./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/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_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/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_6f9d07e6-1a68-463e-92a0-e2eb93265b84/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 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:30:59,756 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:30:59,823 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 03:30:59,829 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:30:59,830 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:30:59,857 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:30:59,858 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:30:59,858 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:30:59,859 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:30:59,860 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:30:59,860 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:30:59,861 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:30:59,862 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:30:59,862 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:30:59,863 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:30:59,864 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:30:59,864 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:30:59,865 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:30:59,865 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:30:59,866 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:30:59,866 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:30:59,867 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:30:59,867 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:30:59,868 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:30:59,868 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:30:59,869 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:30:59,869 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:30:59,870 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:30:59,870 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:30:59,871 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:30:59,871 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:30:59,871 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:30:59,872 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:30:59,872 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:30:59,872 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:30:59,873 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:30:59,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:30:59,873 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:30:59,873 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:30:59,873 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:30:59,874 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:30:59,874 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:30:59,874 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_6f9d07e6-1a68-463e-92a0-e2eb93265b84/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 [2023-11-29 03:31:00,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:31:00,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:31:00,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:31:00,131 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:31:00,131 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:31:00,133 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2023-11-29 03:31:02,971 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:31:03,168 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:31:03,169 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2023-11-29 03:31:03,176 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/data/31fb848fe/c4b22af1493a472faa49c27bb68ef746/FLAGde196725f [2023-11-29 03:31:03,191 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/data/31fb848fe/c4b22af1493a472faa49c27bb68ef746 [2023-11-29 03:31:03,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:31:03,194 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:31:03,195 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:31:03,196 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:31:03,201 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:31:03,203 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:31:03" (1/1) ... [2023-11-29 03:31:03,204 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@790ba9c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:31:03, skipping insertion in model container [2023-11-29 03:31:03,204 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:31:03" (1/1) ... [2023-11-29 03:31:03,231 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:31:03,408 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_6f9d07e6-1a68-463e-92a0-e2eb93265b84/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3095,3108] [2023-11-29 03:31:03,418 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:31:03,430 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:31:03,456 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_6f9d07e6-1a68-463e-92a0-e2eb93265b84/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c[3095,3108] [2023-11-29 03:31:03,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:31:03,469 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 03:31:03,470 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 03:31:03,477 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:31:03,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:31:03 WrapperNode [2023-11-29 03:31:03,477 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:31:03,478 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:31:03,479 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:31:03,479 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:31:03,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:31:03" (1/1) ... [2023-11-29 03:31:03,495 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:31:03" (1/1) ... [2023-11-29 03:31:03,525 INFO L138 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 173 [2023-11-29 03:31:03,526 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:31:03,527 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:31:03,527 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:31:03,527 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:31:03,538 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:31:03" (1/1) ... [2023-11-29 03:31:03,539 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:31:03" (1/1) ... [2023-11-29 03:31:03,543 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:31:03" (1/1) ... [2023-11-29 03:31:03,562 INFO L175 MemorySlicer]: Split 11 memory accesses to 5 slices as follows [2, 2, 3, 2, 2]. 27 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-29 03:31:03,562 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:31:03" (1/1) ... [2023-11-29 03:31:03,563 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:31:03" (1/1) ... [2023-11-29 03:31:03,573 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:31:03" (1/1) ... [2023-11-29 03:31:03,577 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:31:03" (1/1) ... [2023-11-29 03:31:03,580 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:31:03" (1/1) ... [2023-11-29 03:31:03,582 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:31:03" (1/1) ... [2023-11-29 03:31:03,586 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:31:03,588 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:31:03,588 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:31:03,588 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:31:03,589 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:31:03" (1/1) ... [2023-11-29 03:31:03,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:31:03,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:03,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:31:03,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:31:03,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:31:03,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 03:31:03,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 03:31:03,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 03:31:03,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 03:31:03,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 03:31:03,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 03:31:03,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 03:31:03,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 03:31:03,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 03:31:03,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 03:31:03,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 03:31:03,665 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 03:31:03,665 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 03:31:03,665 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 03:31:03,665 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 03:31:03,665 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 03:31:03,666 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 03:31:03,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:31:03,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 03:31:03,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 03:31:03,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 03:31:03,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 03:31:03,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 03:31:03,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 03:31:03,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 03:31:03,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:31:03,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:31:03,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 03:31:03,669 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 03:31:03,801 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:31:03,803 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:31:04,071 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:31:04,321 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:31:04,322 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 03:31:04,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:31:04 BoogieIcfgContainer [2023-11-29 03:31:04,323 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:31:04,326 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:31:04,326 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:31:04,329 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:31:04,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:31:03" (1/3) ... [2023-11-29 03:31:04,331 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13099741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:31:04, skipping insertion in model container [2023-11-29 03:31:04,331 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:31:03" (2/3) ... [2023-11-29 03:31:04,331 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13099741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:31:04, skipping insertion in model container [2023-11-29 03:31:04,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:31:04" (3/3) ... [2023-11-29 03:31:04,333 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2023-11-29 03:31:04,343 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 03:31:04,355 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:31:04,355 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 03:31:04,355 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 03:31:04,422 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 03:31:04,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 39 transitions, 99 flow [2023-11-29 03:31:04,485 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2023-11-29 03:31:04,485 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 03:31:04,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 36 events. 4/36 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 60 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2023-11-29 03:31:04,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 39 transitions, 99 flow [2023-11-29 03:31:04,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 35 transitions, 88 flow [2023-11-29 03:31:04,504 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:31:04,511 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;@5f0cadfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:31:04,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 03:31:04,525 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 03:31:04,525 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2023-11-29 03:31:04,525 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 03:31:04,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:31:04,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:04,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:31:04,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:04,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1956098430, now seen corresponding path program 1 times [2023-11-29 03:31:04,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:04,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238807115] [2023-11-29 03:31:04,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:04,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:05,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:05,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238807115] [2023-11-29 03:31:05,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238807115] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:31:05,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:31:05,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 03:31:05,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600625814] [2023-11-29 03:31:05,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:31:05,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 03:31:05,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:05,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 03:31:05,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 03:31:05,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2023-11-29 03:31:05,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 88 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 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 03:31:05,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:31:05,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2023-11-29 03:31:05,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:31:05,640 INFO L124 PetriNetUnfolderBase]: 865/1410 cut-off events. [2023-11-29 03:31:05,640 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2023-11-29 03:31:05,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2828 conditions, 1410 events. 865/1410 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6809 event pairs, 151 based on Foata normal form. 92/1484 useless extension candidates. Maximal degree in co-relation 2448. Up to 433 conditions per place. [2023-11-29 03:31:05,656 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 61 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-11-29 03:31:05,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 73 transitions, 311 flow [2023-11-29 03:31:05,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:31:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 03:31:05,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2023-11-29 03:31:05,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470085470085471 [2023-11-29 03:31:05,670 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 128 transitions. [2023-11-29 03:31:05,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 128 transitions. [2023-11-29 03:31:05,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:31:05,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 128 transitions. [2023-11-29 03:31:05,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 03:31:05,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states 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 03:31:05,681 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states 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 03:31:05,683 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 88 flow. Second operand 6 states and 128 transitions. [2023-11-29 03:31:05,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 73 transitions, 311 flow [2023-11-29 03:31:05,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 73 transitions, 289 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 03:31:05,692 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 102 flow [2023-11-29 03:31:05,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-11-29 03:31:05,697 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2023-11-29 03:31:05,697 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 102 flow [2023-11-29 03:31:05,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 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 03:31:05,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:31:05,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:05,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 03:31:05,699 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:31:05,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:05,700 INFO L85 PathProgramCache]: Analyzing trace with hash 359614103, now seen corresponding path program 1 times [2023-11-29 03:31:05,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:05,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997214252] [2023-11-29 03:31:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:05,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:05,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:05,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997214252] [2023-11-29 03:31:05,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997214252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:31:05,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:31:05,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:31:05,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134058885] [2023-11-29 03:31:05,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:31:05,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:31:05,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:05,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:31:05,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:31:05,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2023-11-29 03:31:05,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 03:31:05,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:31:05,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2023-11-29 03:31:05,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:31:05,983 INFO L124 PetriNetUnfolderBase]: 425/845 cut-off events. [2023-11-29 03:31:05,984 INFO L125 PetriNetUnfolderBase]: For 234/303 co-relation queries the response was YES. [2023-11-29 03:31:05,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1662 conditions, 845 events. 425/845 cut-off events. For 234/303 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4274 event pairs, 181 based on Foata normal form. 71/863 useless extension candidates. Maximal degree in co-relation 731. Up to 479 conditions per place. [2023-11-29 03:31:05,990 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 29 selfloop transitions, 2 changer transitions 5/49 dead transitions. [2023-11-29 03:31:05,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 201 flow [2023-11-29 03:31:05,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:31:05,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:31:05,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2023-11-29 03:31:05,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6752136752136753 [2023-11-29 03:31:05,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 79 transitions. [2023-11-29 03:31:05,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 79 transitions. [2023-11-29 03:31:05,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:31:05,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 79 transitions. [2023-11-29 03:31:05,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 03:31:05,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 03:31:05,997 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 03:31:05,997 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 102 flow. Second operand 3 states and 79 transitions. [2023-11-29 03:31:05,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 201 flow [2023-11-29 03:31:06,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 195 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 03:31:06,001 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 108 flow [2023-11-29 03:31:06,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-11-29 03:31:06,002 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2023-11-29 03:31:06,003 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 108 flow [2023-11-29 03:31:06,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 03:31:06,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:31:06,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:06,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 03:31:06,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:31:06,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:06,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1189501591, now seen corresponding path program 1 times [2023-11-29 03:31:06,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:06,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976042047] [2023-11-29 03:31:06,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:06,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:31:06,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:06,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976042047] [2023-11-29 03:31:06,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976042047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:31:06,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:31:06,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:31:06,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108042129] [2023-11-29 03:31:06,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:31:06,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:31:06,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:06,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:31:06,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:31:06,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2023-11-29 03:31:06,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 03:31:06,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:31:06,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2023-11-29 03:31:06,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:31:06,313 INFO L124 PetriNetUnfolderBase]: 492/987 cut-off events. [2023-11-29 03:31:06,313 INFO L125 PetriNetUnfolderBase]: For 391/515 co-relation queries the response was YES. [2023-11-29 03:31:06,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2025 conditions, 987 events. 492/987 cut-off events. For 391/515 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5458 event pairs, 416 based on Foata normal form. 94/962 useless extension candidates. Maximal degree in co-relation 1249. Up to 621 conditions per place. [2023-11-29 03:31:06,320 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 24 selfloop transitions, 2 changer transitions 14/53 dead transitions. [2023-11-29 03:31:06,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 53 transitions, 222 flow [2023-11-29 03:31:06,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:31:06,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:31:06,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2023-11-29 03:31:06,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2023-11-29 03:31:06,322 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 96 transitions. [2023-11-29 03:31:06,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 96 transitions. [2023-11-29 03:31:06,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:31:06,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 96 transitions. [2023-11-29 03:31:06,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 03:31:06,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 03:31:06,326 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 03:31:06,326 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 108 flow. Second operand 4 states and 96 transitions. [2023-11-29 03:31:06,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 53 transitions, 222 flow [2023-11-29 03:31:06,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:31:06,329 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 120 flow [2023-11-29 03:31:06,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-11-29 03:31:06,330 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2023-11-29 03:31:06,330 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 120 flow [2023-11-29 03:31:06,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 03:31:06,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:31:06,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:06,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 03:31:06,332 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:31:06,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:06,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1483457053, now seen corresponding path program 1 times [2023-11-29 03:31:06,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:06,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817994178] [2023-11-29 03:31:06,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:06,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:07,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:07,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817994178] [2023-11-29 03:31:07,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817994178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:07,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115010287] [2023-11-29 03:31:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:07,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:07,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:07,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:07,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:31:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:07,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 03:31:07,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:07,522 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 23 treesize of output 1 [2023-11-29 03:31:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:08,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:09,073 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 40 treesize of output 36 [2023-11-29 03:31:09,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:31:09,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 50 treesize of output 46 [2023-11-29 03:31:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:09,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115010287] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:31:09,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:31:09,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 33 [2023-11-29 03:31:09,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506615136] [2023-11-29 03:31:09,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:09,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 03:31:09,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:09,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 03:31:09,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 03:31:09,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 39 [2023-11-29 03:31:09,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 120 flow. Second operand has 34 states, 34 states have (on average 7.588235294117647) internal successors, (258), 34 states have internal predecessors, (258), 0 states have call successors, (0), 0 states 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 03:31:09,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:31:09,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 39 [2023-11-29 03:31:09,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:31:18,878 INFO L124 PetriNetUnfolderBase]: 10115/15239 cut-off events. [2023-11-29 03:31:18,878 INFO L125 PetriNetUnfolderBase]: For 3591/3591 co-relation queries the response was YES. [2023-11-29 03:31:18,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34944 conditions, 15239 events. 10115/15239 cut-off events. For 3591/3591 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 89794 event pairs, 570 based on Foata normal form. 160/14333 useless extension candidates. Maximal degree in co-relation 34928. Up to 1862 conditions per place. [2023-11-29 03:31:18,959 INFO L140 encePairwiseOnDemand]: 20/39 looper letters, 387 selfloop transitions, 125 changer transitions 493/1007 dead transitions. [2023-11-29 03:31:18,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 1007 transitions, 4608 flow [2023-11-29 03:31:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-11-29 03:31:18,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2023-11-29 03:31:18,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 1527 transitions. [2023-11-29 03:31:18,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3728937728937729 [2023-11-29 03:31:18,972 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 1527 transitions. [2023-11-29 03:31:18,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 1527 transitions. [2023-11-29 03:31:18,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:31:18,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 1527 transitions. [2023-11-29 03:31:18,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 14.542857142857143) internal successors, (1527), 105 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states 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 03:31:18,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 39.0) internal successors, (4134), 106 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states 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 03:31:18,996 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 39.0) internal successors, (4134), 106 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states 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 03:31:18,996 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 120 flow. Second operand 105 states and 1527 transitions. [2023-11-29 03:31:18,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 1007 transitions, 4608 flow [2023-11-29 03:31:19,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 1007 transitions, 4570 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-11-29 03:31:19,028 INFO L231 Difference]: Finished difference. Result has 208 places, 185 transitions, 1186 flow [2023-11-29 03:31:19,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=1186, PETRI_PLACES=208, PETRI_TRANSITIONS=185} [2023-11-29 03:31:19,029 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2023-11-29 03:31:19,029 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 185 transitions, 1186 flow [2023-11-29 03:31:19,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 7.588235294117647) internal successors, (258), 34 states have internal predecessors, (258), 0 states have call successors, (0), 0 states 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 03:31:19,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:31:19,030 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:19,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 03:31:19,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:19,237 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:31:19,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:19,237 INFO L85 PathProgramCache]: Analyzing trace with hash -544667963, now seen corresponding path program 2 times [2023-11-29 03:31:19,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:19,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594422570] [2023-11-29 03:31:19,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:19,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:20,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:20,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594422570] [2023-11-29 03:31:20,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594422570] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:20,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979084220] [2023-11-29 03:31:20,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:31:20,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:20,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:20,711 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:20,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:31:20,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:31:20,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:31:20,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 03:31:20,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 03:31:21,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:21,391 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:31:21,392 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 28 treesize of output 20 [2023-11-29 03:31:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 03:31:21,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979084220] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:31:21,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:31:21,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2023-11-29 03:31:21,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068182128] [2023-11-29 03:31:21,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:21,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 03:31:21,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:21,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 03:31:21,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 03:31:21,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 39 [2023-11-29 03:31:21,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 185 transitions, 1186 flow. Second operand has 33 states, 33 states have (on average 7.757575757575758) internal successors, (256), 33 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 03:31:21,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:31:21,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 39 [2023-11-29 03:31:21,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:31:25,954 INFO L124 PetriNetUnfolderBase]: 5320/8212 cut-off events. [2023-11-29 03:31:25,955 INFO L125 PetriNetUnfolderBase]: For 129776/129776 co-relation queries the response was YES. [2023-11-29 03:31:25,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42746 conditions, 8212 events. 5320/8212 cut-off events. For 129776/129776 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 42670 event pairs, 133 based on Foata normal form. 116/8326 useless extension candidates. Maximal degree in co-relation 41341. Up to 1850 conditions per place. [2023-11-29 03:31:26,056 INFO L140 encePairwiseOnDemand]: 21/39 looper letters, 328 selfloop transitions, 255 changer transitions 104/689 dead transitions. [2023-11-29 03:31:26,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 689 transitions, 6175 flow [2023-11-29 03:31:26,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-29 03:31:26,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-11-29 03:31:26,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 758 transitions. [2023-11-29 03:31:26,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34098065677013045 [2023-11-29 03:31:26,061 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 758 transitions. [2023-11-29 03:31:26,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 758 transitions. [2023-11-29 03:31:26,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:31:26,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 758 transitions. [2023-11-29 03:31:26,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 13.298245614035087) internal successors, (758), 57 states have internal predecessors, (758), 0 states have call successors, (0), 0 states 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 03:31:26,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 39.0) internal successors, (2262), 58 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states 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 03:31:26,072 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 39.0) internal successors, (2262), 58 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states 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 03:31:26,072 INFO L175 Difference]: Start difference. First operand has 208 places, 185 transitions, 1186 flow. Second operand 57 states and 758 transitions. [2023-11-29 03:31:26,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 689 transitions, 6175 flow [2023-11-29 03:31:26,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 689 transitions, 4941 flow, removed 593 selfloop flow, removed 36 redundant places. [2023-11-29 03:31:26,333 INFO L231 Difference]: Finished difference. Result has 202 places, 305 transitions, 2577 flow [2023-11-29 03:31:26,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=2577, PETRI_PLACES=202, PETRI_TRANSITIONS=305} [2023-11-29 03:31:26,335 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2023-11-29 03:31:26,335 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 305 transitions, 2577 flow [2023-11-29 03:31:26,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.757575757575758) internal successors, (256), 33 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 03:31:26,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:31:26,336 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:26,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 03:31:26,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:26,543 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:31:26,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:26,543 INFO L85 PathProgramCache]: Analyzing trace with hash 315982488, now seen corresponding path program 3 times [2023-11-29 03:31:26,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:26,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179772139] [2023-11-29 03:31:26,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:26,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:31:26,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:26,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179772139] [2023-11-29 03:31:26,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179772139] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:26,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662326722] [2023-11-29 03:31:26,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:31:26,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:26,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:26,649 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:26,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 03:31:26,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 03:31:26,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:31:26,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 03:31:26,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:26,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:27,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662326722] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:31:27,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:31:27,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 13 [2023-11-29 03:31:27,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076336388] [2023-11-29 03:31:27,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:27,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:31:27,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:27,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:31:27,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:31:27,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2023-11-29 03:31:27,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 305 transitions, 2577 flow. Second operand has 14 states, 14 states have (on average 18.5) internal successors, (259), 14 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 03:31:27,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:31:27,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2023-11-29 03:31:27,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:31:28,605 INFO L124 PetriNetUnfolderBase]: 3549/6878 cut-off events. [2023-11-29 03:31:28,605 INFO L125 PetriNetUnfolderBase]: For 47970/48522 co-relation queries the response was YES. [2023-11-29 03:31:28,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31494 conditions, 6878 events. 3549/6878 cut-off events. For 47970/48522 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 47826 event pairs, 647 based on Foata normal form. 246/6716 useless extension candidates. Maximal degree in co-relation 30770. Up to 1591 conditions per place. [2023-11-29 03:31:28,668 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 226 selfloop transitions, 28 changer transitions 105/472 dead transitions. [2023-11-29 03:31:28,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 472 transitions, 4311 flow [2023-11-29 03:31:28,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 03:31:28,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 03:31:28,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2023-11-29 03:31:28,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6353276353276354 [2023-11-29 03:31:28,671 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 223 transitions. [2023-11-29 03:31:28,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 223 transitions. [2023-11-29 03:31:28,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:31:28,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 223 transitions. [2023-11-29 03:31:28,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 24.77777777777778) internal successors, (223), 9 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 03:31:28,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 39.0) internal successors, (390), 10 states have internal predecessors, (390), 0 states have call successors, (0), 0 states 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 03:31:28,673 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 39.0) internal successors, (390), 10 states have internal predecessors, (390), 0 states have call successors, (0), 0 states 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 03:31:28,673 INFO L175 Difference]: Start difference. First operand has 202 places, 305 transitions, 2577 flow. Second operand 9 states and 223 transitions. [2023-11-29 03:31:28,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 472 transitions, 4311 flow [2023-11-29 03:31:28,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 472 transitions, 3846 flow, removed 89 selfloop flow, removed 17 redundant places. [2023-11-29 03:31:28,867 INFO L231 Difference]: Finished difference. Result has 195 places, 262 transitions, 2055 flow [2023-11-29 03:31:28,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2135, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2055, PETRI_PLACES=195, PETRI_TRANSITIONS=262} [2023-11-29 03:31:28,868 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2023-11-29 03:31:28,868 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 262 transitions, 2055 flow [2023-11-29 03:31:28,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.5) internal successors, (259), 14 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 03:31:28,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:31:28,869 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:31:28,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 03:31:29,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 03:31:29,070 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:31:29,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:31:29,070 INFO L85 PathProgramCache]: Analyzing trace with hash 713601920, now seen corresponding path program 4 times [2023-11-29 03:31:29,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:31:29,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070148267] [2023-11-29 03:31:29,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:31:29,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:31:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:31:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:31:30,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:31:30,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070148267] [2023-11-29 03:31:30,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070148267] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:31:30,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148511767] [2023-11-29 03:31:30,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:31:30,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:31:30,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:31:30,792 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:31:30,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 03:31:30,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:31:30,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:31:30,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 03:31:30,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:31:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:31:31,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:31:32,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:31:32,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2023-11-29 03:31:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 03:31:32,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148511767] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:31:32,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:31:32,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 43 [2023-11-29 03:31:32,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390724119] [2023-11-29 03:31:32,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:31:32,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 03:31:32,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:31:32,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 03:31:32,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1727, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 03:31:32,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 39 [2023-11-29 03:31:32,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 262 transitions, 2055 flow. Second operand has 44 states, 44 states have (on average 7.613636363636363) internal successors, (335), 44 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 03:31:32,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:31:32,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 39 [2023-11-29 03:31:32,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:10,339 INFO L124 PetriNetUnfolderBase]: 39333/60121 cut-off events. [2023-11-29 03:32:10,340 INFO L125 PetriNetUnfolderBase]: For 421223/421223 co-relation queries the response was YES. [2023-11-29 03:32:10,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285142 conditions, 60121 events. 39333/60121 cut-off events. For 421223/421223 co-relation queries the response was YES. Maximal size of possible extension queue 1245. Compared 416669 event pairs, 2536 based on Foata normal form. 902/61023 useless extension candidates. Maximal degree in co-relation 282845. Up to 6897 conditions per place. [2023-11-29 03:32:10,803 INFO L140 encePairwiseOnDemand]: 18/39 looper letters, 1490 selfloop transitions, 1091 changer transitions 917/3500 dead transitions. [2023-11-29 03:32:10,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 3500 transitions, 30853 flow [2023-11-29 03:32:10,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 314 states. [2023-11-29 03:32:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2023-11-29 03:32:10,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 4062 transitions. [2023-11-29 03:32:10,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3317001469867712 [2023-11-29 03:32:10,821 INFO L72 ComplementDD]: Start complementDD. Operand 314 states and 4062 transitions. [2023-11-29 03:32:10,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 314 states and 4062 transitions. [2023-11-29 03:32:10,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:10,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 314 states and 4062 transitions. [2023-11-29 03:32:10,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 315 states, 314 states have (on average 12.936305732484076) internal successors, (4062), 314 states have internal predecessors, (4062), 0 states have call successors, (0), 0 states 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 03:32:10,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 315 states, 315 states have (on average 39.0) internal successors, (12285), 315 states have internal predecessors, (12285), 0 states have call successors, (0), 0 states 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 03:32:10,868 INFO L81 ComplementDD]: Finished complementDD. Result has 315 states, 315 states have (on average 39.0) internal successors, (12285), 315 states have internal predecessors, (12285), 0 states have call successors, (0), 0 states 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 03:32:10,868 INFO L175 Difference]: Start difference. First operand has 195 places, 262 transitions, 2055 flow. Second operand 314 states and 4062 transitions. [2023-11-29 03:32:10,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 3500 transitions, 30853 flow [2023-11-29 03:32:13,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 3500 transitions, 29269 flow, removed 790 selfloop flow, removed 7 redundant places. [2023-11-29 03:32:13,478 INFO L231 Difference]: Finished difference. Result has 574 places, 1168 transitions, 12687 flow [2023-11-29 03:32:13,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2005, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=314, PETRI_FLOW=12687, PETRI_PLACES=574, PETRI_TRANSITIONS=1168} [2023-11-29 03:32:13,479 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 533 predicate places. [2023-11-29 03:32:13,479 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 1168 transitions, 12687 flow [2023-11-29 03:32:13,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 7.613636363636363) internal successors, (335), 44 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 03:32:13,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:13,480 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:13,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 03:32:13,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 03:32:13,680 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:32:13,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:13,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1734477642, now seen corresponding path program 5 times [2023-11-29 03:32:13,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:13,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579105036] [2023-11-29 03:32:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:13,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:14,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:14,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579105036] [2023-11-29 03:32:14,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579105036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:32:14,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775151404] [2023-11-29 03:32:14,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:32:14,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:32:14,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:32:14,858 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:32:14,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 03:32:14,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 03:32:14,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:32:14,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 03:32:14,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:32:15,047 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 23 treesize of output 1 [2023-11-29 03:32:16,240 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-11-29 03:32:16,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 19 [2023-11-29 03:32:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:16,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:32:18,126 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 76 treesize of output 68 [2023-11-29 03:32:18,178 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-29 03:32:18,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 131 [2023-11-29 03:32:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:19,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775151404] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:32:19,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:32:19,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 48 [2023-11-29 03:32:19,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732325898] [2023-11-29 03:32:19,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:32:19,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 03:32:19,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:19,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 03:32:19,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=2070, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 03:32:19,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2023-11-29 03:32:19,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 1168 transitions, 12687 flow. Second operand has 49 states, 49 states have (on average 10.142857142857142) internal successors, (497), 49 states have internal predecessors, (497), 0 states have call successors, (0), 0 states 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 03:32:19,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:19,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2023-11-29 03:32:19,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:45,628 INFO L124 PetriNetUnfolderBase]: 24527/41440 cut-off events. [2023-11-29 03:32:45,628 INFO L125 PetriNetUnfolderBase]: For 1246730/1247650 co-relation queries the response was YES. [2023-11-29 03:32:46,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300380 conditions, 41440 events. 24527/41440 cut-off events. For 1246730/1247650 co-relation queries the response was YES. Maximal size of possible extension queue 1243. Compared 326046 event pairs, 4089 based on Foata normal form. 364/41072 useless extension candidates. Maximal degree in co-relation 300008. Up to 19814 conditions per place. [2023-11-29 03:32:46,455 INFO L140 encePairwiseOnDemand]: 22/39 looper letters, 1137 selfloop transitions, 662 changer transitions 127/2040 dead transitions. [2023-11-29 03:32:46,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 2040 transitions, 26494 flow [2023-11-29 03:32:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-29 03:32:46,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-11-29 03:32:46,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 1114 transitions. [2023-11-29 03:32:46,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263298890164562 [2023-11-29 03:32:46,459 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 1114 transitions. [2023-11-29 03:32:46,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 1114 transitions. [2023-11-29 03:32:46,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:46,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 1114 transitions. [2023-11-29 03:32:46,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 16.62686567164179) internal successors, (1114), 67 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states 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 03:32:46,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 39.0) internal successors, (2652), 68 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states 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 03:32:46,468 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 39.0) internal successors, (2652), 68 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states 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 03:32:46,468 INFO L175 Difference]: Start difference. First operand has 574 places, 1168 transitions, 12687 flow. Second operand 67 states and 1114 transitions. [2023-11-29 03:32:46,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 2040 transitions, 26494 flow [2023-11-29 03:33:01,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 2040 transitions, 24048 flow, removed 932 selfloop flow, removed 34 redundant places. [2023-11-29 03:33:01,519 INFO L231 Difference]: Finished difference. Result has 575 places, 1415 transitions, 16176 flow [2023-11-29 03:33:01,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=11176, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=447, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=16176, PETRI_PLACES=575, PETRI_TRANSITIONS=1415} [2023-11-29 03:33:01,521 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 534 predicate places. [2023-11-29 03:33:01,521 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 1415 transitions, 16176 flow [2023-11-29 03:33:01,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 10.142857142857142) internal successors, (497), 49 states have internal predecessors, (497), 0 states have call successors, (0), 0 states 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 03:33:01,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:33:01,521 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:33:01,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 03:33:01,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:33:01,722 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:33:01,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:33:01,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1032113262, now seen corresponding path program 6 times [2023-11-29 03:33:01,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:33:01,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172014976] [2023-11-29 03:33:01,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:33:01,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:33:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:33:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:33:02,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:33:02,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172014976] [2023-11-29 03:33:02,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172014976] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:33:02,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537420706] [2023-11-29 03:33:02,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:33:02,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:33:02,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:33:02,946 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:33:02,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 03:33:03,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 03:33:03,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:33:03,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 03:33:03,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:33:04,306 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-11-29 03:33:04,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 19 [2023-11-29 03:33:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:33:04,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:33:05,307 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-11-29 03:33:05,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 45 [2023-11-29 03:33:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:33:06,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537420706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:33:06,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:33:06,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 44 [2023-11-29 03:33:06,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841825766] [2023-11-29 03:33:06,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:33:06,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 03:33:06,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:33:06,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 03:33:06,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 03:33:06,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2023-11-29 03:33:06,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 1415 transitions, 16176 flow. Second operand has 45 states, 45 states have (on average 10.333333333333334) internal successors, (465), 45 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:33:06,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:33:06,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2023-11-29 03:33:06,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:34:22,299 INFO L124 PetriNetUnfolderBase]: 66882/111524 cut-off events. [2023-11-29 03:34:22,299 INFO L125 PetriNetUnfolderBase]: For 4079640/4081810 co-relation queries the response was YES. [2023-11-29 03:34:24,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 850888 conditions, 111524 events. 66882/111524 cut-off events. For 4079640/4081810 co-relation queries the response was YES. Maximal size of possible extension queue 2463. Compared 973358 event pairs, 4989 based on Foata normal form. 1436/111842 useless extension candidates. Maximal degree in co-relation 850517. Up to 19362 conditions per place. [2023-11-29 03:34:24,734 INFO L140 encePairwiseOnDemand]: 21/39 looper letters, 1701 selfloop transitions, 2396 changer transitions 824/5030 dead transitions. [2023-11-29 03:34:24,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 5030 transitions, 69809 flow [2023-11-29 03:34:24,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2023-11-29 03:34:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2023-11-29 03:34:24,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 3223 transitions. [2023-11-29 03:34:24,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216378859236002 [2023-11-29 03:34:24,741 INFO L72 ComplementDD]: Start complementDD. Operand 196 states and 3223 transitions. [2023-11-29 03:34:24,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 196 states and 3223 transitions. [2023-11-29 03:34:24,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:34:24,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 196 states and 3223 transitions. [2023-11-29 03:34:24,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 197 states, 196 states have (on average 16.443877551020407) internal successors, (3223), 196 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states 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 03:34:24,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 197 states, 197 states have (on average 39.0) internal successors, (7683), 197 states have internal predecessors, (7683), 0 states have call successors, (0), 0 states 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 03:34:24,762 INFO L81 ComplementDD]: Finished complementDD. Result has 197 states, 197 states have (on average 39.0) internal successors, (7683), 197 states have internal predecessors, (7683), 0 states have call successors, (0), 0 states 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 03:34:24,762 INFO L175 Difference]: Start difference. First operand has 575 places, 1415 transitions, 16176 flow. Second operand 196 states and 3223 transitions. [2023-11-29 03:34:24,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 748 places, 5030 transitions, 69809 flow [2023-11-29 03:35:29,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 702 places, 5030 transitions, 63387 flow, removed 1027 selfloop flow, removed 46 redundant places. [2023-11-29 03:35:29,693 INFO L231 Difference]: Finished difference. Result has 785 places, 3093 transitions, 42853 flow [2023-11-29 03:35:29,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=13272, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=784, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=196, PETRI_FLOW=42853, PETRI_PLACES=785, PETRI_TRANSITIONS=3093} [2023-11-29 03:35:29,695 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 744 predicate places. [2023-11-29 03:35:29,696 INFO L495 AbstractCegarLoop]: Abstraction has has 785 places, 3093 transitions, 42853 flow [2023-11-29 03:35:29,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 10.333333333333334) internal successors, (465), 45 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:35:29,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:35:29,696 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:35:29,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 03:35:29,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:35:29,897 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:35:29,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:35:29,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1148072564, now seen corresponding path program 7 times [2023-11-29 03:35:29,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:35:29,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834514282] [2023-11-29 03:35:29,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:35:29,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:35:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:35:31,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:35:31,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834514282] [2023-11-29 03:35:31,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834514282] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:35:31,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110988041] [2023-11-29 03:35:31,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:35:31,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:35:31,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:35:31,496 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:35:31,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 03:35:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:35:31,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 03:35:31,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:35:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:35:32,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:35:32,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:35:32,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2023-11-29 03:35:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 03:35:32,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110988041] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:35:32,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:35:32,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 15] total 45 [2023-11-29 03:35:32,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363340227] [2023-11-29 03:35:32,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:35:32,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-29 03:35:32,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:35:32,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-29 03:35:32,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1890, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 03:35:33,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 39 [2023-11-29 03:35:33,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 785 places, 3093 transitions, 42853 flow. Second operand has 46 states, 46 states have (on average 7.565217391304348) internal successors, (348), 46 states have internal predecessors, (348), 0 states have call successors, (0), 0 states 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 03:35:33,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:35:33,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 39 [2023-11-29 03:35:33,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:38:05,571 INFO L124 PetriNetUnfolderBase]: 105386/164476 cut-off events. [2023-11-29 03:38:05,571 INFO L125 PetriNetUnfolderBase]: For 9628160/9628160 co-relation queries the response was YES. [2023-11-29 03:38:09,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1412780 conditions, 164476 events. 105386/164476 cut-off events. For 9628160/9628160 co-relation queries the response was YES. Maximal size of possible extension queue 3261. Compared 1336078 event pairs, 17330 based on Foata normal form. 140/164616 useless extension candidates. Maximal degree in co-relation 1412344. Up to 62785 conditions per place. [2023-11-29 03:38:10,382 INFO L140 encePairwiseOnDemand]: 20/39 looper letters, 2031 selfloop transitions, 3421 changer transitions 308/5762 dead transitions. [2023-11-29 03:38:10,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 905 places, 5762 transitions, 92684 flow [2023-11-29 03:38:10,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-11-29 03:38:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2023-11-29 03:38:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 1616 transitions. [2023-11-29 03:38:10,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3396385035729298 [2023-11-29 03:38:10,386 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 1616 transitions. [2023-11-29 03:38:10,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 1616 transitions. [2023-11-29 03:38:10,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:38:10,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 1616 transitions. [2023-11-29 03:38:10,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 13.245901639344263) internal successors, (1616), 122 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states 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 03:38:10,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 39.0) internal successors, (4797), 123 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states 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 03:38:10,396 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 39.0) internal successors, (4797), 123 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states 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 03:38:10,396 INFO L175 Difference]: Start difference. First operand has 785 places, 3093 transitions, 42853 flow. Second operand 122 states and 1616 transitions. [2023-11-29 03:38:10,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 905 places, 5762 transitions, 92684 flow [2023-11-29 03:42:17,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 860 places, 5762 transitions, 83452 flow, removed 3835 selfloop flow, removed 45 redundant places. [2023-11-29 03:42:17,747 INFO L231 Difference]: Finished difference. Result has 889 places, 4454 transitions, 67444 flow [2023-11-29 03:42:17,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=38178, PETRI_DIFFERENCE_MINUEND_PLACES=739, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3093, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=809, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=67444, PETRI_PLACES=889, PETRI_TRANSITIONS=4454} [2023-11-29 03:42:17,751 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 848 predicate places. [2023-11-29 03:42:17,751 INFO L495 AbstractCegarLoop]: Abstraction has has 889 places, 4454 transitions, 67444 flow [2023-11-29 03:42:17,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 7.565217391304348) internal successors, (348), 46 states have internal predecessors, (348), 0 states have call successors, (0), 0 states 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 03:42:17,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:42:17,752 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:42:17,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 03:42:17,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 03:42:17,952 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:42:17,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:42:17,953 INFO L85 PathProgramCache]: Analyzing trace with hash -167356736, now seen corresponding path program 8 times [2023-11-29 03:42:17,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:42:17,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418941213] [2023-11-29 03:42:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:42:17,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:42:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:42:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:42:19,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:42:19,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418941213] [2023-11-29 03:42:19,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418941213] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:42:19,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738895042] [2023-11-29 03:42:19,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:42:19,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:42:19,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:42:19,564 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:42:19,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f9d07e6-1a68-463e-92a0-e2eb93265b84/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 03:42:19,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:42:19,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:42:19,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 03:42:19,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:42:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:42:20,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:42:20,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:42:20,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2023-11-29 03:42:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 03:42:20,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738895042] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:42:20,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:42:20,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 13] total 40 [2023-11-29 03:42:20,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125089950] [2023-11-29 03:42:20,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:42:20,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 03:42:20,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:42:20,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 03:42:20,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1493, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 03:42:21,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2023-11-29 03:42:21,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 889 places, 4454 transitions, 67444 flow. Second operand has 41 states, 41 states have (on average 10.365853658536585) internal successors, (425), 41 states have internal predecessors, (425), 0 states have call successors, (0), 0 states 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 03:42:21,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:42:21,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2023-11-29 03:42:21,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand