./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU --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 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:13:55,368 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:13:55,458 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:13:55,464 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:13:55,468 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:13:55,505 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:13:55,506 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:13:55,506 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:13:55,507 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:13:55,507 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:13:55,507 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:13:55,512 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:13:55,512 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:13:55,513 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:13:55,513 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:13:55,513 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:13:55,514 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:13:55,514 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:13:55,515 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:13:55,515 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:13:55,519 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:13:55,519 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:13:55,519 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:13:55,520 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:13:55,520 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:13:55,520 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:13:55,521 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:13:55,521 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:13:55,521 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:13:55,522 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:13:55,522 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:13:55,522 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:13:55,523 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:13:55,527 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:13:55,527 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:13:55,528 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:13:55,528 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:13:55,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:13:55,528 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:13:55,529 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:13:55,529 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:13:55,529 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:13:55,530 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_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b [2024-10-31 22:13:55,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:13:55,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:13:55,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:13:55,848 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:13:55,849 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:13:55,850 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c Unable to find full path for "g++" [2024-10-31 22:13:58,402 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:13:58,751 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:13:58,754 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2024-10-31 22:13:58,776 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/data/52df88f99/b86a690fb24c43728d3a13526045fd3f/FLAG8d8e90a85 [2024-10-31 22:13:58,994 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/data/52df88f99/b86a690fb24c43728d3a13526045fd3f [2024-10-31 22:13:58,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:13:59,000 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:13:59,002 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:13:59,002 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:13:59,009 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:13:59,010 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:13:58" (1/1) ... [2024-10-31 22:13:59,012 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38eab337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:59, skipping insertion in model container [2024-10-31 22:13:59,012 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:13:58" (1/1) ... [2024-10-31 22:13:59,053 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:13:59,327 WARN L251 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_2ca9ded6-1554-46a6-a58c-5b3006259d5c/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2500,2513] [2024-10-31 22:13:59,337 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:13:59,347 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:13:59,372 WARN L251 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_2ca9ded6-1554-46a6-a58c-5b3006259d5c/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2500,2513] [2024-10-31 22:13:59,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:13:59,398 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:13:59,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:59 WrapperNode [2024-10-31 22:13:59,398 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:13:59,400 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:13:59,400 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:13:59,400 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:13:59,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:59" (1/1) ... [2024-10-31 22:13:59,414 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:59" (1/1) ... [2024-10-31 22:13:59,437 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 134 [2024-10-31 22:13:59,438 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:13:59,439 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:13:59,439 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:13:59,439 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:13:59,453 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:59" (1/1) ... [2024-10-31 22:13:59,454 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:59" (1/1) ... [2024-10-31 22:13:59,456 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:59" (1/1) ... [2024-10-31 22:13:59,473 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-31 22:13:59,473 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:59" (1/1) ... [2024-10-31 22:13:59,473 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:59" (1/1) ... [2024-10-31 22:13:59,482 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:59" (1/1) ... [2024-10-31 22:13:59,493 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:59" (1/1) ... [2024-10-31 22:13:59,494 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:59" (1/1) ... [2024-10-31 22:13:59,499 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:59" (1/1) ... [2024-10-31 22:13:59,504 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:13:59,505 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:13:59,505 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:13:59,505 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:13:59,506 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:59" (1/1) ... [2024-10-31 22:13:59,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:13:59,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:59,542 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:13:59,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:13:59,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:13:59,570 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:13:59,571 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:13:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:13:59,571 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:13:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:13:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:13:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:13:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:13:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:13:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:13:59,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:13:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:13:59,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:13:59,575 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:13:59,695 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:13:59,698 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:14:00,011 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:14:00,011 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:14:00,294 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:14:00,294 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-31 22:14:00,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:14:00 BoogieIcfgContainer [2024-10-31 22:14:00,295 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:14:00,298 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:14:00,298 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:14:00,301 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:14:00,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:13:58" (1/3) ... [2024-10-31 22:14:00,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7f1bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:14:00, skipping insertion in model container [2024-10-31 22:14:00,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:59" (2/3) ... [2024-10-31 22:14:00,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7f1bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:14:00, skipping insertion in model container [2024-10-31 22:14:00,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:14:00" (3/3) ... [2024-10-31 22:14:00,315 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2024-10-31 22:14:00,340 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:14:00,341 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:14:00,341 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:14:00,417 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:14:00,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-10-31 22:14:00,506 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-10-31 22:14:00,507 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:14:00,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-10-31 22:14:00,510 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-10-31 22:14:00,513 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-10-31 22:14:00,526 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:14:00,532 INFO L333 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, 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;@8bca34d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:14:00,532 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-31 22:14:00,545 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:14:00,546 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-10-31 22:14:00,546 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:14:00,547 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:00,547 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:00,548 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:00,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:00,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1382470306, now seen corresponding path program 1 times [2024-10-31 22:14:00,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:00,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378411851] [2024-10-31 22:14:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:00,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:01,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:01,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378411851] [2024-10-31 22:14:01,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378411851] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:01,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:01,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:14:01,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669484717] [2024-10-31 22:14:01,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:01,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:14:01,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:01,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:14:01,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:01,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-31 22:14:01,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:01,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:01,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-31 22:14:01,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:01,261 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2024-10-31 22:14:01,262 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-31 22:14:01,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 118 event pairs, 22 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2024-10-31 22:14:01,267 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2024-10-31 22:14:01,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2024-10-31 22:14:01,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:14:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:14:01,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-10-31 22:14:01,284 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-10-31 22:14:01,287 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2024-10-31 22:14:01,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2024-10-31 22:14:01,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:14:01,295 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2024-10-31 22:14:01,298 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2024-10-31 22:14:01,303 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-10-31 22:14:01,303 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2024-10-31 22:14:01,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:01,304 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:01,305 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:01,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:14:01,329 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:01,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:01,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1898578683, now seen corresponding path program 1 times [2024-10-31 22:14:01,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:01,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973204564] [2024-10-31 22:14:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:01,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:01,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:01,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973204564] [2024-10-31 22:14:01,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973204564] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:01,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:01,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:14:01,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443279489] [2024-10-31 22:14:01,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:01,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:14:01,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:01,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:14:01,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:14:01,819 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-31 22:14:01,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:01,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:01,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-31 22:14:01,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:02,082 INFO L124 PetriNetUnfolderBase]: 67/123 cut-off events. [2024-10-31 22:14:02,083 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:14:02,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 123 events. 67/123 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 328 event pairs, 2 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 249. Up to 77 conditions per place. [2024-10-31 22:14:02,087 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 30 selfloop transitions, 11 changer transitions 2/44 dead transitions. [2024-10-31 22:14:02,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 44 transitions, 194 flow [2024-10-31 22:14:02,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:14:02,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:14:02,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2024-10-31 22:14:02,091 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-10-31 22:14:02,092 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 6 states and 62 transitions. [2024-10-31 22:14:02,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 44 transitions, 194 flow [2024-10-31 22:14:02,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 44 transitions, 190 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-31 22:14:02,095 INFO L231 Difference]: Finished difference. Result has 27 places, 28 transitions, 114 flow [2024-10-31 22:14:02,097 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=27, PETRI_TRANSITIONS=28} [2024-10-31 22:14:02,098 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2024-10-31 22:14:02,098 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 28 transitions, 114 flow [2024-10-31 22:14:02,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:02,099 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:02,099 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:02,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:14:02,100 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:02,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:02,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1602650249, now seen corresponding path program 2 times [2024-10-31 22:14:02,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:02,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456653152] [2024-10-31 22:14:02,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:02,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:02,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:02,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456653152] [2024-10-31 22:14:02,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456653152] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:02,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:02,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:14:02,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636121717] [2024-10-31 22:14:02,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:02,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:14:02,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:02,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:14:02,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:14:02,469 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-31 22:14:02,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 28 transitions, 114 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:02,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:02,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-31 22:14:02,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:02,685 INFO L124 PetriNetUnfolderBase]: 67/125 cut-off events. [2024-10-31 22:14:02,686 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-10-31 22:14:02,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 125 events. 67/125 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 328 event pairs, 0 based on Foata normal form. 1/104 useless extension candidates. Maximal degree in co-relation 362. Up to 77 conditions per place. [2024-10-31 22:14:02,689 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 29 selfloop transitions, 15 changer transitions 2/47 dead transitions. [2024-10-31 22:14:02,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 47 transitions, 268 flow [2024-10-31 22:14:02,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:14:02,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:14:02,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 64 transitions. [2024-10-31 22:14:02,692 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-10-31 22:14:02,692 INFO L175 Difference]: Start difference. First operand has 27 places, 28 transitions, 114 flow. Second operand 7 states and 64 transitions. [2024-10-31 22:14:02,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 47 transitions, 268 flow [2024-10-31 22:14:02,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 47 transitions, 260 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-10-31 22:14:02,699 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 173 flow [2024-10-31 22:14:02,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=173, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2024-10-31 22:14:02,701 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2024-10-31 22:14:02,702 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 173 flow [2024-10-31 22:14:02,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:02,703 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:02,703 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:02,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:14:02,704 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:02,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:02,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1602055603, now seen corresponding path program 3 times [2024-10-31 22:14:02,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:02,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177952900] [2024-10-31 22:14:02,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:02,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:02,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:02,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177952900] [2024-10-31 22:14:02,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177952900] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:02,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:02,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:14:02,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321533500] [2024-10-31 22:14:02,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:02,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:14:02,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:02,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:14:02,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:14:02,986 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-31 22:14:02,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:02,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:02,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-31 22:14:02,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:03,196 INFO L124 PetriNetUnfolderBase]: 83/158 cut-off events. [2024-10-31 22:14:03,197 INFO L125 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2024-10-31 22:14:03,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 158 events. 83/158 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 452 event pairs, 6 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 520. Up to 58 conditions per place. [2024-10-31 22:14:03,199 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 35 selfloop transitions, 19 changer transitions 2/57 dead transitions. [2024-10-31 22:14:03,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 57 transitions, 368 flow [2024-10-31 22:14:03,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:14:03,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:14:03,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 76 transitions. [2024-10-31 22:14:03,201 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-10-31 22:14:03,202 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 173 flow. Second operand 8 states and 76 transitions. [2024-10-31 22:14:03,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 57 transitions, 368 flow [2024-10-31 22:14:03,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 341 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-10-31 22:14:03,206 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 232 flow [2024-10-31 22:14:03,207 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=232, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-10-31 22:14:03,207 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2024-10-31 22:14:03,208 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 232 flow [2024-10-31 22:14:03,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:03,208 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:03,208 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:03,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:14:03,209 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:03,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:03,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1373918319, now seen corresponding path program 1 times [2024-10-31 22:14:03,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:03,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025895900] [2024-10-31 22:14:03,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:03,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:03,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:03,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:03,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025895900] [2024-10-31 22:14:03,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025895900] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:03,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530173811] [2024-10-31 22:14:03,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:03,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:03,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:03,481 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:03,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:14:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:03,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-31 22:14:03,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:03,705 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 15 treesize of output 1 [2024-10-31 22:14:04,148 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-31 22:14:04,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 17 [2024-10-31 22:14:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:04,177 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:05,316 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 72 treesize of output 64 [2024-10-31 22:14:05,353 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:14:05,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 129 [2024-10-31 22:14:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:06,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530173811] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:06,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:06,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2024-10-31 22:14:06,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854622935] [2024-10-31 22:14:06,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:06,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-31 22:14:06,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:06,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-31 22:14:06,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2024-10-31 22:14:06,232 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-31 22:14:06,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 232 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:06,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:06,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-31 22:14:06,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:08,158 INFO L124 PetriNetUnfolderBase]: 273/493 cut-off events. [2024-10-31 22:14:08,160 INFO L125 PetriNetUnfolderBase]: For 716/716 co-relation queries the response was YES. [2024-10-31 22:14:08,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1862 conditions, 493 events. 273/493 cut-off events. For 716/716 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1979 event pairs, 26 based on Foata normal form. 13/504 useless extension candidates. Maximal degree in co-relation 1213. Up to 171 conditions per place. [2024-10-31 22:14:08,172 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 71 selfloop transitions, 41 changer transitions 54/167 dead transitions. [2024-10-31 22:14:08,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 167 transitions, 1184 flow [2024-10-31 22:14:08,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-31 22:14:08,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-31 22:14:08,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 239 transitions. [2024-10-31 22:14:08,175 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4425925925925926 [2024-10-31 22:14:08,179 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 232 flow. Second operand 27 states and 239 transitions. [2024-10-31 22:14:08,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 167 transitions, 1184 flow [2024-10-31 22:14:08,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 167 transitions, 1129 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-10-31 22:14:08,193 INFO L231 Difference]: Finished difference. Result has 77 places, 59 transitions, 496 flow [2024-10-31 22:14:08,193 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=496, PETRI_PLACES=77, PETRI_TRANSITIONS=59} [2024-10-31 22:14:08,194 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2024-10-31 22:14:08,194 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 59 transitions, 496 flow [2024-10-31 22:14:08,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:08,195 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:08,195 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:08,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:14:08,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:08,396 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:08,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:08,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1621282384, now seen corresponding path program 1 times [2024-10-31 22:14:08,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:08,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215506666] [2024-10-31 22:14:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:08,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:08,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:08,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215506666] [2024-10-31 22:14:08,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215506666] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:08,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978537247] [2024-10-31 22:14:08,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:08,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:08,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:08,864 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:08,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:14:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:08,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:14:08,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:09,177 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 [2024-10-31 22:14:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:09,184 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:09,460 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-31 22:14:09,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2024-10-31 22:14:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:09,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978537247] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:09,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:09,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-10-31 22:14:09,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520590823] [2024-10-31 22:14:09,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:09,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 22:14:09,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:09,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 22:14:09,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:14:09,560 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-31 22:14:09,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 59 transitions, 496 flow. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:09,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:09,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-31 22:14:09,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:10,000 INFO L124 PetriNetUnfolderBase]: 217/389 cut-off events. [2024-10-31 22:14:10,000 INFO L125 PetriNetUnfolderBase]: For 1487/1487 co-relation queries the response was YES. [2024-10-31 22:14:10,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 389 events. 217/389 cut-off events. For 1487/1487 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1439 event pairs, 9 based on Foata normal form. 1/388 useless extension candidates. Maximal degree in co-relation 1848. Up to 236 conditions per place. [2024-10-31 22:14:10,007 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 59 selfloop transitions, 35 changer transitions 3/98 dead transitions. [2024-10-31 22:14:10,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 916 flow [2024-10-31 22:14:10,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:14:10,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 22:14:10,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2024-10-31 22:14:10,010 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-10-31 22:14:10,011 INFO L175 Difference]: Start difference. First operand has 77 places, 59 transitions, 496 flow. Second operand 10 states and 94 transitions. [2024-10-31 22:14:10,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 916 flow [2024-10-31 22:14:10,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 98 transitions, 795 flow, removed 47 selfloop flow, removed 12 redundant places. [2024-10-31 22:14:10,028 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 590 flow [2024-10-31 22:14:10,029 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=590, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2024-10-31 22:14:10,029 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2024-10-31 22:14:10,030 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 590 flow [2024-10-31 22:14:10,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:10,031 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:10,031 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:10,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:14:10,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:10,232 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:10,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:10,232 INFO L85 PathProgramCache]: Analyzing trace with hash 948205454, now seen corresponding path program 2 times [2024-10-31 22:14:10,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:10,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292708514] [2024-10-31 22:14:10,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:10,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:10,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:10,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292708514] [2024-10-31 22:14:10,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292708514] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:10,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057403946] [2024-10-31 22:14:10,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:14:10,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:10,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:10,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:10,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:14:10,821 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:14:10,821 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:10,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:14:10,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:10,969 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 [2024-10-31 22:14:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:10,976 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:11,229 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:14:11,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 33 [2024-10-31 22:14:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:11,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057403946] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:11,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:11,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2024-10-31 22:14:11,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705209920] [2024-10-31 22:14:11,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:11,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 22:14:11,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:11,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 22:14:11,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:14:11,406 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-31 22:14:11,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 590 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:11,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:11,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-31 22:14:11,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:11,961 INFO L124 PetriNetUnfolderBase]: 257/455 cut-off events. [2024-10-31 22:14:11,961 INFO L125 PetriNetUnfolderBase]: For 1502/1502 co-relation queries the response was YES. [2024-10-31 22:14:11,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2272 conditions, 455 events. 257/455 cut-off events. For 1502/1502 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1761 event pairs, 25 based on Foata normal form. 1/456 useless extension candidates. Maximal degree in co-relation 2148. Up to 350 conditions per place. [2024-10-31 22:14:11,967 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 66 selfloop transitions, 39 changer transitions 3/109 dead transitions. [2024-10-31 22:14:11,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 1045 flow [2024-10-31 22:14:11,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 22:14:11,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-31 22:14:11,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 94 transitions. [2024-10-31 22:14:11,969 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-10-31 22:14:11,970 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 590 flow. Second operand 11 states and 94 transitions. [2024-10-31 22:14:11,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 1045 flow [2024-10-31 22:14:11,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 977 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-10-31 22:14:11,983 INFO L231 Difference]: Finished difference. Result has 78 places, 87 transitions, 803 flow [2024-10-31 22:14:11,983 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=803, PETRI_PLACES=78, PETRI_TRANSITIONS=87} [2024-10-31 22:14:11,984 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 57 predicate places. [2024-10-31 22:14:11,984 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 87 transitions, 803 flow [2024-10-31 22:14:11,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:11,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:11,985 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:12,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:14:12,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:12,187 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:12,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:12,187 INFO L85 PathProgramCache]: Analyzing trace with hash 167384518, now seen corresponding path program 3 times [2024-10-31 22:14:12,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:12,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737348909] [2024-10-31 22:14:12,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:12,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:12,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:12,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737348909] [2024-10-31 22:14:12,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737348909] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:12,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841213136] [2024-10-31 22:14:12,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:14:12,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:12,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:12,555 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:12,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:14:12,635 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-31 22:14:12,636 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:12,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:14:12,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:12,799 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 [2024-10-31 22:14:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:12,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:12,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:14:12,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 69 [2024-10-31 22:14:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:13,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841213136] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:13,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:13,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2024-10-31 22:14:13,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885329310] [2024-10-31 22:14:13,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:13,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:14:13,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:13,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:14:13,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:14:13,083 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-31 22:14:13,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 87 transitions, 803 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:13,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:13,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-31 22:14:13,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:13,653 INFO L124 PetriNetUnfolderBase]: 271/513 cut-off events. [2024-10-31 22:14:13,654 INFO L125 PetriNetUnfolderBase]: For 1632/1632 co-relation queries the response was YES. [2024-10-31 22:14:13,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2524 conditions, 513 events. 271/513 cut-off events. For 1632/1632 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2244 event pairs, 0 based on Foata normal form. 1/514 useless extension candidates. Maximal degree in co-relation 2351. Up to 273 conditions per place. [2024-10-31 22:14:13,660 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 74 selfloop transitions, 56 changer transitions 8/139 dead transitions. [2024-10-31 22:14:13,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 1386 flow [2024-10-31 22:14:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:14:13,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-31 22:14:13,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2024-10-31 22:14:13,663 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-10-31 22:14:13,663 INFO L175 Difference]: Start difference. First operand has 78 places, 87 transitions, 803 flow. Second operand 14 states and 110 transitions. [2024-10-31 22:14:13,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 1386 flow [2024-10-31 22:14:13,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 139 transitions, 1328 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-10-31 22:14:13,678 INFO L231 Difference]: Finished difference. Result has 89 places, 106 transitions, 1096 flow [2024-10-31 22:14:13,679 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1096, PETRI_PLACES=89, PETRI_TRANSITIONS=106} [2024-10-31 22:14:13,679 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 68 predicate places. [2024-10-31 22:14:13,679 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 106 transitions, 1096 flow [2024-10-31 22:14:13,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:13,681 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:13,681 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:13,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:14:13,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:13,886 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:13,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:13,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1034006108, now seen corresponding path program 4 times [2024-10-31 22:14:13,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:13,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726826771] [2024-10-31 22:14:13,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:13,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:14,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:14,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726826771] [2024-10-31 22:14:14,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726826771] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:14,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796547472] [2024-10-31 22:14:14,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:14:14,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:14,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:14,309 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:14,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:14:14,396 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:14:14,397 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:14,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:14:14,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:14,521 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 [2024-10-31 22:14:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:14,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:14,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:14:14,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 33 [2024-10-31 22:14:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:14,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796547472] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:14,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:14,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-10-31 22:14:14,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722220465] [2024-10-31 22:14:14,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:14,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 22:14:14,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:14,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 22:14:14,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:14:14,859 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-31 22:14:14,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 1096 flow. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 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) [2024-10-31 22:14:14,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:14,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-31 22:14:14,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:15,351 INFO L124 PetriNetUnfolderBase]: 261/501 cut-off events. [2024-10-31 22:14:15,351 INFO L125 PetriNetUnfolderBase]: For 2151/2151 co-relation queries the response was YES. [2024-10-31 22:14:15,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2721 conditions, 501 events. 261/501 cut-off events. For 2151/2151 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2200 event pairs, 26 based on Foata normal form. 2/503 useless extension candidates. Maximal degree in co-relation 2651. Up to 366 conditions per place. [2024-10-31 22:14:15,358 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 73 selfloop transitions, 46 changer transitions 5/125 dead transitions. [2024-10-31 22:14:15,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 125 transitions, 1448 flow [2024-10-31 22:14:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:14:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:14:15,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2024-10-31 22:14:15,360 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-10-31 22:14:15,360 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 1096 flow. Second operand 9 states and 78 transitions. [2024-10-31 22:14:15,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 125 transitions, 1448 flow [2024-10-31 22:14:15,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 125 transitions, 1345 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-10-31 22:14:15,381 INFO L231 Difference]: Finished difference. Result has 88 places, 107 transitions, 1135 flow [2024-10-31 22:14:15,381 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1135, PETRI_PLACES=88, PETRI_TRANSITIONS=107} [2024-10-31 22:14:15,382 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2024-10-31 22:14:15,382 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 107 transitions, 1135 flow [2024-10-31 22:14:15,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 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) [2024-10-31 22:14:15,383 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:15,385 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:15,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:14:15,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:15,590 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:15,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:15,590 INFO L85 PathProgramCache]: Analyzing trace with hash -626578467, now seen corresponding path program 5 times [2024-10-31 22:14:15,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:15,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907879271] [2024-10-31 22:14:15,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:15,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:15,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:15,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907879271] [2024-10-31 22:14:15,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907879271] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:15,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901465684] [2024-10-31 22:14:15,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 22:14:15,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:15,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:15,925 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:15,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:14:16,129 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:14:16,129 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:16,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:14:16,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:16,236 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:14:16,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901465684] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:16,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:14:16,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2024-10-31 22:14:16,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029414598] [2024-10-31 22:14:16,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:16,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:14:16,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:16,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:14:16,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:14:16,238 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-31 22:14:16,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 107 transitions, 1135 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:16,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:16,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-31 22:14:16,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:16,507 INFO L124 PetriNetUnfolderBase]: 283/548 cut-off events. [2024-10-31 22:14:16,508 INFO L125 PetriNetUnfolderBase]: For 2443/2443 co-relation queries the response was YES. [2024-10-31 22:14:16,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3021 conditions, 548 events. 283/548 cut-off events. For 2443/2443 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2457 event pairs, 43 based on Foata normal form. 10/558 useless extension candidates. Maximal degree in co-relation 2901. Up to 216 conditions per place. [2024-10-31 22:14:16,514 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 93 selfloop transitions, 42 changer transitions 0/136 dead transitions. [2024-10-31 22:14:16,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 136 transitions, 1633 flow [2024-10-31 22:14:16,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:14:16,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:14:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-10-31 22:14:16,516 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-10-31 22:14:16,516 INFO L175 Difference]: Start difference. First operand has 88 places, 107 transitions, 1135 flow. Second operand 5 states and 59 transitions. [2024-10-31 22:14:16,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 136 transitions, 1633 flow [2024-10-31 22:14:16,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 136 transitions, 1540 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-10-31 22:14:16,537 INFO L231 Difference]: Finished difference. Result has 89 places, 114 transitions, 1279 flow [2024-10-31 22:14:16,537 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1279, PETRI_PLACES=89, PETRI_TRANSITIONS=114} [2024-10-31 22:14:16,539 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 68 predicate places. [2024-10-31 22:14:16,540 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 114 transitions, 1279 flow [2024-10-31 22:14:16,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:16,540 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:16,540 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:16,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:14:16,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:16,741 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:16,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:16,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1232031080, now seen corresponding path program 2 times [2024-10-31 22:14:16,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:16,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308541853] [2024-10-31 22:14:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:16,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:14:17,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:17,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308541853] [2024-10-31 22:14:17,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308541853] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:17,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151945933] [2024-10-31 22:14:17,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:14:17,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:17,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:17,038 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:17,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:14:17,172 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:14:17,172 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:17,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:14:17,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:14:17,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:14:17,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151945933] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:17,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:17,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-31 22:14:17,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866138318] [2024-10-31 22:14:17,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:17,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 22:14:17,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:17,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 22:14:17,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:14:17,424 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-31 22:14:17,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 114 transitions, 1279 flow. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:17,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:17,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-31 22:14:17,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:18,446 INFO L124 PetriNetUnfolderBase]: 401/805 cut-off events. [2024-10-31 22:14:18,446 INFO L125 PetriNetUnfolderBase]: For 4027/4027 co-relation queries the response was YES. [2024-10-31 22:14:18,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4359 conditions, 805 events. 401/805 cut-off events. For 4027/4027 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4175 event pairs, 56 based on Foata normal form. 21/825 useless extension candidates. Maximal degree in co-relation 4233. Up to 257 conditions per place. [2024-10-31 22:14:18,454 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 127 selfloop transitions, 94 changer transitions 0/222 dead transitions. [2024-10-31 22:14:18,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 222 transitions, 2463 flow [2024-10-31 22:14:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-31 22:14:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-31 22:14:18,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 183 transitions. [2024-10-31 22:14:18,456 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-10-31 22:14:18,456 INFO L175 Difference]: Start difference. First operand has 89 places, 114 transitions, 1279 flow. Second operand 20 states and 183 transitions. [2024-10-31 22:14:18,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 222 transitions, 2463 flow [2024-10-31 22:14:18,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 222 transitions, 2381 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-10-31 22:14:18,506 INFO L231 Difference]: Finished difference. Result has 116 places, 159 transitions, 2012 flow [2024-10-31 22:14:18,510 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2012, PETRI_PLACES=116, PETRI_TRANSITIONS=159} [2024-10-31 22:14:18,510 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 95 predicate places. [2024-10-31 22:14:18,511 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 159 transitions, 2012 flow [2024-10-31 22:14:18,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:18,511 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:18,511 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:18,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 22:14:18,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:18,716 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-31 22:14:18,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:18,716 INFO L85 PathProgramCache]: Analyzing trace with hash 200655015, now seen corresponding path program 6 times [2024-10-31 22:14:18,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:18,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043949873] [2024-10-31 22:14:18,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:18,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:18,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:18,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043949873] [2024-10-31 22:14:18,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043949873] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:18,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553342073] [2024-10-31 22:14:18,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 22:14:18,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:18,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:18,995 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:18,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ca9ded6-1554-46a6-a58c-5b3006259d5c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:14:19,085 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-31 22:14:19,085 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:19,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-31 22:14:19,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:19,133 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 15 treesize of output 1 [2024-10-31 22:14:19,433 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:14:19,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 18 [2024-10-31 22:14:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:19,463 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:20,275 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 87 treesize of output 77 [2024-10-31 22:14:20,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:14:20,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2024-10-31 22:14:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:22,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553342073] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:22,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:22,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2024-10-31 22:14:22,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656544036] [2024-10-31 22:14:22,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:22,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-31 22:14:22,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:22,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-31 22:14:22,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2024-10-31 22:14:22,182 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-31 22:14:22,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 159 transitions, 2012 flow. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:22,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:22,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-31 22:14:22,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand