./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX --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 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 17:21:05,647 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 17:21:05,755 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 17:21:05,764 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 17:21:05,764 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 17:21:05,801 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 17:21:05,803 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 17:21:05,804 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 17:21:05,805 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 17:21:05,806 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 17:21:05,807 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 17:21:05,807 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 17:21:05,809 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 17:21:05,811 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 17:21:05,811 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 17:21:05,812 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 17:21:05,812 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 17:21:05,812 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 17:21:05,813 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 17:21:05,813 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 17:21:05,818 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 17:21:05,818 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 17:21:05,819 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 17:21:05,819 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 17:21:05,819 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 17:21:05,819 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 17:21:05,820 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 17:21:05,820 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 17:21:05,820 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 17:21:05,821 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 17:21:05,821 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 17:21:05,823 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 17:21:05,824 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:21:05,825 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 17:21:05,825 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 17:21:05,826 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 17:21:05,826 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 17:21:05,826 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 17:21:05,827 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 17:21:05,827 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 17:21:05,827 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 17:21:05,828 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 17:21:05,828 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_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b [2024-11-08 17:21:06,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 17:21:06,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 17:21:06,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 17:21:06,163 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 17:21:06,165 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 17:21:06,167 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c Unable to find full path for "g++" [2024-11-08 17:21:08,226 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 17:21:08,442 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 17:21:08,442 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2024-11-08 17:21:08,457 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/data/f303206b7/a63b9aeaf5d243f08bb7a65360ef1fa8/FLAGe32856767 [2024-11-08 17:21:08,806 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/data/f303206b7/a63b9aeaf5d243f08bb7a65360ef1fa8 [2024-11-08 17:21:08,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 17:21:08,813 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 17:21:08,815 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 17:21:08,816 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 17:21:08,822 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 17:21:08,823 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:21:08" (1/1) ... [2024-11-08 17:21:08,824 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@208fc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:21:08, skipping insertion in model container [2024-11-08 17:21:08,825 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:21:08" (1/1) ... [2024-11-08 17:21:08,855 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 17:21:09,099 WARN L250 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_1aa54873-3766-49ea-9de9-068fc1bf1ef2/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2950,2963] [2024-11-08 17:21:09,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:21:09,138 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 17:21:09,175 WARN L250 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_1aa54873-3766-49ea-9de9-068fc1bf1ef2/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2950,2963] [2024-11-08 17:21:09,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:21:09,207 INFO L204 MainTranslator]: Completed translation [2024-11-08 17:21:09,207 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:21:09 WrapperNode [2024-11-08 17:21:09,208 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 17:21:09,210 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 17:21:09,210 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 17:21:09,210 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 17:21:09,218 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:21:09" (1/1) ... [2024-11-08 17:21:09,232 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:21:09" (1/1) ... [2024-11-08 17:21:09,270 INFO L138 Inliner]: procedures = 23, calls = 35, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 183 [2024-11-08 17:21:09,274 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 17:21:09,275 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 17:21:09,275 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 17:21:09,276 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 17:21:09,288 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:21:09" (1/1) ... [2024-11-08 17:21:09,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:21:09" (1/1) ... [2024-11-08 17:21:09,295 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:21:09" (1/1) ... [2024-11-08 17:21:09,330 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-08 17:21:09,331 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:21:09" (1/1) ... [2024-11-08 17:21:09,331 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:21:09" (1/1) ... [2024-11-08 17:21:09,343 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:21:09" (1/1) ... [2024-11-08 17:21:09,352 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:21:09" (1/1) ... [2024-11-08 17:21:09,353 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:21:09" (1/1) ... [2024-11-08 17:21:09,359 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:21:09" (1/1) ... [2024-11-08 17:21:09,362 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 17:21:09,365 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 17:21:09,365 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 17:21:09,366 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 17:21:09,367 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:21:09" (1/1) ... [2024-11-08 17:21:09,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:21:09,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:21:09,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 17:21:09,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 17:21:09,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 17:21:09,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 17:21:09,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 17:21:09,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 17:21:09,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 17:21:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 17:21:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 17:21:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 17:21:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 17:21:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 17:21:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 17:21:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 17:21:09,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 17:21:09,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 17:21:09,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 17:21:09,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 17:21:09,451 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 17:21:09,581 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 17:21:09,583 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 17:21:09,964 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 17:21:09,964 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 17:21:10,329 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 17:21:10,329 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 17:21:10,329 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:21:10 BoogieIcfgContainer [2024-11-08 17:21:10,330 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 17:21:10,333 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 17:21:10,333 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 17:21:10,336 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 17:21:10,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 05:21:08" (1/3) ... [2024-11-08 17:21:10,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18375d68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:21:10, skipping insertion in model container [2024-11-08 17:21:10,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:21:09" (2/3) ... [2024-11-08 17:21:10,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18375d68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:21:10, skipping insertion in model container [2024-11-08 17:21:10,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:21:10" (3/3) ... [2024-11-08 17:21:10,340 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2024-11-08 17:21:10,361 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 17:21:10,361 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 17:21:10,362 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 17:21:10,425 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-08 17:21:10,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 43 transitions, 100 flow [2024-11-08 17:21:10,504 INFO L124 PetriNetUnfolderBase]: 9/41 cut-off events. [2024-11-08 17:21:10,505 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 17:21:10,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 9/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 62 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-08 17:21:10,508 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 43 transitions, 100 flow [2024-11-08 17:21:10,511 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 40 transitions, 92 flow [2024-11-08 17:21:10,521 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:21:10,528 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;@41e18119, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:21:10,528 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-08 17:21:10,541 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 17:21:10,541 INFO L124 PetriNetUnfolderBase]: 9/39 cut-off events. [2024-11-08 17:21:10,541 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 17:21:10,542 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:21:10,542 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] [2024-11-08 17:21:10,543 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:21:10,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:21:10,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1456750202, now seen corresponding path program 1 times [2024-11-08 17:21:10,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:21:10,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519750016] [2024-11-08 17:21:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:21:10,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:21:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:21:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:21:11,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:21:11,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519750016] [2024-11-08 17:21:11,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519750016] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:21:11,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:21:11,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:21:11,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094491477] [2024-11-08 17:21:11,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:21:11,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:21:11,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:21:11,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:21:11,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:21:11,144 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-11-08 17:21:11,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 40 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-08 17:21:11,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:21:11,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-11-08 17:21:11,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:21:11,345 INFO L124 PetriNetUnfolderBase]: 274/479 cut-off events. [2024-11-08 17:21:11,345 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-08 17:21:11,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 479 events. 274/479 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2089 event pairs, 63 based on Foata normal form. 0/389 useless extension candidates. Maximal degree in co-relation 873. Up to 250 conditions per place. [2024-11-08 17:21:11,352 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 35 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2024-11-08 17:21:11,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 53 transitions, 197 flow [2024-11-08 17:21:11,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:21:11,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:21:11,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-11-08 17:21:11,366 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-11-08 17:21:11,368 INFO L175 Difference]: Start difference. First operand has 38 places, 40 transitions, 92 flow. Second operand 4 states and 108 transitions. [2024-11-08 17:21:11,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 53 transitions, 197 flow [2024-11-08 17:21:11,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 53 transitions, 187 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 17:21:11,375 INFO L231 Difference]: Finished difference. Result has 38 places, 41 transitions, 100 flow [2024-11-08 17:21:11,377 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=41} [2024-11-08 17:21:11,381 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2024-11-08 17:21:11,382 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 41 transitions, 100 flow [2024-11-08 17:21:11,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-08 17:21:11,382 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:21:11,382 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] [2024-11-08 17:21:11,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 17:21:11,383 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:21:11,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:21:11,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1127593681, now seen corresponding path program 1 times [2024-11-08 17:21:11,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:21:11,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629922380] [2024-11-08 17:21:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:21:11,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:21:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:21:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:21:11,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:21:11,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629922380] [2024-11-08 17:21:11,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629922380] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:21:11,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:21:11,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:21:11,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560244311] [2024-11-08 17:21:11,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:21:11,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:21:11,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:21:11,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:21:11,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:21:11,626 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-11-08 17:21:11,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 41 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-08 17:21:11,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:21:11,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-11-08 17:21:11,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:21:11,811 INFO L124 PetriNetUnfolderBase]: 235/470 cut-off events. [2024-11-08 17:21:11,812 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-08 17:21:11,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 860 conditions, 470 events. 235/470 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2111 event pairs, 126 based on Foata normal form. 1/379 useless extension candidates. Maximal degree in co-relation 316. Up to 324 conditions per place. [2024-11-08 17:21:11,820 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 26 selfloop transitions, 2 changer transitions 2/44 dead transitions. [2024-11-08 17:21:11,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 44 transitions, 166 flow [2024-11-08 17:21:11,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:21:11,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:21:11,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-11-08 17:21:11,822 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2024-11-08 17:21:11,839 INFO L175 Difference]: Start difference. First operand has 38 places, 41 transitions, 100 flow. Second operand 4 states and 94 transitions. [2024-11-08 17:21:11,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 44 transitions, 166 flow [2024-11-08 17:21:11,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 44 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:21:11,841 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 112 flow [2024-11-08 17:21:11,842 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2024-11-08 17:21:11,842 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2024-11-08 17:21:11,843 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 112 flow [2024-11-08 17:21:11,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-08 17:21:11,843 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:21:11,843 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] [2024-11-08 17:21:11,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 17:21:11,844 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:21:11,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:21:11,845 INFO L85 PathProgramCache]: Analyzing trace with hash -314050231, now seen corresponding path program 1 times [2024-11-08 17:21:11,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:21:11,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145341707] [2024-11-08 17:21:11,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:21:11,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:21:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:21:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:21:12,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:21:12,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145341707] [2024-11-08 17:21:12,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145341707] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:21:12,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:21:12,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:21:12,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289875744] [2024-11-08 17:21:12,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:21:12,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:21:12,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:21:12,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:21:12,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:21:12,098 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-11-08 17:21:12,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2024-11-08 17:21:12,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:21:12,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-11-08 17:21:12,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:21:12,246 INFO L124 PetriNetUnfolderBase]: 292/585 cut-off events. [2024-11-08 17:21:12,247 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-08 17:21:12,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 585 events. 292/585 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2766 event pairs, 94 based on Foata normal form. 1/484 useless extension candidates. Maximal degree in co-relation 1058. Up to 216 conditions per place. [2024-11-08 17:21:12,253 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 35 selfloop transitions, 2 changer transitions 1/56 dead transitions. [2024-11-08 17:21:12,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 56 transitions, 222 flow [2024-11-08 17:21:12,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:21:12,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:21:12,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-11-08 17:21:12,257 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7441860465116279 [2024-11-08 17:21:12,258 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 112 flow. Second operand 3 states and 96 transitions. [2024-11-08 17:21:12,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 56 transitions, 222 flow [2024-11-08 17:21:12,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 218 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-08 17:21:12,261 INFO L231 Difference]: Finished difference. Result has 41 places, 43 transitions, 120 flow [2024-11-08 17:21:12,261 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=41, PETRI_TRANSITIONS=43} [2024-11-08 17:21:12,263 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2024-11-08 17:21:12,264 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 43 transitions, 120 flow [2024-11-08 17:21:12,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2024-11-08 17:21:12,264 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:21:12,264 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, 1] [2024-11-08 17:21:12,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 17:21:12,265 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:21:12,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:21:12,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1837085553, now seen corresponding path program 1 times [2024-11-08 17:21:12,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:21:12,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829654640] [2024-11-08 17:21:12,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:21:12,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:21:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:21:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:21:12,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:21:12,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829654640] [2024-11-08 17:21:12,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829654640] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:21:12,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:21:12,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:21:12,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158731697] [2024-11-08 17:21:12,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:21:12,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:21:12,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:21:12,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:21:12,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:21:12,414 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-11-08 17:21:12,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 43 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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) [2024-11-08 17:21:12,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:21:12,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-11-08 17:21:12,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:21:12,582 INFO L124 PetriNetUnfolderBase]: 285/581 cut-off events. [2024-11-08 17:21:12,585 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-08 17:21:12,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1164 conditions, 581 events. 285/581 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2758 event pairs, 102 based on Foata normal form. 10/512 useless extension candidates. Maximal degree in co-relation 1135. Up to 314 conditions per place. [2024-11-08 17:21:12,590 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 35 selfloop transitions, 2 changer transitions 1/56 dead transitions. [2024-11-08 17:21:12,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 56 transitions, 229 flow [2024-11-08 17:21:12,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:21:12,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:21:12,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-11-08 17:21:12,593 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7364341085271318 [2024-11-08 17:21:12,595 INFO L175 Difference]: Start difference. First operand has 41 places, 43 transitions, 120 flow. Second operand 3 states and 95 transitions. [2024-11-08 17:21:12,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 56 transitions, 229 flow [2024-11-08 17:21:12,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 56 transitions, 227 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:21:12,598 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 130 flow [2024-11-08 17:21:12,599 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2024-11-08 17:21:12,600 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2024-11-08 17:21:12,602 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 130 flow [2024-11-08 17:21:12,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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) [2024-11-08 17:21:12,603 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:21:12,603 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, 1, 1, 1] [2024-11-08 17:21:12,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 17:21:12,604 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:21:12,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:21:12,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1026984292, now seen corresponding path program 1 times [2024-11-08 17:21:12,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:21:12,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033312560] [2024-11-08 17:21:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:21:12,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:21:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:21:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:21:12,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:21:12,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033312560] [2024-11-08 17:21:12,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033312560] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:21:12,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:21:12,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:21:12,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805156390] [2024-11-08 17:21:12,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:21:12,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:21:12,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:21:12,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:21:12,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:21:12,866 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-11-08 17:21:12,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2024-11-08 17:21:12,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:21:12,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-11-08 17:21:12,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:21:13,059 INFO L124 PetriNetUnfolderBase]: 352/738 cut-off events. [2024-11-08 17:21:13,059 INFO L125 PetriNetUnfolderBase]: For 68/89 co-relation queries the response was YES. [2024-11-08 17:21:13,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1544 conditions, 738 events. 352/738 cut-off events. For 68/89 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3707 event pairs, 247 based on Foata normal form. 12/645 useless extension candidates. Maximal degree in co-relation 1190. Up to 437 conditions per place. [2024-11-08 17:21:13,064 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 29 selfloop transitions, 2 changer transitions 21/66 dead transitions. [2024-11-08 17:21:13,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 66 transitions, 298 flow [2024-11-08 17:21:13,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:21:13,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:21:13,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-11-08 17:21:13,066 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5906976744186047 [2024-11-08 17:21:13,067 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 130 flow. Second operand 5 states and 127 transitions. [2024-11-08 17:21:13,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 66 transitions, 298 flow [2024-11-08 17:21:13,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 66 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:21:13,069 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 146 flow [2024-11-08 17:21:13,070 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=146, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2024-11-08 17:21:13,071 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2024-11-08 17:21:13,071 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 146 flow [2024-11-08 17:21:13,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2024-11-08 17:21:13,071 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:21:13,072 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, 1, 1, 1, 1, 1] [2024-11-08 17:21:13,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 17:21:13,072 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:21:13,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:21:13,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1154952764, now seen corresponding path program 1 times [2024-11-08 17:21:13,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:21:13,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342123734] [2024-11-08 17:21:13,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:21:13,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:21:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:21:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:21:14,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:21:14,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342123734] [2024-11-08 17:21:14,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342123734] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:21:14,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29656887] [2024-11-08 17:21:14,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:21:14,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:21:14,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:21:14,683 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:21:14,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 17:21:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:21:14,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-08 17:21:14,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:21:14,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-08 17:21:15,037 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 [2024-11-08 17:21:15,145 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:21:15,146 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 11 treesize of output 11 [2024-11-08 17:21:15,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 17:21:15,933 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-11-08 17:21:15,934 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 34 treesize of output 10 [2024-11-08 17:21:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:21:16,044 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:21:18,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:21:18,309 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 66 [2024-11-08 17:21:18,366 INFO L349 Elim1Store]: treesize reduction 9, result has 80.9 percent of original size [2024-11-08 17:21:18,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 181 [2024-11-08 17:21:18,400 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 17:21:18,416 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:21:18,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 136 treesize of output 120 [2024-11-08 17:21:18,680 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:21:18,681 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2024-11-08 17:21:18,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:21:18,725 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 102 treesize of output 90 [2024-11-08 17:21:18,744 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:21:18,745 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 70 treesize of output 63 [2024-11-08 17:21:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:21:19,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29656887] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:21:19,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:21:19,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 39 [2024-11-08 17:21:19,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319266894] [2024-11-08 17:21:19,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:21:19,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-08 17:21:19,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:21:19,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-08 17:21:19,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1261, Unknown=5, NotChecked=0, Total=1560 [2024-11-08 17:21:24,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:21:28,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:21:33,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:21:33,061 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 43 [2024-11-08 17:21:33,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 146 flow. Second operand has 40 states, 40 states have (on average 7.4) internal successors, (296), 40 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:21:33,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:21:33,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 43 [2024-11-08 17:21:33,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:21:37,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:21:39,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:21:46,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:21:48,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:22:02,296 INFO L124 PetriNetUnfolderBase]: 3659/5958 cut-off events. [2024-11-08 17:22:02,296 INFO L125 PetriNetUnfolderBase]: For 736/736 co-relation queries the response was YES. [2024-11-08 17:22:02,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13556 conditions, 5958 events. 3659/5958 cut-off events. For 736/736 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 32270 event pairs, 479 based on Foata normal form. 48/5216 useless extension candidates. Maximal degree in co-relation 13535. Up to 991 conditions per place. [2024-11-08 17:22:02,333 INFO L140 encePairwiseOnDemand]: 16/43 looper letters, 335 selfloop transitions, 144 changer transitions 194/676 dead transitions. [2024-11-08 17:22:02,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 676 transitions, 3165 flow [2024-11-08 17:22:02,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-08 17:22:02,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2024-11-08 17:22:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 1038 transitions. [2024-11-08 17:22:02,339 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3306785600509716 [2024-11-08 17:22:02,340 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 146 flow. Second operand 73 states and 1038 transitions. [2024-11-08 17:22:02,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 676 transitions, 3165 flow [2024-11-08 17:22:02,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 676 transitions, 3149 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-11-08 17:22:02,354 INFO L231 Difference]: Finished difference. Result has 163 places, 199 transitions, 1394 flow [2024-11-08 17:22:02,355 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=1394, PETRI_PLACES=163, PETRI_TRANSITIONS=199} [2024-11-08 17:22:02,356 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 125 predicate places. [2024-11-08 17:22:02,356 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 199 transitions, 1394 flow [2024-11-08 17:22:02,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 7.4) internal successors, (296), 40 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:22:02,357 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:22:02,357 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:22:02,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 17:22:02,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:22:02,566 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:22:02,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:22:02,567 INFO L85 PathProgramCache]: Analyzing trace with hash 858712396, now seen corresponding path program 2 times [2024-11-08 17:22:02,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:22:02,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401954942] [2024-11-08 17:22:02,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:22:02,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:22:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:22:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:22:05,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:22:05,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401954942] [2024-11-08 17:22:05,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401954942] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:22:05,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835911943] [2024-11-08 17:22:05,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:22:05,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:22:05,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:22:05,446 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:22:05,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 17:22:05,588 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:22:05,588 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:22:05,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-08 17:22:05,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:22:06,561 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-11-08 17:22:06,562 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 34 treesize of output 10 [2024-11-08 17:22:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:22:06,678 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:22:11,974 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:22:11,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 174 [2024-11-08 17:22:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 17:22:14,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835911943] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:22:14,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:22:14,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 31 [2024-11-08 17:22:14,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388006426] [2024-11-08 17:22:14,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:22:14,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-08 17:22:14,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:22:14,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-08 17:22:14,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=835, Unknown=1, NotChecked=0, Total=992 [2024-11-08 17:22:18,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:22:22,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:22:27,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:22:27,226 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 43 [2024-11-08 17:22:27,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 199 transitions, 1394 flow. Second operand has 32 states, 32 states have (on average 8.125) internal successors, (260), 32 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:22:27,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:22:27,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 43 [2024-11-08 17:22:27,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:22:31,903 INFO L124 PetriNetUnfolderBase]: 4320/7087 cut-off events. [2024-11-08 17:22:31,903 INFO L125 PetriNetUnfolderBase]: For 76657/76657 co-relation queries the response was YES. [2024-11-08 17:22:31,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36632 conditions, 7087 events. 4320/7087 cut-off events. For 76657/76657 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 38982 event pairs, 394 based on Foata normal form. 2/7080 useless extension candidates. Maximal degree in co-relation 36523. Up to 1763 conditions per place. [2024-11-08 17:22:32,021 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 397 selfloop transitions, 110 changer transitions 36/546 dead transitions. [2024-11-08 17:22:32,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 546 transitions, 5633 flow [2024-11-08 17:22:32,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-08 17:22:32,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-08 17:22:32,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 332 transitions. [2024-11-08 17:22:32,028 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3356926188068756 [2024-11-08 17:22:32,028 INFO L175 Difference]: Start difference. First operand has 163 places, 199 transitions, 1394 flow. Second operand 23 states and 332 transitions. [2024-11-08 17:22:32,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 546 transitions, 5633 flow [2024-11-08 17:22:32,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 546 transitions, 4835 flow, removed 391 selfloop flow, removed 12 redundant places. [2024-11-08 17:22:32,490 INFO L231 Difference]: Finished difference. Result has 172 places, 288 transitions, 2254 flow [2024-11-08 17:22:32,490 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2254, PETRI_PLACES=172, PETRI_TRANSITIONS=288} [2024-11-08 17:22:32,491 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 134 predicate places. [2024-11-08 17:22:32,491 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 288 transitions, 2254 flow [2024-11-08 17:22:32,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 8.125) internal successors, (260), 32 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:22:32,492 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:22:32,492 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1] [2024-11-08 17:22:32,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 17:22:32,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-08 17:22:32,697 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:22:32,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:22:32,698 INFO L85 PathProgramCache]: Analyzing trace with hash -735134622, now seen corresponding path program 3 times [2024-11-08 17:22:32,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:22:32,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175076361] [2024-11-08 17:22:32,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:22:32,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:22:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:22:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 17:22:32,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:22:32,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175076361] [2024-11-08 17:22:32,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175076361] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:22:32,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:22:32,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:22:32,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842296103] [2024-11-08 17:22:32,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:22:32,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:22:32,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:22:32,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:22:32,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:22:32,842 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-11-08 17:22:32,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 288 transitions, 2254 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2024-11-08 17:22:32,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:22:32,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-11-08 17:22:32,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:22:34,285 INFO L124 PetriNetUnfolderBase]: 3146/6354 cut-off events. [2024-11-08 17:22:34,285 INFO L125 PetriNetUnfolderBase]: For 48955/49266 co-relation queries the response was YES. [2024-11-08 17:22:34,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29759 conditions, 6354 events. 3146/6354 cut-off events. For 48955/49266 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 45627 event pairs, 571 based on Foata normal form. 97/6324 useless extension candidates. Maximal degree in co-relation 29687. Up to 2220 conditions per place. [2024-11-08 17:22:34,347 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 344 selfloop transitions, 79 changer transitions 0/468 dead transitions. [2024-11-08 17:22:34,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 468 transitions, 4466 flow [2024-11-08 17:22:34,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:22:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:22:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-11-08 17:22:34,353 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7790697674418605 [2024-11-08 17:22:34,353 INFO L175 Difference]: Start difference. First operand has 172 places, 288 transitions, 2254 flow. Second operand 4 states and 134 transitions. [2024-11-08 17:22:34,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 468 transitions, 4466 flow [2024-11-08 17:22:34,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 468 transitions, 4375 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-11-08 17:22:34,519 INFO L231 Difference]: Finished difference. Result has 169 places, 343 transitions, 3012 flow [2024-11-08 17:22:34,520 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2119, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3012, PETRI_PLACES=169, PETRI_TRANSITIONS=343} [2024-11-08 17:22:34,520 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 131 predicate places. [2024-11-08 17:22:34,521 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 343 transitions, 3012 flow [2024-11-08 17:22:34,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2024-11-08 17:22:34,521 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:22:34,521 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2024-11-08 17:22:34,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 17:22:34,522 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:22:34,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:22:34,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1230911701, now seen corresponding path program 1 times [2024-11-08 17:22:34,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:22:34,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822691337] [2024-11-08 17:22:34,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:22:34,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:22:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:22:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 17:22:34,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:22:34,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822691337] [2024-11-08 17:22:34,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822691337] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:22:34,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081678237] [2024-11-08 17:22:34,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:22:34,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:22:34,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:22:34,710 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:22:34,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 17:22:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:22:34,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 17:22:34,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:22:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 17:22:34,941 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:22:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 17:22:35,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081678237] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:22:35,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:22:35,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-08 17:22:35,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449211294] [2024-11-08 17:22:35,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:22:35,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 17:22:35,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:22:35,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 17:22:35,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-08 17:22:35,149 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-11-08 17:22:35,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 343 transitions, 3012 flow. Second operand has 15 states, 15 states have (on average 15.133333333333333) internal successors, (227), 15 states have internal predecessors, (227), 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) [2024-11-08 17:22:35,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:22:35,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-11-08 17:22:35,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:22:36,599 INFO L124 PetriNetUnfolderBase]: 3211/6178 cut-off events. [2024-11-08 17:22:36,599 INFO L125 PetriNetUnfolderBase]: For 43337/43604 co-relation queries the response was YES. [2024-11-08 17:22:36,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29216 conditions, 6178 events. 3211/6178 cut-off events. For 43337/43604 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 40865 event pairs, 418 based on Foata normal form. 106/6163 useless extension candidates. Maximal degree in co-relation 29078. Up to 3181 conditions per place. [2024-11-08 17:22:36,654 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 313 selfloop transitions, 35 changer transitions 114/479 dead transitions. [2024-11-08 17:22:36,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 479 transitions, 5122 flow [2024-11-08 17:22:36,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 17:22:36,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-08 17:22:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 234 transitions. [2024-11-08 17:22:36,656 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-11-08 17:22:36,657 INFO L175 Difference]: Start difference. First operand has 169 places, 343 transitions, 3012 flow. Second operand 13 states and 234 transitions. [2024-11-08 17:22:36,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 479 transitions, 5122 flow [2024-11-08 17:22:36,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 479 transitions, 5006 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-11-08 17:22:36,837 INFO L231 Difference]: Finished difference. Result has 184 places, 299 transitions, 2667 flow [2024-11-08 17:22:36,838 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2742, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2667, PETRI_PLACES=184, PETRI_TRANSITIONS=299} [2024-11-08 17:22:36,839 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 146 predicate places. [2024-11-08 17:22:36,839 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 299 transitions, 2667 flow [2024-11-08 17:22:36,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 15.133333333333333) internal successors, (227), 15 states have internal predecessors, (227), 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) [2024-11-08 17:22:36,839 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:22:36,840 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, 1, 1, 1, 1] [2024-11-08 17:22:36,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 17:22:37,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-08 17:22:37,041 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:22:37,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:22:37,041 INFO L85 PathProgramCache]: Analyzing trace with hash 476119941, now seen corresponding path program 2 times [2024-11-08 17:22:37,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:22:37,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032634102] [2024-11-08 17:22:37,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:22:37,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:22:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:22:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-08 17:22:37,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:22:37,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032634102] [2024-11-08 17:22:37,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032634102] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:22:37,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:22:37,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 17:22:37,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571963365] [2024-11-08 17:22:37,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:22:37,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:22:37,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:22:37,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:22:37,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:22:37,455 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-11-08 17:22:37,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 299 transitions, 2667 flow. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 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) [2024-11-08 17:22:37,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:22:37,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-11-08 17:22:37,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:22:38,349 INFO L124 PetriNetUnfolderBase]: 1734/3426 cut-off events. [2024-11-08 17:22:38,349 INFO L125 PetriNetUnfolderBase]: For 29038/29217 co-relation queries the response was YES. [2024-11-08 17:22:38,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16672 conditions, 3426 events. 1734/3426 cut-off events. For 29038/29217 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 19893 event pairs, 263 based on Foata normal form. 31/3354 useless extension candidates. Maximal degree in co-relation 16613. Up to 2502 conditions per place. [2024-11-08 17:22:38,387 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 210 selfloop transitions, 19 changer transitions 0/268 dead transitions. [2024-11-08 17:22:38,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 268 transitions, 2753 flow [2024-11-08 17:22:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:22:38,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:22:38,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-11-08 17:22:38,389 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6162790697674418 [2024-11-08 17:22:38,389 INFO L175 Difference]: Start difference. First operand has 184 places, 299 transitions, 2667 flow. Second operand 6 states and 159 transitions. [2024-11-08 17:22:38,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 268 transitions, 2753 flow [2024-11-08 17:22:38,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 268 transitions, 2632 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-11-08 17:22:38,476 INFO L231 Difference]: Finished difference. Result has 166 places, 259 transitions, 2212 flow [2024-11-08 17:22:38,476 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2083, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2212, PETRI_PLACES=166, PETRI_TRANSITIONS=259} [2024-11-08 17:22:38,477 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 128 predicate places. [2024-11-08 17:22:38,477 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 259 transitions, 2212 flow [2024-11-08 17:22:38,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 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) [2024-11-08 17:22:38,477 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:22:38,478 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:22:38,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 17:22:38,478 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:22:38,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:22:38,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1165419682, now seen corresponding path program 4 times [2024-11-08 17:22:38,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:22:38,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124527920] [2024-11-08 17:22:38,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:22:38,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:22:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:22:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 17:22:38,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:22:38,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124527920] [2024-11-08 17:22:38,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124527920] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:22:38,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948821884] [2024-11-08 17:22:38,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 17:22:38,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:22:38,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:22:38,787 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:22:38,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 17:22:38,915 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 17:22:38,915 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:22:38,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 17:22:38,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:22:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 17:22:39,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:22:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 17:22:39,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948821884] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:22:39,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:22:39,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-08 17:22:39,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29914518] [2024-11-08 17:22:39,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:22:39,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:22:39,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:22:39,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:22:39,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:22:39,443 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-11-08 17:22:39,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 259 transitions, 2212 flow. Second operand has 12 states, 12 states have (on average 18.833333333333332) internal successors, (226), 12 states have internal predecessors, (226), 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) [2024-11-08 17:22:39,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:22:39,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-11-08 17:22:39,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:22:40,020 INFO L124 PetriNetUnfolderBase]: 916/1981 cut-off events. [2024-11-08 17:22:40,020 INFO L125 PetriNetUnfolderBase]: For 17351/17442 co-relation queries the response was YES. [2024-11-08 17:22:40,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9446 conditions, 1981 events. 916/1981 cut-off events. For 17351/17442 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 10825 event pairs, 430 based on Foata normal form. 15/1972 useless extension candidates. Maximal degree in co-relation 9391. Up to 1172 conditions per place. [2024-11-08 17:22:40,037 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 64 selfloop transitions, 12 changer transitions 84/173 dead transitions. [2024-11-08 17:22:40,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 173 transitions, 1825 flow [2024-11-08 17:22:40,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:22:40,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 17:22:40,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-11-08 17:22:40,039 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-11-08 17:22:40,039 INFO L175 Difference]: Start difference. First operand has 166 places, 259 transitions, 2212 flow. Second operand 8 states and 168 transitions. [2024-11-08 17:22:40,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 173 transitions, 1825 flow [2024-11-08 17:22:40,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 173 transitions, 1727 flow, removed 37 selfloop flow, removed 10 redundant places. [2024-11-08 17:22:40,077 INFO L231 Difference]: Finished difference. Result has 145 places, 88 transitions, 772 flow [2024-11-08 17:22:40,077 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=772, PETRI_PLACES=145, PETRI_TRANSITIONS=88} [2024-11-08 17:22:40,078 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 107 predicate places. [2024-11-08 17:22:40,078 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 88 transitions, 772 flow [2024-11-08 17:22:40,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.833333333333332) internal successors, (226), 12 states have internal predecessors, (226), 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) [2024-11-08 17:22:40,078 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:22:40,078 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:22:40,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 17:22:40,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-08 17:22:40,279 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:22:40,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:22:40,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1761989908, now seen corresponding path program 5 times [2024-11-08 17:22:40,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:22:40,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500643477] [2024-11-08 17:22:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:22:40,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:22:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:22:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 17:22:43,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:22:43,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500643477] [2024-11-08 17:22:43,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500643477] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:22:43,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137648987] [2024-11-08 17:22:43,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 17:22:43,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:22:43,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:22:43,206 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:22:43,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 17:22:43,310 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-08 17:22:43,310 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:22:43,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-08 17:22:43,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:22:53,149 INFO L349 Elim1Store]: treesize reduction 41, result has 54.9 percent of original size [2024-11-08 17:22:53,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 65 [2024-11-08 17:22:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 17:22:53,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:22:57,160 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:22:57,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 237 treesize of output 1261 [2024-11-08 17:26:25,275 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-08 17:26:25,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-11-08 17:26:25,277 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-08 17:26:25,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 17:26:25,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-08 17:26:25,478 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:324) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:180) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 68 more [2024-11-08 17:26:25,484 INFO L158 Benchmark]: Toolchain (without parser) took 316671.33ms. Allocated memory was 130.0MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 91.9MB in the beginning and 335.4MB in the end (delta: -243.6MB). Peak memory consumption was 912.3MB. Max. memory is 16.1GB. [2024-11-08 17:26:25,484 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 130.0MB. Free memory is still 73.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-08 17:26:25,484 INFO L158 Benchmark]: CACSL2BoogieTranslator took 393.87ms. Allocated memory is still 130.0MB. Free memory was 91.9MB in the beginning and 77.9MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-11-08 17:26:25,485 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.23ms. Allocated memory is still 130.0MB. Free memory was 77.9MB in the beginning and 75.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-08 17:26:25,485 INFO L158 Benchmark]: Boogie Preprocessor took 86.63ms. Allocated memory is still 130.0MB. Free memory was 75.8MB in the beginning and 73.0MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-08 17:26:25,485 INFO L158 Benchmark]: RCFGBuilder took 964.55ms. Allocated memory was 130.0MB in the beginning and 167.8MB in the end (delta: 37.7MB). Free memory was 73.0MB in the beginning and 102.4MB in the end (delta: -29.4MB). Peak memory consumption was 29.1MB. Max. memory is 16.1GB. [2024-11-08 17:26:25,486 INFO L158 Benchmark]: TraceAbstraction took 315150.42ms. Allocated memory was 167.8MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 102.4MB in the beginning and 335.4MB in the end (delta: -233.0MB). Peak memory consumption was 883.2MB. Max. memory is 16.1GB. [2024-11-08 17:26:25,488 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 130.0MB. Free memory is still 73.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 393.87ms. Allocated memory is still 130.0MB. Free memory was 91.9MB in the beginning and 77.9MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.23ms. Allocated memory is still 130.0MB. Free memory was 77.9MB in the beginning and 75.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 86.63ms. Allocated memory is still 130.0MB. Free memory was 75.8MB in the beginning and 73.0MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 964.55ms. Allocated memory was 130.0MB in the beginning and 167.8MB in the end (delta: 37.7MB). Free memory was 73.0MB in the beginning and 102.4MB in the end (delta: -29.4MB). Peak memory consumption was 29.1MB. Max. memory is 16.1GB. * TraceAbstraction took 315150.42ms. Allocated memory was 167.8MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 102.4MB in the beginning and 335.4MB in the end (delta: -233.0MB). Peak memory consumption was 883.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX --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 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 17:26:28,307 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 17:26:28,385 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-08 17:26:28,391 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 17:26:28,391 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 17:26:28,439 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 17:26:28,440 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 17:26:28,443 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 17:26:28,444 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 17:26:28,445 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 17:26:28,445 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 17:26:28,446 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 17:26:28,447 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 17:26:28,453 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 17:26:28,453 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 17:26:28,454 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 17:26:28,454 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 17:26:28,455 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 17:26:28,455 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 17:26:28,455 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 17:26:28,456 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 17:26:28,456 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 17:26:28,459 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 17:26:28,460 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 17:26:28,460 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-08 17:26:28,461 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 17:26:28,461 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-08 17:26:28,461 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 17:26:28,462 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 17:26:28,462 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 17:26:28,462 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 17:26:28,463 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 17:26:28,463 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 17:26:28,463 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 17:26:28,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:26:28,464 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 17:26:28,464 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 17:26:28,465 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 17:26:28,465 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-08 17:26:28,466 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-08 17:26:28,467 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 17:26:28,468 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 17:26:28,468 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 17:26:28,469 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 17:26:28,469 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_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b [2024-11-08 17:26:28,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 17:26:28,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 17:26:28,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 17:26:28,981 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 17:26:28,982 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 17:26:28,984 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c Unable to find full path for "g++" [2024-11-08 17:26:31,173 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 17:26:31,452 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 17:26:31,454 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2024-11-08 17:26:31,464 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/data/96af92d46/5a26eef66e44433286d0e161d6c5ebad/FLAG69226ff2d [2024-11-08 17:26:31,485 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/data/96af92d46/5a26eef66e44433286d0e161d6c5ebad [2024-11-08 17:26:31,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 17:26:31,490 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 17:26:31,491 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 17:26:31,491 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 17:26:31,498 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 17:26:31,498 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:26:31" (1/1) ... [2024-11-08 17:26:31,499 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70abb033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:26:31, skipping insertion in model container [2024-11-08 17:26:31,500 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:26:31" (1/1) ... [2024-11-08 17:26:31,533 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 17:26:31,759 WARN L250 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_1aa54873-3766-49ea-9de9-068fc1bf1ef2/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2950,2963] [2024-11-08 17:26:31,768 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 17:26:31,771 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:26:31,791 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 17:26:31,821 WARN L250 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_1aa54873-3766-49ea-9de9-068fc1bf1ef2/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2950,2963] [2024-11-08 17:26:31,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:26:31,851 INFO L204 MainTranslator]: Completed translation [2024-11-08 17:26:31,852 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:26:31 WrapperNode [2024-11-08 17:26:31,852 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 17:26:31,853 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 17:26:31,853 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 17:26:31,853 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 17:26:31,860 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:26:31" (1/1) ... [2024-11-08 17:26:31,873 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:26:31" (1/1) ... [2024-11-08 17:26:31,911 INFO L138 Inliner]: procedures = 25, calls = 35, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 178 [2024-11-08 17:26:31,913 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 17:26:31,914 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 17:26:31,914 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 17:26:31,914 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 17:26:31,927 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:26:31" (1/1) ... [2024-11-08 17:26:31,927 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:26:31" (1/1) ... [2024-11-08 17:26:31,961 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:26:31" (1/1) ... [2024-11-08 17:26:31,995 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-08 17:26:31,996 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:26:31" (1/1) ... [2024-11-08 17:26:31,996 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:26:31" (1/1) ... [2024-11-08 17:26:32,012 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:26:31" (1/1) ... [2024-11-08 17:26:32,020 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:26:31" (1/1) ... [2024-11-08 17:26:32,039 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:26:31" (1/1) ... [2024-11-08 17:26:32,040 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:26:31" (1/1) ... [2024-11-08 17:26:32,047 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 17:26:32,051 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 17:26:32,051 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 17:26:32,051 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 17:26:32,052 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:26:31" (1/1) ... [2024-11-08 17:26:32,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:26:32,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:26:32,096 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 17:26:32,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 17:26:32,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 17:26:32,139 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 17:26:32,139 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 17:26:32,139 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 17:26:32,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 17:26:32,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-08 17:26:32,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-08 17:26:32,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 17:26:32,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 17:26:32,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 17:26:32,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-08 17:26:32,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-08 17:26:32,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 17:26:32,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 17:26:32,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-08 17:26:32,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-08 17:26:32,147 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 17:26:32,320 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 17:26:32,323 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 17:26:32,779 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 17:26:32,781 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 17:26:33,122 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 17:26:33,122 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 17:26:33,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:26:33 BoogieIcfgContainer [2024-11-08 17:26:33,123 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 17:26:33,125 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 17:26:33,126 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 17:26:33,129 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 17:26:33,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 05:26:31" (1/3) ... [2024-11-08 17:26:33,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5add76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:26:33, skipping insertion in model container [2024-11-08 17:26:33,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:26:31" (2/3) ... [2024-11-08 17:26:33,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5add76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:26:33, skipping insertion in model container [2024-11-08 17:26:33,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:26:33" (3/3) ... [2024-11-08 17:26:33,132 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2024-11-08 17:26:33,150 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 17:26:33,150 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 17:26:33,150 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 17:26:33,201 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-08 17:26:33,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 43 transitions, 100 flow [2024-11-08 17:26:33,279 INFO L124 PetriNetUnfolderBase]: 9/41 cut-off events. [2024-11-08 17:26:33,279 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 17:26:33,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 9/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 62 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-08 17:26:33,283 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 43 transitions, 100 flow [2024-11-08 17:26:33,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 40 transitions, 92 flow [2024-11-08 17:26:33,295 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:26:33,301 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;@136c7f6d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:26:33,301 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-08 17:26:33,319 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 17:26:33,320 INFO L124 PetriNetUnfolderBase]: 9/39 cut-off events. [2024-11-08 17:26:33,320 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 17:26:33,320 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:26:33,321 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] [2024-11-08 17:26:33,323 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:26:33,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:26:33,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1527200506, now seen corresponding path program 1 times [2024-11-08 17:26:33,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:26:33,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551984909] [2024-11-08 17:26:33,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:26:33,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:26:33,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:26:33,352 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:26:33,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 17:26:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:26:33,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-08 17:26:33,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:26:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:26:33,551 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:26:33,551 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:26:33,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551984909] [2024-11-08 17:26:33,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551984909] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:26:33,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:26:33,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:26:33,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398155866] [2024-11-08 17:26:33,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:26:33,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:26:33,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:26:33,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:26:33,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:26:33,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-11-08 17:26:33,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:26:33,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:26:33,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-11-08 17:26:33,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:26:33,803 INFO L124 PetriNetUnfolderBase]: 203/409 cut-off events. [2024-11-08 17:26:33,804 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-08 17:26:33,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 409 events. 203/409 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1788 event pairs, 57 based on Foata normal form. 1/322 useless extension candidates. Maximal degree in co-relation 653. Up to 144 conditions per place. [2024-11-08 17:26:33,810 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 32 selfloop transitions, 2 changer transitions 1/53 dead transitions. [2024-11-08 17:26:33,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 194 flow [2024-11-08 17:26:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:26:33,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:26:33,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-11-08 17:26:33,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7441860465116279 [2024-11-08 17:26:33,826 INFO L175 Difference]: Start difference. First operand has 38 places, 40 transitions, 92 flow. Second operand 3 states and 96 transitions. [2024-11-08 17:26:33,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 194 flow [2024-11-08 17:26:33,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 17:26:33,834 INFO L231 Difference]: Finished difference. Result has 37 places, 41 transitions, 96 flow [2024-11-08 17:26:33,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=37, PETRI_TRANSITIONS=41} [2024-11-08 17:26:33,840 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2024-11-08 17:26:33,840 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 41 transitions, 96 flow [2024-11-08 17:26:33,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:26:33,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:26:33,841 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] [2024-11-08 17:26:33,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 17:26:34,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:26:34,042 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:26:34,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:26:34,044 INFO L85 PathProgramCache]: Analyzing trace with hash -741875206, now seen corresponding path program 1 times [2024-11-08 17:26:34,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:26:34,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638531768] [2024-11-08 17:26:34,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:26:34,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:26:34,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:26:34,048 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:26:34,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 17:26:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:26:34,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 17:26:34,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:26:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:26:34,292 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:26:34,292 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:26:34,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638531768] [2024-11-08 17:26:34,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638531768] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:26:34,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:26:34,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:26:34,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407309573] [2024-11-08 17:26:34,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:26:34,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:26:34,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:26:34,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:26:34,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:26:34,327 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-11-08 17:26:34,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 41 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2024-11-08 17:26:34,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:26:34,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-11-08 17:26:34,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:26:34,611 INFO L124 PetriNetUnfolderBase]: 347/619 cut-off events. [2024-11-08 17:26:34,611 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-11-08 17:26:34,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 619 events. 347/619 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2960 event pairs, 95 based on Foata normal form. 0/509 useless extension candidates. Maximal degree in co-relation 580. Up to 330 conditions per place. [2024-11-08 17:26:34,618 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 36 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2024-11-08 17:26:34,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 210 flow [2024-11-08 17:26:34,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:26:34,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:26:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-11-08 17:26:34,622 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-11-08 17:26:34,622 INFO L175 Difference]: Start difference. First operand has 37 places, 41 transitions, 96 flow. Second operand 5 states and 125 transitions. [2024-11-08 17:26:34,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 55 transitions, 210 flow [2024-11-08 17:26:34,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 55 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:26:34,627 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 112 flow [2024-11-08 17:26:34,628 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2024-11-08 17:26:34,629 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2024-11-08 17:26:34,629 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 112 flow [2024-11-08 17:26:34,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2024-11-08 17:26:34,629 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:26:34,630 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] [2024-11-08 17:26:34,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 17:26:34,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:26:34,831 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:26:34,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:26:34,832 INFO L85 PathProgramCache]: Analyzing trace with hash 888526471, now seen corresponding path program 1 times [2024-11-08 17:26:34,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:26:34,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801903543] [2024-11-08 17:26:34,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:26:34,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:26:34,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:26:34,835 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:26:34,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 17:26:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:26:34,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 17:26:34,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:26:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:26:34,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:26:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:26:35,068 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:26:35,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801903543] [2024-11-08 17:26:35,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801903543] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:26:35,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:26:35,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2024-11-08 17:26:35,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959209430] [2024-11-08 17:26:35,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:26:35,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:26:35,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:26:35,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:26:35,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:26:35,106 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-11-08 17:26:35,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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) [2024-11-08 17:26:35,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:26:35,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-11-08 17:26:35,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:26:35,586 INFO L124 PetriNetUnfolderBase]: 1091/1782 cut-off events. [2024-11-08 17:26:35,587 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2024-11-08 17:26:35,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3883 conditions, 1782 events. 1091/1782 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 8289 event pairs, 75 based on Foata normal form. 48/1671 useless extension candidates. Maximal degree in co-relation 1935. Up to 508 conditions per place. [2024-11-08 17:26:35,598 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 66 selfloop transitions, 15 changer transitions 0/90 dead transitions. [2024-11-08 17:26:35,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 90 transitions, 397 flow [2024-11-08 17:26:35,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:26:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 17:26:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-11-08 17:26:35,602 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.53156146179402 [2024-11-08 17:26:35,604 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 112 flow. Second operand 7 states and 160 transitions. [2024-11-08 17:26:35,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 90 transitions, 397 flow [2024-11-08 17:26:35,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 90 transitions, 389 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:26:35,609 INFO L231 Difference]: Finished difference. Result has 48 places, 52 transitions, 194 flow [2024-11-08 17:26:35,610 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=194, PETRI_PLACES=48, PETRI_TRANSITIONS=52} [2024-11-08 17:26:35,610 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 10 predicate places. [2024-11-08 17:26:35,611 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 52 transitions, 194 flow [2024-11-08 17:26:35,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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) [2024-11-08 17:26:35,611 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:26:35,611 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] [2024-11-08 17:26:35,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 17:26:35,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:26:35,812 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:26:35,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:26:35,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1428014495, now seen corresponding path program 2 times [2024-11-08 17:26:35,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:26:35,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144505603] [2024-11-08 17:26:35,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:26:35,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:26:35,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:26:35,816 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:26:35,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 17:26:35,913 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 17:26:35,914 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:26:35,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 17:26:35,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:26:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:26:36,006 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:26:36,006 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:26:36,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144505603] [2024-11-08 17:26:36,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144505603] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:26:36,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:26:36,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:26:36,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284437007] [2024-11-08 17:26:36,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:26:36,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:26:36,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:26:36,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:26:36,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:26:36,087 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-11-08 17:26:36,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 52 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2024-11-08 17:26:36,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:26:36,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-11-08 17:26:36,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:26:36,387 INFO L124 PetriNetUnfolderBase]: 499/951 cut-off events. [2024-11-08 17:26:36,387 INFO L125 PetriNetUnfolderBase]: For 373/383 co-relation queries the response was YES. [2024-11-08 17:26:36,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2231 conditions, 951 events. 499/951 cut-off events. For 373/383 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4951 event pairs, 309 based on Foata normal form. 1/846 useless extension candidates. Maximal degree in co-relation 1465. Up to 757 conditions per place. [2024-11-08 17:26:36,397 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 31 selfloop transitions, 2 changer transitions 2/55 dead transitions. [2024-11-08 17:26:36,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 270 flow [2024-11-08 17:26:36,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:26:36,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:26:36,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-11-08 17:26:36,399 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2024-11-08 17:26:36,399 INFO L175 Difference]: Start difference. First operand has 48 places, 52 transitions, 194 flow. Second operand 4 states and 94 transitions. [2024-11-08 17:26:36,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 270 flow [2024-11-08 17:26:36,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 270 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 17:26:36,406 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 210 flow [2024-11-08 17:26:36,406 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2024-11-08 17:26:36,407 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2024-11-08 17:26:36,407 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 210 flow [2024-11-08 17:26:36,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2024-11-08 17:26:36,408 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:26:36,408 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, 1] [2024-11-08 17:26:36,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 17:26:36,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:26:36,613 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:26:36,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:26:36,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1950233515, now seen corresponding path program 1 times [2024-11-08 17:26:36,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:26:36,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312964615] [2024-11-08 17:26:36,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:26:36,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:26:36,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:26:36,616 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:26:36,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 17:26:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:26:36,752 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 17:26:36,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:26:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:26:36,908 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:26:36,908 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:26:36,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312964615] [2024-11-08 17:26:36,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312964615] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:26:36,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:26:36,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:26:36,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61126530] [2024-11-08 17:26:36,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:26:36,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:26:36,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:26:36,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:26:36,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:26:36,938 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-11-08 17:26:36,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-11-08 17:26:36,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:26:36,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-11-08 17:26:36,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:26:37,309 INFO L124 PetriNetUnfolderBase]: 580/1161 cut-off events. [2024-11-08 17:26:37,309 INFO L125 PetriNetUnfolderBase]: For 480/493 co-relation queries the response was YES. [2024-11-08 17:26:37,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2758 conditions, 1161 events. 580/1161 cut-off events. For 480/493 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6442 event pairs, 369 based on Foata normal form. 32/1065 useless extension candidates. Maximal degree in co-relation 2208. Up to 758 conditions per place. [2024-11-08 17:26:37,317 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 2 changer transitions 25/79 dead transitions. [2024-11-08 17:26:37,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 79 transitions, 432 flow [2024-11-08 17:26:37,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:26:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:26:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-08 17:26:37,319 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5953488372093023 [2024-11-08 17:26:37,319 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 210 flow. Second operand 5 states and 128 transitions. [2024-11-08 17:26:37,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 79 transitions, 432 flow [2024-11-08 17:26:37,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 79 transitions, 424 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-08 17:26:37,325 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 226 flow [2024-11-08 17:26:37,325 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-11-08 17:26:37,326 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2024-11-08 17:26:37,326 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 226 flow [2024-11-08 17:26:37,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-11-08 17:26:37,326 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:26:37,326 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, 1, 1, 1] [2024-11-08 17:26:37,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 17:26:37,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:26:37,531 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:26:37,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:26:37,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1572151683, now seen corresponding path program 1 times [2024-11-08 17:26:37,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:26:37,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768406898] [2024-11-08 17:26:37,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:26:37,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:26:37,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:26:37,534 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:26:37,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 17:26:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:26:37,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 17:26:37,657 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:26:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:26:37,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:26:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:26:38,283 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:26:38,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768406898] [2024-11-08 17:26:38,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768406898] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:26:38,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:26:38,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-11-08 17:26:38,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029336230] [2024-11-08 17:26:38,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:26:38,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 17:26:38,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:26:38,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 17:26:38,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-11-08 17:26:38,394 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-11-08 17:26:38,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 226 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 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) [2024-11-08 17:26:38,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:26:38,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-11-08 17:26:38,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:26:38,902 INFO L124 PetriNetUnfolderBase]: 532/1109 cut-off events. [2024-11-08 17:26:38,902 INFO L125 PetriNetUnfolderBase]: For 647/696 co-relation queries the response was YES. [2024-11-08 17:26:38,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2831 conditions, 1109 events. 532/1109 cut-off events. For 647/696 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6168 event pairs, 205 based on Foata normal form. 32/1051 useless extension candidates. Maximal degree in co-relation 2808. Up to 543 conditions per place. [2024-11-08 17:26:38,912 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 67 selfloop transitions, 8 changer transitions 8/101 dead transitions. [2024-11-08 17:26:38,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 101 transitions, 581 flow [2024-11-08 17:26:38,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:26:38,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 17:26:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-11-08 17:26:38,914 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5481727574750831 [2024-11-08 17:26:38,915 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 226 flow. Second operand 7 states and 165 transitions. [2024-11-08 17:26:38,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 101 transitions, 581 flow [2024-11-08 17:26:38,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 101 transitions, 575 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-08 17:26:38,921 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 287 flow [2024-11-08 17:26:38,921 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=287, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-11-08 17:26:38,922 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2024-11-08 17:26:38,922 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 287 flow [2024-11-08 17:26:38,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 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) [2024-11-08 17:26:38,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:26:38,923 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, 1, 1, 1, 1, 1] [2024-11-08 17:26:38,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 17:26:39,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:26:39,124 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:26:39,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:26:39,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1058258682, now seen corresponding path program 1 times [2024-11-08 17:26:39,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:26:39,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892773204] [2024-11-08 17:26:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:26:39,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:26:39,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:26:39,128 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:26:39,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 17:26:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:26:39,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-08 17:26:39,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:26:40,468 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 17:26:40,470 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 17:26:40,491 INFO L349 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2024-11-08 17:26:40,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 13 [2024-11-08 17:26:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:26:40,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:26:50,593 INFO L349 Elim1Store]: treesize reduction 23, result has 74.7 percent of original size [2024-11-08 17:26:50,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 75 [2024-11-08 17:26:50,970 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2024-11-08 17:26:50,970 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 20 treesize of output 4 [2024-11-08 17:26:51,001 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2024-11-08 17:26:51,002 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 20 treesize of output 4 [2024-11-08 17:26:51,227 INFO L349 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2024-11-08 17:26:51,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 34 [2024-11-08 17:26:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:26:53,640 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:26:53,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892773204] [2024-11-08 17:26:53,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892773204] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:26:53,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:26:53,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2024-11-08 17:26:53,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321206938] [2024-11-08 17:26:53,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:26:53,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-08 17:26:53,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:26:53,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-08 17:26:53,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=362, Unknown=1, NotChecked=0, Total=462 [2024-11-08 17:26:56,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:26:57,642 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 43 [2024-11-08 17:26:57,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 287 flow. Second operand has 22 states, 22 states have (on average 7.909090909090909) internal successors, (174), 22 states have internal predecessors, (174), 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) [2024-11-08 17:26:57,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:26:57,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 43 [2024-11-08 17:26:57,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:27:05,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:27:09,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:27:14,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:27:24,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:27:28,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:27:38,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:27:44,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:27:50,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:27:55,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:27:59,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:28:04,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:28:09,517 INFO L124 PetriNetUnfolderBase]: 3739/6325 cut-off events. [2024-11-08 17:28:09,518 INFO L125 PetriNetUnfolderBase]: For 5429/5429 co-relation queries the response was YES. [2024-11-08 17:28:09,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18194 conditions, 6325 events. 3739/6325 cut-off events. For 5429/5429 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 38435 event pairs, 683 based on Foata normal form. 19/6037 useless extension candidates. Maximal degree in co-relation 10604. Up to 1590 conditions per place. [2024-11-08 17:28:09,558 INFO L140 encePairwiseOnDemand]: 22/43 looper letters, 202 selfloop transitions, 53 changer transitions 270/528 dead transitions. [2024-11-08 17:28:09,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 528 transitions, 3313 flow [2024-11-08 17:28:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-08 17:28:09,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-11-08 17:28:09,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 630 transitions. [2024-11-08 17:28:09,563 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-11-08 17:28:09,563 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 287 flow. Second operand 42 states and 630 transitions. [2024-11-08 17:28:09,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 528 transitions, 3313 flow [2024-11-08 17:28:09,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 528 transitions, 3291 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-11-08 17:28:09,591 INFO L231 Difference]: Finished difference. Result has 129 places, 105 transitions, 838 flow [2024-11-08 17:28:09,592 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=838, PETRI_PLACES=129, PETRI_TRANSITIONS=105} [2024-11-08 17:28:09,592 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 91 predicate places. [2024-11-08 17:28:09,593 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 105 transitions, 838 flow [2024-11-08 17:28:09,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.909090909090909) internal successors, (174), 22 states have internal predecessors, (174), 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) [2024-11-08 17:28:09,593 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:28:09,593 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:28:09,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 17:28:09,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:28:09,798 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:28:09,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:28:09,798 INFO L85 PathProgramCache]: Analyzing trace with hash -167463282, now seen corresponding path program 2 times [2024-11-08 17:28:09,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:28:09,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212354399] [2024-11-08 17:28:09,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:28:09,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:28:09,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:28:09,800 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:28:09,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 17:28:09,921 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:28:09,921 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:28:09,925 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-08 17:28:09,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:28:12,011 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2024-11-08 17:28:12,012 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 34 treesize of output 10 [2024-11-08 17:28:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:28:12,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:28:15,549 INFO L349 Elim1Store]: treesize reduction 70, result has 23.1 percent of original size [2024-11-08 17:28:15,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 28 [2024-11-08 17:28:15,581 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2024-11-08 17:28:15,581 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 20 treesize of output 4 [2024-11-08 17:28:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:28:17,078 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:28:17,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212354399] [2024-11-08 17:28:17,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212354399] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:28:17,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:28:17,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2024-11-08 17:28:17,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604053423] [2024-11-08 17:28:17,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:28:17,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-08 17:28:17,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:28:17,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-08 17:28:17,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2024-11-08 17:28:17,846 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 43 [2024-11-08 17:28:17,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 105 transitions, 838 flow. Second operand has 28 states, 28 states have (on average 7.428571428571429) internal successors, (208), 28 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:28:17,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:28:17,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 43 [2024-11-08 17:28:17,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:28:36,412 INFO L124 PetriNetUnfolderBase]: 6014/10123 cut-off events. [2024-11-08 17:28:36,413 INFO L125 PetriNetUnfolderBase]: For 55782/55782 co-relation queries the response was YES. [2024-11-08 17:28:36,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40833 conditions, 10123 events. 6014/10123 cut-off events. For 55782/55782 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 63534 event pairs, 252 based on Foata normal form. 76/9718 useless extension candidates. Maximal degree in co-relation 40772. Up to 1827 conditions per place. [2024-11-08 17:28:36,606 INFO L140 encePairwiseOnDemand]: 23/43 looper letters, 329 selfloop transitions, 233 changer transitions 82/647 dead transitions. [2024-11-08 17:28:36,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 647 transitions, 6146 flow [2024-11-08 17:28:36,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-08 17:28:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-11-08 17:28:36,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 662 transitions. [2024-11-08 17:28:36,613 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32073643410852715 [2024-11-08 17:28:36,613 INFO L175 Difference]: Start difference. First operand has 129 places, 105 transitions, 838 flow. Second operand 48 states and 662 transitions. [2024-11-08 17:28:36,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 647 transitions, 6146 flow [2024-11-08 17:28:37,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 647 transitions, 4897 flow, removed 621 selfloop flow, removed 20 redundant places. [2024-11-08 17:28:37,579 INFO L231 Difference]: Finished difference. Result has 156 places, 341 transitions, 3434 flow [2024-11-08 17:28:37,579 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=3434, PETRI_PLACES=156, PETRI_TRANSITIONS=341} [2024-11-08 17:28:37,580 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 118 predicate places. [2024-11-08 17:28:37,580 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 341 transitions, 3434 flow [2024-11-08 17:28:37,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.428571428571429) internal successors, (208), 28 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:28:37,581 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:28:37,581 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, 1, 1, 1, 1, 1, 1] [2024-11-08 17:28:37,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 17:28:37,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:28:37,782 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:28:37,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:28:37,783 INFO L85 PathProgramCache]: Analyzing trace with hash 799220651, now seen corresponding path program 1 times [2024-11-08 17:28:37,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:28:37,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554547301] [2024-11-08 17:28:37,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:28:37,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:28:37,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:28:37,785 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:28:37,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 17:28:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:28:37,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 17:28:37,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:28:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:28:38,209 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:28:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:28:38,500 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-08 17:28:38,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554547301] [2024-11-08 17:28:38,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554547301] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:28:38,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:28:38,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-11-08 17:28:38,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755607753] [2024-11-08 17:28:38,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 17:28:38,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:28:38,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-08 17:28:38,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:28:38,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:28:38,769 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-11-08 17:28:38,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 341 transitions, 3434 flow. Second operand has 12 states, 12 states have (on average 15.083333333333334) internal successors, (181), 12 states have internal predecessors, (181), 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) [2024-11-08 17:28:38,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:28:38,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-11-08 17:28:38,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:28:40,926 INFO L124 PetriNetUnfolderBase]: 3980/7991 cut-off events. [2024-11-08 17:28:40,926 INFO L125 PetriNetUnfolderBase]: For 33865/34274 co-relation queries the response was YES. [2024-11-08 17:28:40,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33142 conditions, 7991 events. 3980/7991 cut-off events. For 33865/34274 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 61760 event pairs, 719 based on Foata normal form. 353/7819 useless extension candidates. Maximal degree in co-relation 33060. Up to 2261 conditions per place. [2024-11-08 17:28:40,997 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 349 selfloop transitions, 137 changer transitions 68/600 dead transitions. [2024-11-08 17:28:40,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 600 transitions, 6911 flow [2024-11-08 17:28:40,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 17:28:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-08 17:28:40,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 264 transitions. [2024-11-08 17:28:40,999 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-11-08 17:28:40,999 INFO L175 Difference]: Start difference. First operand has 156 places, 341 transitions, 3434 flow. Second operand 14 states and 264 transitions. [2024-11-08 17:28:40,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 600 transitions, 6911 flow [2024-11-08 17:28:41,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 600 transitions, 6007 flow, removed 391 selfloop flow, removed 11 redundant places. [2024-11-08 17:28:41,441 INFO L231 Difference]: Finished difference. Result has 156 places, 365 transitions, 3792 flow [2024-11-08 17:28:41,442 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2824, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3792, PETRI_PLACES=156, PETRI_TRANSITIONS=365} [2024-11-08 17:28:41,442 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 118 predicate places. [2024-11-08 17:28:41,442 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 365 transitions, 3792 flow [2024-11-08 17:28:41,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.083333333333334) internal successors, (181), 12 states have internal predecessors, (181), 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) [2024-11-08 17:28:41,443 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:28:41,443 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:28:41,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 17:28:41,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:28:41,653 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-08 17:28:41,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:28:41,654 INFO L85 PathProgramCache]: Analyzing trace with hash 2071184198, now seen corresponding path program 3 times [2024-11-08 17:28:41,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-08 17:28:41,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370132842] [2024-11-08 17:28:41,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 17:28:41,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:28:41,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:28:41,657 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:28:41,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aa54873-3766-49ea-9de9-068fc1bf1ef2/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process