./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/bigshot_s.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/bigshot_s.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ --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 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:39:07,323 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:39:07,396 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:39:07,402 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:39:07,403 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:39:07,458 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:39:07,459 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:39:07,460 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:39:07,461 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:39:07,462 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:39:07,462 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:39:07,463 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:39:07,464 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:39:07,465 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:39:07,466 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:39:07,466 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:39:07,467 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:39:07,468 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:39:07,468 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:39:07,469 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:39:07,470 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:39:07,471 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:39:07,471 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:39:07,472 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:39:07,473 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:39:07,473 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:39:07,474 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:39:07,475 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:39:07,475 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:39:07,476 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:39:07,477 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:39:07,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:39:07,478 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:39:07,500 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:39:07,501 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:39:07,501 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:39:07,502 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:39:07,502 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:39:07,503 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:39:07,503 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:39:07,503 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:39:07,505 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:39:07,505 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_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe [2023-11-23 22:39:07,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:39:07,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:39:07,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:39:07,835 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:39:07,836 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:39:07,837 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/pthread/bigshot_s.i [2023-11-23 22:39:10,901 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:39:11,339 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:39:11,340 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/sv-benchmarks/c/pthread/bigshot_s.i [2023-11-23 22:39:11,367 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/data/bc1a289c8/7b80e064f8224746891ccce17c6cefd0/FLAG718814efa [2023-11-23 22:39:11,381 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/data/bc1a289c8/7b80e064f8224746891ccce17c6cefd0 [2023-11-23 22:39:11,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:39:11,385 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:39:11,387 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:39:11,387 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:39:11,401 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:39:11,402 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:39:11" (1/1) ... [2023-11-23 22:39:11,403 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b76868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:11, skipping insertion in model container [2023-11-23 22:39:11,403 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:39:11" (1/1) ... [2023-11-23 22:39:11,463 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:39:12,083 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_656ec19e-d524-4761-a44f-198dec1cbeeb/sv-benchmarks/c/pthread/bigshot_s.i[55202,55215] [2023-11-23 22:39:12,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:39:12,125 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:39:12,206 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_656ec19e-d524-4761-a44f-198dec1cbeeb/sv-benchmarks/c/pthread/bigshot_s.i[55202,55215] [2023-11-23 22:39:12,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:39:12,324 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:39:12,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:12 WrapperNode [2023-11-23 22:39:12,325 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:39:12,327 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:39:12,328 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:39:12,328 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:39:12,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:12" (1/1) ... [2023-11-23 22:39:12,363 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:12" (1/1) ... [2023-11-23 22:39:12,403 INFO L138 Inliner]: procedures = 323, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-11-23 22:39:12,403 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:39:12,404 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:39:12,405 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:39:12,405 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:39:12,419 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:12" (1/1) ... [2023-11-23 22:39:12,419 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:12" (1/1) ... [2023-11-23 22:39:12,437 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:12" (1/1) ... [2023-11-23 22:39:12,468 INFO L189 HeapSplitter]: Split 17 memory accesses to 5 slices as follows [2, 9, 2, 2, 2] [2023-11-23 22:39:12,468 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:12" (1/1) ... [2023-11-23 22:39:12,469 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:12" (1/1) ... [2023-11-23 22:39:12,477 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:12" (1/1) ... [2023-11-23 22:39:12,494 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:12" (1/1) ... [2023-11-23 22:39:12,496 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:12" (1/1) ... [2023-11-23 22:39:12,498 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:12" (1/1) ... [2023-11-23 22:39:12,503 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:39:12,504 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:39:12,504 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:39:12,504 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:39:12,505 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:12" (1/1) ... [2023-11-23 22:39:12,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:39:12,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:12,557 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:39:12,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:39:12,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:39:12,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:39:12,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2023-11-23 22:39:12,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2023-11-23 22:39:12,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2023-11-23 22:39:12,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2023-11-23 22:39:12,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#4 [2023-11-23 22:39:12,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:39:12,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:39:12,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:39:12,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:39:12,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 22:39:12,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 22:39:12,612 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 22:39:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 22:39:12,612 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 22:39:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:39:12,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:39:12,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:39:12,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:39:12,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 22:39:12,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 22:39:12,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:39:12,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:39:12,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:39:12,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:39:12,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:39:12,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 22:39:12,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:39:12,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:39:12,619 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:39:12,869 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:39:12,872 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:39:13,076 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:39:13,363 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:39:13,364 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 22:39:13,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:39:13 BoogieIcfgContainer [2023-11-23 22:39:13,365 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:39:13,368 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:39:13,368 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:39:13,372 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:39:13,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:39:11" (1/3) ... [2023-11-23 22:39:13,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e612e5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:39:13, skipping insertion in model container [2023-11-23 22:39:13,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:12" (2/3) ... [2023-11-23 22:39:13,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e612e5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:39:13, skipping insertion in model container [2023-11-23 22:39:13,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:39:13" (3/3) ... [2023-11-23 22:39:13,375 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2023-11-23 22:39:13,385 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:39:13,396 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:39:13,397 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:39:13,397 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:39:13,443 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-23 22:39:13,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 26 transitions, 66 flow [2023-11-23 22:39:13,515 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2023-11-23 22:39:13,516 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-23 22:39:13,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 4/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2023-11-23 22:39:13,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 26 transitions, 66 flow [2023-11-23 22:39:13,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 21 transitions, 54 flow [2023-11-23 22:39:13,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:39:13,542 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;@7e486c75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:39:13,542 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-23 22:39:13,554 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:39:13,554 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2023-11-23 22:39:13,554 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-23 22:39:13,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:13,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:13,556 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:39:13,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:13,562 INFO L85 PathProgramCache]: Analyzing trace with hash -429383128, now seen corresponding path program 1 times [2023-11-23 22:39:13,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:13,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318160581] [2023-11-23 22:39:13,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:13,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:13,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:13,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318160581] [2023-11-23 22:39:13,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318160581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:39:13,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:39:13,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:39:13,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553121736] [2023-11-23 22:39:13,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:39:14,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:39:14,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:14,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:39:14,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:39:14,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2023-11-23 22:39:14,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:14,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:14,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2023-11-23 22:39:14,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:14,151 INFO L124 PetriNetUnfolderBase]: 7/31 cut-off events. [2023-11-23 22:39:14,151 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-23 22:39:14,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 31 events. 7/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 4 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 46. Up to 23 conditions per place. [2023-11-23 22:39:14,153 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 15 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-11-23 22:39:14,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 20 transitions, 84 flow [2023-11-23 22:39:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:39:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:39:14,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2023-11-23 22:39:14,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-23 22:39:14,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 39 transitions. [2023-11-23 22:39:14,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 39 transitions. [2023-11-23 22:39:14,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:14,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 39 transitions. [2023-11-23 22:39:14,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:14,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:14,178 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:14,180 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 54 flow. Second operand 3 states and 39 transitions. [2023-11-23 22:39:14,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 20 transitions, 84 flow [2023-11-23 22:39:14,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 20 transitions, 76 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-23 22:39:14,188 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-11-23 22:39:14,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-11-23 22:39:14,194 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -2 predicate places. [2023-11-23 22:39:14,194 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-11-23 22:39:14,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:14,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:14,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:14,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:39:14,196 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:39:14,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:14,197 INFO L85 PathProgramCache]: Analyzing trace with hash 819552262, now seen corresponding path program 1 times [2023-11-23 22:39:14,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:14,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116659571] [2023-11-23 22:39:14,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:14,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:14,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:14,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116659571] [2023-11-23 22:39:14,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116659571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:39:14,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:39:14,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:39:14,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365030999] [2023-11-23 22:39:14,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:39:14,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:39:14,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:14,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:39:14,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:39:14,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2023-11-23 22:39:14,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:14,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:14,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2023-11-23 22:39:14,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:14,767 INFO L124 PetriNetUnfolderBase]: 11/41 cut-off events. [2023-11-23 22:39:14,767 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-23 22:39:14,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 41 events. 11/41 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs, 6 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 70. Up to 29 conditions per place. [2023-11-23 22:39:14,769 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 17 selfloop transitions, 5 changer transitions 0/25 dead transitions. [2023-11-23 22:39:14,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 25 transitions, 100 flow [2023-11-23 22:39:14,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:39:14,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:39:14,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 65 transitions. [2023-11-23 22:39:14,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-23 22:39:14,774 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 65 transitions. [2023-11-23 22:39:14,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 65 transitions. [2023-11-23 22:39:14,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:14,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 65 transitions. [2023-11-23 22:39:14,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:14,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:14,777 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:14,777 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 6 states and 65 transitions. [2023-11-23 22:39:14,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 25 transitions, 100 flow [2023-11-23 22:39:14,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 25 transitions, 99 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:39:14,779 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 67 flow [2023-11-23 22:39:14,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=67, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-11-23 22:39:14,781 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-11-23 22:39:14,781 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 67 flow [2023-11-23 22:39:14,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:14,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:14,781 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:14,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:39:14,782 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:39:14,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:14,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1669258695, now seen corresponding path program 1 times [2023-11-23 22:39:14,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:14,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664781793] [2023-11-23 22:39:14,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:14,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:15,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:15,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664781793] [2023-11-23 22:39:15,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664781793] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:15,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694061138] [2023-11-23 22:39:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:15,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:15,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:15,233 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:39:15,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:39:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:15,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 22:39:15,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:15,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 22:39:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:15,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:15,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694061138] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:39:15,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:39:15,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-23 22:39:15,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759769509] [2023-11-23 22:39:15,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:39:15,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 22:39:15,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:15,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 22:39:15,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-23 22:39:15,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2023-11-23 22:39:15,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 67 flow. Second operand has 14 states, 14 states have (on average 10.071428571428571) internal successors, (141), 14 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:15,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:15,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2023-11-23 22:39:15,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:15,943 INFO L124 PetriNetUnfolderBase]: 13/47 cut-off events. [2023-11-23 22:39:15,944 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:39:15,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 47 events. 13/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 6 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 102. Up to 29 conditions per place. [2023-11-23 22:39:15,945 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 19 selfloop transitions, 6 changer transitions 0/28 dead transitions. [2023-11-23 22:39:15,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 133 flow [2023-11-23 22:39:15,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:39:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:39:15,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2023-11-23 22:39:15,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41208791208791207 [2023-11-23 22:39:15,948 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 75 transitions. [2023-11-23 22:39:15,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 75 transitions. [2023-11-23 22:39:15,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:15,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 75 transitions. [2023-11-23 22:39:15,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:15,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:15,951 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:15,951 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 67 flow. Second operand 7 states and 75 transitions. [2023-11-23 22:39:15,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 133 flow [2023-11-23 22:39:15,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 132 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:39:15,954 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 96 flow [2023-11-23 22:39:15,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=96, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2023-11-23 22:39:15,955 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2023-11-23 22:39:15,956 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 96 flow [2023-11-23 22:39:15,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.071428571428571) internal successors, (141), 14 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:15,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:15,956 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:15,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:39:16,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:16,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:39:16,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:16,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1128419484, now seen corresponding path program 2 times [2023-11-23 22:39:16,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:16,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555297842] [2023-11-23 22:39:16,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:16,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:16,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:16,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555297842] [2023-11-23 22:39:16,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555297842] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:16,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002049422] [2023-11-23 22:39:16,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:39:16,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:16,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:16,546 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:39:16,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:39:16,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:39:16,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:39:16,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 22:39:16,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:16,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 22:39:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:16,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:16,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002049422] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:39:16,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:39:16,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-23 22:39:16,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126260917] [2023-11-23 22:39:16,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:39:16,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 22:39:16,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:16,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 22:39:16,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-11-23 22:39:16,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2023-11-23 22:39:16,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 96 flow. Second operand has 17 states, 17 states have (on average 9.882352941176471) internal successors, (168), 17 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:16,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:16,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2023-11-23 22:39:16,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:17,250 INFO L124 PetriNetUnfolderBase]: 15/53 cut-off events. [2023-11-23 22:39:17,250 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-23 22:39:17,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 53 events. 15/53 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 48 event pairs, 6 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 142. Up to 29 conditions per place. [2023-11-23 22:39:17,253 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 21 selfloop transitions, 7 changer transitions 0/31 dead transitions. [2023-11-23 22:39:17,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 31 transitions, 174 flow [2023-11-23 22:39:17,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:39:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-23 22:39:17,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2023-11-23 22:39:17,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40865384615384615 [2023-11-23 22:39:17,263 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 85 transitions. [2023-11-23 22:39:17,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 85 transitions. [2023-11-23 22:39:17,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:17,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 85 transitions. [2023-11-23 22:39:17,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:17,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 26.0) internal successors, (234), 9 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:17,269 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 26.0) internal successors, (234), 9 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:17,269 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 96 flow. Second operand 8 states and 85 transitions. [2023-11-23 22:39:17,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 31 transitions, 174 flow [2023-11-23 22:39:17,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 31 transitions, 162 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-23 22:39:17,275 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 120 flow [2023-11-23 22:39:17,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=120, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2023-11-23 22:39:17,277 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2023-11-23 22:39:17,277 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 120 flow [2023-11-23 22:39:17,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.882352941176471) internal successors, (168), 17 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:17,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:17,278 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:17,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:39:17,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:17,492 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:39:17,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:17,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1047622207, now seen corresponding path program 3 times [2023-11-23 22:39:17,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:17,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449571910] [2023-11-23 22:39:17,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:17,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:17,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:17,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449571910] [2023-11-23 22:39:17,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449571910] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:17,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424671656] [2023-11-23 22:39:17,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:39:17,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:17,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:17,814 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:39:17,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:39:17,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-23 22:39:17,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:39:17,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 22:39:17,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:18,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 22:39:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:18,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:18,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424671656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:39:18,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:39:18,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-23 22:39:18,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843906143] [2023-11-23 22:39:18,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:39:18,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 22:39:18,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:18,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 22:39:18,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-11-23 22:39:18,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2023-11-23 22:39:18,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 120 flow. Second operand has 20 states, 20 states have (on average 9.75) internal successors, (195), 20 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) [2023-11-23 22:39:18,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:18,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2023-11-23 22:39:18,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:18,591 INFO L124 PetriNetUnfolderBase]: 17/59 cut-off events. [2023-11-23 22:39:18,591 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-11-23 22:39:18,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 59 events. 17/59 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 52 event pairs, 6 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 178. Up to 29 conditions per place. [2023-11-23 22:39:18,592 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 23 selfloop transitions, 8 changer transitions 0/34 dead transitions. [2023-11-23 22:39:18,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 34 transitions, 210 flow [2023-11-23 22:39:18,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:39:18,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-23 22:39:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2023-11-23 22:39:18,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405982905982906 [2023-11-23 22:39:18,596 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 95 transitions. [2023-11-23 22:39:18,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 95 transitions. [2023-11-23 22:39:18,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:18,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 95 transitions. [2023-11-23 22:39:18,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:18,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 26.0) internal successors, (260), 10 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:18,600 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 26.0) internal successors, (260), 10 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:18,600 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 120 flow. Second operand 9 states and 95 transitions. [2023-11-23 22:39:18,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 34 transitions, 210 flow [2023-11-23 22:39:18,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 34 transitions, 192 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-23 22:39:18,606 INFO L231 Difference]: Finished difference. Result has 45 places, 28 transitions, 144 flow [2023-11-23 22:39:18,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=144, PETRI_PLACES=45, PETRI_TRANSITIONS=28} [2023-11-23 22:39:18,608 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 20 predicate places. [2023-11-23 22:39:18,609 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 144 flow [2023-11-23 22:39:18,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.75) internal successors, (195), 20 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) [2023-11-23 22:39:18,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:18,609 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:18,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:39:18,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:18,825 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:39:18,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:18,825 INFO L85 PathProgramCache]: Analyzing trace with hash -710850338, now seen corresponding path program 4 times [2023-11-23 22:39:18,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:18,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36445725] [2023-11-23 22:39:18,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:18,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:19,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:19,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36445725] [2023-11-23 22:39:19,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36445725] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:19,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018860650] [2023-11-23 22:39:19,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 22:39:19,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:19,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:19,208 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:39:19,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:39:19,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 22:39:19,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:39:19,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 22:39:19,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:19,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 22:39:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:19,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:19,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018860650] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:39:19,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:39:19,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-23 22:39:19,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680495822] [2023-11-23 22:39:19,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:39:19,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-23 22:39:19,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:19,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-23 22:39:19,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-11-23 22:39:19,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2023-11-23 22:39:19,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 28 transitions, 144 flow. Second operand has 23 states, 23 states have (on average 9.652173913043478) internal successors, (222), 23 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:19,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:19,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2023-11-23 22:39:19,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:20,181 INFO L124 PetriNetUnfolderBase]: 19/65 cut-off events. [2023-11-23 22:39:20,181 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-11-23 22:39:20,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 65 events. 19/65 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 6 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 214. Up to 29 conditions per place. [2023-11-23 22:39:20,183 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 25 selfloop transitions, 9 changer transitions 0/37 dead transitions. [2023-11-23 22:39:20,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 37 transitions, 246 flow [2023-11-23 22:39:20,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:39:20,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-23 22:39:20,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2023-11-23 22:39:20,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2023-11-23 22:39:20,185 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 105 transitions. [2023-11-23 22:39:20,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 105 transitions. [2023-11-23 22:39:20,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:20,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 105 transitions. [2023-11-23 22:39:20,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:20,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 26.0) internal successors, (286), 11 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:20,188 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 26.0) internal successors, (286), 11 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:20,188 INFO L175 Difference]: Start difference. First operand has 45 places, 28 transitions, 144 flow. Second operand 10 states and 105 transitions. [2023-11-23 22:39:20,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 37 transitions, 246 flow [2023-11-23 22:39:20,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 37 transitions, 222 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-11-23 22:39:20,193 INFO L231 Difference]: Finished difference. Result has 50 places, 30 transitions, 168 flow [2023-11-23 22:39:20,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=30} [2023-11-23 22:39:20,194 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 25 predicate places. [2023-11-23 22:39:20,194 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 30 transitions, 168 flow [2023-11-23 22:39:20,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.652173913043478) internal successors, (222), 23 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:20,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:20,195 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:20,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:39:20,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:20,417 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:39:20,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:20,417 INFO L85 PathProgramCache]: Analyzing trace with hash 804368571, now seen corresponding path program 5 times [2023-11-23 22:39:20,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:20,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867465292] [2023-11-23 22:39:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:20,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:20,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:20,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867465292] [2023-11-23 22:39:20,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867465292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:20,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357342584] [2023-11-23 22:39:20,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 22:39:20,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:20,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:20,899 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:39:20,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:39:21,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-23 22:39:21,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:39:21,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 22:39:21,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:21,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 22:39:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:21,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:21,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357342584] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:39:21,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:39:21,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-23 22:39:21,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437524346] [2023-11-23 22:39:21,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:39:21,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-23 22:39:21,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:21,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-23 22:39:21,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2023-11-23 22:39:21,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2023-11-23 22:39:21,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 30 transitions, 168 flow. Second operand has 26 states, 26 states have (on average 9.576923076923077) internal successors, (249), 26 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:21,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:21,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2023-11-23 22:39:21,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:22,143 INFO L124 PetriNetUnfolderBase]: 21/71 cut-off events. [2023-11-23 22:39:22,144 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-11-23 22:39:22,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 71 events. 21/71 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 6 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 250. Up to 29 conditions per place. [2023-11-23 22:39:22,146 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 27 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2023-11-23 22:39:22,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 40 transitions, 282 flow [2023-11-23 22:39:22,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:39:22,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-23 22:39:22,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2023-11-23 22:39:22,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4020979020979021 [2023-11-23 22:39:22,149 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 115 transitions. [2023-11-23 22:39:22,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 115 transitions. [2023-11-23 22:39:22,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:22,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 115 transitions. [2023-11-23 22:39:22,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:22,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 26.0) internal successors, (312), 12 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:22,152 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 26.0) internal successors, (312), 12 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:22,152 INFO L175 Difference]: Start difference. First operand has 50 places, 30 transitions, 168 flow. Second operand 11 states and 115 transitions. [2023-11-23 22:39:22,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 40 transitions, 282 flow [2023-11-23 22:39:22,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 40 transitions, 252 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-11-23 22:39:22,157 INFO L231 Difference]: Finished difference. Result has 55 places, 32 transitions, 192 flow [2023-11-23 22:39:22,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=192, PETRI_PLACES=55, PETRI_TRANSITIONS=32} [2023-11-23 22:39:22,158 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 30 predicate places. [2023-11-23 22:39:22,158 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 32 transitions, 192 flow [2023-11-23 22:39:22,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.576923076923077) internal successors, (249), 26 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:22,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:22,159 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:22,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:39:22,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:22,373 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:39:22,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:22,373 INFO L85 PathProgramCache]: Analyzing trace with hash 935826776, now seen corresponding path program 6 times [2023-11-23 22:39:22,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:22,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985824351] [2023-11-23 22:39:22,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:22,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:22,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:22,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985824351] [2023-11-23 22:39:22,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985824351] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:22,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929413263] [2023-11-23 22:39:22,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 22:39:22,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:22,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:22,877 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:39:22,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:39:23,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-23 22:39:23,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:39:23,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 22:39:23,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:23,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 22:39:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:23,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:39:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:23,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929413263] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:39:23,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:39:23,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-11-23 22:39:23,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965448980] [2023-11-23 22:39:23,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:39:23,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-23 22:39:23,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:23,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-23 22:39:23,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2023-11-23 22:39:23,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2023-11-23 22:39:23,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 32 transitions, 192 flow. Second operand has 29 states, 29 states have (on average 9.517241379310345) internal successors, (276), 29 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:23,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:23,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2023-11-23 22:39:23,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:24,342 INFO L124 PetriNetUnfolderBase]: 23/77 cut-off events. [2023-11-23 22:39:24,343 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-11-23 22:39:24,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 77 events. 23/77 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 6 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 286. Up to 29 conditions per place. [2023-11-23 22:39:24,348 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 29 selfloop transitions, 11 changer transitions 0/43 dead transitions. [2023-11-23 22:39:24,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 43 transitions, 318 flow [2023-11-23 22:39:24,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 22:39:24,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-23 22:39:24,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2023-11-23 22:39:24,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40064102564102566 [2023-11-23 22:39:24,351 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 125 transitions. [2023-11-23 22:39:24,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 125 transitions. [2023-11-23 22:39:24,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:24,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 125 transitions. [2023-11-23 22:39:24,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:24,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 26.0) internal successors, (338), 13 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:24,354 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 26.0) internal successors, (338), 13 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:24,354 INFO L175 Difference]: Start difference. First operand has 55 places, 32 transitions, 192 flow. Second operand 12 states and 125 transitions. [2023-11-23 22:39:24,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 43 transitions, 318 flow [2023-11-23 22:39:24,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 43 transitions, 282 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-11-23 22:39:24,364 INFO L231 Difference]: Finished difference. Result has 60 places, 34 transitions, 216 flow [2023-11-23 22:39:24,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=60, PETRI_TRANSITIONS=34} [2023-11-23 22:39:24,365 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 35 predicate places. [2023-11-23 22:39:24,366 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 34 transitions, 216 flow [2023-11-23 22:39:24,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.517241379310345) internal successors, (276), 29 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:24,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:24,367 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:39:24,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:39:24,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:24,591 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:39:24,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:24,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1581857099, now seen corresponding path program 7 times [2023-11-23 22:39:24,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:24,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675229751] [2023-11-23 22:39:24,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:24,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:26,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:26,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675229751] [2023-11-23 22:39:26,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675229751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:39:26,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004300370] [2023-11-23 22:39:26,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 22:39:26,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:39:26,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:26,868 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:39:26,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_656ec19e-d524-4761-a44f-198dec1cbeeb/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:39:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:27,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-23 22:39:27,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:39:27,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 22:39:27,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:39:27,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-23 22:39:27,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:39:27,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-23 22:39:27,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:39:27,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-23 22:39:27,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:39:27,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-23 22:39:27,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:39:27,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-23 22:39:27,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:39:27,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-23 22:39:27,740 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-11-23 22:39:27,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2023-11-23 22:39:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:27,794 INFO L327 TraceCheckSpWp]: Computing backward predicates...