./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/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_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/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_fe382389-73cf-4949-95c2-d352d5697e31/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 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 18:30:47,644 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 18:30:47,738 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-23 18:30:47,743 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 18:30:47,744 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 18:30:47,784 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 18:30:47,785 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 18:30:47,786 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 18:30:47,786 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 18:30:47,786 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 18:30:47,787 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 18:30:47,787 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 18:30:47,788 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 18:30:47,788 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 18:30:47,788 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 18:30:47,788 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 18:30:47,788 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 18:30:47,788 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 18:30:47,788 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 18:30:47,789 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 18:30:47,789 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 18:30:47,789 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 18:30:47,789 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 18:30:47,790 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 18:30:47,790 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 18:30:47,790 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 18:30:47,790 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 18:30:47,790 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 18:30:47,790 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 18:30:47,790 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:30:47,791 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:30:47,791 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:30:47,791 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:30:47,791 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 18:30:47,791 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:30:47,792 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:30:47,792 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:30:47,792 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:30:47,792 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 18:30:47,792 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 18:30:47,792 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 18:30:47,792 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 18:30:47,792 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 18:30:47,792 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 18:30:47,792 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 18:30:47,792 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 18:30:47,792 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 18:30:47,792 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 18:30:47,793 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_fe382389-73cf-4949-95c2-d352d5697e31/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 -> 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b [2024-11-23 18:30:48,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 18:30:48,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 18:30:48,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 18:30:48,125 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 18:30:48,126 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 18:30:48,128 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2024-11-23 18:30:51,100 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/data/070725b23/d08bda309b664bafa7956257942c3690/FLAGdf9552d69 [2024-11-23 18:30:51,364 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 18:30:51,365 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2024-11-23 18:30:51,372 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/data/070725b23/d08bda309b664bafa7956257942c3690/FLAGdf9552d69 [2024-11-23 18:30:51,690 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/data/070725b23/d08bda309b664bafa7956257942c3690 [2024-11-23 18:30:51,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 18:30:51,696 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 18:30:51,698 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 18:30:51,699 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 18:30:51,704 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 18:30:51,705 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:30:51" (1/1) ... [2024-11-23 18:30:51,708 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d9d548d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:30:51, skipping insertion in model container [2024-11-23 18:30:51,709 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:30:51" (1/1) ... [2024-11-23 18:30:51,733 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 18:30:51,957 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_fe382389-73cf-4949-95c2-d352d5697e31/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2950,2963] [2024-11-23 18:30:51,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:30:51,983 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 18:30:52,015 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_fe382389-73cf-4949-95c2-d352d5697e31/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2950,2963] [2024-11-23 18:30:52,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:30:52,040 INFO L204 MainTranslator]: Completed translation [2024-11-23 18:30:52,040 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:30:52 WrapperNode [2024-11-23 18:30:52,042 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 18:30:52,043 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 18:30:52,043 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 18:30:52,043 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 18:30:52,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:30:52" (1/1) ... [2024-11-23 18:30:52,060 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:30:52" (1/1) ... [2024-11-23 18:30:52,091 INFO L138 Inliner]: procedures = 23, calls = 35, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 183 [2024-11-23 18:30:52,092 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 18:30:52,092 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 18:30:52,092 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 18:30:52,092 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 18:30:52,105 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:30:52" (1/1) ... [2024-11-23 18:30:52,106 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:30:52" (1/1) ... [2024-11-23 18:30:52,112 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:30:52" (1/1) ... [2024-11-23 18:30:52,137 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]. [2024-11-23 18:30:52,137 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:30:52" (1/1) ... [2024-11-23 18:30:52,138 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:30:52" (1/1) ... [2024-11-23 18:30:52,148 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:30:52" (1/1) ... [2024-11-23 18:30:52,149 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:30:52" (1/1) ... [2024-11-23 18:30:52,156 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:30:52" (1/1) ... [2024-11-23 18:30:52,161 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:30:52" (1/1) ... [2024-11-23 18:30:52,162 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:30:52" (1/1) ... [2024-11-23 18:30:52,168 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 18:30:52,169 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 18:30:52,173 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 18:30:52,173 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 18:30:52,174 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:30:52" (1/1) ... [2024-11-23 18:30:52,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:30:52,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:30:52,214 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 18:30:52,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 18:30:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 18:30:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 18:30:52,246 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 18:30:52,246 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 18:30:52,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 18:30:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 18:30:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 18:30:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 18:30:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 18:30:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 18:30:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 18:30:52,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 18:30:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 18:30:52,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 18:30:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 18:30:52,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 18:30:52,250 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 18:30:52,374 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 18:30:52,378 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 18:30:52,844 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 18:30:52,846 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 18:30:53,258 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 18:30:53,258 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-23 18:30:53,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:30:53 BoogieIcfgContainer [2024-11-23 18:30:53,259 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 18:30:53,264 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 18:30:53,264 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 18:30:53,270 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 18:30:53,270 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 06:30:51" (1/3) ... [2024-11-23 18:30:53,271 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35754010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:30:53, skipping insertion in model container [2024-11-23 18:30:53,271 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:30:52" (2/3) ... [2024-11-23 18:30:53,272 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35754010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:30:53, skipping insertion in model container [2024-11-23 18:30:53,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:30:53" (3/3) ... [2024-11-23 18:30:53,274 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2024-11-23 18:30:53,291 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 18:30:53,292 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-dec-subseq.wvr.c that has 3 procedures, 27 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-23 18:30:53,293 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 18:30:53,359 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-23 18:30:53,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 31 transitions, 76 flow [2024-11-23 18:30:53,450 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2024-11-23 18:30:53,454 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-23 18:30:53,458 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. [2024-11-23 18:30:53,458 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 31 transitions, 76 flow [2024-11-23 18:30:53,461 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 28 transitions, 68 flow [2024-11-23 18:30:53,479 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 18:30:53,496 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;@122028ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 18:30:53,496 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-23 18:30:53,515 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 18:30:53,515 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2024-11-23 18:30:53,515 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-23 18:30:53,515 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:30:53,516 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:30:53,516 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:30:53,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:30:53,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1515608969, now seen corresponding path program 1 times [2024-11-23 18:30:53,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:30:53,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969164617] [2024-11-23 18:30:53,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:30:53,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:30:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:30:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:30:53,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:30:53,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969164617] [2024-11-23 18:30:53,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969164617] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:30:53,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:30:53,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:30:53,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647962386] [2024-11-23 18:30:53,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:30:53,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:30:53,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:30:53,978 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:30:53,979 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:30:53,992 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-23 18:30:53,994 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) [2024-11-23 18:30:53,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:30:53,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-23 18:30:53,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:30:54,242 INFO L124 PetriNetUnfolderBase]: 202/345 cut-off events. [2024-11-23 18:30:54,243 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-23 18:30:54,246 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. [2024-11-23 18:30:54,252 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 31 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2024-11-23 18:30:54,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 163 flow [2024-11-23 18:30:54,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:30:54,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:30:54,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-23 18:30:54,269 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5403225806451613 [2024-11-23 18:30:54,271 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 68 flow. Second operand 4 states and 67 transitions. [2024-11-23 18:30:54,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 163 flow [2024-11-23 18:30:54,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 40 transitions, 153 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 18:30:54,282 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 74 flow [2024-11-23 18:30:54,284 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} [2024-11-23 18:30:54,289 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2024-11-23 18:30:54,290 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 74 flow [2024-11-23 18:30:54,290 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) [2024-11-23 18:30:54,290 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:30:54,290 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:30:54,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 18:30:54,290 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:30:54,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:30:54,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1423681736, now seen corresponding path program 1 times [2024-11-23 18:30:54,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:30:54,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477546140] [2024-11-23 18:30:54,293 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:30:54,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:30:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:30:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:30:54,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:30:54,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477546140] [2024-11-23 18:30:54,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477546140] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:30:54,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:30:54,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:30:54,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644279150] [2024-11-23 18:30:54,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:30:54,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:30:54,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:30:54,567 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:30:54,567 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:30:54,573 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-23 18:30:54,573 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) [2024-11-23 18:30:54,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:30:54,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-23 18:30:54,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:30:54,729 INFO L124 PetriNetUnfolderBase]: 202/370 cut-off events. [2024-11-23 18:30:54,729 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-23 18:30:54,733 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. [2024-11-23 18:30:54,736 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 22 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-11-23 18:30:54,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 124 flow [2024-11-23 18:30:54,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:30:54,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:30:54,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-11-23 18:30:54,739 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-23 18:30:54,739 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 74 flow. Second operand 3 states and 48 transitions. [2024-11-23 18:30:54,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 124 flow [2024-11-23 18:30:54,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:30:54,742 INFO L231 Difference]: Finished difference. Result has 31 places, 30 transitions, 82 flow [2024-11-23 18:30:54,743 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} [2024-11-23 18:30:54,744 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-11-23 18:30:54,744 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 82 flow [2024-11-23 18:30:54,744 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) [2024-11-23 18:30:54,745 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:30:54,745 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] [2024-11-23 18:30:54,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 18:30:54,746 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:30:54,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:30:54,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1301693413, now seen corresponding path program 1 times [2024-11-23 18:30:54,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:30:54,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802399645] [2024-11-23 18:30:54,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:30:54,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:30:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:30:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:30:54,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:30:54,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802399645] [2024-11-23 18:30:54,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802399645] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:30:54,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:30:54,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:30:54,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809873536] [2024-11-23 18:30:54,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:30:54,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:30:54,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:30:54,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:30:54,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:30:54,973 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-23 18:30:54,973 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) [2024-11-23 18:30:54,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:30:54,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-23 18:30:54,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:30:55,099 INFO L124 PetriNetUnfolderBase]: 257/478 cut-off events. [2024-11-23 18:30:55,099 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-23 18:30:55,100 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. [2024-11-23 18:30:55,103 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 34 selfloop transitions, 2 changer transitions 2/44 dead transitions. [2024-11-23 18:30:55,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 194 flow [2024-11-23 18:30:55,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:30:55,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:30:55,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-11-23 18:30:55,104 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6451612903225806 [2024-11-23 18:30:55,104 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 82 flow. Second operand 3 states and 60 transitions. [2024-11-23 18:30:55,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 194 flow [2024-11-23 18:30:55,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 44 transitions, 190 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-23 18:30:55,106 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 90 flow [2024-11-23 18:30:55,107 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} [2024-11-23 18:30:55,107 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2024-11-23 18:30:55,108 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 90 flow [2024-11-23 18:30:55,108 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) [2024-11-23 18:30:55,108 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:30:55,108 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] [2024-11-23 18:30:55,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 18:30:55,108 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:30:55,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:30:55,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1142856318, now seen corresponding path program 1 times [2024-11-23 18:30:55,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:30:55,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869121584] [2024-11-23 18:30:55,109 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:30:55,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:30:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:30:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:30:55,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:30:55,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869121584] [2024-11-23 18:30:55,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869121584] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:30:55,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:30:55,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:30:55,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316154270] [2024-11-23 18:30:55,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:30:55,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:30:55,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:30:55,201 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:30:55,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:30:55,206 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-23 18:30:55,207 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) [2024-11-23 18:30:55,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:30:55,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-23 18:30:55,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:30:55,343 INFO L124 PetriNetUnfolderBase]: 250/472 cut-off events. [2024-11-23 18:30:55,343 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-11-23 18:30:55,346 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. [2024-11-23 18:30:55,348 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 32 selfloop transitions, 2 changer transitions 4/44 dead transitions. [2024-11-23 18:30:55,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 201 flow [2024-11-23 18:30:55,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:30:55,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:30:55,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-11-23 18:30:55,351 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6344086021505376 [2024-11-23 18:30:55,351 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 90 flow. Second operand 3 states and 59 transitions. [2024-11-23 18:30:55,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 201 flow [2024-11-23 18:30:55,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:30:55,353 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 100 flow [2024-11-23 18:30:55,354 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} [2024-11-23 18:30:55,357 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2024-11-23 18:30:55,358 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 100 flow [2024-11-23 18:30:55,358 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) [2024-11-23 18:30:55,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:30:55,358 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] [2024-11-23 18:30:55,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-23 18:30:55,360 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:30:55,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:30:55,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1028343269, now seen corresponding path program 1 times [2024-11-23 18:30:55,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:30:55,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978765592] [2024-11-23 18:30:55,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:30:55,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:30:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:30:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:30:55,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:30:55,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978765592] [2024-11-23 18:30:55,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978765592] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:30:55,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:30:55,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:30:55,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950864895] [2024-11-23 18:30:55,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:30:55,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:30:55,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:30:55,612 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:30:55,612 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:30:55,612 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-23 18:30:55,612 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) [2024-11-23 18:30:55,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:30:55,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-23 18:30:55,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:30:55,832 INFO L124 PetriNetUnfolderBase]: 307/599 cut-off events. [2024-11-23 18:30:55,835 INFO L125 PetriNetUnfolderBase]: For 77/85 co-relation queries the response was YES. [2024-11-23 18:30:55,836 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. [2024-11-23 18:30:55,839 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 25 selfloop transitions, 2 changer transitions 17/50 dead transitions. [2024-11-23 18:30:55,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 242 flow [2024-11-23 18:30:55,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:30:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:30:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-11-23 18:30:55,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-23 18:30:55,843 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 100 flow. Second operand 5 states and 80 transitions. [2024-11-23 18:30:55,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 242 flow [2024-11-23 18:30:55,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:30:55,845 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 114 flow [2024-11-23 18:30:55,845 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} [2024-11-23 18:30:55,846 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 11 predicate places. [2024-11-23 18:30:55,846 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 114 flow [2024-11-23 18:30:55,847 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) [2024-11-23 18:30:55,847 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:30:55,847 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] [2024-11-23 18:30:55,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-23 18:30:55,847 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:30:55,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:30:55,848 INFO L85 PathProgramCache]: Analyzing trace with hash -776053246, now seen corresponding path program 1 times [2024-11-23 18:30:55,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:30:55,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4675724] [2024-11-23 18:30:55,848 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:30:55,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:30:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:30:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:30:57,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:30:57,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4675724] [2024-11-23 18:30:57,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4675724] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:30:57,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261455029] [2024-11-23 18:30:57,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:30:57,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:30:57,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:30:57,452 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:30:57,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 18:30:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:30:57,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-23 18:30:57,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:30:57,633 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 [2024-11-23 18:30:57,735 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 [2024-11-23 18:30:57,821 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 18:30:57,822 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 [2024-11-23 18:30:57,883 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 [2024-11-23 18:30:58,712 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 [2024-11-23 18:30:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:30:58,758 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:31:04,341 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-11-23 18:31:04,341 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 [2024-11-23 18:31:04,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:31:04,383 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 [2024-11-23 18:31:04,822 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 [2024-11-23 18:31:04,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 18:31:05,017 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:31:05,017 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 154 treesize of output 178 [2024-11-23 18:31:06,530 INFO L349 Elim1Store]: treesize reduction 16, result has 65.2 percent of original size [2024-11-23 18:31:06,531 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 [2024-11-23 18:31:06,561 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:31:06,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 144 [2024-11-23 18:31:06,895 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 [2024-11-23 18:31:06,917 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:31:06,918 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 [2024-11-23 18:31:06,964 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:31:06,965 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 [2024-11-23 18:31:07,003 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 [2024-11-23 18:31:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:31:07,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261455029] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:31:07,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:31:07,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 28 [2024-11-23 18:31:07,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865666333] [2024-11-23 18:31:07,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:31:07,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-23 18:31:07,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:31:07,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-23 18:31:07,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=663, Unknown=1, NotChecked=0, Total=812 [2024-11-23 18:31:07,216 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-11-23 18:31:07,217 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) [2024-11-23 18:31:07,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:31:07,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-11-23 18:31:07,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:31:12,423 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] [2024-11-23 18:31:20,628 INFO L124 PetriNetUnfolderBase]: 1347/2283 cut-off events. [2024-11-23 18:31:20,630 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2024-11-23 18:31:20,637 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. [2024-11-23 18:31:20,648 INFO L140 encePairwiseOnDemand]: 15/31 looper letters, 197 selfloop transitions, 64 changer transitions 85/349 dead transitions. [2024-11-23 18:31:20,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 349 transitions, 1697 flow [2024-11-23 18:31:20,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-23 18:31:20,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-11-23 18:31:20,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 544 transitions. [2024-11-23 18:31:20,658 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42800944138473646 [2024-11-23 18:31:20,658 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 114 flow. Second operand 41 states and 544 transitions. [2024-11-23 18:31:20,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 349 transitions, 1697 flow [2024-11-23 18:31:20,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 349 transitions, 1677 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-11-23 18:31:20,666 INFO L231 Difference]: Finished difference. Result has 100 places, 100 transitions, 639 flow [2024-11-23 18:31:20,666 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} [2024-11-23 18:31:20,667 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 70 predicate places. [2024-11-23 18:31:20,667 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 100 transitions, 639 flow [2024-11-23 18:31:20,667 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) [2024-11-23 18:31:20,667 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:31:20,667 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] [2024-11-23 18:31:20,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 18:31:20,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:31:20,872 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:31:20,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:31:20,873 INFO L85 PathProgramCache]: Analyzing trace with hash 800822541, now seen corresponding path program 2 times [2024-11-23 18:31:20,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:31:20,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130413556] [2024-11-23 18:31:20,873 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:31:20,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:31:20,931 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 18:31:20,931 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:31:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 18:31:21,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:31:21,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130413556] [2024-11-23 18:31:21,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130413556] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:31:21,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:31:21,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-23 18:31:21,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198743433] [2024-11-23 18:31:21,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:31:21,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-23 18:31:21,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:31:21,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-23 18:31:21,452 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-23 18:31:21,515 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-23 18:31:21,515 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) [2024-11-23 18:31:21,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:31:21,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-23 18:31:21,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:31:22,239 INFO L124 PetriNetUnfolderBase]: 747/1472 cut-off events. [2024-11-23 18:31:22,240 INFO L125 PetriNetUnfolderBase]: For 4457/4478 co-relation queries the response was YES. [2024-11-23 18:31:22,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5551 conditions, 1472 events. 747/1472 cut-off events. For 4457/4478 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 7730 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. [2024-11-23 18:31:22,254 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 105 selfloop transitions, 33 changer transitions 6/154 dead transitions. [2024-11-23 18:31:22,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 154 transitions, 1259 flow [2024-11-23 18:31:22,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 18:31:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 18:31:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-11-23 18:31:22,258 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-23 18:31:22,258 INFO L175 Difference]: Start difference. First operand has 100 places, 100 transitions, 639 flow. Second operand 9 states and 144 transitions. [2024-11-23 18:31:22,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 154 transitions, 1259 flow [2024-11-23 18:31:22,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 154 transitions, 1108 flow, removed 71 selfloop flow, removed 9 redundant places. [2024-11-23 18:31:22,297 INFO L231 Difference]: Finished difference. Result has 94 places, 105 transitions, 688 flow [2024-11-23 18:31:22,298 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} [2024-11-23 18:31:22,298 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2024-11-23 18:31:22,300 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 105 transitions, 688 flow [2024-11-23 18:31:22,300 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) [2024-11-23 18:31:22,300 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:31:22,301 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] [2024-11-23 18:31:22,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-23 18:31:22,301 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:31:22,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:31:22,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1859763725, now seen corresponding path program 3 times [2024-11-23 18:31:22,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:31:22,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768610417] [2024-11-23 18:31:22,302 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:31:22,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:31:22,357 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:31:22,358 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:31:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:31:22,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:31:22,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768610417] [2024-11-23 18:31:22,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768610417] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:31:22,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290084037] [2024-11-23 18:31:22,564 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:31:22,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:31:22,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:31:22,566 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:31:22,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 18:31:22,663 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:31:22,664 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:31:22,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 18:31:22,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:31:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:31:22,992 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:31:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:31:23,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290084037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:31:23,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:31:23,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-11-23 18:31:23,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048114677] [2024-11-23 18:31:23,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:31:23,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 18:31:23,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:31:23,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 18:31:23,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-11-23 18:31:23,510 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-23 18:31:23,510 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) [2024-11-23 18:31:23,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:31:23,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-23 18:31:23,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:31:24,317 INFO L124 PetriNetUnfolderBase]: 648/1345 cut-off events. [2024-11-23 18:31:24,318 INFO L125 PetriNetUnfolderBase]: For 4093/4132 co-relation queries the response was YES. [2024-11-23 18:31:24,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4943 conditions, 1345 events. 648/1345 cut-off events. For 4093/4132 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 7188 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. [2024-11-23 18:31:24,327 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 35 selfloop transitions, 3 changer transitions 87/131 dead transitions. [2024-11-23 18:31:24,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 131 transitions, 1064 flow [2024-11-23 18:31:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 18:31:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 18:31:24,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-11-23 18:31:24,329 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-23 18:31:24,329 INFO L175 Difference]: Start difference. First operand has 94 places, 105 transitions, 688 flow. Second operand 9 states and 144 transitions. [2024-11-23 18:31:24,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 131 transitions, 1064 flow [2024-11-23 18:31:24,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 131 transitions, 1008 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-23 18:31:24,340 INFO L231 Difference]: Finished difference. Result has 95 places, 44 transitions, 242 flow [2024-11-23 18:31:24,341 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} [2024-11-23 18:31:24,341 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2024-11-23 18:31:24,341 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 44 transitions, 242 flow [2024-11-23 18:31:24,342 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) [2024-11-23 18:31:24,342 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:31:24,342 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] [2024-11-23 18:31:24,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-23 18:31:24,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:31:24,545 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:31:24,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:31:24,546 INFO L85 PathProgramCache]: Analyzing trace with hash 237262174, now seen corresponding path program 4 times [2024-11-23 18:31:24,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:31:24,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297393586] [2024-11-23 18:31:24,546 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 18:31:24,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:31:24,575 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 18:31:24,575 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:31:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 18:31:24,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:31:24,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297393586] [2024-11-23 18:31:24,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297393586] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:31:24,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:31:24,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:31:24,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334247062] [2024-11-23 18:31:24,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:31:24,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:31:24,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:31:24,709 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:31:24,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:31:24,724 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-23 18:31:24,725 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) [2024-11-23 18:31:24,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:31:24,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-23 18:31:24,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:31:25,048 INFO L124 PetriNetUnfolderBase]: 627/1239 cut-off events. [2024-11-23 18:31:25,048 INFO L125 PetriNetUnfolderBase]: For 2806/2871 co-relation queries the response was YES. [2024-11-23 18:31:25,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4214 conditions, 1239 events. 627/1239 cut-off events. For 2806/2871 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 5876 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. [2024-11-23 18:31:25,058 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 68 selfloop transitions, 11 changer transitions 1/86 dead transitions. [2024-11-23 18:31:25,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 86 transitions, 615 flow [2024-11-23 18:31:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:31:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:31:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-11-23 18:31:25,059 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6935483870967742 [2024-11-23 18:31:25,059 INFO L175 Difference]: Start difference. First operand has 95 places, 44 transitions, 242 flow. Second operand 4 states and 86 transitions. [2024-11-23 18:31:25,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 86 transitions, 615 flow [2024-11-23 18:31:25,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 86 transitions, 543 flow, removed 30 selfloop flow, removed 17 redundant places. [2024-11-23 18:31:25,067 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 301 flow [2024-11-23 18:31:25,067 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} [2024-11-23 18:31:25,068 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2024-11-23 18:31:25,069 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 301 flow [2024-11-23 18:31:25,069 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) [2024-11-23 18:31:25,069 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:31:25,069 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] [2024-11-23 18:31:25,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-23 18:31:25,071 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:31:25,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:31:25,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1506729840, now seen corresponding path program 5 times [2024-11-23 18:31:25,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:31:25,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479680030] [2024-11-23 18:31:25,074 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 18:31:25,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:31:25,108 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:31:25,108 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:31:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 18:31:25,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:31:25,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479680030] [2024-11-23 18:31:25,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479680030] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:31:25,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28413200] [2024-11-23 18:31:25,291 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 18:31:25,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:31:25,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:31:25,293 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:31:25,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 18:31:25,410 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:31:25,410 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:31:25,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 18:31:25,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:31:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 18:31:25,663 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:31:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 18:31:25,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28413200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:31:25,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:31:25,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-23 18:31:25,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352951953] [2024-11-23 18:31:25,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:31:25,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 18:31:25,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:31:25,821 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 18:31:25,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-11-23 18:31:25,904 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-23 18:31:25,904 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) [2024-11-23 18:31:25,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:31:25,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-23 18:31:25,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:31:26,415 INFO L124 PetriNetUnfolderBase]: 685/1424 cut-off events. [2024-11-23 18:31:26,415 INFO L125 PetriNetUnfolderBase]: For 2351/2460 co-relation queries the response was YES. [2024-11-23 18:31:26,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4412 conditions, 1424 events. 685/1424 cut-off events. For 2351/2460 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 7136 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. [2024-11-23 18:31:26,425 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 54 selfloop transitions, 5 changer transitions 25/90 dead transitions. [2024-11-23 18:31:26,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 688 flow [2024-11-23 18:31:26,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 18:31:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 18:31:26,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-11-23 18:31:26,426 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47580645161290325 [2024-11-23 18:31:26,426 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 301 flow. Second operand 8 states and 118 transitions. [2024-11-23 18:31:26,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 688 flow [2024-11-23 18:31:26,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 678 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-11-23 18:31:26,432 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 325 flow [2024-11-23 18:31:26,433 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} [2024-11-23 18:31:26,433 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-11-23 18:31:26,434 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 325 flow [2024-11-23 18:31:26,434 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) [2024-11-23 18:31:26,434 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:31:26,435 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] [2024-11-23 18:31:26,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 18:31:26,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-23 18:31:26,639 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:31:26,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:31:26,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1089102991, now seen corresponding path program 6 times [2024-11-23 18:31:26,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:31:26,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90597645] [2024-11-23 18:31:26,640 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 18:31:26,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:31:26,699 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-23 18:31:26,699 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:31:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 18:31:29,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:31:29,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90597645] [2024-11-23 18:31:29,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90597645] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:31:29,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292907229] [2024-11-23 18:31:29,846 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 18:31:29,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:31:29,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:31:29,853 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:31:29,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 18:31:29,965 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-23 18:31:29,966 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:31:29,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-23 18:31:29,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:31:32,898 INFO L349 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2024-11-23 18:31:32,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 52 treesize of output 24 [2024-11-23 18:31:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 18:31:33,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:31:38,619 INFO L349 Elim1Store]: treesize reduction 164, result has 86.0 percent of original size [2024-11-23 18:31:38,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 233 treesize of output 1066 [2024-11-23 18:35:46,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-11-23 18:35:46,346 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/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") [2024-11-23 18:35:46,347 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-23 18:35:46,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 18:35:46,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-23 18:35:46,548 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_fe382389-73cf-4949-95c2-d352d5697e31/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:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$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) ... 69 more [2024-11-23 18:35:46,553 INFO L158 Benchmark]: Toolchain (without parser) took 294857.03ms. Allocated memory was 117.4MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 92.5MB in the beginning and 1.0GB in the end (delta: -931.3MB). Peak memory consumption was 880.0MB. Max. memory is 16.1GB. [2024-11-23 18:35:46,553 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 117.4MB. Free memory is still 74.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 18:35:46,554 INFO L158 Benchmark]: CACSL2BoogieTranslator took 344.62ms. Allocated memory is still 117.4MB. Free memory was 92.3MB in the beginning and 80.0MB in the end (delta: 12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-23 18:35:46,554 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.05ms. Allocated memory is still 117.4MB. Free memory was 80.0MB in the beginning and 78.4MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-23 18:35:46,554 INFO L158 Benchmark]: Boogie Preprocessor took 76.18ms. Allocated memory is still 117.4MB. Free memory was 78.2MB in the beginning and 76.2MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 18:35:46,554 INFO L158 Benchmark]: RCFGBuilder took 1089.64ms. Allocated memory is still 117.4MB. Free memory was 76.0MB in the beginning and 78.0MB in the end (delta: -2.0MB). Peak memory consumption was 46.9MB. Max. memory is 16.1GB. [2024-11-23 18:35:46,554 INFO L158 Benchmark]: TraceAbstraction took 293288.82ms. Allocated memory was 117.4MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 77.4MB in the beginning and 1.0GB in the end (delta: -946.3MB). Peak memory consumption was 866.7MB. Max. memory is 16.1GB. [2024-11-23 18:35:46,559 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 117.4MB. Free memory is still 74.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 344.62ms. Allocated memory is still 117.4MB. Free memory was 92.3MB in the beginning and 80.0MB in the end (delta: 12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.05ms. Allocated memory is still 117.4MB. Free memory was 80.0MB in the beginning and 78.4MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 76.18ms. Allocated memory is still 117.4MB. Free memory was 78.2MB in the beginning and 76.2MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 1089.64ms. Allocated memory is still 117.4MB. Free memory was 76.0MB in the beginning and 78.0MB in the end (delta: -2.0MB). Peak memory consumption was 46.9MB. Max. memory is 16.1GB. * TraceAbstraction took 293288.82ms. Allocated memory was 117.4MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 77.4MB in the beginning and 1.0GB in the end (delta: -946.3MB). Peak memory consumption was 866.7MB. 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_fe382389-73cf-4949-95c2-d352d5697e31/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_fe382389-73cf-4949-95c2-d352d5697e31/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_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/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_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/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_fe382389-73cf-4949-95c2-d352d5697e31/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 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 18:35:49,014 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 18:35:49,141 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-23 18:35:49,151 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 18:35:49,151 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 18:35:49,180 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 18:35:49,181 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 18:35:49,181 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 18:35:49,181 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 18:35:49,181 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 18:35:49,182 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 18:35:49,182 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 18:35:49,182 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 18:35:49,182 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 18:35:49,182 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 18:35:49,183 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 18:35:49,183 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 18:35:49,183 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 18:35:49,183 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 18:35:49,183 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 18:35:49,183 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 18:35:49,184 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 18:35:49,184 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 18:35:49,184 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 18:35:49,184 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-23 18:35:49,184 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-23 18:35:49,184 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 18:35:49,184 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 18:35:49,185 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 18:35:49,185 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 18:35:49,185 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 18:35:49,185 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:35:49,185 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:35:49,185 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:35:49,186 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:35:49,186 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 18:35:49,186 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:35:49,186 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:35:49,186 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:35:49,186 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:35:49,186 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 18:35:49,187 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 18:35:49,187 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 18:35:49,187 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 18:35:49,187 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-23 18:35:49,187 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-23 18:35:49,187 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 18:35:49,187 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 18:35:49,188 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 18:35:49,188 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 18:35:49,188 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_fe382389-73cf-4949-95c2-d352d5697e31/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 -> 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b [2024-11-23 18:35:49,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 18:35:49,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 18:35:49,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 18:35:49,546 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 18:35:49,546 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 18:35:49,547 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2024-11-23 18:35:52,584 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/data/a4071fbf5/3b56a0272c1145e1bf13e6fa0b509d62/FLAGf714e588f [2024-11-23 18:35:52,822 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 18:35:52,824 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2024-11-23 18:35:52,835 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/data/a4071fbf5/3b56a0272c1145e1bf13e6fa0b509d62/FLAGf714e588f [2024-11-23 18:35:52,856 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/data/a4071fbf5/3b56a0272c1145e1bf13e6fa0b509d62 [2024-11-23 18:35:52,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 18:35:52,861 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 18:35:52,863 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 18:35:52,863 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 18:35:52,868 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 18:35:52,868 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:35:52" (1/1) ... [2024-11-23 18:35:52,871 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dff7dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:35:52, skipping insertion in model container [2024-11-23 18:35:52,871 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:35:52" (1/1) ... [2024-11-23 18:35:52,892 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 18:35:53,109 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_fe382389-73cf-4949-95c2-d352d5697e31/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2950,2963] [2024-11-23 18:35:53,119 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 18:35:53,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:35:53,138 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 18:35:53,174 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_fe382389-73cf-4949-95c2-d352d5697e31/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2950,2963] [2024-11-23 18:35:53,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:35:53,200 INFO L204 MainTranslator]: Completed translation [2024-11-23 18:35:53,201 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:35:53 WrapperNode [2024-11-23 18:35:53,201 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 18:35:53,203 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 18:35:53,203 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 18:35:53,203 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 18:35:53,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:35:53" (1/1) ... [2024-11-23 18:35:53,223 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:35:53" (1/1) ... [2024-11-23 18:35:53,259 INFO L138 Inliner]: procedures = 25, calls = 35, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 178 [2024-11-23 18:35:53,260 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 18:35:53,260 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 18:35:53,261 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 18:35:53,261 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 18:35:53,270 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:35:53" (1/1) ... [2024-11-23 18:35:53,270 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:35:53" (1/1) ... [2024-11-23 18:35:53,279 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:35:53" (1/1) ... [2024-11-23 18:35:53,306 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]. [2024-11-23 18:35:53,306 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:35:53" (1/1) ... [2024-11-23 18:35:53,306 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:35:53" (1/1) ... [2024-11-23 18:35:53,315 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:35:53" (1/1) ... [2024-11-23 18:35:53,319 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:35:53" (1/1) ... [2024-11-23 18:35:53,322 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:35:53" (1/1) ... [2024-11-23 18:35:53,323 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:35:53" (1/1) ... [2024-11-23 18:35:53,325 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:35:53" (1/1) ... [2024-11-23 18:35:53,327 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 18:35:53,328 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 18:35:53,328 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 18:35:53,328 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 18:35:53,329 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:35:53" (1/1) ... [2024-11-23 18:35:53,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:35:53,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:35:53,361 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 18:35:53,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 18:35:53,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 18:35:53,390 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 18:35:53,390 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 18:35:53,390 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 18:35:53,390 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 18:35:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-23 18:35:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-23 18:35:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 18:35:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 18:35:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 18:35:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-23 18:35:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-23 18:35:53,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 18:35:53,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 18:35:53,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-23 18:35:53,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-23 18:35:53,393 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 18:35:53,502 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 18:35:53,504 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 18:35:53,851 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 18:35:53,851 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 18:35:54,328 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 18:35:54,328 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-23 18:35:54,328 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:35:54 BoogieIcfgContainer [2024-11-23 18:35:54,329 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 18:35:54,332 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 18:35:54,332 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 18:35:54,337 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 18:35:54,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 06:35:52" (1/3) ... [2024-11-23 18:35:54,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@139a2539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:35:54, skipping insertion in model container [2024-11-23 18:35:54,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:35:53" (2/3) ... [2024-11-23 18:35:54,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@139a2539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:35:54, skipping insertion in model container [2024-11-23 18:35:54,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:35:54" (3/3) ... [2024-11-23 18:35:54,341 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2024-11-23 18:35:54,360 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 18:35:54,362 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-dec-subseq.wvr.c that has 3 procedures, 27 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-23 18:35:54,362 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 18:35:54,425 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-23 18:35:54,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 31 transitions, 76 flow [2024-11-23 18:35:54,501 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2024-11-23 18:35:54,503 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-23 18:35:54,506 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. [2024-11-23 18:35:54,507 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 31 transitions, 76 flow [2024-11-23 18:35:54,510 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 28 transitions, 68 flow [2024-11-23 18:35:54,524 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 18:35:54,538 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;@7a53c40c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 18:35:54,540 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-23 18:35:54,560 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 18:35:54,560 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2024-11-23 18:35:54,560 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-23 18:35:54,560 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:35:54,561 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:35:54,561 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:35:54,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:35:54,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1966712201, now seen corresponding path program 1 times [2024-11-23 18:35:54,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:35:54,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044191881] [2024-11-23 18:35:54,582 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:35:54,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:35:54,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:35:54,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:35:54,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 18:35:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:35:54,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-23 18:35:54,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:35:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:35:54,815 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:35:54,816 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:35:54,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044191881] [2024-11-23 18:35:54,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044191881] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:35:54,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:35:54,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:35:54,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239017420] [2024-11-23 18:35:54,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:35:54,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:35:54,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:35:54,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:35:54,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:35:54,857 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-23 18:35:54,860 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) [2024-11-23 18:35:54,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:35:54,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-23 18:35:54,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:35:55,106 INFO L124 PetriNetUnfolderBase]: 175/325 cut-off events. [2024-11-23 18:35:55,106 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-23 18:35:55,109 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. [2024-11-23 18:35:55,113 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 31 selfloop transitions, 2 changer transitions 2/41 dead transitions. [2024-11-23 18:35:55,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 170 flow [2024-11-23 18:35:55,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:35:55,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:35:55,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-11-23 18:35:55,130 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6451612903225806 [2024-11-23 18:35:55,135 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 68 flow. Second operand 3 states and 60 transitions. [2024-11-23 18:35:55,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 170 flow [2024-11-23 18:35:55,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 41 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 18:35:55,145 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 72 flow [2024-11-23 18:35:55,147 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} [2024-11-23 18:35:55,152 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2024-11-23 18:35:55,152 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 72 flow [2024-11-23 18:35:55,153 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) [2024-11-23 18:35:55,153 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:35:55,153 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] [2024-11-23 18:35:55,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-23 18:35:55,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:35:55,357 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:35:55,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:35:55,358 INFO L85 PathProgramCache]: Analyzing trace with hash 2132097818, now seen corresponding path program 1 times [2024-11-23 18:35:55,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:35:55,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719920817] [2024-11-23 18:35:55,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:35:55,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:35:55,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:35:55,363 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:35:55,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 18:35:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:35:55,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 18:35:55,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:35:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:35:55,590 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:35:55,590 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:35:55,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719920817] [2024-11-23 18:35:55,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719920817] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:35:55,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:35:55,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:35:55,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526627861] [2024-11-23 18:35:55,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:35:55,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:35:55,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:35:55,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:35:55,594 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:35:55,614 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-23 18:35:55,615 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) [2024-11-23 18:35:55,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:35:55,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-23 18:35:55,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:35:55,823 INFO L124 PetriNetUnfolderBase]: 257/451 cut-off events. [2024-11-23 18:35:55,824 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-23 18:35:55,827 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. [2024-11-23 18:35:55,830 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-11-23 18:35:55,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 176 flow [2024-11-23 18:35:55,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:35:55,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:35:55,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2024-11-23 18:35:55,833 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2024-11-23 18:35:55,833 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 72 flow. Second operand 5 states and 75 transitions. [2024-11-23 18:35:55,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 176 flow [2024-11-23 18:35:55,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 42 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:35:55,835 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 86 flow [2024-11-23 18:35:55,835 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} [2024-11-23 18:35:55,837 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2024-11-23 18:35:55,838 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 86 flow [2024-11-23 18:35:55,838 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) [2024-11-23 18:35:55,838 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:35:55,839 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] [2024-11-23 18:35:55,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-23 18:35:56,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:35:56,045 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:35:56,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:35:56,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1761241815, now seen corresponding path program 1 times [2024-11-23 18:35:56,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:35:56,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787705525] [2024-11-23 18:35:56,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:35:56,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:35:56,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:35:56,049 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:35:56,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 18:35:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:35:56,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 18:35:56,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:35:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:35:56,221 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:35:56,222 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:35:56,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787705525] [2024-11-23 18:35:56,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787705525] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:35:56,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:35:56,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:35:56,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141939736] [2024-11-23 18:35:56,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:35:56,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:35:56,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:35:56,225 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:35:56,225 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:35:56,235 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-11-23 18:35:56,236 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) [2024-11-23 18:35:56,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:35:56,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-11-23 18:35:56,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:35:56,556 INFO L124 PetriNetUnfolderBase]: 508/869 cut-off events. [2024-11-23 18:35:56,556 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2024-11-23 18:35:56,558 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. [2024-11-23 18:35:56,562 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 45 selfloop transitions, 9 changer transitions 0/58 dead transitions. [2024-11-23 18:35:56,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 58 transitions, 271 flow [2024-11-23 18:35:56,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:35:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:35:56,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-11-23 18:35:56,564 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-23 18:35:56,564 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 86 flow. Second operand 5 states and 80 transitions. [2024-11-23 18:35:56,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 58 transitions, 271 flow [2024-11-23 18:35:56,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 58 transitions, 264 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 18:35:56,566 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 138 flow [2024-11-23 18:35:56,567 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} [2024-11-23 18:35:56,567 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-11-23 18:35:56,568 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 138 flow [2024-11-23 18:35:56,568 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) [2024-11-23 18:35:56,568 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:35:56,568 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] [2024-11-23 18:35:56,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 18:35:56,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:35:56,769 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:35:56,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:35:56,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1054430319, now seen corresponding path program 2 times [2024-11-23 18:35:56,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:35:56,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474365609] [2024-11-23 18:35:56,771 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:35:56,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:35:56,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:35:56,772 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:35:56,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 18:35:56,871 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 18:35:56,871 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:35:56,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 18:35:56,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:35:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:35:56,918 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:35:56,918 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:35:56,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474365609] [2024-11-23 18:35:56,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474365609] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:35:56,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:35:56,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:35:56,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498223806] [2024-11-23 18:35:56,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:35:56,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:35:56,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:35:56,920 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:35:56,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:35:56,929 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-23 18:35:56,929 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) [2024-11-23 18:35:56,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:35:56,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-23 18:35:56,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:35:57,139 INFO L124 PetriNetUnfolderBase]: 447/779 cut-off events. [2024-11-23 18:35:57,139 INFO L125 PetriNetUnfolderBase]: For 552/567 co-relation queries the response was YES. [2024-11-23 18:35:57,141 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. [2024-11-23 18:35:57,147 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 26 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-23 18:35:57,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 196 flow [2024-11-23 18:35:57,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:35:57,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:35:57,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-11-23 18:35:57,151 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-11-23 18:35:57,151 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 138 flow. Second operand 3 states and 48 transitions. [2024-11-23 18:35:57,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 196 flow [2024-11-23 18:35:57,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 196 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-23 18:35:57,158 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 150 flow [2024-11-23 18:35:57,158 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} [2024-11-23 18:35:57,158 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-11-23 18:35:57,159 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 150 flow [2024-11-23 18:35:57,159 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) [2024-11-23 18:35:57,159 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:35:57,159 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] [2024-11-23 18:35:57,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 18:35:57,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:35:57,359 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:35:57,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:35:57,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1906845710, now seen corresponding path program 1 times [2024-11-23 18:35:57,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:35:57,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960036936] [2024-11-23 18:35:57,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:35:57,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:35:57,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:35:57,364 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:35:57,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 18:35:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:35:57,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 18:35:57,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:35:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:35:57,582 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:35:57,582 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:35:57,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960036936] [2024-11-23 18:35:57,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960036936] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:35:57,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:35:57,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:35:57,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076959549] [2024-11-23 18:35:57,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:35:57,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:35:57,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:35:57,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:35:57,584 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:35:57,584 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-23 18:35:57,584 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) [2024-11-23 18:35:57,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:35:57,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-23 18:35:57,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:35:57,833 INFO L124 PetriNetUnfolderBase]: 520/945 cut-off events. [2024-11-23 18:35:57,833 INFO L125 PetriNetUnfolderBase]: For 723/749 co-relation queries the response was YES. [2024-11-23 18:35:57,836 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. [2024-11-23 18:35:57,855 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 27 selfloop transitions, 2 changer transitions 20/58 dead transitions. [2024-11-23 18:35:57,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 58 transitions, 341 flow [2024-11-23 18:35:57,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:35:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:35:57,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-11-23 18:35:57,859 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-11-23 18:35:57,859 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 150 flow. Second operand 4 states and 72 transitions. [2024-11-23 18:35:57,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 58 transitions, 341 flow [2024-11-23 18:35:57,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 58 transitions, 333 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-23 18:35:57,864 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 162 flow [2024-11-23 18:35:57,864 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} [2024-11-23 18:35:57,865 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2024-11-23 18:35:57,866 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 162 flow [2024-11-23 18:35:57,866 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) [2024-11-23 18:35:57,866 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:35:57,867 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] [2024-11-23 18:35:57,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-23 18:35:58,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:35:58,068 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:35:58,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:35:58,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1289220391, now seen corresponding path program 1 times [2024-11-23 18:35:58,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:35:58,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251139614] [2024-11-23 18:35:58,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:35:58,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:35:58,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:35:58,071 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:35:58,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 18:35:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:35:58,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 18:35:58,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:35:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:35:58,434 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:35:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:35:58,731 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:35:58,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251139614] [2024-11-23 18:35:58,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251139614] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:35:58,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:35:58,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-11-23 18:35:58,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323857535] [2024-11-23 18:35:58,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:35:58,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 18:35:58,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:35:58,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 18:35:58,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-11-23 18:35:58,800 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-11-23 18:35:58,801 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) [2024-11-23 18:35:58,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:35:58,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-11-23 18:35:58,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:35:59,146 INFO L124 PetriNetUnfolderBase]: 487/909 cut-off events. [2024-11-23 18:35:59,147 INFO L125 PetriNetUnfolderBase]: For 858/917 co-relation queries the response was YES. [2024-11-23 18:35:59,152 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. [2024-11-23 18:35:59,155 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 53 selfloop transitions, 6 changer transitions 8/76 dead transitions. [2024-11-23 18:35:59,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 76 transitions, 465 flow [2024-11-23 18:35:59,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 18:35:59,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 18:35:59,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-11-23 18:35:59,158 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-11-23 18:35:59,158 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 162 flow. Second operand 6 states and 102 transitions. [2024-11-23 18:35:59,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 76 transitions, 465 flow [2024-11-23 18:35:59,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 76 transitions, 461 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-23 18:35:59,178 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 205 flow [2024-11-23 18:35:59,178 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} [2024-11-23 18:35:59,178 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2024-11-23 18:35:59,178 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 205 flow [2024-11-23 18:35:59,179 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) [2024-11-23 18:35:59,179 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:35:59,179 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] [2024-11-23 18:35:59,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 18:35:59,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:35:59,379 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:35:59,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:35:59,380 INFO L85 PathProgramCache]: Analyzing trace with hash 755596942, now seen corresponding path program 1 times [2024-11-23 18:35:59,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:35:59,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001428973] [2024-11-23 18:35:59,380 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:35:59,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:35:59,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:35:59,384 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:35:59,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 18:35:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:35:59,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-23 18:35:59,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:36:00,472 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-23 18:36:00,474 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-23 18:36:00,493 INFO L349 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2024-11-23 18:36:00,494 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 [2024-11-23 18:36:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:36:00,574 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:36:02,373 INFO L349 Elim1Store]: treesize reduction 23, result has 74.7 percent of original size [2024-11-23 18:36:02,374 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 [2024-11-23 18:36:02,655 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2024-11-23 18:36:02,656 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 [2024-11-23 18:36:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:36:03,243 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:36:03,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001428973] [2024-11-23 18:36:03,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001428973] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:36:03,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:36:03,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2024-11-23 18:36:03,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014846513] [2024-11-23 18:36:03,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:36:03,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-23 18:36:03,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:36:03,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-23 18:36:03,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2024-11-23 18:36:03,456 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-11-23 18:36:03,457 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) [2024-11-23 18:36:03,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:36:03,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-11-23 18:36:03,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:36:08,300 INFO L124 PetriNetUnfolderBase]: 1680/2829 cut-off events. [2024-11-23 18:36:08,301 INFO L125 PetriNetUnfolderBase]: For 2897/2897 co-relation queries the response was YES. [2024-11-23 18:36:08,307 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. [2024-11-23 18:36:08,313 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 68 selfloop transitions, 11 changer transitions 158/240 dead transitions. [2024-11-23 18:36:08,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 240 transitions, 1572 flow [2024-11-23 18:36:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-23 18:36:08,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-23 18:36:08,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 310 transitions. [2024-11-23 18:36:08,316 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43478260869565216 [2024-11-23 18:36:08,316 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 205 flow. Second operand 23 states and 310 transitions. [2024-11-23 18:36:08,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 240 transitions, 1572 flow [2024-11-23 18:36:08,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 240 transitions, 1552 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-23 18:36:08,323 INFO L231 Difference]: Finished difference. Result has 87 places, 46 transitions, 335 flow [2024-11-23 18:36:08,323 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} [2024-11-23 18:36:08,323 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2024-11-23 18:36:08,324 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 46 transitions, 335 flow [2024-11-23 18:36:08,324 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) [2024-11-23 18:36:08,324 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:36:08,324 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] [2024-11-23 18:36:08,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 18:36:08,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:36:08,528 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-23 18:36:08,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:36:08,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1427694583, now seen corresponding path program 2 times [2024-11-23 18:36:08,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:36:08,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149287501] [2024-11-23 18:36:08,530 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:36:08,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:36:08,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:36:08,532 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:36:08,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe382389-73cf-4949-95c2-d352d5697e31/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process