./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/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_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/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_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/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 6aeaf730cbe4eb831d189bfd9925d1660c7714b9e685f389bc2495c0943d6472 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:52:14,023 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:52:14,082 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 23:52:14,086 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:52:14,087 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:52:14,108 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:52:14,108 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:52:14,109 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:52:14,109 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:52:14,110 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:52:14,110 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:52:14,111 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:52:14,112 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:52:14,112 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:52:14,113 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:52:14,113 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:52:14,114 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 23:52:14,114 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:52:14,115 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:52:14,115 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:52:14,116 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:52:14,116 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 23:52:14,117 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:52:14,117 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 23:52:14,118 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:52:14,118 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 23:52:14,118 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:52:14,119 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:52:14,119 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:52:14,120 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:52:14,120 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:52:14,120 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:52:14,121 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:52:14,121 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:52:14,121 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 23:52:14,121 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:52:14,121 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:52:14,122 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:52:14,122 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:52:14,122 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 23:52:14,122 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:52:14,122 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:52:14,123 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_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6aeaf730cbe4eb831d189bfd9925d1660c7714b9e685f389bc2495c0943d6472 [2023-11-28 23:52:14,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:52:14,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:52:14,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:52:14,364 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:52:14,364 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:52:14,365 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i [2023-11-28 23:52:17,116 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:52:17,332 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:52:17,333 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i [2023-11-28 23:52:17,349 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/data/970b5745e/b4079f9a7f204178bf2c84819731ce42/FLAGe9aded147 [2023-11-28 23:52:17,360 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/data/970b5745e/b4079f9a7f204178bf2c84819731ce42 [2023-11-28 23:52:17,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:52:17,364 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:52:17,365 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:52:17,366 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:52:17,371 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:52:17,371 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:52:17" (1/1) ... [2023-11-28 23:52:17,372 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17f9f481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:52:17, skipping insertion in model container [2023-11-28 23:52:17,373 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:52:17" (1/1) ... [2023-11-28 23:52:17,424 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:52:17,560 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_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i[1115,1128] [2023-11-28 23:52:17,710 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:52:17,722 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:52:17,731 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_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i[1115,1128] [2023-11-28 23:52:17,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:52:17,794 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:52:17,795 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:52:17 WrapperNode [2023-11-28 23:52:17,795 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:52:17,796 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:52:17,796 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:52:17,796 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:52:17,802 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:52:17" (1/1) ... [2023-11-28 23:52:17,815 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:52:17" (1/1) ... [2023-11-28 23:52:17,839 INFO L138 Inliner]: procedures = 166, calls = 38, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 125 [2023-11-28 23:52:17,839 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:52:17,840 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:52:17,840 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:52:17,840 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:52:17,849 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:52:17" (1/1) ... [2023-11-28 23:52:17,850 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:52:17" (1/1) ... [2023-11-28 23:52:17,853 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:52:17" (1/1) ... [2023-11-28 23:52:17,869 INFO L175 MemorySlicer]: Split 19 memory accesses to 3 slices as follows [2, 1, 16]. 84 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 0, 6]. The 4 writes are split as follows [0, 1, 3]. [2023-11-28 23:52:17,869 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:52:17" (1/1) ... [2023-11-28 23:52:17,869 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:52:17" (1/1) ... [2023-11-28 23:52:17,877 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:52:17" (1/1) ... [2023-11-28 23:52:17,881 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:52:17" (1/1) ... [2023-11-28 23:52:17,883 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:52:17" (1/1) ... [2023-11-28 23:52:17,885 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:52:17" (1/1) ... [2023-11-28 23:52:17,889 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:52:17,890 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:52:17,890 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:52:17,890 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:52:17,891 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:52:17" (1/1) ... [2023-11-28 23:52:17,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:52:17,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:52:17,917 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:52:17,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:52:17,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 23:52:17,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 23:52:17,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 23:52:17,954 INFO L130 BoogieDeclarations]: Found specification of procedure worker [2023-11-28 23:52:17,954 INFO L138 BoogieDeclarations]: Found implementation of procedure worker [2023-11-28 23:52:17,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 23:52:17,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 23:52:17,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 23:52:17,955 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-28 23:52:17,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:52:17,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 23:52:17,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 23:52:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 23:52:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 23:52:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 23:52:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-28 23:52:17,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:52:17,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:52:17,958 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 23:52:18,087 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:52:18,089 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:52:18,287 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:52:18,481 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:52:18,481 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-28 23:52:18,482 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:52:18 BoogieIcfgContainer [2023-11-28 23:52:18,482 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:52:18,484 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:52:18,485 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:52:18,487 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:52:18,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:52:17" (1/3) ... [2023-11-28 23:52:18,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43af352e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:52:18, skipping insertion in model container [2023-11-28 23:52:18,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:52:17" (2/3) ... [2023-11-28 23:52:18,489 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43af352e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:52:18, skipping insertion in model container [2023-11-28 23:52:18,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:52:18" (3/3) ... [2023-11-28 23:52:18,490 INFO L112 eAbstractionObserver]: Analyzing ICFG 13-privatized_68-pfscan_protected_loop_minimal_interval_true.i [2023-11-28 23:52:18,497 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-28 23:52:18,505 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:52:18,505 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-28 23:52:18,506 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 23:52:18,546 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:52:18,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 37 transitions, 78 flow [2023-11-28 23:52:18,605 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2023-11-28 23:52:18,605 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:52:18,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 36 events. 7/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 48 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 34. Up to 2 conditions per place. [2023-11-28 23:52:18,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 37 transitions, 78 flow [2023-11-28 23:52:18,612 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 36 transitions, 75 flow [2023-11-28 23:52:18,623 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:52:18,629 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;@3b59c6d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:52:18,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-28 23:52:18,641 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:52:18,641 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2023-11-28 23:52:18,641 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:52:18,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:18,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:18,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:52:18,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:18,649 INFO L85 PathProgramCache]: Analyzing trace with hash -340334647, now seen corresponding path program 1 times [2023-11-28 23:52:18,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:18,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791616569] [2023-11-28 23:52:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:18,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:18,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:19,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:19,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791616569] [2023-11-28 23:52:19,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791616569] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:52:19,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:52:19,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:52:19,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401685791] [2023-11-28 23:52:19,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:52:19,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:52:19,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:19,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:52:19,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:52:19,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2023-11-28 23:52:19,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 36 transitions, 75 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:19,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:19,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2023-11-28 23:52:19,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:52:19,437 INFO L124 PetriNetUnfolderBase]: 218/450 cut-off events. [2023-11-28 23:52:19,437 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:52:19,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 860 conditions, 450 events. 218/450 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1933 event pairs, 20 based on Foata normal form. 37/406 useless extension candidates. Maximal degree in co-relation 851. Up to 241 conditions per place. [2023-11-28 23:52:19,445 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 47 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2023-11-28 23:52:19,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 69 transitions, 265 flow [2023-11-28 23:52:19,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 23:52:19,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 23:52:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2023-11-28 23:52:19,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.536036036036036 [2023-11-28 23:52:19,461 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 119 transitions. [2023-11-28 23:52:19,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 119 transitions. [2023-11-28 23:52:19,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:52:19,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 119 transitions. [2023-11-28 23:52:19,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:19,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:19,472 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:19,474 INFO L175 Difference]: Start difference. First operand has 33 places, 36 transitions, 75 flow. Second operand 6 states and 119 transitions. [2023-11-28 23:52:19,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 69 transitions, 265 flow [2023-11-28 23:52:19,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 69 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:52:19,481 INFO L231 Difference]: Finished difference. Result has 41 places, 44 transitions, 168 flow [2023-11-28 23:52:19,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=168, PETRI_PLACES=41, PETRI_TRANSITIONS=44} [2023-11-28 23:52:19,487 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2023-11-28 23:52:19,488 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 44 transitions, 168 flow [2023-11-28 23:52:19,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:19,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:19,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:19,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 23:52:19,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting workerErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:52:19,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:19,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1960469910, now seen corresponding path program 1 times [2023-11-28 23:52:19,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:19,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665003989] [2023-11-28 23:52:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:19,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:19,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:19,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665003989] [2023-11-28 23:52:19,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665003989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:52:19,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:52:19,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:52:19,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897217608] [2023-11-28 23:52:19,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:52:19,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:52:19,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:19,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:52:19,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:52:19,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-28 23:52:19,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:19,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:19,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-28 23:52:19,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:52:19,849 INFO L124 PetriNetUnfolderBase]: 278/559 cut-off events. [2023-11-28 23:52:19,849 INFO L125 PetriNetUnfolderBase]: For 184/186 co-relation queries the response was YES. [2023-11-28 23:52:19,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1397 conditions, 559 events. 278/559 cut-off events. For 184/186 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2458 event pairs, 60 based on Foata normal form. 20/538 useless extension candidates. Maximal degree in co-relation 1382. Up to 303 conditions per place. [2023-11-28 23:52:19,857 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 58 selfloop transitions, 25 changer transitions 0/89 dead transitions. [2023-11-28 23:52:19,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 89 transitions, 474 flow [2023-11-28 23:52:19,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 23:52:19,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 23:52:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2023-11-28 23:52:19,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2023-11-28 23:52:19,860 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 108 transitions. [2023-11-28 23:52:19,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 108 transitions. [2023-11-28 23:52:19,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:52:19,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 108 transitions. [2023-11-28 23:52:19,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:19,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:19,864 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:19,864 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 168 flow. Second operand 6 states and 108 transitions. [2023-11-28 23:52:19,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 89 transitions, 474 flow [2023-11-28 23:52:19,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 89 transitions, 474 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-28 23:52:19,872 INFO L231 Difference]: Finished difference. Result has 51 places, 60 transitions, 366 flow [2023-11-28 23:52:19,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=51, PETRI_TRANSITIONS=60} [2023-11-28 23:52:19,873 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 18 predicate places. [2023-11-28 23:52:19,873 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 60 transitions, 366 flow [2023-11-28 23:52:19,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:19,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:19,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:19,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 23:52:19,874 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:52:19,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:19,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1896296725, now seen corresponding path program 1 times [2023-11-28 23:52:19,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:19,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724458192] [2023-11-28 23:52:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:19,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:20,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:20,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724458192] [2023-11-28 23:52:20,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724458192] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:52:20,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:52:20,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 23:52:20,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824438994] [2023-11-28 23:52:20,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:52:20,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 23:52:20,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:20,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 23:52:20,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:52:20,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2023-11-28 23:52:20,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 60 transitions, 366 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:20,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:20,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2023-11-28 23:52:20,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:52:20,521 INFO L124 PetriNetUnfolderBase]: 399/859 cut-off events. [2023-11-28 23:52:20,521 INFO L125 PetriNetUnfolderBase]: For 1245/1262 co-relation queries the response was YES. [2023-11-28 23:52:20,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2742 conditions, 859 events. 399/859 cut-off events. For 1245/1262 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4767 event pairs, 86 based on Foata normal form. 16/819 useless extension candidates. Maximal degree in co-relation 2722. Up to 360 conditions per place. [2023-11-28 23:52:20,553 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 87 selfloop transitions, 27 changer transitions 0/127 dead transitions. [2023-11-28 23:52:20,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 127 transitions, 942 flow [2023-11-28 23:52:20,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 23:52:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-28 23:52:20,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2023-11-28 23:52:20,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138996138996139 [2023-11-28 23:52:20,556 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 159 transitions. [2023-11-28 23:52:20,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 159 transitions. [2023-11-28 23:52:20,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:52:20,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 159 transitions. [2023-11-28 23:52:20,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:20,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:20,560 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:20,560 INFO L175 Difference]: Start difference. First operand has 51 places, 60 transitions, 366 flow. Second operand 7 states and 159 transitions. [2023-11-28 23:52:20,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 127 transitions, 942 flow [2023-11-28 23:52:20,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 127 transitions, 942 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-28 23:52:20,572 INFO L231 Difference]: Finished difference. Result has 60 places, 76 transitions, 588 flow [2023-11-28 23:52:20,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=60, PETRI_TRANSITIONS=76} [2023-11-28 23:52:20,573 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 27 predicate places. [2023-11-28 23:52:20,573 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 76 transitions, 588 flow [2023-11-28 23:52:20,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:20,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:20,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:20,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 23:52:20,574 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:52:20,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:20,575 INFO L85 PathProgramCache]: Analyzing trace with hash 44192555, now seen corresponding path program 2 times [2023-11-28 23:52:20,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:20,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003379862] [2023-11-28 23:52:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:20,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:21,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:21,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003379862] [2023-11-28 23:52:21,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003379862] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:52:21,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:52:21,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 23:52:21,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858204460] [2023-11-28 23:52:21,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:52:21,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 23:52:21,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:21,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 23:52:21,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:52:21,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2023-11-28 23:52:21,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 76 transitions, 588 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:21,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:21,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2023-11-28 23:52:21,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:52:21,588 INFO L124 PetriNetUnfolderBase]: 468/945 cut-off events. [2023-11-28 23:52:21,588 INFO L125 PetriNetUnfolderBase]: For 1990/2021 co-relation queries the response was YES. [2023-11-28 23:52:21,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3468 conditions, 945 events. 468/945 cut-off events. For 1990/2021 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4973 event pairs, 104 based on Foata normal form. 32/971 useless extension candidates. Maximal degree in co-relation 3443. Up to 583 conditions per place. [2023-11-28 23:52:21,600 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 67 selfloop transitions, 61 changer transitions 0/136 dead transitions. [2023-11-28 23:52:21,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 136 transitions, 1241 flow [2023-11-28 23:52:21,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 23:52:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-28 23:52:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 196 transitions. [2023-11-28 23:52:21,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074844074844075 [2023-11-28 23:52:21,603 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 196 transitions. [2023-11-28 23:52:21,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 196 transitions. [2023-11-28 23:52:21,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:52:21,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 196 transitions. [2023-11-28 23:52:21,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 15.076923076923077) internal successors, (196), 13 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:21,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 37.0) internal successors, (518), 14 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:21,608 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 37.0) internal successors, (518), 14 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:21,608 INFO L175 Difference]: Start difference. First operand has 60 places, 76 transitions, 588 flow. Second operand 13 states and 196 transitions. [2023-11-28 23:52:21,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 136 transitions, 1241 flow [2023-11-28 23:52:21,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 136 transitions, 1205 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 23:52:21,626 INFO L231 Difference]: Finished difference. Result has 73 places, 108 transitions, 999 flow [2023-11-28 23:52:21,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=999, PETRI_PLACES=73, PETRI_TRANSITIONS=108} [2023-11-28 23:52:21,627 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 40 predicate places. [2023-11-28 23:52:21,628 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 108 transitions, 999 flow [2023-11-28 23:52:21,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:21,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:21,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:21,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 23:52:21,629 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:52:21,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:21,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1880162957, now seen corresponding path program 3 times [2023-11-28 23:52:21,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:21,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219402503] [2023-11-28 23:52:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:21,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:21,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:21,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219402503] [2023-11-28 23:52:21,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219402503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:52:21,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:52:21,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 23:52:21,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040191249] [2023-11-28 23:52:21,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:52:21,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 23:52:21,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:21,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 23:52:21,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:52:21,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2023-11-28 23:52:21,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 108 transitions, 999 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:21,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:21,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2023-11-28 23:52:21,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:52:22,248 INFO L124 PetriNetUnfolderBase]: 662/1433 cut-off events. [2023-11-28 23:52:22,249 INFO L125 PetriNetUnfolderBase]: For 3699/3724 co-relation queries the response was YES. [2023-11-28 23:52:22,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5516 conditions, 1433 events. 662/1433 cut-off events. For 3699/3724 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8176 event pairs, 143 based on Foata normal form. 16/1447 useless extension candidates. Maximal degree in co-relation 5488. Up to 530 conditions per place. [2023-11-28 23:52:22,268 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 128 selfloop transitions, 43 changer transitions 0/186 dead transitions. [2023-11-28 23:52:22,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 186 transitions, 1809 flow [2023-11-28 23:52:22,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 23:52:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-28 23:52:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2023-11-28 23:52:22,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2023-11-28 23:52:22,269 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 168 transitions. [2023-11-28 23:52:22,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 168 transitions. [2023-11-28 23:52:22,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:52:22,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 168 transitions. [2023-11-28 23:52:22,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 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) [2023-11-28 23:52:22,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:22,272 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:22,272 INFO L175 Difference]: Start difference. First operand has 73 places, 108 transitions, 999 flow. Second operand 7 states and 168 transitions. [2023-11-28 23:52:22,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 186 transitions, 1809 flow [2023-11-28 23:52:22,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 186 transitions, 1737 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-28 23:52:22,295 INFO L231 Difference]: Finished difference. Result has 79 places, 118 transitions, 1153 flow [2023-11-28 23:52:22,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1153, PETRI_PLACES=79, PETRI_TRANSITIONS=118} [2023-11-28 23:52:22,296 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 46 predicate places. [2023-11-28 23:52:22,296 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 118 transitions, 1153 flow [2023-11-28 23:52:22,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:22,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:22,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:22,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 23:52:22,297 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:52:22,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:22,297 INFO L85 PathProgramCache]: Analyzing trace with hash 445304631, now seen corresponding path program 4 times [2023-11-28 23:52:22,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:22,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841049387] [2023-11-28 23:52:22,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:22,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:22,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:22,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841049387] [2023-11-28 23:52:22,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841049387] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:52:22,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:52:22,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 23:52:22,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065371532] [2023-11-28 23:52:22,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:52:22,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 23:52:22,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:22,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 23:52:22,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:52:22,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2023-11-28 23:52:22,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 118 transitions, 1153 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:22,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:22,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2023-11-28 23:52:22,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:52:22,961 INFO L124 PetriNetUnfolderBase]: 658/1430 cut-off events. [2023-11-28 23:52:22,961 INFO L125 PetriNetUnfolderBase]: For 4742/4763 co-relation queries the response was YES. [2023-11-28 23:52:22,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5804 conditions, 1430 events. 658/1430 cut-off events. For 4742/4763 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8199 event pairs, 192 based on Foata normal form. 16/1444 useless extension candidates. Maximal degree in co-relation 5772. Up to 789 conditions per place. [2023-11-28 23:52:22,980 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 124 selfloop transitions, 42 changer transitions 0/181 dead transitions. [2023-11-28 23:52:22,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 181 transitions, 1890 flow [2023-11-28 23:52:22,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 23:52:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-28 23:52:22,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2023-11-28 23:52:22,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.640926640926641 [2023-11-28 23:52:22,982 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 166 transitions. [2023-11-28 23:52:22,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 166 transitions. [2023-11-28 23:52:22,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:52:22,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 166 transitions. [2023-11-28 23:52:22,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:22,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:22,984 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:22,984 INFO L175 Difference]: Start difference. First operand has 79 places, 118 transitions, 1153 flow. Second operand 7 states and 166 transitions. [2023-11-28 23:52:22,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 181 transitions, 1890 flow [2023-11-28 23:52:23,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 181 transitions, 1832 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-11-28 23:52:23,008 INFO L231 Difference]: Finished difference. Result has 85 places, 123 transitions, 1266 flow [2023-11-28 23:52:23,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1266, PETRI_PLACES=85, PETRI_TRANSITIONS=123} [2023-11-28 23:52:23,009 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 52 predicate places. [2023-11-28 23:52:23,009 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 123 transitions, 1266 flow [2023-11-28 23:52:23,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:23,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:23,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:23,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 23:52:23,010 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:52:23,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:23,011 INFO L85 PathProgramCache]: Analyzing trace with hash 825496005, now seen corresponding path program 5 times [2023-11-28 23:52:23,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:23,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421128952] [2023-11-28 23:52:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:23,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:23,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:23,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421128952] [2023-11-28 23:52:23,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421128952] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:52:23,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:52:23,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 23:52:23,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042542464] [2023-11-28 23:52:23,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:52:23,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 23:52:23,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:23,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 23:52:23,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-28 23:52:23,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-28 23:52:23,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 123 transitions, 1266 flow. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:23,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:23,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-28 23:52:23,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:52:24,109 INFO L124 PetriNetUnfolderBase]: 725/1490 cut-off events. [2023-11-28 23:52:24,109 INFO L125 PetriNetUnfolderBase]: For 4593/4595 co-relation queries the response was YES. [2023-11-28 23:52:24,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6046 conditions, 1490 events. 725/1490 cut-off events. For 4593/4595 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7854 event pairs, 245 based on Foata normal form. 7/1496 useless extension candidates. Maximal degree in co-relation 6011. Up to 1042 conditions per place. [2023-11-28 23:52:24,126 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 94 selfloop transitions, 54 changer transitions 0/154 dead transitions. [2023-11-28 23:52:24,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 154 transitions, 1644 flow [2023-11-28 23:52:24,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 23:52:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-28 23:52:24,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 185 transitions. [2023-11-28 23:52:24,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2023-11-28 23:52:24,129 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 185 transitions. [2023-11-28 23:52:24,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 185 transitions. [2023-11-28 23:52:24,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:52:24,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 185 transitions. [2023-11-28 23:52:24,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 14.23076923076923) internal successors, (185), 13 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:24,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 37.0) internal successors, (518), 14 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:24,132 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 37.0) internal successors, (518), 14 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:24,132 INFO L175 Difference]: Start difference. First operand has 85 places, 123 transitions, 1266 flow. Second operand 13 states and 185 transitions. [2023-11-28 23:52:24,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 154 transitions, 1644 flow [2023-11-28 23:52:24,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 154 transitions, 1557 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-11-28 23:52:24,156 INFO L231 Difference]: Finished difference. Result has 99 places, 127 transitions, 1294 flow [2023-11-28 23:52:24,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1294, PETRI_PLACES=99, PETRI_TRANSITIONS=127} [2023-11-28 23:52:24,157 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 66 predicate places. [2023-11-28 23:52:24,157 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 127 transitions, 1294 flow [2023-11-28 23:52:24,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:24,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:24,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:24,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 23:52:24,158 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:52:24,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:24,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1749611465, now seen corresponding path program 6 times [2023-11-28 23:52:24,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:24,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916556411] [2023-11-28 23:52:24,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:24,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:24,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:24,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916556411] [2023-11-28 23:52:24,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916556411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:52:24,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:52:24,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 23:52:24,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925762645] [2023-11-28 23:52:24,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:52:24,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 23:52:24,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:24,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 23:52:24,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:52:24,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-28 23:52:24,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 127 transitions, 1294 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:24,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:24,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-28 23:52:24,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:52:25,071 INFO L124 PetriNetUnfolderBase]: 727/1504 cut-off events. [2023-11-28 23:52:25,071 INFO L125 PetriNetUnfolderBase]: For 5264/5266 co-relation queries the response was YES. [2023-11-28 23:52:25,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6406 conditions, 1504 events. 727/1504 cut-off events. For 5264/5266 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7989 event pairs, 229 based on Foata normal form. 10/1513 useless extension candidates. Maximal degree in co-relation 6365. Up to 1036 conditions per place. [2023-11-28 23:52:25,089 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 94 selfloop transitions, 63 changer transitions 0/163 dead transitions. [2023-11-28 23:52:25,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 163 transitions, 1884 flow [2023-11-28 23:52:25,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 23:52:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-28 23:52:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2023-11-28 23:52:25,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2023-11-28 23:52:25,091 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 144 transitions. [2023-11-28 23:52:25,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 144 transitions. [2023-11-28 23:52:25,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:52:25,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 144 transitions. [2023-11-28 23:52:25,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:25,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:25,093 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:25,093 INFO L175 Difference]: Start difference. First operand has 99 places, 127 transitions, 1294 flow. Second operand 9 states and 144 transitions. [2023-11-28 23:52:25,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 163 transitions, 1884 flow [2023-11-28 23:52:25,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 163 transitions, 1828 flow, removed 24 selfloop flow, removed 1 redundant places. [2023-11-28 23:52:25,122 INFO L231 Difference]: Finished difference. Result has 110 places, 139 transitions, 1575 flow [2023-11-28 23:52:25,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1575, PETRI_PLACES=110, PETRI_TRANSITIONS=139} [2023-11-28 23:52:25,123 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 77 predicate places. [2023-11-28 23:52:25,123 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 139 transitions, 1575 flow [2023-11-28 23:52:25,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:25,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:25,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:25,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-28 23:52:25,124 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:52:25,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:25,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1793151113, now seen corresponding path program 7 times [2023-11-28 23:52:25,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:25,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596746106] [2023-11-28 23:52:25,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:25,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:25,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:25,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596746106] [2023-11-28 23:52:25,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596746106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:52:25,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:52:25,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 23:52:25,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309687827] [2023-11-28 23:52:25,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:52:25,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 23:52:25,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:25,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 23:52:25,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:52:25,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2023-11-28 23:52:25,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 139 transitions, 1575 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:25,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:25,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2023-11-28 23:52:25,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:52:25,899 INFO L124 PetriNetUnfolderBase]: 594/1258 cut-off events. [2023-11-28 23:52:25,899 INFO L125 PetriNetUnfolderBase]: For 4705/4722 co-relation queries the response was YES. [2023-11-28 23:52:25,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5443 conditions, 1258 events. 594/1258 cut-off events. For 4705/4722 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6593 event pairs, 206 based on Foata normal form. 27/1278 useless extension candidates. Maximal degree in co-relation 5396. Up to 876 conditions per place. [2023-11-28 23:52:25,913 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 80 selfloop transitions, 42 changer transitions 5/139 dead transitions. [2023-11-28 23:52:25,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 139 transitions, 1563 flow [2023-11-28 23:52:25,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 23:52:25,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-28 23:52:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2023-11-28 23:52:25,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4486486486486487 [2023-11-28 23:52:25,915 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 166 transitions. [2023-11-28 23:52:25,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 166 transitions. [2023-11-28 23:52:25,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:52:25,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 166 transitions. [2023-11-28 23:52:25,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 16.6) internal successors, (166), 10 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:25,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 37.0) internal successors, (407), 11 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:25,918 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 37.0) internal successors, (407), 11 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:25,918 INFO L175 Difference]: Start difference. First operand has 110 places, 139 transitions, 1575 flow. Second operand 10 states and 166 transitions. [2023-11-28 23:52:25,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 139 transitions, 1563 flow [2023-11-28 23:52:25,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 139 transitions, 1459 flow, removed 14 selfloop flow, removed 9 redundant places. [2023-11-28 23:52:25,947 INFO L231 Difference]: Finished difference. Result has 111 places, 113 transitions, 1161 flow [2023-11-28 23:52:25,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1161, PETRI_PLACES=111, PETRI_TRANSITIONS=113} [2023-11-28 23:52:25,948 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 78 predicate places. [2023-11-28 23:52:25,948 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 113 transitions, 1161 flow [2023-11-28 23:52:25,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:25,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:25,949 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:25,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-28 23:52:25,949 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting workerErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:52:25,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:25,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1262778507, now seen corresponding path program 1 times [2023-11-28 23:52:25,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:25,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125076572] [2023-11-28 23:52:25,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:25,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:26,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:26,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125076572] [2023-11-28 23:52:26,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125076572] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:52:26,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161871939] [2023-11-28 23:52:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:26,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:52:26,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:52:26,307 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:52:26,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 23:52:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:26,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-28 23:52:26,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:52:26,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-28 23:52:26,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-28 23:52:26,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-28 23:52:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:26,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:52:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:27,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161871939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:52:27,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:52:27,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2023-11-28 23:52:27,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224778980] [2023-11-28 23:52:27,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:52:27,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-28 23:52:27,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:27,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-28 23:52:27,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2023-11-28 23:52:27,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2023-11-28 23:52:27,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 113 transitions, 1161 flow. Second operand has 22 states, 22 states have (on average 10.090909090909092) internal successors, (222), 22 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:27,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:27,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2023-11-28 23:52:27,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:52:31,235 INFO L124 PetriNetUnfolderBase]: 4052/8075 cut-off events. [2023-11-28 23:52:31,235 INFO L125 PetriNetUnfolderBase]: For 31253/31614 co-relation queries the response was YES. [2023-11-28 23:52:31,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33686 conditions, 8075 events. 4052/8075 cut-off events. For 31253/31614 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 59403 event pairs, 571 based on Foata normal form. 529/8573 useless extension candidates. Maximal degree in co-relation 33641. Up to 1352 conditions per place. [2023-11-28 23:52:31,313 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 487 selfloop transitions, 488 changer transitions 0/987 dead transitions. [2023-11-28 23:52:31,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 987 transitions, 9824 flow [2023-11-28 23:52:31,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-28 23:52:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-11-28 23:52:31,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 1146 transitions. [2023-11-28 23:52:31,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4839527027027027 [2023-11-28 23:52:31,320 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 1146 transitions. [2023-11-28 23:52:31,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 1146 transitions. [2023-11-28 23:52:31,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:52:31,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 1146 transitions. [2023-11-28 23:52:31,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 17.90625) internal successors, (1146), 64 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:31,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 37.0) internal successors, (2405), 65 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:31,332 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 37.0) internal successors, (2405), 65 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:31,332 INFO L175 Difference]: Start difference. First operand has 111 places, 113 transitions, 1161 flow. Second operand 64 states and 1146 transitions. [2023-11-28 23:52:31,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 987 transitions, 9824 flow [2023-11-28 23:52:31,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 987 transitions, 9384 flow, removed 26 selfloop flow, removed 10 redundant places. [2023-11-28 23:52:31,470 INFO L231 Difference]: Finished difference. Result has 199 places, 615 transitions, 7300 flow [2023-11-28 23:52:31,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=7300, PETRI_PLACES=199, PETRI_TRANSITIONS=615} [2023-11-28 23:52:31,472 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 166 predicate places. [2023-11-28 23:52:31,472 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 615 transitions, 7300 flow [2023-11-28 23:52:31,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.090909090909092) internal successors, (222), 22 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:31,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:31,472 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:31,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 23:52:31,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-28 23:52:31,676 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:52:31,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:31,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1849448347, now seen corresponding path program 1 times [2023-11-28 23:52:31,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:31,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895055737] [2023-11-28 23:52:31,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:31,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:31,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:31,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895055737] [2023-11-28 23:52:31,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895055737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:52:31,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:52:31,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:52:31,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120134724] [2023-11-28 23:52:31,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:52:31,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:52:31,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:31,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:52:31,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:52:31,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2023-11-28 23:52:31,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 615 transitions, 7300 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:31,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:31,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2023-11-28 23:52:31,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:52:33,782 INFO L124 PetriNetUnfolderBase]: 3776/7795 cut-off events. [2023-11-28 23:52:33,783 INFO L125 PetriNetUnfolderBase]: For 122835/122899 co-relation queries the response was YES. [2023-11-28 23:52:33,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45714 conditions, 7795 events. 3776/7795 cut-off events. For 122835/122899 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 59221 event pairs, 1628 based on Foata normal form. 10/7779 useless extension candidates. Maximal degree in co-relation 45634. Up to 6725 conditions per place. [2023-11-28 23:52:33,847 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 496 selfloop transitions, 8 changer transitions 22/603 dead transitions. [2023-11-28 23:52:33,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 603 transitions, 8110 flow [2023-11-28 23:52:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:52:33,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 23:52:33,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2023-11-28 23:52:33,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5135135135135135 [2023-11-28 23:52:33,849 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 95 transitions. [2023-11-28 23:52:33,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 95 transitions. [2023-11-28 23:52:33,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:52:33,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 95 transitions. [2023-11-28 23:52:33,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:33,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:33,850 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:33,850 INFO L175 Difference]: Start difference. First operand has 199 places, 615 transitions, 7300 flow. Second operand 5 states and 95 transitions. [2023-11-28 23:52:33,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 603 transitions, 8110 flow [2023-11-28 23:52:34,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 603 transitions, 7562 flow, removed 274 selfloop flow, removed 1 redundant places. [2023-11-28 23:52:34,362 INFO L231 Difference]: Finished difference. Result has 204 places, 580 transitions, 6295 flow [2023-11-28 23:52:34,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=6473, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6295, PETRI_PLACES=204, PETRI_TRANSITIONS=580} [2023-11-28 23:52:34,363 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 171 predicate places. [2023-11-28 23:52:34,363 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 580 transitions, 6295 flow [2023-11-28 23:52:34,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:34,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:34,364 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:34,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-28 23:52:34,364 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting workerErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:52:34,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:34,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1733082620, now seen corresponding path program 2 times [2023-11-28 23:52:34,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:34,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593322487] [2023-11-28 23:52:34,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:34,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:34,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:34,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593322487] [2023-11-28 23:52:34,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593322487] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:52:34,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780218205] [2023-11-28 23:52:34,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:52:34,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:52:34,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:52:34,967 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:52:34,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 23:52:35,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-28 23:52:35,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:52:35,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-28 23:52:35,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:52:35,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2023-11-28 23:52:35,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-28 23:52:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-28 23:52:35,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:52:35,516 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-28 23:52:35,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 1 [2023-11-28 23:52:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-28 23:52:35,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780218205] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 23:52:35,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:52:35,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12, 8] total 23 [2023-11-28 23:52:35,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658059392] [2023-11-28 23:52:35,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:52:35,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 23:52:35,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:35,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 23:52:35,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2023-11-28 23:52:35,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-28 23:52:35,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 580 transitions, 6295 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:35,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:35,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-28 23:52:35,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:52:38,835 INFO L124 PetriNetUnfolderBase]: 6656/12982 cut-off events. [2023-11-28 23:52:38,835 INFO L125 PetriNetUnfolderBase]: For 204345/204381 co-relation queries the response was YES. [2023-11-28 23:52:38,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73844 conditions, 12982 events. 6656/12982 cut-off events. For 204345/204381 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 102217 event pairs, 705 based on Foata normal form. 72/13051 useless extension candidates. Maximal degree in co-relation 73761. Up to 6569 conditions per place. [2023-11-28 23:52:38,949 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 568 selfloop transitions, 577 changer transitions 0/1151 dead transitions. [2023-11-28 23:52:38,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 1151 transitions, 14423 flow [2023-11-28 23:52:38,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 23:52:38,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-28 23:52:38,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2023-11-28 23:52:38,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46283783783783783 [2023-11-28 23:52:38,951 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 137 transitions. [2023-11-28 23:52:38,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 137 transitions. [2023-11-28 23:52:38,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:52:38,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 137 transitions. [2023-11-28 23:52:38,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:38,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 37.0) internal successors, (333), 9 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:38,952 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 37.0) internal successors, (333), 9 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:38,952 INFO L175 Difference]: Start difference. First operand has 204 places, 580 transitions, 6295 flow. Second operand 8 states and 137 transitions. [2023-11-28 23:52:38,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 1151 transitions, 14423 flow [2023-11-28 23:52:39,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 1151 transitions, 14075 flow, removed 21 selfloop flow, removed 22 redundant places. [2023-11-28 23:52:39,823 INFO L231 Difference]: Finished difference. Result has 186 places, 993 transitions, 12928 flow [2023-11-28 23:52:39,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=6050, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12928, PETRI_PLACES=186, PETRI_TRANSITIONS=993} [2023-11-28 23:52:39,825 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 153 predicate places. [2023-11-28 23:52:39,825 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 993 transitions, 12928 flow [2023-11-28 23:52:39,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:39,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:39,825 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:39,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 23:52:40,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:52:40,026 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting workerErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:52:40,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:40,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1725039050, now seen corresponding path program 3 times [2023-11-28 23:52:40,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:40,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502991399] [2023-11-28 23:52:40,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:40,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:40,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:40,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502991399] [2023-11-28 23:52:40,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502991399] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:52:40,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652626547] [2023-11-28 23:52:40,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:52:40,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:52:40,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:52:40,632 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:52:40,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 23:52:40,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-28 23:52:40,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:52:40,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-28 23:52:40,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:52:41,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2023-11-28 23:52:41,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-28 23:52:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-28 23:52:41,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:52:41,234 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-28 23:52:41,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 1 [2023-11-28 23:52:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-28 23:52:41,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652626547] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 23:52:41,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:52:41,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12, 8] total 23 [2023-11-28 23:52:41,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945796367] [2023-11-28 23:52:41,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:52:41,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 23:52:41,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:41,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 23:52:41,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-11-28 23:52:41,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-28 23:52:41,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 993 transitions, 12928 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:41,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:41,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-28 23:52:41,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:52:45,536 INFO L124 PetriNetUnfolderBase]: 6610/12997 cut-off events. [2023-11-28 23:52:45,536 INFO L125 PetriNetUnfolderBase]: For 239749/239789 co-relation queries the response was YES. [2023-11-28 23:52:45,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82347 conditions, 12997 events. 6610/12997 cut-off events. For 239749/239789 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 102536 event pairs, 967 based on Foata normal form. 59/13005 useless extension candidates. Maximal degree in co-relation 82274. Up to 4964 conditions per place. [2023-11-28 23:52:45,687 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 577 selfloop transitions, 573 changer transitions 0/1155 dead transitions. [2023-11-28 23:52:45,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 1155 transitions, 16727 flow [2023-11-28 23:52:45,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 23:52:45,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 23:52:45,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2023-11-28 23:52:45,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4189189189189189 [2023-11-28 23:52:45,689 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 93 transitions. [2023-11-28 23:52:45,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 93 transitions. [2023-11-28 23:52:45,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:52:45,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 93 transitions. [2023-11-28 23:52:45,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2023-11-28 23:52:45,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:45,691 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:45,691 INFO L175 Difference]: Start difference. First operand has 186 places, 993 transitions, 12928 flow. Second operand 6 states and 93 transitions. [2023-11-28 23:52:45,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 1155 transitions, 16727 flow [2023-11-28 23:52:47,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 1155 transitions, 16202 flow, removed 135 selfloop flow, removed 2 redundant places. [2023-11-28 23:52:47,556 INFO L231 Difference]: Finished difference. Result has 188 places, 1003 transitions, 14242 flow [2023-11-28 23:52:47,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=12393, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=991, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=561, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14242, PETRI_PLACES=188, PETRI_TRANSITIONS=1003} [2023-11-28 23:52:47,557 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 155 predicate places. [2023-11-28 23:52:47,558 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 1003 transitions, 14242 flow [2023-11-28 23:52:47,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:47,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:47,558 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:47,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 23:52:47,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:52:47,759 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:52:47,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:47,759 INFO L85 PathProgramCache]: Analyzing trace with hash 995624159, now seen corresponding path program 1 times [2023-11-28 23:52:47,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:47,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247037331] [2023-11-28 23:52:47,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:47,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:52:48,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:48,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247037331] [2023-11-28 23:52:48,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247037331] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:52:48,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410563554] [2023-11-28 23:52:48,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:48,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:52:48,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:52:48,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:52:48,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 23:52:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:48,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-28 23:52:48,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:52:48,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-28 23:52:48,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-28 23:52:48,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-28 23:52:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:52:48,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:52:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:48,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410563554] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:52:48,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:52:48,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 10] total 20 [2023-11-28 23:52:48,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097103098] [2023-11-28 23:52:48,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:52:48,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-28 23:52:48,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:48,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-28 23:52:48,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2023-11-28 23:52:48,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-28 23:52:48,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 1003 transitions, 14242 flow. Second operand has 21 states, 21 states have (on average 9.714285714285714) internal successors, (204), 21 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:48,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:48,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-28 23:52:48,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:52:55,504 INFO L124 PetriNetUnfolderBase]: 9540/18778 cut-off events. [2023-11-28 23:52:55,504 INFO L125 PetriNetUnfolderBase]: For 326851/326871 co-relation queries the response was YES. [2023-11-28 23:52:55,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122681 conditions, 18778 events. 9540/18778 cut-off events. For 326851/326871 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 148467 event pairs, 2537 based on Foata normal form. 258/19033 useless extension candidates. Maximal degree in co-relation 122608. Up to 10672 conditions per place. [2023-11-28 23:52:55,667 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 1174 selfloop transitions, 859 changer transitions 8/2046 dead transitions. [2023-11-28 23:52:55,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 2046 transitions, 31045 flow [2023-11-28 23:52:55,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-28 23:52:55,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-28 23:52:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 495 transitions. [2023-11-28 23:52:55,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315605928509154 [2023-11-28 23:52:55,670 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 495 transitions. [2023-11-28 23:52:55,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 495 transitions. [2023-11-28 23:52:55,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:52:55,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 495 transitions. [2023-11-28 23:52:55,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 15.96774193548387) internal successors, (495), 31 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:55,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 37.0) internal successors, (1184), 32 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:55,674 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 37.0) internal successors, (1184), 32 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:55,674 INFO L175 Difference]: Start difference. First operand has 188 places, 1003 transitions, 14242 flow. Second operand 31 states and 495 transitions. [2023-11-28 23:52:55,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 2046 transitions, 31045 flow [2023-11-28 23:52:56,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 2046 transitions, 29844 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-11-28 23:52:57,025 INFO L231 Difference]: Finished difference. Result has 238 places, 1665 transitions, 25764 flow [2023-11-28 23:52:57,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=13590, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1003, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=25764, PETRI_PLACES=238, PETRI_TRANSITIONS=1665} [2023-11-28 23:52:57,026 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 205 predicate places. [2023-11-28 23:52:57,026 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 1665 transitions, 25764 flow [2023-11-28 23:52:57,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.714285714285714) internal successors, (204), 21 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:57,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:57,027 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:57,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 23:52:57,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 23:52:57,227 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:52:57,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:57,228 INFO L85 PathProgramCache]: Analyzing trace with hash 864802493, now seen corresponding path program 1 times [2023-11-28 23:52:57,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:57,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796430690] [2023-11-28 23:52:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:57,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:57,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:57,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796430690] [2023-11-28 23:52:57,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796430690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:52:57,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292024680] [2023-11-28 23:52:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:57,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:52:57,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:52:57,717 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:52:57,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 23:52:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:57,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-28 23:52:57,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:52:57,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-28 23:52:57,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-28 23:52:58,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-28 23:52:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:58,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:52:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:58,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292024680] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:52:58,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:52:58,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 10] total 22 [2023-11-28 23:52:58,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199359095] [2023-11-28 23:52:58,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:52:58,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-28 23:52:58,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:58,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-28 23:52:58,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-11-28 23:52:58,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-28 23:52:58,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 1665 transitions, 25764 flow. Second operand has 23 states, 23 states have (on average 9.73913043478261) internal successors, (224), 23 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:58,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:58,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-28 23:52:58,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:53:09,213 INFO L124 PetriNetUnfolderBase]: 10647/21127 cut-off events. [2023-11-28 23:53:09,213 INFO L125 PetriNetUnfolderBase]: For 455074/455183 co-relation queries the response was YES. [2023-11-28 23:53:09,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149473 conditions, 21127 events. 10647/21127 cut-off events. For 455074/455183 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 169333 event pairs, 2139 based on Foata normal form. 360/21486 useless extension candidates. Maximal degree in co-relation 149375. Up to 9305 conditions per place. [2023-11-28 23:53:09,430 INFO L140 encePairwiseOnDemand]: 21/37 looper letters, 865 selfloop transitions, 1459 changer transitions 8/2337 dead transitions. [2023-11-28 23:53:09,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 2337 transitions, 40777 flow [2023-11-28 23:53:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-28 23:53:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-28 23:53:09,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 313 transitions. [2023-11-28 23:53:09,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3845208845208845 [2023-11-28 23:53:09,431 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 313 transitions. [2023-11-28 23:53:09,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 313 transitions. [2023-11-28 23:53:09,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:53:09,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 313 transitions. [2023-11-28 23:53:09,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 14.227272727272727) internal successors, (313), 22 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:53:09,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 37.0) internal successors, (851), 23 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:53:09,433 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 37.0) internal successors, (851), 23 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:53:09,433 INFO L175 Difference]: Start difference. First operand has 238 places, 1665 transitions, 25764 flow. Second operand 22 states and 313 transitions. [2023-11-28 23:53:09,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 2337 transitions, 40777 flow [2023-11-28 23:53:12,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 2337 transitions, 39453 flow, removed 643 selfloop flow, removed 5 redundant places. [2023-11-28 23:53:12,338 INFO L231 Difference]: Finished difference. Result has 265 places, 2178 transitions, 38626 flow [2023-11-28 23:53:12,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=23508, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=942, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=38626, PETRI_PLACES=265, PETRI_TRANSITIONS=2178} [2023-11-28 23:53:12,339 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 232 predicate places. [2023-11-28 23:53:12,339 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 2178 transitions, 38626 flow [2023-11-28 23:53:12,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.73913043478261) internal successors, (224), 23 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:53:12,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:53:12,340 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:53:12,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 23:53:12,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-28 23:53:12,540 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:53:12,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:53:12,541 INFO L85 PathProgramCache]: Analyzing trace with hash -579384736, now seen corresponding path program 2 times [2023-11-28 23:53:12,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:53:12,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743234721] [2023-11-28 23:53:12,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:53:12,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:53:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:53:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:53:13,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:53:13,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743234721] [2023-11-28 23:53:13,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743234721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:53:13,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363602388] [2023-11-28 23:53:13,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:53:13,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:53:13,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:53:13,088 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:53:13,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 23:53:13,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:53:13,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:53:13,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-28 23:53:13,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:53:13,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-28 23:53:13,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-28 23:53:13,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-28 23:53:13,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-28 23:53:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:53:13,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:53:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:53:14,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363602388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:53:14,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:53:14,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 32 [2023-11-28 23:53:14,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730472813] [2023-11-28 23:53:14,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:53:14,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-28 23:53:14,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:53:14,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-28 23:53:14,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2023-11-28 23:53:14,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-28 23:53:14,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 2178 transitions, 38626 flow. Second operand has 32 states, 32 states have (on average 9.40625) internal successors, (301), 32 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:53:14,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:53:14,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-28 23:53:14,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:53:48,011 INFO L124 PetriNetUnfolderBase]: 22286/43888 cut-off events. [2023-11-28 23:53:48,011 INFO L125 PetriNetUnfolderBase]: For 1029808/1029879 co-relation queries the response was YES. [2023-11-28 23:53:48,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337616 conditions, 43888 events. 22286/43888 cut-off events. For 1029808/1029879 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 382505 event pairs, 3584 based on Foata normal form. 412/44291 useless extension candidates. Maximal degree in co-relation 337507. Up to 8959 conditions per place. [2023-11-28 23:53:48,642 INFO L140 encePairwiseOnDemand]: 21/37 looper letters, 2028 selfloop transitions, 4309 changer transitions 6/6348 dead transitions. [2023-11-28 23:53:48,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 6348 transitions, 120715 flow [2023-11-28 23:53:48,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-28 23:53:48,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-11-28 23:53:48,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 1014 transitions. [2023-11-28 23:53:48,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435006435006435 [2023-11-28 23:53:48,645 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 1014 transitions. [2023-11-28 23:53:48,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 1014 transitions. [2023-11-28 23:53:48,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:53:48,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 1014 transitions. [2023-11-28 23:53:48,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 16.095238095238095) internal successors, (1014), 63 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:53:48,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 37.0) internal successors, (2368), 64 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:53:48,651 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 37.0) internal successors, (2368), 64 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:53:48,651 INFO L175 Difference]: Start difference. First operand has 265 places, 2178 transitions, 38626 flow. Second operand 63 states and 1014 transitions. [2023-11-28 23:53:48,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 6348 transitions, 120715 flow [2023-11-28 23:54:04,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 6348 transitions, 115487 flow, removed 2473 selfloop flow, removed 7 redundant places. [2023-11-28 23:54:04,457 INFO L231 Difference]: Finished difference. Result has 363 places, 5245 transitions, 108632 flow [2023-11-28 23:54:04,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=37530, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=108632, PETRI_PLACES=363, PETRI_TRANSITIONS=5245} [2023-11-28 23:54:04,459 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 330 predicate places. [2023-11-28 23:54:04,459 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 5245 transitions, 108632 flow [2023-11-28 23:54:04,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.40625) internal successors, (301), 32 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:54:04,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:54:04,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:54:04,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 23:54:04,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-28 23:54:04,661 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:54:04,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:54:04,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1187564628, now seen corresponding path program 3 times [2023-11-28 23:54:04,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:54:04,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784806430] [2023-11-28 23:54:04,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:54:04,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:54:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:54:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:54:05,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:54:05,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784806430] [2023-11-28 23:54:05,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784806430] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:54:05,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481532795] [2023-11-28 23:54:05,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:54:05,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:54:05,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:54:05,281 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:54:05,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 23:54:05,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 23:54:05,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:54:05,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-28 23:54:05,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:54:05,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-28 23:54:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:54:05,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:54:05,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2023-11-28 23:54:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:54:05,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481532795] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 23:54:05,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:54:05,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 16 [2023-11-28 23:54:05,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729998547] [2023-11-28 23:54:05,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:54:05,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:54:05,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:54:05,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:54:05,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-28 23:54:05,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2023-11-28 23:54:05,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 5245 transitions, 108632 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:54:05,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:54:05,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2023-11-28 23:54:05,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:55:24,221 INFO L124 PetriNetUnfolderBase]: 27706/57708 cut-off events. [2023-11-28 23:55:24,221 INFO L125 PetriNetUnfolderBase]: For 1182435/1183567 co-relation queries the response was YES. [2023-11-28 23:55:25,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472819 conditions, 57708 events. 27706/57708 cut-off events. For 1182435/1183567 co-relation queries the response was YES. Maximal size of possible extension queue 1264. Compared 561715 event pairs, 1611 based on Foata normal form. 1800/59040 useless extension candidates. Maximal degree in co-relation 472672. Up to 24040 conditions per place. [2023-11-28 23:55:25,369 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 7303 selfloop transitions, 1755 changer transitions 173/10005 dead transitions. [2023-11-28 23:55:25,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 10005 transitions, 229905 flow [2023-11-28 23:55:25,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 23:55:25,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-28 23:55:25,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2023-11-28 23:55:25,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5984555984555985 [2023-11-28 23:55:25,371 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 155 transitions. [2023-11-28 23:55:25,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 155 transitions. [2023-11-28 23:55:25,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:55:25,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 155 transitions. [2023-11-28 23:55:25,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:55:25,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:55:25,372 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:55:25,372 INFO L175 Difference]: Start difference. First operand has 363 places, 5245 transitions, 108632 flow. Second operand 7 states and 155 transitions. [2023-11-28 23:55:25,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 10005 transitions, 229905 flow [2023-11-28 23:56:11,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 10005 transitions, 219240 flow, removed 5330 selfloop flow, removed 1 redundant places. [2023-11-28 23:56:11,269 INFO L231 Difference]: Finished difference. Result has 369 places, 5980 transitions, 118521 flow [2023-11-28 23:56:11,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=100772, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=896, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3913, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=118521, PETRI_PLACES=369, PETRI_TRANSITIONS=5980} [2023-11-28 23:56:11,272 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 336 predicate places. [2023-11-28 23:56:11,272 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 5980 transitions, 118521 flow [2023-11-28 23:56:11,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:56:11,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:56:11,273 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:56:11,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 23:56:11,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 23:56:11,473 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:56:11,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:56:11,474 INFO L85 PathProgramCache]: Analyzing trace with hash 240053222, now seen corresponding path program 4 times [2023-11-28 23:56:11,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:56:11,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572330135] [2023-11-28 23:56:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:56:11,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:56:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:56:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:56:11,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:56:11,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572330135] [2023-11-28 23:56:11,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572330135] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:56:11,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922027452] [2023-11-28 23:56:11,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 23:56:11,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:56:11,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:56:11,741 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:56:11,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 23:56:11,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 23:56:11,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:56:11,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-28 23:56:11,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:56:11,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-28 23:56:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:56:11,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:56:11,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2023-11-28 23:56:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:56:11,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922027452] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:56:11,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:56:11,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-11-28 23:56:11,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342171391] [2023-11-28 23:56:11,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:56:11,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-28 23:56:11,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:56:11,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-28 23:56:11,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-28 23:56:11,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2023-11-28 23:56:11,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 5980 transitions, 118521 flow. Second operand has 13 states, 13 states have (on average 15.461538461538462) internal successors, (201), 13 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:56:11,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:56:11,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2023-11-28 23:56:11,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:57:50,419 INFO L124 PetriNetUnfolderBase]: 27468/56937 cut-off events. [2023-11-28 23:57:50,419 INFO L125 PetriNetUnfolderBase]: For 1064843/1066405 co-relation queries the response was YES. [2023-11-28 23:57:51,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471075 conditions, 56937 events. 27468/56937 cut-off events. For 1064843/1066405 co-relation queries the response was YES. Maximal size of possible extension queue 1269. Compared 552935 event pairs, 1247 based on Foata normal form. 1031/57498 useless extension candidates. Maximal degree in co-relation 470927. Up to 15139 conditions per place. [2023-11-28 23:57:51,740 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 8639 selfloop transitions, 1180 changer transitions 45/10638 dead transitions. [2023-11-28 23:57:51,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 10638 transitions, 239687 flow [2023-11-28 23:57:51,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 23:57:51,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-28 23:57:51,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 249 transitions. [2023-11-28 23:57:51,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176715176715176 [2023-11-28 23:57:51,742 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 249 transitions. [2023-11-28 23:57:51,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 249 transitions. [2023-11-28 23:57:51,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:57:51,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 249 transitions. [2023-11-28 23:57:51,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 19.153846153846153) internal successors, (249), 13 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:51,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 37.0) internal successors, (518), 14 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:51,744 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 37.0) internal successors, (518), 14 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:51,744 INFO L175 Difference]: Start difference. First operand has 369 places, 5980 transitions, 118521 flow. Second operand 13 states and 249 transitions. [2023-11-28 23:57:51,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 10638 transitions, 239687 flow [2023-11-28 23:58:33,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 10638 transitions, 239639 flow, removed 24 selfloop flow, removed 0 redundant places. [2023-11-28 23:58:33,952 INFO L231 Difference]: Finished difference. Result has 381 places, 6063 transitions, 122117 flow [2023-11-28 23:58:33,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=118479, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5980, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1097, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4883, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=122117, PETRI_PLACES=381, PETRI_TRANSITIONS=6063} [2023-11-28 23:58:33,957 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 348 predicate places. [2023-11-28 23:58:33,957 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 6063 transitions, 122117 flow [2023-11-28 23:58:33,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.461538461538462) internal successors, (201), 13 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:58:33,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:58:33,957 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:58:33,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 23:58:34,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 23:58:34,158 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-28 23:58:34,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:58:34,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1308009026, now seen corresponding path program 5 times [2023-11-28 23:58:34,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:58:34,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99475420] [2023-11-28 23:58:34,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:58:34,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:58:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:58:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:58:34,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:58:34,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99475420] [2023-11-28 23:58:34,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99475420] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:58:34,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819316397] [2023-11-28 23:58:34,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 23:58:34,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:58:34,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:58:34,614 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:58:34,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 23:58:34,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:58:34,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:58:34,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-28 23:58:34,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:58:34,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-28 23:58:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 23:58:34,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:58:34,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2023-11-28 23:58:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 23:58:34,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819316397] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 23:58:34,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:58:34,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 18 [2023-11-28 23:58:34,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076015736] [2023-11-28 23:58:34,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:58:34,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:58:34,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:58:34,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:58:34,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-11-28 23:58:34,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2023-11-28 23:58:34,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 6063 transitions, 122117 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:58:34,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:58:34,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2023-11-28 23:58:34,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:00:08,084 INFO L124 PetriNetUnfolderBase]: 23982/50785 cut-off events. [2023-11-29 00:00:08,084 INFO L125 PetriNetUnfolderBase]: For 1013970/1015554 co-relation queries the response was YES. [2023-11-29 00:00:08,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438897 conditions, 50785 events. 23982/50785 cut-off events. For 1013970/1015554 co-relation queries the response was YES. Maximal size of possible extension queue 1018. Compared 491463 event pairs, 1463 based on Foata normal form. 1671/51990 useless extension candidates. Maximal degree in co-relation 438747. Up to 12492 conditions per place. [2023-11-29 00:00:09,196 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 5282 selfloop transitions, 2557 changer transitions 31/8633 dead transitions. [2023-11-29 00:00:09,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 8633 transitions, 195603 flow [2023-11-29 00:00:09,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:00:09,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:00:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2023-11-29 00:00:09,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6531531531531531 [2023-11-29 00:00:09,198 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 145 transitions. [2023-11-29 00:00:09,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 145 transitions. [2023-11-29 00:00:09,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:00:09,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 145 transitions. [2023-11-29 00:00:09,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 00:00:09,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 00:00:09,199 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 00:00:09,200 INFO L175 Difference]: Start difference. First operand has 381 places, 6063 transitions, 122117 flow. Second operand 6 states and 145 transitions. [2023-11-29 00:00:09,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 8633 transitions, 195603 flow [2023-11-29 00:00:43,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 8633 transitions, 194316 flow, removed 449 selfloop flow, removed 9 redundant places. [2023-11-29 00:00:43,319 INFO L231 Difference]: Finished difference. Result has 379 places, 6197 transitions, 131678 flow [2023-11-29 00:00:43,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=117848, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=131678, PETRI_PLACES=379, PETRI_TRANSITIONS=6197} [2023-11-29 00:00:43,324 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 346 predicate places. [2023-11-29 00:00:43,324 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 6197 transitions, 131678 flow [2023-11-29 00:00:43,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 00:00:43,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:00:43,325 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:00:43,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:00:43,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:00:43,525 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-29 00:00:43,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:00:43,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1662695710, now seen corresponding path program 6 times [2023-11-29 00:00:43,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:00:43,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625056993] [2023-11-29 00:00:43,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:00:43,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:00:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:00:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:00:43,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:00:43,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625056993] [2023-11-29 00:00:43,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625056993] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:00:43,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:00:43,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:00:43,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742428735] [2023-11-29 00:00:43,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:00:43,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:00:43,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:00:43,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:00:43,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:00:43,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2023-11-29 00:00:43,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 6197 transitions, 131678 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 00:00:43,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:00:43,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2023-11-29 00:00:43,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:01:18,333 INFO L124 PetriNetUnfolderBase]: 6831/16626 cut-off events. [2023-11-29 00:01:18,333 INFO L125 PetriNetUnfolderBase]: For 367672/368204 co-relation queries the response was YES. [2023-11-29 00:01:18,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155313 conditions, 16626 events. 6831/16626 cut-off events. For 367672/368204 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 146631 event pairs, 868 based on Foata normal form. 371/16840 useless extension candidates. Maximal degree in co-relation 155179. Up to 6655 conditions per place. [2023-11-29 00:01:18,645 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 2646 selfloop transitions, 941 changer transitions 110/4023 dead transitions. [2023-11-29 00:01:18,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 4023 transitions, 94358 flow [2023-11-29 00:01:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:01:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:01:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2023-11-29 00:01:18,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2023-11-29 00:01:18,646 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 126 transitions. [2023-11-29 00:01:18,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 126 transitions. [2023-11-29 00:01:18,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:01:18,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 126 transitions. [2023-11-29 00:01:18,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.0) internal successors, (126), 6 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 00:01:18,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 00:01:18,647 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 00:01:18,647 INFO L175 Difference]: Start difference. First operand has 379 places, 6197 transitions, 131678 flow. Second operand 6 states and 126 transitions. [2023-11-29 00:01:18,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 4023 transitions, 94358 flow [2023-11-29 00:01:23,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 4023 transitions, 84047 flow, removed 745 selfloop flow, removed 36 redundant places. [2023-11-29 00:01:23,920 INFO L231 Difference]: Finished difference. Result has 326 places, 3600 transitions, 72266 flow [2023-11-29 00:01:23,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=69592, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=871, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=72266, PETRI_PLACES=326, PETRI_TRANSITIONS=3600} [2023-11-29 00:01:23,923 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 293 predicate places. [2023-11-29 00:01:23,924 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 3600 transitions, 72266 flow [2023-11-29 00:01:23,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 00:01:23,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:01:23,924 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:01:23,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-29 00:01:23,924 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-29 00:01:23,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:01:23,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1760923242, now seen corresponding path program 7 times [2023-11-29 00:01:23,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:01:23,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018984931] [2023-11-29 00:01:23,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:01:23,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:01:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:24,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:01:24,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018984931] [2023-11-29 00:01:24,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018984931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:01:24,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112260388] [2023-11-29 00:01:24,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:01:24,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:24,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:01:24,472 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:01:24,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:01:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:24,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-29 00:01:24,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:01:24,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:01:24,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 00:01:24,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 00:01:24,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 00:01:25,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 00:01:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:25,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:01:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:25,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112260388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:01:25,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:01:25,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 15] total 37 [2023-11-29 00:01:25,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555088238] [2023-11-29 00:01:25,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:01:25,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 00:01:25,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:01:25,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 00:01:25,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1206, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 00:01:25,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 00:01:25,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 3600 transitions, 72266 flow. Second operand has 38 states, 38 states have (on average 9.763157894736842) internal successors, (371), 38 states have internal predecessors, (371), 0 states have call successors, (0), 0 states 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 00:01:25,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:01:25,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 00:01:25,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:01:52,381 INFO L124 PetriNetUnfolderBase]: 9111/21809 cut-off events. [2023-11-29 00:01:52,382 INFO L125 PetriNetUnfolderBase]: For 375891/376275 co-relation queries the response was YES. [2023-11-29 00:01:52,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184745 conditions, 21809 events. 9111/21809 cut-off events. For 375891/376275 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 200506 event pairs, 928 based on Foata normal form. 387/22193 useless extension candidates. Maximal degree in co-relation 184637. Up to 6459 conditions per place. [2023-11-29 00:01:52,716 INFO L140 encePairwiseOnDemand]: 21/37 looper letters, 1377 selfloop transitions, 3824 changer transitions 92/5298 dead transitions. [2023-11-29 00:01:52,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 5298 transitions, 116347 flow [2023-11-29 00:01:52,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 00:01:52,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 00:01:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 350 transitions. [2023-11-29 00:01:52,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33783783783783783 [2023-11-29 00:01:52,718 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 350 transitions. [2023-11-29 00:01:52,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 350 transitions. [2023-11-29 00:01:52,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:01:52,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 350 transitions. [2023-11-29 00:01:52,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 12.5) internal successors, (350), 28 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 00:01:52,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 37.0) internal successors, (1073), 29 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states 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 00:01:52,722 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 37.0) internal successors, (1073), 29 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states 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 00:01:52,722 INFO L175 Difference]: Start difference. First operand has 326 places, 3600 transitions, 72266 flow. Second operand 28 states and 350 transitions. [2023-11-29 00:01:52,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 5298 transitions, 116347 flow [2023-11-29 00:01:57,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 5298 transitions, 113667 flow, removed 184 selfloop flow, removed 11 redundant places. [2023-11-29 00:01:57,242 INFO L231 Difference]: Finished difference. Result has 340 places, 5038 transitions, 113864 flow [2023-11-29 00:01:57,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=69800, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2670, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=113864, PETRI_PLACES=340, PETRI_TRANSITIONS=5038} [2023-11-29 00:01:57,245 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 307 predicate places. [2023-11-29 00:01:57,245 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 5038 transitions, 113864 flow [2023-11-29 00:01:57,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.763157894736842) internal successors, (371), 38 states have internal predecessors, (371), 0 states have call successors, (0), 0 states 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 00:01:57,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:01:57,246 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:01:57,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 00:01:57,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 00:01:57,447 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-29 00:01:57,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:01:57,447 INFO L85 PathProgramCache]: Analyzing trace with hash 477837375, now seen corresponding path program 8 times [2023-11-29 00:01:57,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:01:57,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280138838] [2023-11-29 00:01:57,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:01:57,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:01:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:58,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:01:58,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280138838] [2023-11-29 00:01:58,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280138838] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:01:58,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815050585] [2023-11-29 00:01:58,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:01:58,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:58,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:01:58,065 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:01:58,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:01:58,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:01:58,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:01:58,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 00:01:58,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:01:58,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 00:01:58,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-29 00:01:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 00:01:58,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:01:58,846 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-29 00:01:58,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 55 [2023-11-29 00:01:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 00:01:58,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815050585] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:01:58,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:01:58,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 9] total 37 [2023-11-29 00:01:58,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932587882] [2023-11-29 00:01:58,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:01:58,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 00:01:58,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:01:58,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 00:01:58,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 00:01:58,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-29 00:01:58,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 5038 transitions, 113864 flow. Second operand has 37 states, 37 states have (on average 9.91891891891892) internal successors, (367), 37 states have internal predecessors, (367), 0 states have call successors, (0), 0 states 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 00:01:58,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:01:58,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-29 00:01:58,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:02:51,074 INFO L124 PetriNetUnfolderBase]: 11549/27734 cut-off events. [2023-11-29 00:02:51,074 INFO L125 PetriNetUnfolderBase]: For 547451/547845 co-relation queries the response was YES. [2023-11-29 00:02:51,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254071 conditions, 27734 events. 11549/27734 cut-off events. For 547451/547845 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 267842 event pairs, 902 based on Foata normal form. 296/28029 useless extension candidates. Maximal degree in co-relation 253955. Up to 9393 conditions per place. [2023-11-29 00:02:51,448 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 0 selfloop transitions, 0 changer transitions 7163/7163 dead transitions. [2023-11-29 00:02:51,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 7163 transitions, 174480 flow [2023-11-29 00:02:51,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 00:02:51,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-29 00:02:51,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 520 transitions. [2023-11-29 00:02:51,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34278180619644033 [2023-11-29 00:02:51,450 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 520 transitions. [2023-11-29 00:02:51,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 520 transitions. [2023-11-29 00:02:51,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:02:51,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 520 transitions. [2023-11-29 00:02:51,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 12.682926829268293) internal successors, (520), 41 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 00:02:51,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 37.0) internal successors, (1554), 42 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states 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 00:02:51,453 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 37.0) internal successors, (1554), 42 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states 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 00:02:51,453 INFO L175 Difference]: Start difference. First operand has 340 places, 5038 transitions, 113864 flow. Second operand 41 states and 520 transitions. [2023-11-29 00:02:51,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 7163 transitions, 174480 flow [2023-11-29 00:03:01,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 7163 transitions, 167213 flow, removed 3243 selfloop flow, removed 10 redundant places. [2023-11-29 00:03:01,690 INFO L231 Difference]: Finished difference. Result has 359 places, 0 transitions, 0 flow [2023-11-29 00:03:01,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=108297, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4977, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4977, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=0, PETRI_PLACES=359, PETRI_TRANSITIONS=0} [2023-11-29 00:03:01,694 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 326 predicate places. [2023-11-29 00:03:01,694 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 0 transitions, 0 flow [2023-11-29 00:03:01,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 9.91891891891892) internal successors, (367), 37 states have internal predecessors, (367), 0 states have call successors, (0), 0 states 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 00:03:01,696 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-29 00:03:01,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-29 00:03:01,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-29 00:03:01,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-29 00:03:01,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-29 00:03:01,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:03:01,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 00:03:01,898 INFO L445 BasicCegarLoop]: Path program histogram: [8, 7, 3, 1, 1, 1, 1] [2023-11-29 00:03:01,903 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-29 00:03:01,903 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 00:03:01,907 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 12:03:01 BasicIcfg [2023-11-29 00:03:01,907 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 00:03:01,907 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 00:03:01,907 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 00:03:01,907 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 00:03:01,908 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:52:18" (3/4) ... [2023-11-29 00:03:01,909 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-29 00:03:01,912 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure worker [2023-11-29 00:03:01,916 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 48 nodes and edges [2023-11-29 00:03:01,917 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2023-11-29 00:03:01,917 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2023-11-29 00:03:01,917 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-29 00:03:01,988 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 00:03:01,989 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/bin/uautomizer-verify-BQ2R08f2Ya/witness.yml [2023-11-29 00:03:01,989 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 00:03:01,990 INFO L158 Benchmark]: Toolchain (without parser) took 644625.68ms. Allocated memory was 138.4MB in the beginning and 6.2GB in the end (delta: 6.1GB). Free memory was 98.1MB in the beginning and 2.5GB in the end (delta: -2.4GB). Peak memory consumption was 3.7GB. Max. memory is 16.1GB. [2023-11-29 00:03:01,990 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 138.4MB. Free memory is still 109.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 00:03:01,991 INFO L158 Benchmark]: CACSL2BoogieTranslator took 429.81ms. Allocated memory is still 138.4MB. Free memory was 98.1MB in the beginning and 77.6MB in the end (delta: 20.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-11-29 00:03:01,991 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.79ms. Allocated memory is still 138.4MB. Free memory was 77.6MB in the beginning and 75.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 00:03:01,992 INFO L158 Benchmark]: Boogie Preprocessor took 49.05ms. Allocated memory is still 138.4MB. Free memory was 75.5MB in the beginning and 72.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 00:03:01,992 INFO L158 Benchmark]: RCFGBuilder took 592.16ms. Allocated memory was 138.4MB in the beginning and 178.3MB in the end (delta: 39.8MB). Free memory was 72.9MB in the beginning and 136.9MB in the end (delta: -64.0MB). Peak memory consumption was 31.4MB. Max. memory is 16.1GB. [2023-11-29 00:03:01,993 INFO L158 Benchmark]: TraceAbstraction took 643422.35ms. Allocated memory was 178.3MB in the beginning and 6.2GB in the end (delta: 6.1GB). Free memory was 136.8MB in the beginning and 2.5GB in the end (delta: -2.4GB). Peak memory consumption was 4.6GB. Max. memory is 16.1GB. [2023-11-29 00:03:01,994 INFO L158 Benchmark]: Witness Printer took 81.87ms. Allocated memory is still 6.2GB. Free memory was 2.5GB in the beginning and 2.5GB in the end (delta: 4.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 00:03:01,996 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 138.4MB. Free memory is still 109.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 429.81ms. Allocated memory is still 138.4MB. Free memory was 98.1MB in the beginning and 77.6MB in the end (delta: 20.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.79ms. Allocated memory is still 138.4MB. Free memory was 77.6MB in the beginning and 75.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.05ms. Allocated memory is still 138.4MB. Free memory was 75.5MB in the beginning and 72.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 592.16ms. Allocated memory was 138.4MB in the beginning and 178.3MB in the end (delta: 39.8MB). Free memory was 72.9MB in the beginning and 136.9MB in the end (delta: -64.0MB). Peak memory consumption was 31.4MB. Max. memory is 16.1GB. * TraceAbstraction took 643422.35ms. Allocated memory was 178.3MB in the beginning and 6.2GB in the end (delta: 6.1GB). Free memory was 136.8MB in the beginning and 2.5GB in the end (delta: -2.4GB). Peak memory consumption was 4.6GB. Max. memory is 16.1GB. * Witness Printer took 81.87ms. Allocated memory is still 6.2GB. Free memory was 2.5GB in the beginning and 2.5GB in the end (delta: 4.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 19]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 54 locations, 5 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: 643.3s, OverallIterations: 22, TraceHistogramMax: 3, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 624.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3698 SdHoareTripleChecker+Valid, 9.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3655 mSDsluCounter, 1049 SdHoareTripleChecker+Invalid, 7.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 995 mSDsCounter, 359 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11652 IncrementalHoareTripleChecker+Invalid, 12011 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 359 mSolverCounterUnsat, 54 mSDtfsCounter, 11652 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1187 GetRequests, 650 SyntacticMatches, 4 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7372 ImplicationChecksByTransitivity, 9.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=131678occurred in iteration=19, InterpolantAutomatonStates: 378, 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: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 14.4s InterpolantComputationTime, 854 NumberOfCodeBlocks, 827 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 1151 ConstructedInterpolants, 20 QuantifiedInterpolants, 14455 SizeOfPredicates, 205 NumberOfNonLiveVariables, 2290 ConjunctsInSsa, 477 ConjunctsInUnsatCore, 44 InterpolantComputations, 15 PerfectInterpolantSequences, 201/397 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-29 00:03:02,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b6b3b51-85bc-4903-9611-2b2aef9b24f9/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 Result: TRUE