./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive.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_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/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_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/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_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/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 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:58:39,114 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:58:39,187 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 21:58:39,192 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:58:39,193 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:58:39,217 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:58:39,218 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:58:39,218 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:58:39,219 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:58:39,219 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:58:39,220 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:58:39,220 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:58:39,221 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:58:39,221 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:58:39,222 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:58:39,222 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:58:39,222 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 21:58:39,223 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:58:39,223 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:58:39,225 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:58:39,225 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:58:39,226 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 21:58:39,226 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:58:39,227 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 21:58:39,227 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:58:39,227 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:58:39,228 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 21:58:39,228 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:58:39,228 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:58:39,229 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:58:39,229 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:58:39,229 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:58:39,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:58:39,230 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:58:39,230 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:58:39,230 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 21:58:39,231 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:58:39,231 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:58:39,231 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:58:39,232 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:58:39,232 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:58:39,234 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:58:39,235 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_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 [2024-10-31 21:58:39,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:58:39,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:58:39,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:58:39,585 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:58:39,585 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:58:39,587 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c Unable to find full path for "g++" [2024-10-31 21:58:41,663 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:58:41,919 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:58:41,923 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2024-10-31 21:58:41,935 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/data/742693dab/7aa17e00e8e1481986144c8d77885361/FLAG9c6956fd6 [2024-10-31 21:58:41,956 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/data/742693dab/7aa17e00e8e1481986144c8d77885361 [2024-10-31 21:58:41,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:58:41,963 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:58:41,964 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:58:41,964 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:58:41,971 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:58:41,972 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:58:41" (1/1) ... [2024-10-31 21:58:41,976 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716dc39b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:41, skipping insertion in model container [2024-10-31 21:58:41,976 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:58:41" (1/1) ... [2024-10-31 21:58:42,015 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:58:42,261 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_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3146,3159] [2024-10-31 21:58:42,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:58:42,287 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:58:42,313 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_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3146,3159] [2024-10-31 21:58:42,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:58:42,341 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:58:42,342 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:42 WrapperNode [2024-10-31 21:58:42,342 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:58:42,343 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:58:42,343 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:58:42,343 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:58:42,351 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:42" (1/1) ... [2024-10-31 21:58:42,363 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:42" (1/1) ... [2024-10-31 21:58:42,407 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 148 [2024-10-31 21:58:42,407 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:58:42,408 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:58:42,408 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:58:42,409 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:58:42,423 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:42" (1/1) ... [2024-10-31 21:58:42,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:42" (1/1) ... [2024-10-31 21:58:42,426 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:42" (1/1) ... [2024-10-31 21:58:42,444 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 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 21:58:42,445 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:42" (1/1) ... [2024-10-31 21:58:42,445 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:42" (1/1) ... [2024-10-31 21:58:42,452 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:42" (1/1) ... [2024-10-31 21:58:42,459 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:42" (1/1) ... [2024-10-31 21:58:42,461 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:42" (1/1) ... [2024-10-31 21:58:42,463 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:42" (1/1) ... [2024-10-31 21:58:42,472 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:58:42,473 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:58:42,473 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:58:42,473 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:58:42,474 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:42" (1/1) ... [2024-10-31 21:58:42,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:58:42,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:42,512 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:58:42,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:58:42,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:58:42,560 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 21:58:42,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 21:58:42,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 21:58:42,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 21:58:42,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 21:58:42,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 21:58:42,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:58:42,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 21:58:42,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 21:58:42,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 21:58:42,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 21:58:42,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 21:58:42,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 21:58:42,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:58:42,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:58:42,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 21:58:42,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 21:58:42,566 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 21:58:42,688 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:58:42,691 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:58:42,986 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 21:58:42,986 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:58:43,290 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:58:43,290 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-31 21:58:43,291 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:58:43 BoogieIcfgContainer [2024-10-31 21:58:43,291 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:58:43,293 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:58:43,294 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:58:43,297 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:58:43,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:58:41" (1/3) ... [2024-10-31 21:58:43,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303aa374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:58:43, skipping insertion in model container [2024-10-31 21:58:43,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:42" (2/3) ... [2024-10-31 21:58:43,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303aa374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:58:43, skipping insertion in model container [2024-10-31 21:58:43,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:58:43" (3/3) ... [2024-10-31 21:58:43,303 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2024-10-31 21:58:43,324 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:58:43,325 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 21:58:43,325 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 21:58:43,388 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 21:58:43,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 36 transitions, 93 flow [2024-10-31 21:58:43,491 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-10-31 21:58:43,491 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 21:58:43,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 33 events. 4/33 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 57 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-10-31 21:58:43,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 36 transitions, 93 flow [2024-10-31 21:58:43,504 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 32 transitions, 82 flow [2024-10-31 21:58:43,518 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:58:43,525 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;@5b859231, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:58:43,525 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-31 21:58:43,552 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 21:58:43,552 INFO L124 PetriNetUnfolderBase]: 4/31 cut-off events. [2024-10-31 21:58:43,552 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 21:58:43,553 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:58:43,553 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:43,557 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:58:43,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:43,565 INFO L85 PathProgramCache]: Analyzing trace with hash -594700694, now seen corresponding path program 1 times [2024-10-31 21:58:43,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:43,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724813912] [2024-10-31 21:58:43,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:43,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:44,430 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 21:58:44,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:44,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724813912] [2024-10-31 21:58:44,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724813912] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:58:44,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:58:44,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 21:58:44,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772120028] [2024-10-31 21:58:44,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:58:44,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:58:44,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:44,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:58:44,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:58:44,540 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2024-10-31 21:58:44,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 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 21:58:44,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:58:44,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2024-10-31 21:58:44,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:58:45,046 INFO L124 PetriNetUnfolderBase]: 487/825 cut-off events. [2024-10-31 21:58:45,046 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-10-31 21:58:45,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 825 events. 487/825 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3982 event pairs, 54 based on Foata normal form. 84/853 useless extension candidates. Maximal degree in co-relation 1551. Up to 280 conditions per place. [2024-10-31 21:58:45,062 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 53 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-10-31 21:58:45,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 66 transitions, 276 flow [2024-10-31 21:58:45,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:58:45,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 21:58:45,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-10-31 21:58:45,074 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-10-31 21:58:45,076 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 82 flow. Second operand 5 states and 119 transitions. [2024-10-31 21:58:45,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 66 transitions, 276 flow [2024-10-31 21:58:45,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 66 transitions, 256 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 21:58:45,085 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 94 flow [2024-10-31 21:58:45,088 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-10-31 21:58:45,095 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2024-10-31 21:58:45,095 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 94 flow [2024-10-31 21:58:45,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 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 21:58:45,096 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:58:45,096 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:45,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 21:58:45,096 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:58:45,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:45,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1967084675, now seen corresponding path program 1 times [2024-10-31 21:58:45,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:45,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892703930] [2024-10-31 21:58:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:45,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:45,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:58:45,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:45,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892703930] [2024-10-31 21:58:45,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892703930] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:58:45,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:58:45,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:58:45,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878830213] [2024-10-31 21:58:45,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:58:45,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:58:45,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:45,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:58:45,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:58:45,218 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-10-31 21:58:45,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 21:58:45,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:58:45,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-10-31 21:58:45,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:58:45,338 INFO L124 PetriNetUnfolderBase]: 190/380 cut-off events. [2024-10-31 21:58:45,338 INFO L125 PetriNetUnfolderBase]: For 347/444 co-relation queries the response was YES. [2024-10-31 21:58:45,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 804 conditions, 380 events. 190/380 cut-off events. For 347/444 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1586 event pairs, 61 based on Foata normal form. 115/446 useless extension candidates. Maximal degree in co-relation 254. Up to 240 conditions per place. [2024-10-31 21:58:45,344 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 24 selfloop transitions, 3 changer transitions 2/42 dead transitions. [2024-10-31 21:58:45,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 169 flow [2024-10-31 21:58:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:58:45,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:58:45,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-10-31 21:58:45,346 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-10-31 21:58:45,346 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 94 flow. Second operand 3 states and 74 transitions. [2024-10-31 21:58:45,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 169 flow [2024-10-31 21:58:45,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 42 transitions, 165 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:58:45,350 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 109 flow [2024-10-31 21:58:45,350 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-10-31 21:58:45,351 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2024-10-31 21:58:45,351 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 109 flow [2024-10-31 21:58:45,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 21:58:45,353 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:58:45,353 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:45,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 21:58:45,354 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:58:45,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:45,355 INFO L85 PathProgramCache]: Analyzing trace with hash 637441564, now seen corresponding path program 1 times [2024-10-31 21:58:45,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:45,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827302069] [2024-10-31 21:58:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:45,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 21:58:45,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:45,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827302069] [2024-10-31 21:58:45,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827302069] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:58:45,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:58:45,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:58:45,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118999697] [2024-10-31 21:58:45,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:58:45,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:58:45,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:45,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:58:45,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:58:45,579 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-10-31 21:58:45,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 21:58:45,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:58:45,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-10-31 21:58:45,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:58:45,714 INFO L124 PetriNetUnfolderBase]: 203/405 cut-off events. [2024-10-31 21:58:45,715 INFO L125 PetriNetUnfolderBase]: For 409/547 co-relation queries the response was YES. [2024-10-31 21:58:45,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 405 events. 203/405 cut-off events. For 409/547 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1741 event pairs, 122 based on Foata normal form. 128/477 useless extension candidates. Maximal degree in co-relation 702. Up to 288 conditions per place. [2024-10-31 21:58:45,718 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 22 selfloop transitions, 2 changer transitions 10/47 dead transitions. [2024-10-31 21:58:45,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 202 flow [2024-10-31 21:58:45,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:58:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:58:45,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-10-31 21:58:45,721 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-10-31 21:58:45,722 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 109 flow. Second operand 4 states and 92 transitions. [2024-10-31 21:58:45,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 202 flow [2024-10-31 21:58:45,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 21:58:45,727 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 120 flow [2024-10-31 21:58:45,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-10-31 21:58:45,728 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2024-10-31 21:58:45,729 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 120 flow [2024-10-31 21:58:45,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 21:58:45,730 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:58:45,730 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:45,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 21:58:45,730 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:58:45,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:45,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1066497001, now seen corresponding path program 1 times [2024-10-31 21:58:45,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:45,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062527403] [2024-10-31 21:58:45,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:45,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 21:58:45,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:45,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062527403] [2024-10-31 21:58:45,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062527403] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:45,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647477536] [2024-10-31 21:58:45,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:45,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:45,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:45,971 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:45,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 21:58:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:46,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 21:58:46,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 21:58:46,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 21:58:46,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647477536] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:58:46,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:58:46,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2024-10-31 21:58:46,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756099473] [2024-10-31 21:58:46,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:58:46,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 21:58:46,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:46,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 21:58:46,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:58:46,469 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2024-10-31 21:58:46,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 120 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:46,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:58:46,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2024-10-31 21:58:46,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:58:46,868 INFO L124 PetriNetUnfolderBase]: 810/1303 cut-off events. [2024-10-31 21:58:46,868 INFO L125 PetriNetUnfolderBase]: For 1197/1508 co-relation queries the response was YES. [2024-10-31 21:58:46,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3345 conditions, 1303 events. 810/1303 cut-off events. For 1197/1508 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6003 event pairs, 82 based on Foata normal form. 345/1586 useless extension candidates. Maximal degree in co-relation 3329. Up to 376 conditions per place. [2024-10-31 21:58:46,877 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 70 selfloop transitions, 13 changer transitions 15/104 dead transitions. [2024-10-31 21:58:46,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 104 transitions, 551 flow [2024-10-31 21:58:46,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 21:58:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 21:58:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-10-31 21:58:46,880 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2024-10-31 21:58:46,880 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 120 flow. Second operand 10 states and 178 transitions. [2024-10-31 21:58:46,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 104 transitions, 551 flow [2024-10-31 21:58:46,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 104 transitions, 539 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-10-31 21:58:46,885 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 188 flow [2024-10-31 21:58:46,885 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=188, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2024-10-31 21:58:46,886 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2024-10-31 21:58:46,886 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 188 flow [2024-10-31 21:58:46,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:46,886 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:58:46,887 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:46,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 21:58:47,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:47,091 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:58:47,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:47,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1993090265, now seen corresponding path program 2 times [2024-10-31 21:58:47,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:47,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937370188] [2024-10-31 21:58:47,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:47,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:58:47,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:47,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937370188] [2024-10-31 21:58:47,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937370188] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:47,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520827200] [2024-10-31 21:58:47,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 21:58:47,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:47,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:47,941 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:47,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 21:58:48,052 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 21:58:48,052 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:58:48,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-31 21:58:48,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:48,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-31 21:58:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:58:48,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:49,154 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 61 treesize of output 55 [2024-10-31 21:58:49,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 21:58:49,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-10-31 21:58:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:58:49,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520827200] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:58:49,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:58:49,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-31 21:58:49,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453004828] [2024-10-31 21:58:49,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:58:49,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-31 21:58:49,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:49,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-31 21:58:49,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2024-10-31 21:58:49,432 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2024-10-31 21:58:49,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 188 flow. Second operand has 25 states, 25 states have (on average 12.72) internal successors, (318), 25 states have internal predecessors, (318), 0 states have call successors, (0), 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 21:58:49,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:58:49,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2024-10-31 21:58:49,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:58:53,042 INFO L124 PetriNetUnfolderBase]: 2082/3645 cut-off events. [2024-10-31 21:58:53,043 INFO L125 PetriNetUnfolderBase]: For 3414/3414 co-relation queries the response was YES. [2024-10-31 21:58:53,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9758 conditions, 3645 events. 2082/3645 cut-off events. For 3414/3414 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 21639 event pairs, 175 based on Foata normal form. 212/3819 useless extension candidates. Maximal degree in co-relation 7846. Up to 577 conditions per place. [2024-10-31 21:58:53,070 INFO L140 encePairwiseOnDemand]: 23/36 looper letters, 226 selfloop transitions, 68 changer transitions 22/328 dead transitions. [2024-10-31 21:58:53,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 328 transitions, 1800 flow [2024-10-31 21:58:53,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-31 21:58:53,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-10-31 21:58:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 736 transitions. [2024-10-31 21:58:53,077 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-10-31 21:58:53,077 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 188 flow. Second operand 43 states and 736 transitions. [2024-10-31 21:58:53,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 328 transitions, 1800 flow [2024-10-31 21:58:53,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 328 transitions, 1775 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:58:53,106 INFO L231 Difference]: Finished difference. Result has 110 places, 104 transitions, 713 flow [2024-10-31 21:58:53,107 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=713, PETRI_PLACES=110, PETRI_TRANSITIONS=104} [2024-10-31 21:58:53,108 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 72 predicate places. [2024-10-31 21:58:53,110 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 104 transitions, 713 flow [2024-10-31 21:58:53,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 12.72) internal successors, (318), 25 states have internal predecessors, (318), 0 states have call successors, (0), 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 21:58:53,111 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:58:53,111 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:53,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 21:58:53,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:53,315 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:58:53,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:53,316 INFO L85 PathProgramCache]: Analyzing trace with hash 289155180, now seen corresponding path program 3 times [2024-10-31 21:58:53,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:53,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595770955] [2024-10-31 21:58:53,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:53,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 21:58:53,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:53,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595770955] [2024-10-31 21:58:53,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595770955] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:53,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869727108] [2024-10-31 21:58:53,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 21:58:53,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:53,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:53,590 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:53,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 21:58:53,684 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-31 21:58:53,684 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:58:53,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 21:58:53,687 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 21:58:53,754 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:58:53,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869727108] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:58:53,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:58:53,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-10-31 21:58:53,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713945566] [2024-10-31 21:58:53,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:58:53,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:58:53,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:53,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:58:53,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-31 21:58:53,805 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 36 [2024-10-31 21:58:53,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 104 transitions, 713 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:53,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:58:53,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 36 [2024-10-31 21:58:53,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:58:54,697 INFO L124 PetriNetUnfolderBase]: 1929/3476 cut-off events. [2024-10-31 21:58:54,698 INFO L125 PetriNetUnfolderBase]: For 18749/18749 co-relation queries the response was YES. [2024-10-31 21:58:54,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13625 conditions, 3476 events. 1929/3476 cut-off events. For 18749/18749 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 21139 event pairs, 150 based on Foata normal form. 102/3550 useless extension candidates. Maximal degree in co-relation 11657. Up to 923 conditions per place. [2024-10-31 21:58:54,741 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 99 selfloop transitions, 34 changer transitions 30/173 dead transitions. [2024-10-31 21:58:54,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 173 transitions, 1510 flow [2024-10-31 21:58:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 21:58:54,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 21:58:54,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-10-31 21:58:54,743 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5308641975308642 [2024-10-31 21:58:54,743 INFO L175 Difference]: Start difference. First operand has 110 places, 104 transitions, 713 flow. Second operand 9 states and 172 transitions. [2024-10-31 21:58:54,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 173 transitions, 1510 flow [2024-10-31 21:58:54,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 173 transitions, 1407 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-10-31 21:58:54,803 INFO L231 Difference]: Finished difference. Result has 119 places, 101 transitions, 757 flow [2024-10-31 21:58:54,804 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=757, PETRI_PLACES=119, PETRI_TRANSITIONS=101} [2024-10-31 21:58:54,806 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 81 predicate places. [2024-10-31 21:58:54,807 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 101 transitions, 757 flow [2024-10-31 21:58:54,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:54,808 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:58:54,808 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:54,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 21:58:55,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:55,009 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:58:55,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:55,010 INFO L85 PathProgramCache]: Analyzing trace with hash 753835570, now seen corresponding path program 4 times [2024-10-31 21:58:55,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:55,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60566877] [2024-10-31 21:58:55,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:55,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:58:56,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:56,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60566877] [2024-10-31 21:58:56,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60566877] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:56,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394268001] [2024-10-31 21:58:56,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 21:58:56,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:56,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:56,843 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:56,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 21:58:56,953 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 21:58:56,954 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:58:56,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-31 21:58:56,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 21:58:57,341 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:57,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 21:58:57,594 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 40 treesize of output 24 [2024-10-31 21:58:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 21:58:57,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394268001] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:58:57,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:58:57,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 26 [2024-10-31 21:58:57,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620377697] [2024-10-31 21:58:57,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:58:57,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-31 21:58:57,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:57,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-31 21:58:57,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2024-10-31 21:58:58,068 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2024-10-31 21:58:58,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 101 transitions, 757 flow. Second operand has 27 states, 27 states have (on average 10.666666666666666) internal successors, (288), 27 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:58,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:58:58,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2024-10-31 21:58:58,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:59:01,330 INFO L124 PetriNetUnfolderBase]: 4731/7318 cut-off events. [2024-10-31 21:59:01,331 INFO L125 PetriNetUnfolderBase]: For 39546/39732 co-relation queries the response was YES. [2024-10-31 21:59:01,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30048 conditions, 7318 events. 4731/7318 cut-off events. For 39546/39732 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 40474 event pairs, 286 based on Foata normal form. 106/7358 useless extension candidates. Maximal degree in co-relation 27381. Up to 1370 conditions per place. [2024-10-31 21:59:01,434 INFO L140 encePairwiseOnDemand]: 22/36 looper letters, 163 selfloop transitions, 101 changer transitions 22/302 dead transitions. [2024-10-31 21:59:01,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 302 transitions, 2617 flow [2024-10-31 21:59:01,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-31 21:59:01,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-31 21:59:01,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 432 transitions. [2024-10-31 21:59:01,437 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-10-31 21:59:01,437 INFO L175 Difference]: Start difference. First operand has 119 places, 101 transitions, 757 flow. Second operand 28 states and 432 transitions. [2024-10-31 21:59:01,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 302 transitions, 2617 flow [2024-10-31 21:59:01,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 302 transitions, 2455 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-10-31 21:59:01,605 INFO L231 Difference]: Finished difference. Result has 146 places, 155 transitions, 1406 flow [2024-10-31 21:59:01,606 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1406, PETRI_PLACES=146, PETRI_TRANSITIONS=155} [2024-10-31 21:59:01,606 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 108 predicate places. [2024-10-31 21:59:01,607 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 155 transitions, 1406 flow [2024-10-31 21:59:01,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.666666666666666) internal successors, (288), 27 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:01,607 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:59:01,608 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:01,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 21:59:01,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:01,812 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:59:01,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:01,813 INFO L85 PathProgramCache]: Analyzing trace with hash 397631086, now seen corresponding path program 5 times [2024-10-31 21:59:01,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:01,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426163435] [2024-10-31 21:59:01,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:01,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:59:01,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:01,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426163435] [2024-10-31 21:59:01,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426163435] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:59:01,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:59:01,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:59:01,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874123068] [2024-10-31 21:59:01,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:01,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:59:01,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:01,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:59:01,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:59:01,930 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-10-31 21:59:01,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 155 transitions, 1406 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 21:59:01,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:59:01,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-10-31 21:59:01,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:59:02,907 INFO L124 PetriNetUnfolderBase]: 1878/3786 cut-off events. [2024-10-31 21:59:02,907 INFO L125 PetriNetUnfolderBase]: For 51238/51558 co-relation queries the response was YES. [2024-10-31 21:59:02,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21059 conditions, 3786 events. 1878/3786 cut-off events. For 51238/51558 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 25747 event pairs, 470 based on Foata normal form. 203/3731 useless extension candidates. Maximal degree in co-relation 18150. Up to 1266 conditions per place. [2024-10-31 21:59:02,974 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 89 selfloop transitions, 42 changer transitions 0/204 dead transitions. [2024-10-31 21:59:02,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 204 transitions, 2186 flow [2024-10-31 21:59:02,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:59:02,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:59:02,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-10-31 21:59:02,978 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7361111111111112 [2024-10-31 21:59:02,978 INFO L175 Difference]: Start difference. First operand has 146 places, 155 transitions, 1406 flow. Second operand 4 states and 106 transitions. [2024-10-31 21:59:02,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 204 transitions, 2186 flow [2024-10-31 21:59:03,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 204 transitions, 1897 flow, removed 89 selfloop flow, removed 9 redundant places. [2024-10-31 21:59:03,123 INFO L231 Difference]: Finished difference. Result has 142 places, 184 transitions, 1700 flow [2024-10-31 21:59:03,124 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1700, PETRI_PLACES=142, PETRI_TRANSITIONS=184} [2024-10-31 21:59:03,124 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 104 predicate places. [2024-10-31 21:59:03,125 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 184 transitions, 1700 flow [2024-10-31 21:59:03,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 21:59:03,125 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:59:03,125 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:03,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 21:59:03,126 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:59:03,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:03,127 INFO L85 PathProgramCache]: Analyzing trace with hash 628392377, now seen corresponding path program 6 times [2024-10-31 21:59:03,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:03,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254610050] [2024-10-31 21:59:03,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:03,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:59:03,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:03,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254610050] [2024-10-31 21:59:03,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254610050] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:03,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435449074] [2024-10-31 21:59:03,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 21:59:03,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:03,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:03,483 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:03,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 21:59:03,582 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-31 21:59:03,583 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:59:03,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 21:59:03,587 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:59:03,815 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:59:04,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435449074] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:59:04,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:59:04,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-10-31 21:59:04,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828181702] [2024-10-31 21:59:04,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:04,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 21:59:04,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:04,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 21:59:04,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-10-31 21:59:04,063 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 36 [2024-10-31 21:59:04,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 184 transitions, 1700 flow. Second operand has 17 states, 17 states have (on average 17.705882352941178) internal successors, (301), 17 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:04,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:59:04,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 36 [2024-10-31 21:59:04,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:59:04,963 INFO L124 PetriNetUnfolderBase]: 1341/2796 cut-off events. [2024-10-31 21:59:04,964 INFO L125 PetriNetUnfolderBase]: For 35173/35428 co-relation queries the response was YES. [2024-10-31 21:59:04,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15515 conditions, 2796 events. 1341/2796 cut-off events. For 35173/35428 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 17928 event pairs, 365 based on Foata normal form. 105/2694 useless extension candidates. Maximal degree in co-relation 12589. Up to 1510 conditions per place. [2024-10-31 21:59:05,014 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 73 selfloop transitions, 11 changer transitions 30/173 dead transitions. [2024-10-31 21:59:05,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 173 transitions, 1644 flow [2024-10-31 21:59:05,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 21:59:05,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 21:59:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-10-31 21:59:05,016 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5679012345679012 [2024-10-31 21:59:05,016 INFO L175 Difference]: Start difference. First operand has 142 places, 184 transitions, 1700 flow. Second operand 9 states and 184 transitions. [2024-10-31 21:59:05,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 173 transitions, 1644 flow [2024-10-31 21:59:05,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 173 transitions, 1533 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-10-31 21:59:05,094 INFO L231 Difference]: Finished difference. Result has 139 places, 139 transitions, 1169 flow [2024-10-31 21:59:05,095 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1169, PETRI_PLACES=139, PETRI_TRANSITIONS=139} [2024-10-31 21:59:05,097 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 101 predicate places. [2024-10-31 21:59:05,097 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 139 transitions, 1169 flow [2024-10-31 21:59:05,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 17.705882352941178) internal successors, (301), 17 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:05,098 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:59:05,098 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:05,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 21:59:05,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7afa3950-a513-4f88-b5b5-fe2b5bcf9c35/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:05,299 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:59:05,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:05,299 INFO L85 PathProgramCache]: Analyzing trace with hash -120794088, now seen corresponding path program 7 times [2024-10-31 21:59:05,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:05,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058819365] [2024-10-31 21:59:05,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:05,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 21:59:05,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:05,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058819365] [2024-10-31 21:59:05,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058819365] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:59:05,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:59:05,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 21:59:05,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881182241] [2024-10-31 21:59:05,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:05,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:59:05,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:05,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:59:05,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:59:05,554 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2024-10-31 21:59:05,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 139 transitions, 1169 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:05,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:59:05,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2024-10-31 21:59:05,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:59:06,556 INFO L124 PetriNetUnfolderBase]: 2472/4644 cut-off events. [2024-10-31 21:59:06,556 INFO L125 PetriNetUnfolderBase]: For 50829/51215 co-relation queries the response was YES. [2024-10-31 21:59:06,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24458 conditions, 4644 events. 2472/4644 cut-off events. For 50829/51215 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 29165 event pairs, 588 based on Foata normal form. 342/4699 useless extension candidates. Maximal degree in co-relation 21255. Up to 1921 conditions per place. [2024-10-31 21:59:06,608 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 104 selfloop transitions, 15 changer transitions 0/160 dead transitions. [2024-10-31 21:59:06,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 160 transitions, 1607 flow [2024-10-31 21:59:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:59:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:59:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-10-31 21:59:06,609 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-10-31 21:59:06,610 INFO L175 Difference]: Start difference. First operand has 139 places, 139 transitions, 1169 flow. Second operand 4 states and 88 transitions. [2024-10-31 21:59:06,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 160 transitions, 1607 flow [2024-10-31 21:59:06,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 160 transitions, 1569 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-10-31 21:59:06,672 INFO L231 Difference]: Finished difference. Result has 123 places, 139 transitions, 1224 flow [2024-10-31 21:59:06,673 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1224, PETRI_PLACES=123, PETRI_TRANSITIONS=139} [2024-10-31 21:59:06,673 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 85 predicate places. [2024-10-31 21:59:06,673 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 139 transitions, 1224 flow [2024-10-31 21:59:06,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:06,674 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:59:06,674 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:06,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 21:59:06,674 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-31 21:59:06,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:06,674 INFO L85 PathProgramCache]: Analyzing trace with hash -991337334, now seen corresponding path program 1 times [2024-10-31 21:59:06,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:06,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094118616] [2024-10-31 21:59:06,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:06,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat