./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC --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 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 00:51:59,778 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 00:51:59,880 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-24 00:51:59,886 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 00:51:59,890 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 00:51:59,929 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 00:51:59,931 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 00:51:59,931 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 00:51:59,932 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 00:51:59,932 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 00:51:59,933 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 00:51:59,933 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 00:51:59,934 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 00:51:59,934 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 00:51:59,934 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 00:51:59,934 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 00:51:59,935 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-24 00:51:59,935 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 00:51:59,935 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 00:51:59,935 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 00:51:59,935 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 00:51:59,935 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-24 00:51:59,935 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 00:51:59,936 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-24 00:51:59,936 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 00:51:59,936 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-24 00:51:59,936 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 00:51:59,936 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 00:51:59,936 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 00:51:59,936 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:51:59,937 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:51:59,937 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:51:59,938 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:51:59,938 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 00:51:59,938 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:51:59,938 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:51:59,938 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:51:59,938 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:51:59,938 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 00:51:59,939 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 00:51:59,939 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-24 00:51:59,939 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-24 00:51:59,939 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 00:51:59,939 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 00:51:59,939 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 00:51:59,939 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 00:51:59,939 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 00:51:59,939 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 00:51:59,939 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC 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 -> 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 [2024-11-24 00:52:00,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 00:52:00,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 00:52:00,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 00:52:00,291 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 00:52:00,291 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 00:52:00,293 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2024-11-24 00:52:03,358 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/data/bb406b5f0/04b86c0f27d546e89ce4ffc602751c59/FLAGe48a080f6 [2024-11-24 00:52:03,679 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 00:52:03,680 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2024-11-24 00:52:03,689 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/data/bb406b5f0/04b86c0f27d546e89ce4ffc602751c59/FLAGe48a080f6 [2024-11-24 00:52:03,949 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/data/bb406b5f0/04b86c0f27d546e89ce4ffc602751c59 [2024-11-24 00:52:03,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 00:52:03,954 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 00:52:03,956 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 00:52:03,957 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 00:52:03,965 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 00:52:03,966 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:52:03" (1/1) ... [2024-11-24 00:52:03,967 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14837426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:52:03, skipping insertion in model container [2024-11-24 00:52:03,967 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:52:03" (1/1) ... [2024-11-24 00:52:03,989 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 00:52:04,186 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_d87a8f89-a714-4307-b3aa-262163a9e913/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2950,2963] [2024-11-24 00:52:04,199 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:52:04,211 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 00:52:04,243 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_d87a8f89-a714-4307-b3aa-262163a9e913/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2950,2963] [2024-11-24 00:52:04,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:52:04,262 INFO L204 MainTranslator]: Completed translation [2024-11-24 00:52:04,263 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:52:04 WrapperNode [2024-11-24 00:52:04,263 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 00:52:04,264 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 00:52:04,264 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 00:52:04,264 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 00:52:04,270 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:52:04" (1/1) ... [2024-11-24 00:52:04,277 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:52:04" (1/1) ... [2024-11-24 00:52:04,300 INFO L138 Inliner]: procedures = 23, calls = 35, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 183 [2024-11-24 00:52:04,300 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 00:52:04,301 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 00:52:04,301 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 00:52:04,301 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 00:52:04,311 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:52:04" (1/1) ... [2024-11-24 00:52:04,311 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:52:04" (1/1) ... [2024-11-24 00:52:04,314 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:52:04" (1/1) ... [2024-11-24 00:52:04,329 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]. [2024-11-24 00:52:04,330 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:52:04" (1/1) ... [2024-11-24 00:52:04,330 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:52:04" (1/1) ... [2024-11-24 00:52:04,344 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:52:04" (1/1) ... [2024-11-24 00:52:04,346 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:52:04" (1/1) ... [2024-11-24 00:52:04,354 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:52:04" (1/1) ... [2024-11-24 00:52:04,355 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:52:04" (1/1) ... [2024-11-24 00:52:04,360 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:52:04" (1/1) ... [2024-11-24 00:52:04,363 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 00:52:04,364 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 00:52:04,364 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 00:52:04,364 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 00:52:04,365 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:52:04" (1/1) ... [2024-11-24 00:52:04,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:52:04,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:52:04,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 00:52:04,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 00:52:04,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 00:52:04,437 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-24 00:52:04,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-24 00:52:04,437 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-24 00:52:04,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-24 00:52:04,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 00:52:04,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-24 00:52:04,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-24 00:52:04,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-24 00:52:04,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-24 00:52:04,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-24 00:52:04,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-24 00:52:04,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 00:52:04,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 00:52:04,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-24 00:52:04,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-24 00:52:04,440 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-24 00:52:04,572 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 00:52:04,574 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 00:52:04,944 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-24 00:52:04,944 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 00:52:05,365 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 00:52:05,365 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-24 00:52:05,365 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:52:05 BoogieIcfgContainer [2024-11-24 00:52:05,365 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 00:52:05,371 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 00:52:05,371 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 00:52:05,376 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 00:52:05,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 12:52:03" (1/3) ... [2024-11-24 00:52:05,377 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f8623d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:52:05, skipping insertion in model container [2024-11-24 00:52:05,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:52:04" (2/3) ... [2024-11-24 00:52:05,378 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f8623d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:52:05, skipping insertion in model container [2024-11-24 00:52:05,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:52:05" (3/3) ... [2024-11-24 00:52:05,380 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2024-11-24 00:52:05,400 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 00:52:05,402 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-inc-subseq.wvr.c that has 3 procedures, 27 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-24 00:52:05,402 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-24 00:52:05,500 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-24 00:52:05,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 31 transitions, 76 flow [2024-11-24 00:52:05,585 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2024-11-24 00:52:05,587 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-24 00:52:05,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 29 events. 5/29 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 43 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-11-24 00:52:05,592 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 31 transitions, 76 flow [2024-11-24 00:52:05,596 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 28 transitions, 68 flow [2024-11-24 00:52:05,610 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 00:52:05,627 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;@201a452e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 00:52:05,627 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-24 00:52:05,648 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-24 00:52:05,648 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2024-11-24 00:52:05,649 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-24 00:52:05,649 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:52:05,649 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:52:05,650 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:52:05,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:52:05,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1515608969, now seen corresponding path program 1 times [2024-11-24 00:52:05,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:52:05,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998871567] [2024-11-24 00:52:05,668 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:52:05,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:52:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:52:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:52:06,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:52:06,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998871567] [2024-11-24 00:52:06,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998871567] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:52:06,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:52:06,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:52:06,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055641795] [2024-11-24 00:52:06,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:52:06,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:52:06,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:52:06,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:52:06,236 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:52:06,256 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-24 00:52:06,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2024-11-24 00:52:06,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:52:06,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-24 00:52:06,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:52:06,444 INFO L124 PetriNetUnfolderBase]: 202/345 cut-off events. [2024-11-24 00:52:06,444 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-24 00:52:06,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 345 events. 202/345 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1373 event pairs, 51 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 651. Up to 188 conditions per place. [2024-11-24 00:52:06,453 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 31 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2024-11-24 00:52:06,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 163 flow [2024-11-24 00:52:06,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:52:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 00:52:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-24 00:52:06,475 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5403225806451613 [2024-11-24 00:52:06,477 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 68 flow. Second operand 4 states and 67 transitions. [2024-11-24 00:52:06,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 163 flow [2024-11-24 00:52:06,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 40 transitions, 153 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 00:52:06,490 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 74 flow [2024-11-24 00:52:06,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-11-24 00:52:06,499 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2024-11-24 00:52:06,500 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 74 flow [2024-11-24 00:52:06,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2024-11-24 00:52:06,500 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:52:06,500 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:52:06,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-24 00:52:06,501 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:52:06,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:52:06,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1423681736, now seen corresponding path program 1 times [2024-11-24 00:52:06,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:52:06,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778539950] [2024-11-24 00:52:06,503 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:52:06,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:52:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:52:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:52:06,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:52:06,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778539950] [2024-11-24 00:52:06,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778539950] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:52:06,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:52:06,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:52:06,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851631260] [2024-11-24 00:52:06,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:52:06,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 00:52:06,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:52:06,809 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 00:52:06,809 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:52:06,818 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-24 00:52:06,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:52:06,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:52:06,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-24 00:52:06,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:52:07,018 INFO L124 PetriNetUnfolderBase]: 202/370 cut-off events. [2024-11-24 00:52:07,018 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-24 00:52:07,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 370 events. 202/370 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1573 event pairs, 126 based on Foata normal form. 1/329 useless extension candidates. Maximal degree in co-relation 285. Up to 320 conditions per place. [2024-11-24 00:52:07,024 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 22 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-11-24 00:52:07,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 124 flow [2024-11-24 00:52:07,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:52:07,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 00:52:07,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-11-24 00:52:07,026 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-24 00:52:07,027 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 74 flow. Second operand 3 states and 48 transitions. [2024-11-24 00:52:07,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 124 flow [2024-11-24 00:52:07,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 00:52:07,029 INFO L231 Difference]: Finished difference. Result has 31 places, 30 transitions, 82 flow [2024-11-24 00:52:07,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=31, PETRI_TRANSITIONS=30} [2024-11-24 00:52:07,030 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-11-24 00:52:07,030 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 82 flow [2024-11-24 00:52:07,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:52:07,030 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:52:07,030 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:52:07,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-24 00:52:07,031 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:52:07,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:52:07,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1301693413, now seen corresponding path program 1 times [2024-11-24 00:52:07,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:52:07,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223722364] [2024-11-24 00:52:07,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:52:07,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:52:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:52:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:52:07,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:52:07,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223722364] [2024-11-24 00:52:07,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223722364] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:52:07,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:52:07,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 00:52:07,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842714365] [2024-11-24 00:52:07,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:52:07,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 00:52:07,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:52:07,252 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 00:52:07,252 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:52:07,252 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-24 00:52:07,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2024-11-24 00:52:07,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:52:07,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-24 00:52:07,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:52:07,436 INFO L124 PetriNetUnfolderBase]: 257/478 cut-off events. [2024-11-24 00:52:07,436 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-24 00:52:07,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 478 events. 257/478 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2118 event pairs, 94 based on Foata normal form. 1/431 useless extension candidates. Maximal degree in co-relation 951. Up to 216 conditions per place. [2024-11-24 00:52:07,444 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 34 selfloop transitions, 2 changer transitions 2/44 dead transitions. [2024-11-24 00:52:07,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 194 flow [2024-11-24 00:52:07,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:52:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 00:52:07,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-11-24 00:52:07,446 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6451612903225806 [2024-11-24 00:52:07,446 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 82 flow. Second operand 3 states and 60 transitions. [2024-11-24 00:52:07,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 194 flow [2024-11-24 00:52:07,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 44 transitions, 190 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-24 00:52:07,450 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 90 flow [2024-11-24 00:52:07,451 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-11-24 00:52:07,451 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2024-11-24 00:52:07,451 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 90 flow [2024-11-24 00:52:07,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2024-11-24 00:52:07,452 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:52:07,452 INFO L206 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] [2024-11-24 00:52:07,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-24 00:52:07,452 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:52:07,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:52:07,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1142856318, now seen corresponding path program 1 times [2024-11-24 00:52:07,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:52:07,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326672149] [2024-11-24 00:52:07,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:52:07,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:52:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:52:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:52:07,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:52:07,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326672149] [2024-11-24 00:52:07,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326672149] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:52:07,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:52:07,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 00:52:07,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446355531] [2024-11-24 00:52:07,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:52:07,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 00:52:07,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:52:07,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 00:52:07,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:52:07,642 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-24 00:52:07,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-11-24 00:52:07,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:52:07,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-24 00:52:07,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:52:07,812 INFO L124 PetriNetUnfolderBase]: 250/472 cut-off events. [2024-11-24 00:52:07,812 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-11-24 00:52:07,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1045 conditions, 472 events. 250/472 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2070 event pairs, 102 based on Foata normal form. 9/444 useless extension candidates. Maximal degree in co-relation 1022. Up to 314 conditions per place. [2024-11-24 00:52:07,818 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 32 selfloop transitions, 2 changer transitions 4/44 dead transitions. [2024-11-24 00:52:07,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 201 flow [2024-11-24 00:52:07,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:52:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 00:52:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-11-24 00:52:07,820 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6344086021505376 [2024-11-24 00:52:07,820 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 90 flow. Second operand 3 states and 59 transitions. [2024-11-24 00:52:07,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 201 flow [2024-11-24 00:52:07,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 00:52:07,822 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 100 flow [2024-11-24 00:52:07,822 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2024-11-24 00:52:07,823 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2024-11-24 00:52:07,823 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 100 flow [2024-11-24 00:52:07,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-11-24 00:52:07,824 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:52:07,824 INFO L206 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] [2024-11-24 00:52:07,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-24 00:52:07,825 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:52:07,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:52:07,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1028343269, now seen corresponding path program 1 times [2024-11-24 00:52:07,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:52:07,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526234117] [2024-11-24 00:52:07,826 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:52:07,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:52:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:52:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:52:08,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:52:08,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526234117] [2024-11-24 00:52:08,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526234117] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:52:08,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:52:08,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:52:08,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125455306] [2024-11-24 00:52:08,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:52:08,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:52:08,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:52:08,039 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:52:08,039 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:52:08,039 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-24 00:52:08,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2024-11-24 00:52:08,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:52:08,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-24 00:52:08,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:52:08,249 INFO L124 PetriNetUnfolderBase]: 307/599 cut-off events. [2024-11-24 00:52:08,250 INFO L125 PetriNetUnfolderBase]: For 77/85 co-relation queries the response was YES. [2024-11-24 00:52:08,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1379 conditions, 599 events. 307/599 cut-off events. For 77/85 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2896 event pairs, 247 based on Foata normal form. 12/562 useless extension candidates. Maximal degree in co-relation 1079. Up to 433 conditions per place. [2024-11-24 00:52:08,253 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 25 selfloop transitions, 2 changer transitions 17/50 dead transitions. [2024-11-24 00:52:08,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 242 flow [2024-11-24 00:52:08,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:52:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 00:52:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-11-24 00:52:08,256 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-24 00:52:08,256 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 100 flow. Second operand 5 states and 80 transitions. [2024-11-24 00:52:08,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 242 flow [2024-11-24 00:52:08,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 00:52:08,259 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 114 flow [2024-11-24 00:52:08,259 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2024-11-24 00:52:08,264 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 11 predicate places. [2024-11-24 00:52:08,264 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 114 flow [2024-11-24 00:52:08,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2024-11-24 00:52:08,265 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:52:08,265 INFO L206 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] [2024-11-24 00:52:08,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-24 00:52:08,265 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:52:08,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:52:08,266 INFO L85 PathProgramCache]: Analyzing trace with hash -776053246, now seen corresponding path program 1 times [2024-11-24 00:52:08,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:52:08,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80506142] [2024-11-24 00:52:08,266 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:52:08,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:52:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:52:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:52:10,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:52:10,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80506142] [2024-11-24 00:52:10,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80506142] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:52:10,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885919521] [2024-11-24 00:52:10,258 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:52:10,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:52:10,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:52:10,264 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:52:10,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 00:52:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:52:10,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-24 00:52:10,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:52:10,488 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 [2024-11-24 00:52:10,579 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 [2024-11-24 00:52:10,710 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 00:52:10,710 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 [2024-11-24 00:52:10,795 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 15 treesize of output 1 [2024-11-24 00:52:11,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2024-11-24 00:52:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:52:11,815 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:52:16,743 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-11-24 00:52:16,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 258 treesize of output 248 [2024-11-24 00:52:16,791 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:52:16,792 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 194 treesize of output 186 [2024-11-24 00:52:17,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2024-11-24 00:52:17,390 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:52:17,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 164 [2024-11-24 00:52:19,295 INFO L349 Elim1Store]: treesize reduction 16, result has 65.2 percent of original size [2024-11-24 00:52:19,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 178 treesize of output 152 [2024-11-24 00:52:19,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:52:19,322 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 148 treesize of output 144 [2024-11-24 00:52:19,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 13 [2024-11-24 00:52:19,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:52:19,691 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 36 treesize of output 35 [2024-11-24 00:52:19,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:52:19,742 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 36 treesize of output 35 [2024-11-24 00:52:19,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 13 [2024-11-24 00:52:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:52:19,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885919521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:52:19,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:52:19,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 28 [2024-11-24 00:52:19,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031568413] [2024-11-24 00:52:19,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:52:19,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-24 00:52:19,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:52:19,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-24 00:52:19,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2024-11-24 00:52:19,975 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-11-24 00:52:19,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 114 flow. Second operand has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 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) [2024-11-24 00:52:19,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:52:19,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-11-24 00:52:19,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:52:24,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:52:28,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:52:37,924 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] [2024-11-24 00:52:40,797 INFO L124 PetriNetUnfolderBase]: 1347/2283 cut-off events. [2024-11-24 00:52:40,797 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2024-11-24 00:52:40,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5390 conditions, 2283 events. 1347/2283 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 11585 event pairs, 213 based on Foata normal form. 4/1989 useless extension candidates. Maximal degree in co-relation 5371. Up to 437 conditions per place. [2024-11-24 00:52:40,811 INFO L140 encePairwiseOnDemand]: 15/31 looper letters, 197 selfloop transitions, 64 changer transitions 85/349 dead transitions. [2024-11-24 00:52:40,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 349 transitions, 1697 flow [2024-11-24 00:52:40,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-24 00:52:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-11-24 00:52:40,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 544 transitions. [2024-11-24 00:52:40,821 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42800944138473646 [2024-11-24 00:52:40,821 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 114 flow. Second operand 41 states and 544 transitions. [2024-11-24 00:52:40,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 349 transitions, 1697 flow [2024-11-24 00:52:40,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 349 transitions, 1677 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-11-24 00:52:40,833 INFO L231 Difference]: Finished difference. Result has 100 places, 100 transitions, 639 flow [2024-11-24 00:52:40,833 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=639, PETRI_PLACES=100, PETRI_TRANSITIONS=100} [2024-11-24 00:52:40,836 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 70 predicate places. [2024-11-24 00:52:40,837 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 100 transitions, 639 flow [2024-11-24 00:52:40,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.448275862068965) internal successors, (216), 29 states have internal predecessors, (216), 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) [2024-11-24 00:52:40,837 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:52:40,838 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-24 00:52:40,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 00:52:41,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-24 00:52:41,042 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:52:41,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:52:41,043 INFO L85 PathProgramCache]: Analyzing trace with hash 800822541, now seen corresponding path program 2 times [2024-11-24 00:52:41,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:52:41,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359196673] [2024-11-24 00:52:41,044 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:52:41,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:52:41,089 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 00:52:41,089 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:52:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:52:41,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:52:41,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359196673] [2024-11-24 00:52:41,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359196673] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:52:41,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:52:41,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-24 00:52:41,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106041069] [2024-11-24 00:52:41,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:52:41,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-24 00:52:41,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:52:41,793 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-24 00:52:41,793 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-24 00:52:41,889 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-24 00:52:41,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 100 transitions, 639 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 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) [2024-11-24 00:52:41,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:52:41,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-24 00:52:41,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:52:42,712 INFO L124 PetriNetUnfolderBase]: 747/1472 cut-off events. [2024-11-24 00:52:42,712 INFO L125 PetriNetUnfolderBase]: For 4378/4399 co-relation queries the response was YES. [2024-11-24 00:52:42,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5551 conditions, 1472 events. 747/1472 cut-off events. For 4378/4399 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7753 event pairs, 47 based on Foata normal form. 7/1445 useless extension candidates. Maximal degree in co-relation 5503. Up to 426 conditions per place. [2024-11-24 00:52:42,731 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 105 selfloop transitions, 33 changer transitions 6/154 dead transitions. [2024-11-24 00:52:42,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 154 transitions, 1259 flow [2024-11-24 00:52:42,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 00:52:42,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 00:52:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-11-24 00:52:42,736 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-24 00:52:42,741 INFO L175 Difference]: Start difference. First operand has 100 places, 100 transitions, 639 flow. Second operand 9 states and 144 transitions. [2024-11-24 00:52:42,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 154 transitions, 1259 flow [2024-11-24 00:52:42,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 154 transitions, 1108 flow, removed 71 selfloop flow, removed 9 redundant places. [2024-11-24 00:52:42,786 INFO L231 Difference]: Finished difference. Result has 94 places, 105 transitions, 688 flow [2024-11-24 00:52:42,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=688, PETRI_PLACES=94, PETRI_TRANSITIONS=105} [2024-11-24 00:52:42,787 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2024-11-24 00:52:42,789 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 105 transitions, 688 flow [2024-11-24 00:52:42,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 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) [2024-11-24 00:52:42,789 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:52:42,790 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:52:42,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-24 00:52:42,790 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:52:42,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:52:42,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1859763725, now seen corresponding path program 3 times [2024-11-24 00:52:42,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:52:42,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276561029] [2024-11-24 00:52:42,791 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:52:42,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:52:42,846 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 00:52:42,846 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:52:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:52:43,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:52:43,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276561029] [2024-11-24 00:52:43,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276561029] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:52:43,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108500561] [2024-11-24 00:52:43,108 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:52:43,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:52:43,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:52:43,111 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:52:43,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 00:52:43,217 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 00:52:43,217 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:52:43,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 00:52:43,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:52:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:52:43,631 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:52:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:52:44,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108500561] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:52:44,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:52:44,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-11-24 00:52:44,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956487249] [2024-11-24 00:52:44,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:52:44,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-24 00:52:44,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:52:44,182 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-24 00:52:44,182 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-11-24 00:52:44,359 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-24 00:52:44,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 105 transitions, 688 flow. Second operand has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 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) [2024-11-24 00:52:44,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:52:44,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-24 00:52:44,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:52:45,583 INFO L124 PetriNetUnfolderBase]: 648/1345 cut-off events. [2024-11-24 00:52:45,584 INFO L125 PetriNetUnfolderBase]: For 4052/4091 co-relation queries the response was YES. [2024-11-24 00:52:45,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4943 conditions, 1345 events. 648/1345 cut-off events. For 4052/4091 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 7185 event pairs, 251 based on Foata normal form. 56/1373 useless extension candidates. Maximal degree in co-relation 3989. Up to 569 conditions per place. [2024-11-24 00:52:45,593 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 35 selfloop transitions, 3 changer transitions 87/131 dead transitions. [2024-11-24 00:52:45,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 131 transitions, 1064 flow [2024-11-24 00:52:45,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 00:52:45,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 00:52:45,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-11-24 00:52:45,595 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-24 00:52:45,595 INFO L175 Difference]: Start difference. First operand has 94 places, 105 transitions, 688 flow. Second operand 9 states and 144 transitions. [2024-11-24 00:52:45,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 131 transitions, 1064 flow [2024-11-24 00:52:45,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 131 transitions, 1008 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-24 00:52:45,614 INFO L231 Difference]: Finished difference. Result has 95 places, 44 transitions, 242 flow [2024-11-24 00:52:45,614 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=242, PETRI_PLACES=95, PETRI_TRANSITIONS=44} [2024-11-24 00:52:45,615 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2024-11-24 00:52:45,615 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 44 transitions, 242 flow [2024-11-24 00:52:45,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 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) [2024-11-24 00:52:45,615 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:52:45,616 INFO L206 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] [2024-11-24 00:52:45,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-24 00:52:45,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-24 00:52:45,816 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:52:45,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:52:45,817 INFO L85 PathProgramCache]: Analyzing trace with hash 237262174, now seen corresponding path program 4 times [2024-11-24 00:52:45,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:52:45,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692708324] [2024-11-24 00:52:45,817 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:52:45,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:52:45,853 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:52:45,853 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:52:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:52:45,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:52:45,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692708324] [2024-11-24 00:52:45,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692708324] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:52:45,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:52:45,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:52:45,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205037464] [2024-11-24 00:52:45,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:52:45,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:52:45,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:52:45,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:52:45,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:52:46,009 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-24 00:52:46,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 44 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2024-11-24 00:52:46,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:52:46,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-24 00:52:46,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:52:46,395 INFO L124 PetriNetUnfolderBase]: 627/1239 cut-off events. [2024-11-24 00:52:46,396 INFO L125 PetriNetUnfolderBase]: For 2805/2870 co-relation queries the response was YES. [2024-11-24 00:52:46,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4214 conditions, 1239 events. 627/1239 cut-off events. For 2805/2870 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 5834 event pairs, 216 based on Foata normal form. 34/1256 useless extension candidates. Maximal degree in co-relation 4174. Up to 395 conditions per place. [2024-11-24 00:52:46,408 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 68 selfloop transitions, 11 changer transitions 1/86 dead transitions. [2024-11-24 00:52:46,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 86 transitions, 615 flow [2024-11-24 00:52:46,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:52:46,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 00:52:46,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-11-24 00:52:46,410 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6935483870967742 [2024-11-24 00:52:46,410 INFO L175 Difference]: Start difference. First operand has 95 places, 44 transitions, 242 flow. Second operand 4 states and 86 transitions. [2024-11-24 00:52:46,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 86 transitions, 615 flow [2024-11-24 00:52:46,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 86 transitions, 543 flow, removed 30 selfloop flow, removed 17 redundant places. [2024-11-24 00:52:46,420 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 301 flow [2024-11-24 00:52:46,420 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=301, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-11-24 00:52:46,421 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2024-11-24 00:52:46,422 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 301 flow [2024-11-24 00:52:46,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2024-11-24 00:52:46,423 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:52:46,423 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:52:46,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-24 00:52:46,423 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:52:46,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:52:46,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1506729840, now seen corresponding path program 5 times [2024-11-24 00:52:46,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:52:46,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593411059] [2024-11-24 00:52:46,424 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:52:46,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:52:46,475 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:52:46,476 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:52:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:52:46,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:52:46,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593411059] [2024-11-24 00:52:46,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593411059] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:52:46,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900690034] [2024-11-24 00:52:46,720 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:52:46,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:52:46,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:52:46,723 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:52:46,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 00:52:46,837 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:52:46,837 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:52:46,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 00:52:46,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:52:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:52:47,200 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:52:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:52:47,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900690034] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:52:47,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:52:47,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-24 00:52:47,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695294350] [2024-11-24 00:52:47,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:52:47,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-24 00:52:47,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:52:47,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-24 00:52:47,403 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-11-24 00:52:47,502 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-24 00:52:47,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 301 flow. Second operand has 13 states, 13 states have (on average 11.538461538461538) internal successors, (150), 13 states have internal predecessors, (150), 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) [2024-11-24 00:52:47,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:52:47,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-24 00:52:47,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:52:48,118 INFO L124 PetriNetUnfolderBase]: 685/1424 cut-off events. [2024-11-24 00:52:48,119 INFO L125 PetriNetUnfolderBase]: For 2308/2417 co-relation queries the response was YES. [2024-11-24 00:52:48,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4412 conditions, 1424 events. 685/1424 cut-off events. For 2308/2417 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 7134 event pairs, 391 based on Foata normal form. 27/1373 useless extension candidates. Maximal degree in co-relation 4377. Up to 891 conditions per place. [2024-11-24 00:52:48,128 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 54 selfloop transitions, 5 changer transitions 25/90 dead transitions. [2024-11-24 00:52:48,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 688 flow [2024-11-24 00:52:48,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:52:48,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 00:52:48,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-11-24 00:52:48,130 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47580645161290325 [2024-11-24 00:52:48,130 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 301 flow. Second operand 8 states and 118 transitions. [2024-11-24 00:52:48,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 688 flow [2024-11-24 00:52:48,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 678 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-11-24 00:52:48,138 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 325 flow [2024-11-24 00:52:48,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=325, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2024-11-24 00:52:48,140 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-11-24 00:52:48,140 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 325 flow [2024-11-24 00:52:48,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.538461538461538) internal successors, (150), 13 states have internal predecessors, (150), 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) [2024-11-24 00:52:48,141 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:52:48,141 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-24 00:52:48,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-24 00:52:48,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-24 00:52:48,342 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:52:48,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:52:48,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1089102991, now seen corresponding path program 6 times [2024-11-24 00:52:48,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:52:48,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668862569] [2024-11-24 00:52:48,344 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:52:48,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:52:48,452 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 00:52:48,452 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:52:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:52:52,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:52:52,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668862569] [2024-11-24 00:52:52,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668862569] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:52:52,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165575876] [2024-11-24 00:52:52,798 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:52:52,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:52:52,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:52:52,804 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:52:52,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 00:52:52,940 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 00:52:52,941 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:52:52,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-24 00:52:52,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:52:52,977 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 [2024-11-24 00:52:53,315 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 [2024-11-24 00:52:53,489 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 00:52:53,489 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 [2024-11-24 00:52:53,628 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 [2024-11-24 00:52:53,667 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 [2024-11-24 00:52:57,477 INFO L349 Elim1Store]: treesize reduction 140, result has 26.7 percent of original size [2024-11-24 00:52:57,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 66 [2024-11-24 00:52:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:52:57,768 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:53:03,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:53:03,671 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 142 treesize of output 82 [2024-11-24 00:53:03,909 INFO L349 Elim1Store]: treesize reduction 8, result has 90.6 percent of original size [2024-11-24 00:53:03,909 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 224 treesize of output 232 [2024-11-24 00:53:03,962 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-24 00:53:04,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:53:04,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 150 treesize of output 166 [2024-11-24 00:53:05,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:53:05,572 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 189 treesize of output 105 [2024-11-24 00:53:06,117 INFO L349 Elim1Store]: treesize reduction 20, result has 89.8 percent of original size [2024-11-24 00:53:06,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 313 treesize of output 396 [2024-11-24 00:53:06,170 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-24 00:53:06,184 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-24 00:53:06,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:53:06,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 207 treesize of output 295 [2024-11-24 00:54:35,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:54:35,340 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 194 treesize of output 110 [2024-11-24 00:54:35,920 INFO L349 Elim1Store]: treesize reduction 16, result has 91.6 percent of original size [2024-11-24 00:54:35,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 273 treesize of output 362 [2024-11-24 00:54:35,981 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-24 00:54:35,987 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-24 00:54:36,203 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:54:36,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 170 treesize of output 259 [2024-11-24 00:56:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:56:05,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165575876] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:56:05,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:56:05,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 17] total 53 [2024-11-24 00:56:05,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369036486] [2024-11-24 00:56:05,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:56:05,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-24 00:56:05,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:56:05,836 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-24 00:56:05,838 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=2501, Unknown=4, NotChecked=0, Total=2862 [2024-11-24 00:56:07,496 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-11-24 00:56:07,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 325 flow. Second operand has 54 states, 54 states have (on average 6.925925925925926) internal successors, (374), 54 states have internal predecessors, (374), 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) [2024-11-24 00:56:07,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:56:07,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-11-24 00:56:07,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:56:29,496 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] [2024-11-24 00:56:40,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:56:42,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:56:48,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:56:53,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:56:57,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:57:00,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:57:12,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:57:20,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:57:31,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:57:46,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:58:10,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:58:15,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:58:20,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.67s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:58:22,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:58:25,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:58:30,864 INFO L124 PetriNetUnfolderBase]: 6895/11942 cut-off events. [2024-11-24 00:58:30,864 INFO L125 PetriNetUnfolderBase]: For 15100/15100 co-relation queries the response was YES. [2024-11-24 00:58:30,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38468 conditions, 11942 events. 6895/11942 cut-off events. For 15100/15100 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 79439 event pairs, 487 based on Foata normal form. 57/11293 useless extension candidates. Maximal degree in co-relation 33575. Up to 2226 conditions per place. [2024-11-24 00:58:30,952 INFO L140 encePairwiseOnDemand]: 13/31 looper letters, 715 selfloop transitions, 402 changer transitions 313/1433 dead transitions. [2024-11-24 00:58:30,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1433 transitions, 9581 flow [2024-11-24 00:58:30,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2024-11-24 00:58:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2024-11-24 00:58:30,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 2283 transitions. [2024-11-24 00:58:30,964 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3815811465819823 [2024-11-24 00:58:30,966 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 325 flow. Second operand 193 states and 2283 transitions. [2024-11-24 00:58:30,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1433 transitions, 9581 flow [2024-11-24 00:58:31,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 1433 transitions, 9351 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-11-24 00:58:31,080 INFO L231 Difference]: Finished difference. Result has 386 places, 519 transitions, 5378 flow [2024-11-24 00:58:31,084 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=193, PETRI_FLOW=5378, PETRI_PLACES=386, PETRI_TRANSITIONS=519} [2024-11-24 00:58:31,085 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 356 predicate places. [2024-11-24 00:58:31,085 INFO L471 AbstractCegarLoop]: Abstraction has has 386 places, 519 transitions, 5378 flow [2024-11-24 00:58:31,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 6.925925925925926) internal successors, (374), 54 states have internal predecessors, (374), 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) [2024-11-24 00:58:31,085 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:58:31,085 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-24 00:58:31,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-24 00:58:31,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:58:31,286 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 00:58:31,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:58:31,287 INFO L85 PathProgramCache]: Analyzing trace with hash -587295259, now seen corresponding path program 7 times [2024-11-24 00:58:31,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:58:31,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049337573] [2024-11-24 00:58:31,287 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:58:31,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:58:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:58:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:58:34,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:58:34,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049337573] [2024-11-24 00:58:34,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049337573] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:58:34,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056052585] [2024-11-24 00:58:34,550 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:58:34,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:58:34,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:58:34,553 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:58:34,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 00:58:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:58:34,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-24 00:58:34,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:58:41,946 INFO L349 Elim1Store]: treesize reduction 41, result has 54.9 percent of original size [2024-11-24 00:58:41,946 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 [2024-11-24 00:58:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:58:42,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:58:48,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:58:48,923 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 [2024-11-24 01:00:46,723 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-24 01:00:46,724 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-24 01:00:46,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-11-24 01:00:46,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-24 01:00:46,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:46,925 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_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/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:140) 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:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) 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:317) 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:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) 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:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) 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 [2024-11-24 01:00:46,932 INFO L158 Benchmark]: Toolchain (without parser) took 522978.14ms. Allocated memory was 142.6MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 117.4MB in the beginning and 793.1MB in the end (delta: -675.7MB). Peak memory consumption was 890.0MB. Max. memory is 16.1GB. [2024-11-24 01:00:46,932 INFO L158 Benchmark]: CDTParser took 0.42ms. Allocated memory is still 117.4MB. Free memory is still 73.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-24 01:00:46,932 INFO L158 Benchmark]: CACSL2BoogieTranslator took 307.21ms. Allocated memory is still 142.6MB. Free memory was 117.3MB in the beginning and 105.0MB in the end (delta: 12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-24 01:00:46,932 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.42ms. Allocated memory is still 142.6MB. Free memory was 105.0MB in the beginning and 103.3MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-24 01:00:46,933 INFO L158 Benchmark]: Boogie Preprocessor took 61.99ms. Allocated memory is still 142.6MB. Free memory was 103.3MB in the beginning and 101.2MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-24 01:00:46,933 INFO L158 Benchmark]: RCFGBuilder took 1001.78ms. Allocated memory is still 142.6MB. Free memory was 101.0MB in the beginning and 49.0MB in the end (delta: 52.0MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2024-11-24 01:00:46,934 INFO L158 Benchmark]: TraceAbstraction took 521560.05ms. Allocated memory was 142.6MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 48.3MB in the beginning and 793.1MB in the end (delta: -744.8MB). Peak memory consumption was 822.9MB. Max. memory is 16.1GB. [2024-11-24 01:00:46,935 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42ms. Allocated memory is still 117.4MB. Free memory is still 73.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 307.21ms. Allocated memory is still 142.6MB. Free memory was 117.3MB in the beginning and 105.0MB in the end (delta: 12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.42ms. Allocated memory is still 142.6MB. Free memory was 105.0MB in the beginning and 103.3MB in the end (delta: 1.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.99ms. Allocated memory is still 142.6MB. Free memory was 103.3MB in the beginning and 101.2MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 1001.78ms. Allocated memory is still 142.6MB. Free memory was 101.0MB in the beginning and 49.0MB in the end (delta: 52.0MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. * TraceAbstraction took 521560.05ms. Allocated memory was 142.6MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 48.3MB in the beginning and 793.1MB in the end (delta: -744.8MB). Peak memory consumption was 822.9MB. 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_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/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_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC --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 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 01:00:50,017 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 01:00:50,174 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-24 01:00:50,188 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 01:00:50,188 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 01:00:50,269 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 01:00:50,273 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 01:00:50,273 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 01:00:50,274 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 01:00:50,274 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 01:00:50,274 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 01:00:50,274 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 01:00:50,274 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 01:00:50,274 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 01:00:50,275 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 01:00:50,277 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 01:00:50,281 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-24 01:00:50,281 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 01:00:50,281 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 01:00:50,281 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 01:00:50,281 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-24 01:00:50,282 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 01:00:50,282 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-24 01:00:50,282 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-24 01:00:50,282 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-24 01:00:50,282 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-24 01:00:50,282 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 01:00:50,282 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-24 01:00:50,282 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 01:00:50,282 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 01:00:50,283 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 01:00:50,283 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:00:50,283 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:00:50,283 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:00:50,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:00:50,283 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 01:00:50,283 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:00:50,284 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:00:50,284 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:00:50,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:00:50,295 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 01:00:50,297 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 01:00:50,297 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-24 01:00:50,301 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-24 01:00:50,301 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-24 01:00:50,301 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-24 01:00:50,301 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 01:00:50,301 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 01:00:50,301 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 01:00:50,302 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 01:00:50,302 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC 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 -> 69f7b2e4777088b02df05d348ae0a210dcd9618a97428b10acd3ef63d9199610 [2024-11-24 01:00:50,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 01:00:50,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 01:00:50,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 01:00:50,711 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 01:00:50,712 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 01:00:50,713 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2024-11-24 01:00:54,029 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/data/f834c4c2f/873536ebd8d445739c19afb0dba6dd29/FLAG96e58f317 [2024-11-24 01:00:54,333 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 01:00:54,334 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2024-11-24 01:00:54,343 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/data/f834c4c2f/873536ebd8d445739c19afb0dba6dd29/FLAG96e58f317 [2024-11-24 01:00:54,366 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/data/f834c4c2f/873536ebd8d445739c19afb0dba6dd29 [2024-11-24 01:00:54,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 01:00:54,371 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 01:00:54,372 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 01:00:54,373 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 01:00:54,378 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 01:00:54,379 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:00:54" (1/1) ... [2024-11-24 01:00:54,380 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3969831e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:54, skipping insertion in model container [2024-11-24 01:00:54,381 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:00:54" (1/1) ... [2024-11-24 01:00:54,400 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 01:00:54,685 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_d87a8f89-a714-4307-b3aa-262163a9e913/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2950,2963] [2024-11-24 01:00:54,698 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:00:54,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:00:54,726 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 01:00:54,770 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_d87a8f89-a714-4307-b3aa-262163a9e913/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c[2950,2963] [2024-11-24 01:00:54,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:00:54,806 INFO L204 MainTranslator]: Completed translation [2024-11-24 01:00:54,807 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:54 WrapperNode [2024-11-24 01:00:54,807 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 01:00:54,809 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 01:00:54,810 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 01:00:54,810 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 01:00:54,822 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:54" (1/1) ... [2024-11-24 01:00:54,838 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:54" (1/1) ... [2024-11-24 01:00:54,883 INFO L138 Inliner]: procedures = 25, calls = 35, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 178 [2024-11-24 01:00:54,887 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 01:00:54,887 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 01:00:54,888 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 01:00:54,888 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 01:00:54,899 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:54" (1/1) ... [2024-11-24 01:00:54,899 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:54" (1/1) ... [2024-11-24 01:00:54,910 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:54" (1/1) ... [2024-11-24 01:00:54,945 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]. [2024-11-24 01:00:54,946 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:54" (1/1) ... [2024-11-24 01:00:54,946 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:54" (1/1) ... [2024-11-24 01:00:54,965 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:54" (1/1) ... [2024-11-24 01:00:54,967 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:54" (1/1) ... [2024-11-24 01:00:54,973 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:54" (1/1) ... [2024-11-24 01:00:54,981 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:54" (1/1) ... [2024-11-24 01:00:54,982 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:54" (1/1) ... [2024-11-24 01:00:54,989 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 01:00:54,990 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 01:00:54,991 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 01:00:54,991 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 01:00:54,992 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:54" (1/1) ... [2024-11-24 01:00:55,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:00:55,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:00:55,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 01:00:55,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 01:00:55,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 01:00:55,077 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-24 01:00:55,077 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-24 01:00:55,077 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-24 01:00:55,077 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-24 01:00:55,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-24 01:00:55,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-24 01:00:55,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-24 01:00:55,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-24 01:00:55,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-24 01:00:55,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-24 01:00:55,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-24 01:00:55,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 01:00:55,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 01:00:55,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-24 01:00:55,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-24 01:00:55,081 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-24 01:00:55,205 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 01:00:55,207 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 01:00:55,790 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-24 01:00:55,791 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 01:00:56,193 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 01:00:56,193 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-24 01:00:56,194 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:00:56 BoogieIcfgContainer [2024-11-24 01:00:56,194 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 01:00:56,196 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 01:00:56,196 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 01:00:56,202 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 01:00:56,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 01:00:54" (1/3) ... [2024-11-24 01:00:56,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1fc215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:00:56, skipping insertion in model container [2024-11-24 01:00:56,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:00:54" (2/3) ... [2024-11-24 01:00:56,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1fc215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:00:56, skipping insertion in model container [2024-11-24 01:00:56,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:00:56" (3/3) ... [2024-11-24 01:00:56,204 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2024-11-24 01:00:56,221 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 01:00:56,222 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-inc-subseq.wvr.c that has 3 procedures, 27 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-24 01:00:56,223 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-24 01:00:56,296 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-24 01:00:56,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 31 transitions, 76 flow [2024-11-24 01:00:56,374 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2024-11-24 01:00:56,376 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-24 01:00:56,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 29 events. 5/29 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 43 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-11-24 01:00:56,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 31 transitions, 76 flow [2024-11-24 01:00:56,384 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 28 transitions, 68 flow [2024-11-24 01:00:56,397 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 01:00:56,411 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;@727da60d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 01:00:56,411 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-24 01:00:56,454 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-24 01:00:56,457 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2024-11-24 01:00:56,457 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-24 01:00:56,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:00:56,458 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:00:56,459 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:00:56,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:00:56,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1966712201, now seen corresponding path program 1 times [2024-11-24 01:00:56,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:00:56,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330601229] [2024-11-24 01:00:56,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:56,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:56,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:00:56,490 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:00:56,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 01:00:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:00:56,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-24 01:00:56,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:00:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:00:56,795 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:00:56,796 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:00:56,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330601229] [2024-11-24 01:00:56,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330601229] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:00:56,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:00:56,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 01:00:56,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202812275] [2024-11-24 01:00:56,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:00:56,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 01:00:56,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:00:56,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 01:00:56,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 01:00:56,880 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-24 01:00:56,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-11-24 01:00:56,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:00:56,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-24 01:00:56,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:00:57,192 INFO L124 PetriNetUnfolderBase]: 175/325 cut-off events. [2024-11-24 01:00:57,193 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-24 01:00:57,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 637 conditions, 325 events. 175/325 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1277 event pairs, 57 based on Foata normal form. 1/262 useless extension candidates. Maximal degree in co-relation 578. Up to 144 conditions per place. [2024-11-24 01:00:57,201 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 31 selfloop transitions, 2 changer transitions 2/41 dead transitions. [2024-11-24 01:00:57,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 170 flow [2024-11-24 01:00:57,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:00:57,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:00:57,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-11-24 01:00:57,227 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6451612903225806 [2024-11-24 01:00:57,229 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 68 flow. Second operand 3 states and 60 transitions. [2024-11-24 01:00:57,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 170 flow [2024-11-24 01:00:57,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 41 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 01:00:57,242 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 72 flow [2024-11-24 01:00:57,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2024-11-24 01:00:57,252 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2024-11-24 01:00:57,252 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 72 flow [2024-11-24 01:00:57,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-11-24 01:00:57,253 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:00:57,253 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:00:57,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 01:00:57,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:57,454 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:00:57,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:00:57,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2132097818, now seen corresponding path program 1 times [2024-11-24 01:00:57,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:00:57,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518870513] [2024-11-24 01:00:57,457 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:57,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:57,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:00:57,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:00:57,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 01:00:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:00:57,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 01:00:57,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:00:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:00:57,766 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:00:57,766 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:00:57,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518870513] [2024-11-24 01:00:57,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518870513] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:00:57,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:00:57,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:00:57,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974043266] [2024-11-24 01:00:57,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:00:57,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:00:57,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:00:57,771 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:00:57,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:00:57,799 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-24 01:00:57,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 72 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2024-11-24 01:00:57,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:00:57,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-24 01:00:57,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:00:58,077 INFO L124 PetriNetUnfolderBase]: 257/451 cut-off events. [2024-11-24 01:00:58,077 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-24 01:00:58,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 961 conditions, 451 events. 257/451 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1984 event pairs, 77 based on Foata normal form. 0/385 useless extension candidates. Maximal degree in co-relation 447. Up to 248 conditions per place. [2024-11-24 01:00:58,083 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-11-24 01:00:58,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 176 flow [2024-11-24 01:00:58,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:00:58,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:00:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2024-11-24 01:00:58,086 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2024-11-24 01:00:58,086 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 72 flow. Second operand 5 states and 75 transitions. [2024-11-24 01:00:58,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 176 flow [2024-11-24 01:00:58,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 42 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 01:00:58,089 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 86 flow [2024-11-24 01:00:58,090 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-11-24 01:00:58,090 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2024-11-24 01:00:58,091 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 86 flow [2024-11-24 01:00:58,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2024-11-24 01:00:58,091 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:00:58,092 INFO L206 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] [2024-11-24 01:00:58,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-24 01:00:58,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:58,293 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:00:58,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:00:58,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1761241815, now seen corresponding path program 1 times [2024-11-24 01:00:58,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:00:58,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674823580] [2024-11-24 01:00:58,294 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:58,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:58,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:00:58,297 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:00:58,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 01:00:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:00:58,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-24 01:00:58,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:00:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:00:58,510 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:00:58,510 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:00:58,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674823580] [2024-11-24 01:00:58,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674823580] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:00:58,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:00:58,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:00:58,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663596026] [2024-11-24 01:00:58,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:00:58,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:00:58,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:00:58,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:00:58,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:00:58,529 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-24 01:00:58,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-24 01:00:58,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:00:58,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-24 01:00:58,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:00:58,967 INFO L124 PetriNetUnfolderBase]: 508/869 cut-off events. [2024-11-24 01:00:58,967 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2024-11-24 01:00:58,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1916 conditions, 869 events. 508/869 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4059 event pairs, 62 based on Foata normal form. 42/852 useless extension candidates. Maximal degree in co-relation 940. Up to 356 conditions per place. [2024-11-24 01:00:58,979 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 45 selfloop transitions, 9 changer transitions 0/58 dead transitions. [2024-11-24 01:00:58,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 58 transitions, 271 flow [2024-11-24 01:00:58,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:00:58,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:00:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-11-24 01:00:58,983 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-24 01:00:58,983 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 86 flow. Second operand 5 states and 80 transitions. [2024-11-24 01:00:58,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 58 transitions, 271 flow [2024-11-24 01:00:58,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 58 transitions, 264 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 01:00:58,990 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 138 flow [2024-11-24 01:00:58,990 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2024-11-24 01:00:58,991 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-11-24 01:00:58,991 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 138 flow [2024-11-24 01:00:58,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-24 01:00:58,991 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:00:58,991 INFO L206 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] [2024-11-24 01:00:59,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-24 01:00:59,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:59,192 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:00:59,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:00:59,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1054430319, now seen corresponding path program 2 times [2024-11-24 01:00:59,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:00:59,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280099599] [2024-11-24 01:00:59,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:00:59,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:59,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:00:59,197 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:00:59,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 01:00:59,328 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:00:59,328 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:00:59,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-24 01:00:59,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:00:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:00:59,392 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:00:59,392 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:00:59,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280099599] [2024-11-24 01:00:59,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280099599] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:00:59,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:00:59,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 01:00:59,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750447634] [2024-11-24 01:00:59,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:00:59,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 01:00:59,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:00:59,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 01:00:59,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 01:00:59,406 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-24 01:00:59,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2024-11-24 01:00:59,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:00:59,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-24 01:00:59,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:00:59,681 INFO L124 PetriNetUnfolderBase]: 447/779 cut-off events. [2024-11-24 01:00:59,682 INFO L125 PetriNetUnfolderBase]: For 552/567 co-relation queries the response was YES. [2024-11-24 01:00:59,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2022 conditions, 779 events. 447/779 cut-off events. For 552/567 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3614 event pairs, 295 based on Foata normal form. 2/705 useless extension candidates. Maximal degree in co-relation 1011. Up to 699 conditions per place. [2024-11-24 01:00:59,693 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 26 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-24 01:00:59,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 196 flow [2024-11-24 01:00:59,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:00:59,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:00:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-11-24 01:00:59,696 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-24 01:00:59,696 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 138 flow. Second operand 3 states and 48 transitions. [2024-11-24 01:00:59,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 196 flow [2024-11-24 01:00:59,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 196 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-24 01:00:59,704 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 150 flow [2024-11-24 01:00:59,706 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2024-11-24 01:00:59,707 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-11-24 01:00:59,708 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 150 flow [2024-11-24 01:00:59,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2024-11-24 01:00:59,709 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:00:59,709 INFO L206 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] [2024-11-24 01:00:59,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-24 01:00:59,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:59,910 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:00:59,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:00:59,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1906845710, now seen corresponding path program 1 times [2024-11-24 01:00:59,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:00:59,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117483690] [2024-11-24 01:00:59,911 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:00:59,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:00:59,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:00:59,914 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:00:59,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 01:01:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:01:00,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-24 01:01:00,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:01:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:01:00,189 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:01:00,189 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:01:00,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117483690] [2024-11-24 01:01:00,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117483690] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:01:00,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:01:00,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 01:01:00,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474770053] [2024-11-24 01:01:00,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:01:00,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:01:00,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:01:00,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:01:00,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:01:00,192 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-24 01:01:00,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:01:00,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:01:00,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-24 01:01:00,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:01:00,559 INFO L124 PetriNetUnfolderBase]: 520/945 cut-off events. [2024-11-24 01:01:00,559 INFO L125 PetriNetUnfolderBase]: For 723/749 co-relation queries the response was YES. [2024-11-24 01:01:00,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2497 conditions, 945 events. 520/945 cut-off events. For 723/749 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4621 event pairs, 355 based on Foata normal form. 43/894 useless extension candidates. Maximal degree in co-relation 2007. Up to 700 conditions per place. [2024-11-24 01:01:00,568 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 27 selfloop transitions, 2 changer transitions 20/58 dead transitions. [2024-11-24 01:01:00,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 58 transitions, 341 flow [2024-11-24 01:01:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:01:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:01:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-11-24 01:01:00,570 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-11-24 01:01:00,570 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 150 flow. Second operand 4 states and 72 transitions. [2024-11-24 01:01:00,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 58 transitions, 341 flow [2024-11-24 01:01:00,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 58 transitions, 333 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-24 01:01:00,576 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 162 flow [2024-11-24 01:01:00,576 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2024-11-24 01:01:00,577 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2024-11-24 01:01:00,577 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 162 flow [2024-11-24 01:01:00,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:01:00,578 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:01:00,578 INFO L206 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] [2024-11-24 01:01:00,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-24 01:01:00,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:01:00,779 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:01:00,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:01:00,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1289220391, now seen corresponding path program 1 times [2024-11-24 01:01:00,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:01:00,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508686392] [2024-11-24 01:01:00,781 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:01:00,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:01:00,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:01:00,784 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:01:00,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 01:01:00,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:01:00,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:01:00,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:01:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:01:01,206 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:01:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:01:01,583 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:01:01,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508686392] [2024-11-24 01:01:01,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508686392] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:01:01,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:01:01,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-11-24 01:01:01,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307009134] [2024-11-24 01:01:01,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:01:01,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 01:01:01,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:01:01,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 01:01:01,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-11-24 01:01:01,685 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-24 01:01:01,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 162 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:01:01,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:01:01,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-24 01:01:01,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:01:02,166 INFO L124 PetriNetUnfolderBase]: 487/909 cut-off events. [2024-11-24 01:01:02,167 INFO L125 PetriNetUnfolderBase]: For 858/917 co-relation queries the response was YES. [2024-11-24 01:01:02,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2584 conditions, 909 events. 487/909 cut-off events. For 858/917 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4385 event pairs, 203 based on Foata normal form. 52/883 useless extension candidates. Maximal degree in co-relation 2564. Up to 519 conditions per place. [2024-11-24 01:01:02,177 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 53 selfloop transitions, 6 changer transitions 8/76 dead transitions. [2024-11-24 01:01:02,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 76 transitions, 465 flow [2024-11-24 01:01:02,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:01:02,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 01:01:02,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-11-24 01:01:02,182 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-11-24 01:01:02,182 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 162 flow. Second operand 6 states and 102 transitions. [2024-11-24 01:01:02,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 76 transitions, 465 flow [2024-11-24 01:01:02,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 76 transitions, 461 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-24 01:01:02,189 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 205 flow [2024-11-24 01:01:02,189 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=205, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-11-24 01:01:02,190 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2024-11-24 01:01:02,190 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 205 flow [2024-11-24 01:01:02,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:01:02,190 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:01:02,190 INFO L206 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] [2024-11-24 01:01:02,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-24 01:01:02,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:01:02,391 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:01:02,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:01:02,392 INFO L85 PathProgramCache]: Analyzing trace with hash 755596942, now seen corresponding path program 1 times [2024-11-24 01:01:02,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:01:02,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366894201] [2024-11-24 01:01:02,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:01:02,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:01:02,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:01:02,397 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:01:02,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 01:01:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:01:02,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-24 01:01:02,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:01:03,712 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-24 01:01:03,714 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-24 01:01:03,743 INFO L349 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2024-11-24 01:01:03,744 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 [2024-11-24 01:01:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:01:03,855 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:01:06,258 INFO L349 Elim1Store]: treesize reduction 23, result has 74.7 percent of original size [2024-11-24 01:01:06,259 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 [2024-11-24 01:01:06,735 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2024-11-24 01:01:06,736 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 [2024-11-24 01:01:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:01:07,612 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:01:07,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366894201] [2024-11-24 01:01:07,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366894201] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:01:07,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:01:07,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2024-11-24 01:01:07,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588888156] [2024-11-24 01:01:07,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:01:07,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 01:01:07,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:01:07,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 01:01:07,619 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2024-11-24 01:01:07,973 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-11-24 01:01:07,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 205 flow. Second operand has 19 states, 19 states have (on average 7.526315789473684) internal successors, (143), 19 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) [2024-11-24 01:01:07,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:01:07,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-11-24 01:01:07,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:01:14,941 INFO L124 PetriNetUnfolderBase]: 1680/2829 cut-off events. [2024-11-24 01:01:14,942 INFO L125 PetriNetUnfolderBase]: For 2897/2897 co-relation queries the response was YES. [2024-11-24 01:01:14,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8636 conditions, 2829 events. 1680/2829 cut-off events. For 2897/2897 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14784 event pairs, 331 based on Foata normal form. 2/2665 useless extension candidates. Maximal degree in co-relation 5747. Up to 752 conditions per place. [2024-11-24 01:01:14,959 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 68 selfloop transitions, 11 changer transitions 158/240 dead transitions. [2024-11-24 01:01:14,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 240 transitions, 1572 flow [2024-11-24 01:01:14,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-24 01:01:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-24 01:01:14,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 310 transitions. [2024-11-24 01:01:14,963 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43478260869565216 [2024-11-24 01:01:14,963 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 205 flow. Second operand 23 states and 310 transitions. [2024-11-24 01:01:14,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 240 transitions, 1572 flow [2024-11-24 01:01:14,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 240 transitions, 1552 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-24 01:01:14,973 INFO L231 Difference]: Finished difference. Result has 87 places, 46 transitions, 335 flow [2024-11-24 01:01:14,974 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=335, PETRI_PLACES=87, PETRI_TRANSITIONS=46} [2024-11-24 01:01:14,974 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2024-11-24 01:01:14,975 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 46 transitions, 335 flow [2024-11-24 01:01:14,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.526315789473684) internal successors, (143), 19 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) [2024-11-24 01:01:14,975 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:01:14,975 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-24 01:01:14,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-24 01:01:15,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:01:15,177 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:01:15,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:01:15,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1427694583, now seen corresponding path program 2 times [2024-11-24 01:01:15,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:01:15,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467506997] [2024-11-24 01:01:15,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:01:15,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:01:15,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:01:15,183 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:01:15,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d87a8f89-a714-4307-b3aa-262163a9e913/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process