58:46,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 78 transitions, 379 flow [2023-11-29 02:58:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:58:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 02:58:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2023-11-29 02:58:46,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2023-11-29 02:58:46,819 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 117 transitions. [2023-11-29 02:58:46,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 117 transitions. [2023-11-29 02:58:46,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:58:46,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 117 transitions. [2023-11-29 02:58:46,821 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) [2023-11-29 02:58:46,823 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) [2023-11-29 02:58:46,823 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) [2023-11-29 02:58:46,823 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 71 flow. Second operand 9 states and 117 transitions. [2023-11-29 02:58:46,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 78 transitions, 379 flow [2023-11-29 02:58:46,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 78 transitions, 363 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-29 02:58:46,830 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 156 flow [2023-11-29 02:58:46,830 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} [2023-11-29 02:58:46,831 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2023-11-29 02:58:46,831 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 156 flow [2023-11-29 02:58:46,831 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) [2023-11-29 02:58:46,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:58:46,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:58:46,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:58:46,832 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:58:46,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:58:46,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1193097064, now seen corresponding path program 2 times [2023-11-29 02:58:46,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:58:46,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104690483] [2023-11-29 02:58:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:46,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:58:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:58:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:46,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:58:46,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104690483] [2023-11-29 02:58:46,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104690483] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:58:46,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:58:46,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:58:46,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315992217] [2023-11-29 02:58:46,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:58:46,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:58:46,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:58:46,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:58:46,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:58:46,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-29 02:58:46,978 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) [2023-11-29 02:58:46,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:58:46,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-29 02:58:46,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:58:47,222 INFO L124 PetriNetUnfolderBase]: 373/686 cut-off events. [2023-11-29 02:58:47,222 INFO L125 PetriNetUnfolderBase]: For 1124/1136 co-relation queries the response was YES. [2023-11-29 02:58:47,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1953 conditions, 686 events. 373/686 cut-off events. For 1124/1136 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2965 event pairs, 80 based on Foata normal form. 48/733 useless extension candidates. Maximal degree in co-relation 1932. Up to 237 conditions per place. [2023-11-29 02:58:47,227 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 42 selfloop transitions, 15 changer transitions 32/92 dead transitions. [2023-11-29 02:58:47,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 92 transitions, 578 flow [2023-11-29 02:58:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:58:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 02:58:47,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2023-11-29 02:58:47,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2023-11-29 02:58:47,229 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 126 transitions. [2023-11-29 02:58:47,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 126 transitions. [2023-11-29 02:58:47,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:58:47,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 126 transitions. [2023-11-29 02:58:47,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:58:47,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:58:47,233 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:58:47,233 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 156 flow. Second operand 10 states and 126 transitions. [2023-11-29 02:58:47,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 92 transitions, 578 flow [2023-11-29 02:58:47,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 92 transitions, 568 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-29 02:58:47,241 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 270 flow [2023-11-29 02:58:47,242 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=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=270, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2023-11-29 02:58:47,242 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 27 predicate places. [2023-11-29 02:58:47,243 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 270 flow [2023-11-29 02:58:47,243 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) [2023-11-29 02:58:47,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:58:47,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:58:47,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:58:47,244 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:58:47,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:58:47,244 INFO L85 PathProgramCache]: Analyzing trace with hash 511996707, now seen corresponding path program 1 times [2023-11-29 02:58:47,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:58:47,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796338161] [2023-11-29 02:58:47,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:47,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:58:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:58:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:47,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:58:47,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796338161] [2023-11-29 02:58:47,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796338161] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:58:47,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:58:47,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:58:47,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529003462] [2023-11-29 02:58:47,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:58:47,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:58:47,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:58:47,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:58:47,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:58:47,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-29 02:58:47,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 270 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) [2023-11-29 02:58:47,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:58:47,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-29 02:58:47,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:58:47,663 INFO L124 PetriNetUnfolderBase]: 508/929 cut-off events. [2023-11-29 02:58:47,663 INFO L125 PetriNetUnfolderBase]: For 3601/3613 co-relation queries the response was YES. [2023-11-29 02:58:47,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3131 conditions, 929 events. 508/929 cut-off events. For 3601/3613 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4227 event pairs, 53 based on Foata normal form. 39/965 useless extension candidates. Maximal degree in co-relation 3103. Up to 238 conditions per place. [2023-11-29 02:58:47,670 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 56 selfloop transitions, 21 changer transitions 23/103 dead transitions. [2023-11-29 02:58:47,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 103 transitions, 774 flow [2023-11-29 02:58:47,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:58:47,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 02:58:47,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2023-11-29 02:58:47,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2023-11-29 02:58:47,672 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 141 transitions. [2023-11-29 02:58:47,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 141 transitions. [2023-11-29 02:58:47,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:58:47,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 141 transitions. [2023-11-29 02:58:47,674 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) [2023-11-29 02:58:47,675 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) [2023-11-29 02:58:47,675 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) [2023-11-29 02:58:47,675 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 270 flow. Second operand 11 states and 141 transitions. [2023-11-29 02:58:47,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 103 transitions, 774 flow [2023-11-29 02:58:47,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 103 transitions, 709 flow, removed 29 selfloop flow, removed 4 redundant places. [2023-11-29 02:58:47,688 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 378 flow [2023-11-29 02:58:47,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=378, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2023-11-29 02:58:47,689 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 37 predicate places. [2023-11-29 02:58:47,689 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 378 flow [2023-11-29 02:58:47,689 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) [2023-11-29 02:58:47,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:58:47,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:58:47,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 02:58:47,690 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:58:47,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:58:47,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1387768189, now seen corresponding path program 2 times [2023-11-29 02:58:47,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:58:47,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290445338] [2023-11-29 02:58:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:47,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:58:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:58:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:47,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:58:47,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290445338] [2023-11-29 02:58:47,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290445338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:58:47,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:58:47,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:58:47,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162864669] [2023-11-29 02:58:47,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:58:47,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:58:47,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:58:47,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:58:47,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:58:47,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-29 02:58:47,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 378 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) [2023-11-29 02:58:47,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:58:47,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-29 02:58:47,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:58:48,105 INFO L124 PetriNetUnfolderBase]: 481/884 cut-off events. [2023-11-29 02:58:48,105 INFO L125 PetriNetUnfolderBase]: For 5426/5438 co-relation queries the response was YES. [2023-11-29 02:58:48,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3397 conditions, 884 events. 481/884 cut-off events. For 5426/5438 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4018 event pairs, 59 based on Foata normal form. 57/938 useless extension candidates. Maximal degree in co-relation 3364. Up to 154 conditions per place. [2023-11-29 02:58:48,111 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 45 selfloop transitions, 25 changer transitions 33/106 dead transitions. [2023-11-29 02:58:48,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 106 transitions, 970 flow [2023-11-29 02:58:48,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:58:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 02:58:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2023-11-29 02:58:48,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2023-11-29 02:58:48,113 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 138 transitions. [2023-11-29 02:58:48,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 138 transitions. [2023-11-29 02:58:48,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:58:48,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 138 transitions. [2023-11-29 02:58:48,115 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) [2023-11-29 02:58:48,116 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) [2023-11-29 02:58:48,116 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) [2023-11-29 02:58:48,116 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 378 flow. Second operand 11 states and 138 transitions. [2023-11-29 02:58:48,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 106 transitions, 970 flow [2023-11-29 02:58:48,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 106 transitions, 893 flow, removed 27 selfloop flow, removed 6 redundant places. [2023-11-29 02:58:48,130 INFO L231 Difference]: Finished difference. Result has 70 places, 48 transitions, 474 flow [2023-11-29 02:58:48,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=54, 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=474, PETRI_PLACES=70, PETRI_TRANSITIONS=48} [2023-11-29 02:58:48,131 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 44 predicate places. [2023-11-29 02:58:48,131 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 48 transitions, 474 flow [2023-11-29 02:58:48,132 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) [2023-11-29 02:58:48,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:58:48,132 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:58:48,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 02:58:48,132 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:58:48,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:58:48,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1865532765, now seen corresponding path program 1 times [2023-11-29 02:58:48,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:58:48,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573803956] [2023-11-29 02:58:48,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:48,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:58:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:58:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:48,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:58:48,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573803956] [2023-11-29 02:58:48,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573803956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:58:48,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209014667] [2023-11-29 02:58:48,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:48,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:58:48,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:58:48,276 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:58:48,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:58:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:58:48,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:58:48,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:58:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:48,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:58:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:48,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209014667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:58:48,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:58:48,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-29 02:58:48,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048566575] [2023-11-29 02:58:48,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:58:48,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:58:48,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:58:48,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:58:48,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:58:48,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-29 02:58:48,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 48 transitions, 474 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) [2023-11-29 02:58:48,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:58:48,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-29 02:58:48,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:58:49,165 INFO L124 PetriNetUnfolderBase]: 589/1094 cut-off events. [2023-11-29 02:58:49,165 INFO L125 PetriNetUnfolderBase]: For 10657/10669 co-relation queries the response was YES. [2023-11-29 02:58:49,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4723 conditions, 1094 events. 589/1094 cut-off events. For 10657/10669 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4723 event pairs, 149 based on Foata normal form. 75/1168 useless extension candidates. Maximal degree in co-relation 4687. Up to 486 conditions per place. [2023-11-29 02:58:49,175 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 65 selfloop transitions, 19 changer transitions 67/154 dead transitions. [2023-11-29 02:58:49,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 154 transitions, 1546 flow [2023-11-29 02:58:49,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 02:58:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 02:58:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 231 transitions. [2023-11-29 02:58:49,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506578947368421 [2023-11-29 02:58:49,177 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 231 transitions. [2023-11-29 02:58:49,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 231 transitions. [2023-11-29 02:58:49,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:58:49,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 231 transitions. [2023-11-29 02:58:49,179 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) [2023-11-29 02:58:49,181 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) [2023-11-29 02:58:49,181 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) [2023-11-29 02:58:49,181 INFO L175 Difference]: Start difference. First operand has 70 places, 48 transitions, 474 flow. Second operand 19 states and 231 transitions. [2023-11-29 02:58:49,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 154 transitions, 1546 flow [2023-11-29 02:58:49,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 154 transitions, 1431 flow, removed 40 selfloop flow, removed 9 redundant places. [2023-11-29 02:58:49,207 INFO L231 Difference]: Finished difference. Result has 89 places, 54 transitions, 604 flow [2023-11-29 02:58:49,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=604, PETRI_PLACES=89, PETRI_TRANSITIONS=54} [2023-11-29 02:58:49,208 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 63 predicate places. [2023-11-29 02:58:49,208 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 54 transitions, 604 flow [2023-11-29 02:58:49,208 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) [2023-11-29 02:58:49,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:58:49,208 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:58:49,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:58:49,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 02:58:49,409 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:58:49,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:58:49,410 INFO L85 PathProgramCache]: Analyzing trace with hash 220173143, now seen corresponding path program 2 times [2023-11-29 02:58:49,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:58:49,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783158069] [2023-11-29 02:58:49,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:49,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:58:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:58:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:49,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:58:49,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783158069] [2023-11-29 02:58:49,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783158069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:58:49,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204200061] [2023-11-29 02:58:49,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:58:49,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:58:49,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:58:49,538 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:58:49,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:58:49,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:58:49,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:58:49,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:58:49,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:58:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:49,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:58:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:49,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204200061] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:58:49,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:58:49,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-29 02:58:49,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510103187] [2023-11-29 02:58:49,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:58:49,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:58:49,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:58:49,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:58:49,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:58:49,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-29 02:58:49,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 54 transitions, 604 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) [2023-11-29 02:58:49,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:58:49,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-29 02:58:49,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:58:50,538 INFO L124 PetriNetUnfolderBase]: 877/1613 cut-off events. [2023-11-29 02:58:50,538 INFO L125 PetriNetUnfolderBase]: For 35599/35611 co-relation queries the response was YES. [2023-11-29 02:58:50,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9105 conditions, 1613 events. 877/1613 cut-off events. For 35599/35611 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7739 event pairs, 68 based on Foata normal form. 84/1696 useless extension candidates. Maximal degree in co-relation 9060. Up to 309 conditions per place. [2023-11-29 02:58:50,552 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 88 selfloop transitions, 47 changer transitions 80/218 dead transitions. [2023-11-29 02:58:50,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 218 transitions, 2790 flow [2023-11-29 02:58:50,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 02:58:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 02:58:50,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 334 transitions. [2023-11-29 02:58:50,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154320987654321 [2023-11-29 02:58:50,555 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 334 transitions. [2023-11-29 02:58:50,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 334 transitions. [2023-11-29 02:58:50,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:58:50,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 334 transitions. [2023-11-29 02:58:50,556 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) [2023-11-29 02:58:50,558 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) [2023-11-29 02:58:50,559 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) [2023-11-29 02:58:50,559 INFO L175 Difference]: Start difference. First operand has 89 places, 54 transitions, 604 flow. Second operand 27 states and 334 transitions. [2023-11-29 02:58:50,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 218 transitions, 2790 flow [2023-11-29 02:58:50,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 218 transitions, 2181 flow, removed 292 selfloop flow, removed 12 redundant places. [2023-11-29 02:58:50,587 INFO L231 Difference]: Finished difference. Result has 115 places, 70 transitions, 986 flow [2023-11-29 02:58:50,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=70, 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=986, PETRI_PLACES=115, PETRI_TRANSITIONS=70} [2023-11-29 02:58:50,588 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 89 predicate places. [2023-11-29 02:58:50,588 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 70 transitions, 986 flow [2023-11-29 02:58:50,588 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) [2023-11-29 02:58:50,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:58:50,588 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:58:50,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:58:50,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:58:50,789 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:58:50,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:58:50,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1954254190, now seen corresponding path program 1 times [2023-11-29 02:58:50,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:58:50,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854894533] [2023-11-29 02:58:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:50,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:58:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:58:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:50,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:58:50,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854894533] [2023-11-29 02:58:50,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854894533] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:58:50,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321206660] [2023-11-29 02:58:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:50,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:58:50,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:58:50,933 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:58:50,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:58:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:58:51,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:58:51,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:58:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:51,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:58:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:51,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321206660] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:58:51,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:58:51,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-11-29 02:58:51,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132378073] [2023-11-29 02:58:51,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:58:51,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:58:51,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:58:51,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:58:51,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:58:51,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-29 02:58:51,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 70 transitions, 986 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) [2023-11-29 02:58:51,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:58:51,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-29 02:58:51,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:58:52,047 INFO L124 PetriNetUnfolderBase]: 1111/2082 cut-off events. [2023-11-29 02:58:52,047 INFO L125 PetriNetUnfolderBase]: For 80186/80192 co-relation queries the response was YES. [2023-11-29 02:58:52,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14171 conditions, 2082 events. 1111/2082 cut-off events. For 80186/80192 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 10797 event pairs, 153 based on Foata normal form. 69/2148 useless extension candidates. Maximal degree in co-relation 14114. Up to 490 conditions per place. [2023-11-29 02:58:52,069 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 99 selfloop transitions, 51 changer transitions 67/220 dead transitions. [2023-11-29 02:58:52,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 220 transitions, 3534 flow [2023-11-29 02:58:52,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 02:58:52,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 02:58:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 309 transitions. [2023-11-29 02:58:52,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515 [2023-11-29 02:58:52,071 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 309 transitions. [2023-11-29 02:58:52,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 309 transitions. [2023-11-29 02:58:52,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:58:52,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 309 transitions. [2023-11-29 02:58:52,073 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) [2023-11-29 02:58:52,074 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) [2023-11-29 02:58:52,074 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) [2023-11-29 02:58:52,074 INFO L175 Difference]: Start difference. First operand has 115 places, 70 transitions, 986 flow. Second operand 25 states and 309 transitions. [2023-11-29 02:58:52,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 220 transitions, 3534 flow [2023-11-29 02:58:52,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 220 transitions, 2960 flow, removed 271 selfloop flow, removed 13 redundant places. [2023-11-29 02:58:52,139 INFO L231 Difference]: Finished difference. Result has 133 places, 81 transitions, 1268 flow [2023-11-29 02:58:52,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=94, 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=1268, PETRI_PLACES=133, PETRI_TRANSITIONS=81} [2023-11-29 02:58:52,140 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 107 predicate places. [2023-11-29 02:58:52,140 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 81 transitions, 1268 flow [2023-11-29 02:58:52,140 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) [2023-11-29 02:58:52,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:58:52,141 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:58:52,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:58:52,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 02:58:52,342 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:58:52,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:58:52,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1106441918, now seen corresponding path program 2 times [2023-11-29 02:58:52,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:58:52,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639700742] [2023-11-29 02:58:52,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:52,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:58:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:58:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:52,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:58:52,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639700742] [2023-11-29 02:58:52,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639700742] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:58:52,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698845542] [2023-11-29 02:58:52,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:58:52,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:58:52,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:58:52,454 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:58:52,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:58:52,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:58:52,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:58:52,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:58:52,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:58:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:52,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:58:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:52,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698845542] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:58:52,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:58:52,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-29 02:58:52,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246097228] [2023-11-29 02:58:52,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:58:52,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 02:58:52,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:58:52,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 02:58:52,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:58:52,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-29 02:58:52,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 81 transitions, 1268 flow. Second operand has 16 states, 16 states have (on average 7.0625) internal successors, (113), 16 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:58:52,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:58:52,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-29 02:58:52,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:58:53,695 INFO L124 PetriNetUnfolderBase]: 1192/2266 cut-off events. [2023-11-29 02:58:53,695 INFO L125 PetriNetUnfolderBase]: For 122228/122234 co-relation queries the response was YES. [2023-11-29 02:58:53,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16461 conditions, 2266 events. 1192/2266 cut-off events. For 122228/122234 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 11922 event pairs, 38 based on Foata normal form. 132/2397 useless extension candidates. Maximal degree in co-relation 16398. Up to 477 conditions per place. [2023-11-29 02:58:53,720 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 89 selfloop transitions, 76 changer transitions 93/261 dead transitions. [2023-11-29 02:58:53,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 261 transitions, 4778 flow [2023-11-29 02:58:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 02:58:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 02:58:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 345 transitions. [2023-11-29 02:58:53,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133928571428571 [2023-11-29 02:58:53,723 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 345 transitions. [2023-11-29 02:58:53,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 345 transitions. [2023-11-29 02:58:53,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:58:53,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 345 transitions. [2023-11-29 02:58:53,726 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) [2023-11-29 02:58:53,728 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) [2023-11-29 02:58:53,729 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) [2023-11-29 02:58:53,729 INFO L175 Difference]: Start difference. First operand has 133 places, 81 transitions, 1268 flow. Second operand 28 states and 345 transitions. [2023-11-29 02:58:53,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 261 transitions, 4778 flow [2023-11-29 02:58:53,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 261 transitions, 4045 flow, removed 330 selfloop flow, removed 18 redundant places. [2023-11-29 02:58:53,846 INFO L231 Difference]: Finished difference. Result has 152 places, 100 transitions, 1817 flow [2023-11-29 02:58:53,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1817, PETRI_PLACES=152, PETRI_TRANSITIONS=100} [2023-11-29 02:58:53,847 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 126 predicate places. [2023-11-29 02:58:53,847 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 100 transitions, 1817 flow [2023-11-29 02:58:53,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.0625) internal successors, (113), 16 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:58:53,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:58:53,848 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:58:53,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:58:54,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:58:54,051 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:58:54,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:58:54,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1698029678, now seen corresponding path program 3 times [2023-11-29 02:58:54,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:58:54,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048452353] [2023-11-29 02:58:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:54,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:58:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:58:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:54,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:58:54,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048452353] [2023-11-29 02:58:54,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048452353] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:58:54,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497535605] [2023-11-29 02:58:54,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:58:54,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:58:54,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:58:54,266 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:58:54,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:58:54,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 02:58:54,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:58:54,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:58:54,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:58:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:54,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:58:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:54,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497535605] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:58:54,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:58:54,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-11-29 02:58:54,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792771566] [2023-11-29 02:58:54,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:58:54,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:58:54,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:58:54,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:58:54,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:58:54,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-29 02:58:54,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 100 transitions, 1817 flow. Second operand has 24 states, 24 states have (on average 7.041666666666667) internal successors, (169), 24 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:58:54,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:58:54,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-29 02:58:54,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:58:56,156 INFO L124 PetriNetUnfolderBase]: 1678/3091 cut-off events. [2023-11-29 02:58:56,156 INFO L125 PetriNetUnfolderBase]: For 227545/227551 co-relation queries the response was YES. [2023-11-29 02:58:56,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25882 conditions, 3091 events. 1678/3091 cut-off events. For 227545/227551 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 15407 event pairs, 40 based on Foata normal form. 96/3186 useless extension candidates. Maximal degree in co-relation 25811. Up to 663 conditions per place. [2023-11-29 02:58:56,190 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 142 selfloop transitions, 110 changer transitions 135/390 dead transitions. [2023-11-29 02:58:56,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 390 transitions, 7983 flow [2023-11-29 02:58:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 02:58:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 02:58:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 565 transitions. [2023-11-29 02:58:56,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117753623188406 [2023-11-29 02:58:56,194 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 565 transitions. [2023-11-29 02:58:56,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 565 transitions. [2023-11-29 02:58:56,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:58:56,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 565 transitions. [2023-11-29 02:58:56,198 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) [2023-11-29 02:58:56,201 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) [2023-11-29 02:58:56,202 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) [2023-11-29 02:58:56,202 INFO L175 Difference]: Start difference. First operand has 152 places, 100 transitions, 1817 flow. Second operand 46 states and 565 transitions. [2023-11-29 02:58:56,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 390 transitions, 7983 flow [2023-11-29 02:58:56,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 390 transitions, 6809 flow, removed 557 selfloop flow, removed 19 redundant places. [2023-11-29 02:58:56,424 INFO L231 Difference]: Finished difference. Result has 199 places, 134 transitions, 2925 flow [2023-11-29 02:58:56,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1371, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2925, PETRI_PLACES=199, PETRI_TRANSITIONS=134} [2023-11-29 02:58:56,425 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 173 predicate places. [2023-11-29 02:58:56,425 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 134 transitions, 2925 flow [2023-11-29 02:58:56,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.041666666666667) internal successors, (169), 24 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:58:56,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:58:56,426 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:58:56,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 02:58:56,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 02:58:56,631 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:58:56,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:58:56,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1880589793, now seen corresponding path program 4 times [2023-11-29 02:58:56,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:58:56,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932149751] [2023-11-29 02:58:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:56,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:58:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:58:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:56,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:58:56,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932149751] [2023-11-29 02:58:56,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932149751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:58:56,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252505458] [2023-11-29 02:58:56,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:58:56,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:58:56,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:58:56,965 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:58:56,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:58:57,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:58:57,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:58:57,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:58:57,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:58:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:57,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:58:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:58:57,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252505458] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:58:57,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:58:57,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2023-11-29 02:58:57,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501127042] [2023-11-29 02:58:57,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:58:57,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 02:58:57,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:58:57,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 02:58:57,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:58:57,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-29 02:58:57,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 134 transitions, 2925 flow. Second operand has 35 states, 35 states have (on average 7.057142857142857) internal successors, (247), 35 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:58:57,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:58:57,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-29 02:58:57,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:58:59,341 INFO L124 PetriNetUnfolderBase]: 1912/3702 cut-off events. [2023-11-29 02:58:59,341 INFO L125 PetriNetUnfolderBase]: For 430433/430439 co-relation queries the response was YES. [2023-11-29 02:58:59,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35082 conditions, 3702 events. 1912/3702 cut-off events. For 430433/430439 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 19844 event pairs, 405 based on Foata normal form. 69/3768 useless extension candidates. Maximal degree in co-relation 34993. Up to 1447 conditions per place. [2023-11-29 02:58:59,373 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 188 selfloop transitions, 89 changer transitions 119/399 dead transitions. [2023-11-29 02:58:59,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 399 transitions, 10034 flow [2023-11-29 02:58:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 02:58:59,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-29 02:58:59,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 523 transitions. [2023-11-29 02:58:59,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4842592592592593 [2023-11-29 02:58:59,375 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 523 transitions. [2023-11-29 02:58:59,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 523 transitions. [2023-11-29 02:58:59,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:58:59,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 523 transitions. [2023-11-29 02:58:59,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 11.622222222222222) internal successors, (523), 45 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:58:59,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 24.0) internal successors, (1104), 46 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:58:59,381 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 24.0) internal successors, (1104), 46 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:58:59,381 INFO L175 Difference]: Start difference. First operand has 199 places, 134 transitions, 2925 flow. Second operand 45 states and 523 transitions. [2023-11-29 02:58:59,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 399 transitions, 10034 flow [2023-11-29 02:58:59,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 399 transitions, 7137 flow, removed 1408 selfloop flow, removed 29 redundant places. [2023-11-29 02:58:59,875 INFO L231 Difference]: Finished difference. Result has 219 places, 166 transitions, 3087 flow [2023-11-29 02:58:59,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=3087, PETRI_PLACES=219, PETRI_TRANSITIONS=166} [2023-11-29 02:58:59,876 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 193 predicate places. [2023-11-29 02:58:59,876 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 166 transitions, 3087 flow [2023-11-29 02:58:59,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 7.057142857142857) internal successors, (247), 35 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:58:59,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:58:59,877 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:58:59,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:59:00,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:59:00,078 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:59:00,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:59:00,078 INFO L85 PathProgramCache]: Analyzing trace with hash 2063055239, now seen corresponding path program 5 times [2023-11-29 02:59:00,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:59:00,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114529590] [2023-11-29 02:59:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:59:00,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:59:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:59:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:59:00,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:59:00,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114529590] [2023-11-29 02:59:00,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114529590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:59:00,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043492801] [2023-11-29 02:59:00,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:59:00,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:59:00,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:59:00,421 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:59:00,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:59:00,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-29 02:59:00,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:59:00,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:59:00,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:59:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:59:00,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:59:01,062 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:59:01,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043492801] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:59:01,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:59:01,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2023-11-29 02:59:01,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181297401] [2023-11-29 02:59:01,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:59:01,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 02:59:01,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:59:01,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 02:59:01,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 02:59:01,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-29 02:59:01,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 166 transitions, 3087 flow. Second operand has 36 states, 36 states have (on average 7.083333333333333) internal successors, (255), 36 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:01,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:59:01,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-29 02:59:01,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:59:03,492 INFO L124 PetriNetUnfolderBase]: 2407/4793 cut-off events. [2023-11-29 02:59:03,492 INFO L125 PetriNetUnfolderBase]: For 454011/454017 co-relation queries the response was YES. [2023-11-29 02:59:03,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40760 conditions, 4793 events. 2407/4793 cut-off events. For 454011/454017 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 27652 event pairs, 170 based on Foata normal form. 87/4879 useless extension candidates. Maximal degree in co-relation 40674. Up to 1131 conditions per place. [2023-11-29 02:59:03,531 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 180 selfloop transitions, 169 changer transitions 145/497 dead transitions. [2023-11-29 02:59:03,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 497 transitions, 10744 flow [2023-11-29 02:59:03,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-29 02:59:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-11-29 02:59:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 626 transitions. [2023-11-29 02:59:03,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4921383647798742 [2023-11-29 02:59:03,534 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 626 transitions. [2023-11-29 02:59:03,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 626 transitions. [2023-11-29 02:59:03,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:59:03,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 626 transitions. [2023-11-29 02:59:03,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 11.81132075471698) internal successors, (626), 53 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:03,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 24.0) internal successors, (1296), 54 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:03,540 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 24.0) internal successors, (1296), 54 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:03,540 INFO L175 Difference]: Start difference. First operand has 219 places, 166 transitions, 3087 flow. Second operand 53 states and 626 transitions. [2023-11-29 02:59:03,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 497 transitions, 10744 flow [2023-11-29 02:59:04,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 497 transitions, 9714 flow, removed 456 selfloop flow, removed 26 redundant places. [2023-11-29 02:59:04,320 INFO L231 Difference]: Finished difference. Result has 258 places, 217 transitions, 4596 flow [2023-11-29 02:59:04,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2629, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=4596, PETRI_PLACES=258, PETRI_TRANSITIONS=217} [2023-11-29 02:59:04,321 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 232 predicate places. [2023-11-29 02:59:04,321 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 217 transitions, 4596 flow [2023-11-29 02:59:04,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 7.083333333333333) internal successors, (255), 36 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:04,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:59:04,322 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:59:04,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:59:04,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:59:04,523 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:59:04,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:59:04,523 INFO L85 PathProgramCache]: Analyzing trace with hash 180767403, now seen corresponding path program 6 times [2023-11-29 02:59:04,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:59:04,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709744105] [2023-11-29 02:59:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:59:04,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:59:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:59:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:59:04,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:59:04,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709744105] [2023-11-29 02:59:04,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709744105] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:59:04,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699931057] [2023-11-29 02:59:04,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:59:04,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:59:04,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:59:04,892 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:59:04,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:59:04,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-29 02:59:04,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:59:04,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:59:04,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:59:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:59:05,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:59:05,377 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:59:05,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699931057] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:59:05,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:59:05,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2023-11-29 02:59:05,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729762921] [2023-11-29 02:59:05,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:59:05,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 02:59:05,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:59:05,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 02:59:05,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:59:05,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-29 02:59:05,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 217 transitions, 4596 flow. Second operand has 35 states, 35 states have (on average 7.057142857142857) internal successors, (247), 35 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:05,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:59:05,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-29 02:59:05,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:59:08,177 INFO L124 PetriNetUnfolderBase]: 3028/6007 cut-off events. [2023-11-29 02:59:08,177 INFO L125 PetriNetUnfolderBase]: For 796812/796818 co-relation queries the response was YES. [2023-11-29 02:59:08,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58310 conditions, 6007 events. 3028/6007 cut-off events. For 796812/796818 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 36078 event pairs, 83 based on Foata normal form. 87/6091 useless extension candidates. Maximal degree in co-relation 58212. Up to 1440 conditions per place. [2023-11-29 02:59:08,230 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 193 selfloop transitions, 219 changer transitions 125/540 dead transitions. [2023-11-29 02:59:08,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 540 transitions, 13174 flow [2023-11-29 02:59:08,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 02:59:08,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-29 02:59:08,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 620 transitions. [2023-11-29 02:59:08,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065359477124183 [2023-11-29 02:59:08,232 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 620 transitions. [2023-11-29 02:59:08,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 620 transitions. [2023-11-29 02:59:08,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:59:08,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 620 transitions. [2023-11-29 02:59:08,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 12.156862745098039) internal successors, (620), 51 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:08,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 24.0) internal successors, (1248), 52 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:08,237 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 24.0) internal successors, (1248), 52 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:08,237 INFO L175 Difference]: Start difference. First operand has 258 places, 217 transitions, 4596 flow. Second operand 51 states and 620 transitions. [2023-11-29 02:59:08,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 540 transitions, 13174 flow [2023-11-29 02:59:09,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 540 transitions, 11573 flow, removed 719 selfloop flow, removed 27 redundant places. [2023-11-29 02:59:09,506 INFO L231 Difference]: Finished difference. Result has 295 places, 256 transitions, 5725 flow [2023-11-29 02:59:09,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3701, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=5725, PETRI_PLACES=295, PETRI_TRANSITIONS=256} [2023-11-29 02:59:09,507 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 269 predicate places. [2023-11-29 02:59:09,507 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 256 transitions, 5725 flow [2023-11-29 02:59:09,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 7.057142857142857) internal successors, (247), 35 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:09,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:59:09,508 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:59:09,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:59:09,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 02:59:09,708 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:59:09,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:59:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1985022859, now seen corresponding path program 7 times [2023-11-29 02:59:09,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:59:09,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794310950] [2023-11-29 02:59:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:59:09,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:59:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:59:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:59:09,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:59:09,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794310950] [2023-11-29 02:59:09,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794310950] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:59:09,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539030726] [2023-11-29 02:59:09,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:59:09,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:59:09,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:59:09,969 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:59:09,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:59:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:59:10,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:59:10,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:59:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:59:10,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:59:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:59:10,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539030726] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:59:10,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:59:10,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2023-11-29 02:59:10,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963576248] [2023-11-29 02:59:10,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:59:10,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 02:59:10,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:59:10,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 02:59:10,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 02:59:10,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-29 02:59:10,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 256 transitions, 5725 flow. Second operand has 36 states, 36 states have (on average 7.027777777777778) internal successors, (253), 36 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:10,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:59:10,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-29 02:59:10,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:59:13,316 INFO L124 PetriNetUnfolderBase]: 3037/6040 cut-off events. [2023-11-29 02:59:13,316 INFO L125 PetriNetUnfolderBase]: For 982574/982580 co-relation queries the response was YES. [2023-11-29 02:59:13,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62130 conditions, 6040 events. 3037/6040 cut-off events. For 982574/982580 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 36447 event pairs, 38 based on Foata normal form. 123/6162 useless extension candidates. Maximal degree in co-relation 62017. Up to 1431 conditions per place. [2023-11-29 02:59:13,373 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 163 selfloop transitions, 241 changer transitions 131/538 dead transitions. [2023-11-29 02:59:13,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 538 transitions, 14123 flow [2023-11-29 02:59:13,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 02:59:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-29 02:59:13,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 585 transitions. [2023-11-29 02:59:13,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2023-11-29 02:59:13,375 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 585 transitions. [2023-11-29 02:59:13,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 585 transitions. [2023-11-29 02:59:13,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:59:13,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 585 transitions. [2023-11-29 02:59:13,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 12.1875) internal successors, (585), 48 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:13,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 24.0) internal successors, (1176), 49 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:13,379 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 24.0) internal successors, (1176), 49 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:13,379 INFO L175 Difference]: Start difference. First operand has 295 places, 256 transitions, 5725 flow. Second operand 48 states and 585 transitions. [2023-11-29 02:59:13,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 538 transitions, 14123 flow [2023-11-29 02:59:15,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 538 transitions, 12067 flow, removed 926 selfloop flow, removed 29 redundant places. [2023-11-29 02:59:15,870 INFO L231 Difference]: Finished difference. Result has 321 places, 269 transitions, 6212 flow [2023-11-29 02:59:15,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4701, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=6212, PETRI_PLACES=321, PETRI_TRANSITIONS=269} [2023-11-29 02:59:15,871 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 295 predicate places. [2023-11-29 02:59:15,871 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 269 transitions, 6212 flow [2023-11-29 02:59:15,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 7.027777777777778) internal successors, (253), 36 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:15,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:59:15,872 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:59:15,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 02:59:16,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:59:16,072 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:59:16,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:59:16,073 INFO L85 PathProgramCache]: Analyzing trace with hash 719759497, now seen corresponding path program 8 times [2023-11-29 02:59:16,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:59:16,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576009476] [2023-11-29 02:59:16,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:59:16,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:59:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:59:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:59:16,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:59:16,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576009476] [2023-11-29 02:59:16,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576009476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:59:16,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121184800] [2023-11-29 02:59:16,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:59:16,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:59:16,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:59:16,465 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:59:16,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:59:16,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:59:16,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:59:16,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 02:59:16,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:59:16,648 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:59:16,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:59:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:59:16,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121184800] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:59:16,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:59:16,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 29 [2023-11-29 02:59:16,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279819538] [2023-11-29 02:59:16,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:59:16,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 02:59:16,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:59:16,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 02:59:16,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2023-11-29 02:59:16,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-29 02:59:16,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 269 transitions, 6212 flow. Second operand has 30 states, 30 states have (on average 7.133333333333334) internal successors, (214), 30 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:16,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:59:16,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-29 02:59:16,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:59:19,997 INFO L124 PetriNetUnfolderBase]: 3298/6495 cut-off events. [2023-11-29 02:59:19,997 INFO L125 PetriNetUnfolderBase]: For 1126959/1126965 co-relation queries the response was YES. [2023-11-29 02:59:20,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68548 conditions, 6495 events. 3298/6495 cut-off events. For 1126959/1126965 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 38642 event pairs, 42 based on Foata normal form. 60/6554 useless extension candidates. Maximal degree in co-relation 68428. Up to 1515 conditions per place. [2023-11-29 02:59:20,079 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 192 selfloop transitions, 266 changer transitions 131/592 dead transitions. [2023-11-29 02:59:20,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 592 transitions, 15528 flow [2023-11-29 02:59:20,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-29 02:59:20,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-11-29 02:59:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 657 transitions. [2023-11-29 02:59:20,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2023-11-29 02:59:20,082 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 657 transitions. [2023-11-29 02:59:20,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 657 transitions. [2023-11-29 02:59:20,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:59:20,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 657 transitions. [2023-11-29 02:59:20,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 12.166666666666666) internal successors, (657), 54 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:20,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 24.0) internal successors, (1320), 55 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:20,088 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 24.0) internal successors, (1320), 55 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:20,089 INFO L175 Difference]: Start difference. First operand has 321 places, 269 transitions, 6212 flow. Second operand 54 states and 657 transitions. [2023-11-29 02:59:20,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 592 transitions, 15528 flow [2023-11-29 02:59:22,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 592 transitions, 13839 flow, removed 659 selfloop flow, removed 40 redundant places. [2023-11-29 02:59:22,815 INFO L231 Difference]: Finished difference. Result has 343 places, 294 transitions, 7045 flow [2023-11-29 02:59:22,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=5113, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=7045, PETRI_PLACES=343, PETRI_TRANSITIONS=294} [2023-11-29 02:59:22,816 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 317 predicate places. [2023-11-29 02:59:22,816 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 294 transitions, 7045 flow [2023-11-29 02:59:22,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.133333333333334) internal successors, (214), 30 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:59:22,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:59:22,817 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:59:22,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:59:23,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:59:23,017 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 02:59:23,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:59:23,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1762911540, now seen corresponding path program 9 times [2023-11-29 02:59:23,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:59:23,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844701924] [2023-11-29 02:59:23,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:59:23,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:59:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:59:23,037 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 02:59:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:59:23,079 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 02:59:23,079 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 02:59:23,080 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-29 02:59:23,082 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-29 02:59:23,082 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-29 02:59:23,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 02:59:23,082 INFO L445 BasicCegarLoop]: Path program histogram: [9, 2, 2, 2, 1] [2023-11-29 02:59:23,087 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-29 02:59:23,087 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 02:59:23,138 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre5 could not be translated [2023-11-29 02:59:23,140 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre7 could not be translated [2023-11-29 02:59:23,165 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 02:59:23 BasicIcfg [2023-11-29 02:59:23,165 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 02:59:23,166 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 02:59:23,166 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 02:59:23,166 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 02:59:23,166 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:58:45" (3/4) ... [2023-11-29 02:59:23,167 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-29 02:59:23,190 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre5 could not be translated [2023-11-29 02:59:23,191 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre7 could not be translated [2023-11-29 02:59:23,242 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 02:59:23,242 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 02:59:23,243 INFO L158 Benchmark]: Toolchain (without parser) took 38757.00ms. Allocated memory was 134.2MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 99.8MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 948.2MB. Max. memory is 16.1GB. [2023-11-29 02:59:23,243 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 134.2MB. Free memory is still 106.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 02:59:23,273 INFO L158 Benchmark]: CACSL2BoogieTranslator took 457.32ms. Allocated memory is still 134.2MB. Free memory was 99.8MB in the beginning and 80.0MB in the end (delta: 19.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-29 02:59:23,273 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.88ms. Allocated memory is still 134.2MB. Free memory was 80.0MB in the beginning and 78.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 02:59:23,274 INFO L158 Benchmark]: Boogie Preprocessor took 44.51ms. Allocated memory is still 134.2MB. Free memory was 78.3MB in the beginning and 75.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 02:59:23,274 INFO L158 Benchmark]: RCFGBuilder took 404.07ms. Allocated memory is still 134.2MB. Free memory was 75.9MB in the beginning and 55.7MB in the end (delta: 20.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-11-29 02:59:23,274 INFO L158 Benchmark]: TraceAbstraction took 37724.04ms. Allocated memory was 134.2MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 55.3MB in the beginning and 1.5GB in the end (delta: -1.5GB). Peak memory consumption was 891.6MB. Max. memory is 16.1GB. [2023-11-29 02:59:23,275 INFO L158 Benchmark]: Witness Printer took 76.69ms. Allocated memory is still 2.5GB. Free memory was 1.5GB in the beginning and 1.5GB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-29 02:59:23,277 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 134.2MB. Free memory is still 106.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 457.32ms. Allocated memory is still 134.2MB. Free memory was 99.8MB in the beginning and 80.0MB in the end (delta: 19.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.88ms. Allocated memory is still 134.2MB. Free memory was 80.0MB in the beginning and 78.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.51ms. Allocated memory is still 134.2MB. Free memory was 78.3MB in the beginning and 75.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 404.07ms. Allocated memory is still 134.2MB. Free memory was 75.9MB in the beginning and 55.7MB in the end (delta: 20.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 37724.04ms. Allocated memory was 134.2MB in the beginning and 2.5GB in the end (delta: 2.4GB). Free memory was 55.3MB in the beginning and 1.5GB in the end (delta: -1.5GB). Peak memory consumption was 891.6MB. Max. memory is 16.1GB. * Witness Printer took 76.69ms. Allocated memory is still 2.5GB. Free memory was 1.5GB in the beginning and 1.5GB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre7 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre7 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, argc=51, argv={49:50}, i=3, id1={5:0}, id2={3:0}, j=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, i=3, id1={5:0}, id2={3:0}, j=6, k=0] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L716] 0 int condI = i >= (2*10 +6); VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, condI=0, i=7, id1={5:0}, id2={3:0}, j=6, k=0, k=1] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=7] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L719] 0 int condJ = j >= (2*10 +6); VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, condI=0, condJ=1, i=25, id1={5:0}, id2={3:0}, j=26, k=9, k=9] [L721] COND TRUE 0 condI || condJ VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, condI=0, condJ=1, i=25, id1={5:0}, id2={3:0}, j=26, k=9, k=9] [L722] 0 reach_error() VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, condI=0, condJ=1, i=25, id1={5:0}, id2={3:0}, j=26, k=9, k=9] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 37.5s, OverallIterations: 16, TraceHistogramMax: 10, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 27.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5723 SdHoareTripleChecker+Valid, 4.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5704 mSDsluCounter, 280 SdHoareTripleChecker+Invalid, 3.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 273 mSDsCounter, 346 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6814 IncrementalHoareTripleChecker+Invalid, 7160 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 346 mSolverCounterUnsat, 7 mSDtfsCounter, 6814 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1262 GetRequests, 630 SyntacticMatches, 14 SemanticMatches, 618 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11064 ImplicationChecksByTransitivity, 6.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7045occurred in iteration=15, InterpolantAutomatonStates: 443, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 888 NumberOfCodeBlocks, 888 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 1162 ConstructedInterpolants, 0 QuantifiedInterpolants, 4957 SizeOfPredicates, 106 NumberOfNonLiveVariables, 1480 ConjunctsInSsa, 158 ConjunctsInUnsatCore, 35 InterpolantComputations, 5 PerfectInterpolantSequences, 0/2094 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-29 02:59:23,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78a7f4ee-94ea-4f9f-832c-6a0a58669dab/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE