./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB --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 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:57:17,264 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:57:17,392 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 19:57:17,401 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:57:17,405 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:57:17,441 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:57:17,442 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:57:17,442 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:57:17,443 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:57:17,443 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:57:17,444 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:57:17,444 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:57:17,444 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:57:17,445 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:57:17,446 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:57:17,447 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:57:17,447 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 19:57:17,447 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:57:17,447 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 19:57:17,447 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:57:17,447 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:57:17,447 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 19:57:17,448 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:57:17,448 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 19:57:17,448 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:57:17,448 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 19:57:17,448 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:57:17,448 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:57:17,448 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:57:17,448 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:57:17,448 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:57:17,448 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:57:17,448 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:57:17,449 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:57:17,449 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:57:17,449 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:57:17,449 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:57:17,449 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:57:17,449 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:57:17,449 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:57:17,449 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 19:57:17,449 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 19:57:17,449 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 19:57:17,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 19:57:17,450 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:57:17,450 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:57:17,450 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:57:17,450 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:57:17,450 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_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2024-11-27 19:57:17,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:57:17,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:57:17,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:57:17,888 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:57:17,889 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:57:17,891 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-11-27 19:57:21,360 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/data/5f4725daf/2af754cac1b84439ad00740dff05fd35/FLAG726b83d03 [2024-11-27 19:57:21,758 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:57:21,759 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-11-27 19:57:21,771 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/data/5f4725daf/2af754cac1b84439ad00740dff05fd35/FLAG726b83d03 [2024-11-27 19:57:21,793 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/data/5f4725daf/2af754cac1b84439ad00740dff05fd35 [2024-11-27 19:57:21,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:57:21,800 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:57:21,802 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:57:21,802 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:57:21,808 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:57:21,809 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:57:21" (1/1) ... [2024-11-27 19:57:21,810 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@508b877f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:21, skipping insertion in model container [2024-11-27 19:57:21,810 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:57:21" (1/1) ... [2024-11-27 19:57:21,832 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:57:22,075 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_146bca63-ac90-4606-8fc7-dcc105d26edb/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2862,2875] [2024-11-27 19:57:22,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:57:22,110 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:57:22,148 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_146bca63-ac90-4606-8fc7-dcc105d26edb/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2862,2875] [2024-11-27 19:57:22,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:57:22,173 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:57:22,174 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:22 WrapperNode [2024-11-27 19:57:22,174 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:57:22,176 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:57:22,176 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:57:22,176 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:57:22,185 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:22" (1/1) ... [2024-11-27 19:57:22,197 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:22" (1/1) ... [2024-11-27 19:57:22,233 INFO L138 Inliner]: procedures = 25, calls = 42, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 218 [2024-11-27 19:57:22,234 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:57:22,234 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:57:22,235 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:57:22,235 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:57:22,246 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:22" (1/1) ... [2024-11-27 19:57:22,247 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:22" (1/1) ... [2024-11-27 19:57:22,251 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:22" (1/1) ... [2024-11-27 19:57:22,271 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-27 19:57:22,271 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:22" (1/1) ... [2024-11-27 19:57:22,272 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:22" (1/1) ... [2024-11-27 19:57:22,283 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:22" (1/1) ... [2024-11-27 19:57:22,285 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:22" (1/1) ... [2024-11-27 19:57:22,298 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:22" (1/1) ... [2024-11-27 19:57:22,300 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:22" (1/1) ... [2024-11-27 19:57:22,306 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:22" (1/1) ... [2024-11-27 19:57:22,313 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:57:22,314 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:57:22,314 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:57:22,314 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:57:22,316 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:22" (1/1) ... [2024-11-27 19:57:22,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:57:22,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:57:22,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:57:22,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:57:22,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:57:22,413 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 19:57:22,413 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 19:57:22,414 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 19:57:22,414 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 19:57:22,414 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-27 19:57:22,414 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-27 19:57:22,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 19:57:22,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 19:57:22,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 19:57:22,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 19:57:22,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-27 19:57:22,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-27 19:57:22,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 19:57:22,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:57:22,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:57:22,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 19:57:22,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 19:57:22,420 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 19:57:22,600 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:57:22,602 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:57:23,437 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 19:57:23,438 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:57:24,088 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:57:24,089 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-27 19:57:24,089 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:57:24 BoogieIcfgContainer [2024-11-27 19:57:24,089 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:57:24,095 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:57:24,095 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:57:24,101 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:57:24,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:57:21" (1/3) ... [2024-11-27 19:57:24,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca124b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:57:24, skipping insertion in model container [2024-11-27 19:57:24,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:22" (2/3) ... [2024-11-27 19:57:24,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca124b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:57:24, skipping insertion in model container [2024-11-27 19:57:24,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:57:24" (3/3) ... [2024-11-27 19:57:24,104 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2024-11-27 19:57:24,128 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:57:24,129 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-three-array-max.wvr.c that has 4 procedures, 33 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-27 19:57:24,130 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 19:57:24,235 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-27 19:57:24,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 39 transitions, 99 flow [2024-11-27 19:57:24,342 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2024-11-27 19:57:24,347 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 19:57:24,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 36 events. 7/36 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-27 19:57:24,356 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 39 transitions, 99 flow [2024-11-27 19:57:24,361 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 35 transitions, 88 flow [2024-11-27 19:57:24,377 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:57:24,397 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;@4392d31a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:57:24,397 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-27 19:57:24,415 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 19:57:24,415 INFO L124 PetriNetUnfolderBase]: 7/34 cut-off events. [2024-11-27 19:57:24,416 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 19:57:24,416 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:57:24,417 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] [2024-11-27 19:57:24,417 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:57:24,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:24,432 INFO L85 PathProgramCache]: Analyzing trace with hash 975537836, now seen corresponding path program 1 times [2024-11-27 19:57:24,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:57:24,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536123529] [2024-11-27 19:57:24,443 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:57:24,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:57:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:57:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:57:25,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:57:25,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536123529] [2024-11-27 19:57:25,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536123529] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:57:25,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:57:25,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 19:57:25,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985670736] [2024-11-27 19:57:25,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:57:25,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:57:25,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:57:25,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:57:25,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:57:25,310 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-27 19:57:25,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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) [2024-11-27 19:57:25,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:57:25,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-27 19:57:25,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:57:25,683 INFO L124 PetriNetUnfolderBase]: 362/620 cut-off events. [2024-11-27 19:57:25,683 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-11-27 19:57:25,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1171 conditions, 620 events. 362/620 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2537 event pairs, 230 based on Foata normal form. 0/543 useless extension candidates. Maximal degree in co-relation 993. Up to 492 conditions per place. [2024-11-27 19:57:25,694 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 27 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2024-11-27 19:57:25,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 148 flow [2024-11-27 19:57:25,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:57:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 19:57:25,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-11-27 19:57:25,717 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-11-27 19:57:25,720 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 88 flow. Second operand 3 states and 60 transitions. [2024-11-27 19:57:25,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 148 flow [2024-11-27 19:57:25,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 136 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-27 19:57:25,731 INFO L231 Difference]: Finished difference. Result has 35 places, 36 transitions, 88 flow [2024-11-27 19:57:25,735 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=35, PETRI_TRANSITIONS=36} [2024-11-27 19:57:25,742 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2024-11-27 19:57:25,742 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 36 transitions, 88 flow [2024-11-27 19:57:25,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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) [2024-11-27 19:57:25,743 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:57:25,744 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] [2024-11-27 19:57:25,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 19:57:25,744 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:57:25,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:25,746 INFO L85 PathProgramCache]: Analyzing trace with hash -891570204, now seen corresponding path program 1 times [2024-11-27 19:57:25,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:57:25,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505394791] [2024-11-27 19:57:25,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:57:25,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:57:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:57:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:57:26,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:57:26,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505394791] [2024-11-27 19:57:26,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505394791] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:57:26,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:57:26,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:57:26,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912039813] [2024-11-27 19:57:26,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:57:26,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:57:26,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:57:26,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:57:26,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:57:26,109 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-27 19:57:26,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 36 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:57:26,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:57:26,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-27 19:57:26,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:57:26,428 INFO L124 PetriNetUnfolderBase]: 362/622 cut-off events. [2024-11-27 19:57:26,429 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-27 19:57:26,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1141 conditions, 622 events. 362/622 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2535 event pairs, 230 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 1130. Up to 491 conditions per place. [2024-11-27 19:57:26,441 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 25 selfloop transitions, 6 changer transitions 0/38 dead transitions. [2024-11-27 19:57:26,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 154 flow [2024-11-27 19:57:26,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:57:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:57:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-27 19:57:26,448 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-11-27 19:57:26,448 INFO L175 Difference]: Start difference. First operand has 35 places, 36 transitions, 88 flow. Second operand 4 states and 73 transitions. [2024-11-27 19:57:26,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 154 flow [2024-11-27 19:57:26,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 150 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-27 19:57:26,451 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 112 flow [2024-11-27 19:57:26,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2024-11-27 19:57:26,454 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2024-11-27 19:57:26,455 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 112 flow [2024-11-27 19:57:26,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:57:26,455 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:57:26,455 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] [2024-11-27 19:57:26,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 19:57:26,456 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:57:26,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:26,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1405796623, now seen corresponding path program 1 times [2024-11-27 19:57:26,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:57:26,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27442199] [2024-11-27 19:57:26,458 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:57:26,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:57:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:57:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 19:57:26,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:57:26,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27442199] [2024-11-27 19:57:26,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27442199] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:57:26,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:57:26,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:57:26,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657325819] [2024-11-27 19:57:26,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:57:26,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:57:26,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:57:26,842 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:57:26,842 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:57:26,843 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-27 19:57:26,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2024-11-27 19:57:26,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:57:26,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-27 19:57:26,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:57:27,180 INFO L124 PetriNetUnfolderBase]: 525/955 cut-off events. [2024-11-27 19:57:27,180 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-27 19:57:27,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 955 events. 525/955 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4323 event pairs, 172 based on Foata normal form. 1/836 useless extension candidates. Maximal degree in co-relation 1657. Up to 361 conditions per place. [2024-11-27 19:57:27,192 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 40 selfloop transitions, 2 changer transitions 2/51 dead transitions. [2024-11-27 19:57:27,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 229 flow [2024-11-27 19:57:27,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:57:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 19:57:27,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-11-27 19:57:27,196 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-11-27 19:57:27,197 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 112 flow. Second operand 3 states and 72 transitions. [2024-11-27 19:57:27,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 229 flow [2024-11-27 19:57:27,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 19:57:27,201 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 123 flow [2024-11-27 19:57:27,201 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2024-11-27 19:57:27,203 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2024-11-27 19:57:27,203 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 123 flow [2024-11-27 19:57:27,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2024-11-27 19:57:27,204 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:57:27,204 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, 1, 1, 1] [2024-11-27 19:57:27,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 19:57:27,205 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:57:27,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:27,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1322813042, now seen corresponding path program 1 times [2024-11-27 19:57:27,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:57:27,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748214293] [2024-11-27 19:57:27,207 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:57:27,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:57:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:57:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 19:57:27,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:57:27,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748214293] [2024-11-27 19:57:27,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748214293] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:57:27,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589615695] [2024-11-27 19:57:27,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:57:27,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:57:27,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:57:27,646 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:57:27,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:57:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:57:27,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 19:57:27,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:57:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 19:57:28,028 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:57:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 19:57:28,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589615695] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:57:28,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:57:28,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-27 19:57:28,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501268587] [2024-11-27 19:57:28,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:57:28,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 19:57:28,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:57:28,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 19:57:28,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-27 19:57:28,248 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 19:57:28,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 123 flow. Second operand has 12 states, 12 states have (on average 12.0) internal successors, (144), 12 states have internal predecessors, (144), 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) [2024-11-27 19:57:28,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:57:28,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 19:57:28,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:57:28,955 INFO L124 PetriNetUnfolderBase]: 899/1460 cut-off events. [2024-11-27 19:57:28,955 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-11-27 19:57:28,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2862 conditions, 1460 events. 899/1460 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6037 event pairs, 398 based on Foata normal form. 0/1231 useless extension candidates. Maximal degree in co-relation 2092. Up to 681 conditions per place. [2024-11-27 19:57:28,966 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 36 selfloop transitions, 10 changer transitions 37/89 dead transitions. [2024-11-27 19:57:28,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 89 transitions, 430 flow [2024-11-27 19:57:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 19:57:28,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-27 19:57:28,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-11-27 19:57:28,969 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4672364672364672 [2024-11-27 19:57:28,969 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 123 flow. Second operand 9 states and 164 transitions. [2024-11-27 19:57:28,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 89 transitions, 430 flow [2024-11-27 19:57:28,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 89 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 19:57:28,973 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 173 flow [2024-11-27 19:57:28,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=173, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2024-11-27 19:57:28,974 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2024-11-27 19:57:28,974 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 173 flow [2024-11-27 19:57:28,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.0) internal successors, (144), 12 states have internal predecessors, (144), 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) [2024-11-27 19:57:28,975 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:57:28,975 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:57:28,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 19:57:29,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:57:29,176 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:57:29,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:29,177 INFO L85 PathProgramCache]: Analyzing trace with hash -695485923, now seen corresponding path program 2 times [2024-11-27 19:57:29,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:57:29,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052390669] [2024-11-27 19:57:29,177 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:57:29,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:57:29,217 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 19:57:29,218 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:57:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 19:57:29,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:57:29,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052390669] [2024-11-27 19:57:29,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052390669] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:57:29,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:57:29,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 19:57:29,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150900122] [2024-11-27 19:57:29,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:57:29,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 19:57:29,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:57:29,344 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 19:57:29,344 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 19:57:29,363 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 19:57:29,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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) [2024-11-27 19:57:29,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:57:29,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 19:57:29,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:57:29,874 INFO L124 PetriNetUnfolderBase]: 1119/1785 cut-off events. [2024-11-27 19:57:29,875 INFO L125 PetriNetUnfolderBase]: For 342/342 co-relation queries the response was YES. [2024-11-27 19:57:29,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3782 conditions, 1785 events. 1119/1785 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8496 event pairs, 452 based on Foata normal form. 13/1590 useless extension candidates. Maximal degree in co-relation 3747. Up to 886 conditions per place. [2024-11-27 19:57:29,894 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 64 selfloop transitions, 3 changer transitions 14/87 dead transitions. [2024-11-27 19:57:29,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 87 transitions, 459 flow [2024-11-27 19:57:29,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:57:29,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:57:29,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-11-27 19:57:29,901 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6051282051282051 [2024-11-27 19:57:29,901 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 173 flow. Second operand 5 states and 118 transitions. [2024-11-27 19:57:29,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 87 transitions, 459 flow [2024-11-27 19:57:29,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 87 transitions, 433 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-11-27 19:57:29,918 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 177 flow [2024-11-27 19:57:29,918 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-11-27 19:57:29,919 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2024-11-27 19:57:29,921 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 177 flow [2024-11-27 19:57:29,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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) [2024-11-27 19:57:29,921 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:57:29,922 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:57:29,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 19:57:29,922 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:57:29,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:29,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1580892275, now seen corresponding path program 3 times [2024-11-27 19:57:29,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:57:29,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381326212] [2024-11-27 19:57:29,923 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:57:29,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:57:29,978 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 19:57:29,979 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:57:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 19:57:30,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:57:30,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381326212] [2024-11-27 19:57:30,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381326212] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:57:30,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:57:30,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 19:57:30,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048099304] [2024-11-27 19:57:30,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:57:30,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 19:57:30,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:57:30,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 19:57:30,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 19:57:30,146 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 19:57:30,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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) [2024-11-27 19:57:30,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:57:30,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 19:57:30,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:57:30,831 INFO L124 PetriNetUnfolderBase]: 1889/3087 cut-off events. [2024-11-27 19:57:30,831 INFO L125 PetriNetUnfolderBase]: For 1689/1689 co-relation queries the response was YES. [2024-11-27 19:57:30,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7350 conditions, 3087 events. 1889/3087 cut-off events. For 1689/1689 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16738 event pairs, 800 based on Foata normal form. 14/2863 useless extension candidates. Maximal degree in co-relation 7317. Up to 1492 conditions per place. [2024-11-27 19:57:30,855 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 68 selfloop transitions, 3 changer transitions 13/90 dead transitions. [2024-11-27 19:57:30,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 90 transitions, 512 flow [2024-11-27 19:57:30,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:57:30,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:57:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-11-27 19:57:30,857 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5794871794871795 [2024-11-27 19:57:30,858 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 177 flow. Second operand 5 states and 113 transitions. [2024-11-27 19:57:30,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 90 transitions, 512 flow [2024-11-27 19:57:30,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 90 transitions, 490 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-27 19:57:30,881 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 193 flow [2024-11-27 19:57:30,881 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-11-27 19:57:30,883 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2024-11-27 19:57:30,883 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 193 flow [2024-11-27 19:57:30,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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) [2024-11-27 19:57:30,884 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:57:30,884 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:57:30,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 19:57:30,884 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:57:30,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:30,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1704167259, now seen corresponding path program 4 times [2024-11-27 19:57:30,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:57:30,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016236367] [2024-11-27 19:57:30,885 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:57:30,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:57:30,915 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:57:30,915 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:57:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 19:57:30,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:57:30,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016236367] [2024-11-27 19:57:30,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016236367] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:57:30,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:57:30,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 19:57:30,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950103613] [2024-11-27 19:57:30,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:57:30,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 19:57:30,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:57:30,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 19:57:30,977 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 19:57:30,995 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 19:57:30,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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) [2024-11-27 19:57:30,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:57:30,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 19:57:30,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:57:31,965 INFO L124 PetriNetUnfolderBase]: 2519/4061 cut-off events. [2024-11-27 19:57:31,965 INFO L125 PetriNetUnfolderBase]: For 2879/2879 co-relation queries the response was YES. [2024-11-27 19:57:31,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10249 conditions, 4061 events. 2519/4061 cut-off events. For 2879/2879 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 23011 event pairs, 640 based on Foata normal form. 46/3759 useless extension candidates. Maximal degree in co-relation 10214. Up to 1714 conditions per place. [2024-11-27 19:57:31,996 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 98 selfloop transitions, 16 changer transitions 0/120 dead transitions. [2024-11-27 19:57:31,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 120 transitions, 705 flow [2024-11-27 19:57:31,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 19:57:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 19:57:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-11-27 19:57:31,998 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5224358974358975 [2024-11-27 19:57:31,998 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 193 flow. Second operand 8 states and 163 transitions. [2024-11-27 19:57:31,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 120 transitions, 705 flow [2024-11-27 19:57:32,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 120 transitions, 685 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-27 19:57:32,018 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 301 flow [2024-11-27 19:57:32,019 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=301, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-11-27 19:57:32,020 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2024-11-27 19:57:32,021 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 301 flow [2024-11-27 19:57:32,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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) [2024-11-27 19:57:32,021 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:57:32,022 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:57:32,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-27 19:57:32,022 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:57:32,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:32,023 INFO L85 PathProgramCache]: Analyzing trace with hash -2016300841, now seen corresponding path program 5 times [2024-11-27 19:57:32,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:57:32,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336755982] [2024-11-27 19:57:32,023 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:57:32,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:57:32,068 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:57:32,068 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:57:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:57:32,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:57:32,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336755982] [2024-11-27 19:57:32,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336755982] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:57:32,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366238514] [2024-11-27 19:57:32,247 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:57:32,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:57:32,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:57:32,249 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:57:32,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:57:32,451 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:57:32,451 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:57:32,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 19:57:32,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:57:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:57:32,598 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:57:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:57:32,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366238514] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 19:57:32,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:57:32,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-11-27 19:57:32,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036479475] [2024-11-27 19:57:32,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:57:32,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:57:32,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:57:32,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:57:32,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-27 19:57:32,742 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 19:57:32,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 301 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:57:32,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:57:32,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 19:57:32,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:57:33,418 INFO L124 PetriNetUnfolderBase]: 2376/3769 cut-off events. [2024-11-27 19:57:33,419 INFO L125 PetriNetUnfolderBase]: For 6248/6322 co-relation queries the response was YES. [2024-11-27 19:57:33,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10885 conditions, 3769 events. 2376/3769 cut-off events. For 6248/6322 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 20424 event pairs, 555 based on Foata normal form. 122/3654 useless extension candidates. Maximal degree in co-relation 10848. Up to 2005 conditions per place. [2024-11-27 19:57:33,455 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 73 selfloop transitions, 7 changer transitions 0/86 dead transitions. [2024-11-27 19:57:33,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 86 transitions, 617 flow [2024-11-27 19:57:33,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:57:33,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 19:57:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-11-27 19:57:33,458 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4188034188034188 [2024-11-27 19:57:33,458 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 301 flow. Second operand 6 states and 98 transitions. [2024-11-27 19:57:33,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 86 transitions, 617 flow [2024-11-27 19:57:33,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 585 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-27 19:57:33,489 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 302 flow [2024-11-27 19:57:33,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-11-27 19:57:33,490 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-11-27 19:57:33,492 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 302 flow [2024-11-27 19:57:33,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:57:33,493 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:57:33,493 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:57:33,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 19:57:33,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:57:33,694 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:57:33,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:33,694 INFO L85 PathProgramCache]: Analyzing trace with hash 423409504, now seen corresponding path program 1 times [2024-11-27 19:57:33,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:57:33,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870472075] [2024-11-27 19:57:33,695 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:57:33,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:57:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:57:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:57:34,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:57:34,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870472075] [2024-11-27 19:57:34,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870472075] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:57:34,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452629285] [2024-11-27 19:57:34,039 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:57:34,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:57:34,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:57:34,044 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:57:34,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 19:57:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:57:34,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 19:57:34,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:57:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:57:34,354 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:57:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:57:34,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452629285] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 19:57:34,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:57:34,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2024-11-27 19:57:34,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919900794] [2024-11-27 19:57:34,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:57:34,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:57:34,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:57:34,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:57:34,464 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-11-27 19:57:34,484 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-27 19:57:34,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2024-11-27 19:57:34,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:57:34,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-27 19:57:34,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:57:34,912 INFO L124 PetriNetUnfolderBase]: 1260/2174 cut-off events. [2024-11-27 19:57:34,912 INFO L125 PetriNetUnfolderBase]: For 3679/3702 co-relation queries the response was YES. [2024-11-27 19:57:34,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6122 conditions, 2174 events. 1260/2174 cut-off events. For 3679/3702 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11621 event pairs, 466 based on Foata normal form. 172/2203 useless extension candidates. Maximal degree in co-relation 6081. Up to 1217 conditions per place. [2024-11-27 19:57:34,930 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 50 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2024-11-27 19:57:34,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 431 flow [2024-11-27 19:57:34,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:57:34,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 19:57:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-11-27 19:57:34,932 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-11-27 19:57:34,932 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 302 flow. Second operand 6 states and 105 transitions. [2024-11-27 19:57:34,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 431 flow [2024-11-27 19:57:34,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 417 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-27 19:57:34,947 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 271 flow [2024-11-27 19:57:34,947 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2024-11-27 19:57:34,949 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-11-27 19:57:34,949 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 271 flow [2024-11-27 19:57:34,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2024-11-27 19:57:34,950 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:57:34,950 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:57:34,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 19:57:35,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:57:35,154 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:57:35,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:35,155 INFO L85 PathProgramCache]: Analyzing trace with hash -429779358, now seen corresponding path program 1 times [2024-11-27 19:57:35,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:57:35,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211313756] [2024-11-27 19:57:35,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:57:35,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:57:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:57:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-27 19:57:35,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:57:35,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211313756] [2024-11-27 19:57:35,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211313756] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:57:35,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:57:35,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 19:57:35,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189576016] [2024-11-27 19:57:35,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:57:35,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 19:57:35,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:57:35,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 19:57:35,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 19:57:35,653 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2024-11-27 19:57:35,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 271 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2024-11-27 19:57:35,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:57:35,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2024-11-27 19:57:35,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:57:36,333 INFO L124 PetriNetUnfolderBase]: 1761/2654 cut-off events. [2024-11-27 19:57:36,334 INFO L125 PetriNetUnfolderBase]: For 3493/3519 co-relation queries the response was YES. [2024-11-27 19:57:36,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7992 conditions, 2654 events. 1761/2654 cut-off events. For 3493/3519 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 11656 event pairs, 448 based on Foata normal form. 79/2708 useless extension candidates. Maximal degree in co-relation 7951. Up to 1981 conditions per place. [2024-11-27 19:57:36,357 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 84 selfloop transitions, 9 changer transitions 8/106 dead transitions. [2024-11-27 19:57:36,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 106 transitions, 727 flow [2024-11-27 19:57:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:57:36,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 19:57:36,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-11-27 19:57:36,361 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-11-27 19:57:36,361 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 271 flow. Second operand 6 states and 111 transitions. [2024-11-27 19:57:36,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 106 transitions, 727 flow [2024-11-27 19:57:36,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 106 transitions, 681 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-27 19:57:36,378 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 324 flow [2024-11-27 19:57:36,378 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=324, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2024-11-27 19:57:36,379 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2024-11-27 19:57:36,379 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 324 flow [2024-11-27 19:57:36,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2024-11-27 19:57:36,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:57:36,379 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:57:36,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-27 19:57:36,380 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 19:57:36,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:36,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1926347762, now seen corresponding path program 2 times [2024-11-27 19:57:36,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:57:36,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152342992] [2024-11-27 19:57:36,382 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:57:36,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:57:36,553 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:57:36,553 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:57:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:57:40,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:57:40,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152342992] [2024-11-27 19:57:40,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152342992] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:57:40,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703103450] [2024-11-27 19:57:40,466 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:57:40,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:57:40,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:57:40,468 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:57:40,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 19:57:40,642 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:57:40,642 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:57:40,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-27 19:57:40,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:57:42,062 INFO L349 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2024-11-27 19:57:42,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 128 treesize of output 93 [2024-11-27 19:58:04,217 WARN L286 SmtUtils]: Spent 15.21s on a formula simplification that was a NOOP. DAG size: 1084 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-27 19:58:04,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:58:04,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 38 select indices, 38 select index equivalence classes, 1 disjoint index pairs (out of 703 index pairs), introduced 38 new quantified variables, introduced 703 case distinctions, treesize of input 734 treesize of output 3090 [2024-11-27 20:07:17,185 WARN L286 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 972 DAG size of output: 1028 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:07:28,296 WARN L286 SmtUtils]: Spent 7.90s on a formula simplification. DAG size of input: 970 DAG size of output: 1013 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:07:36,653 WARN L286 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 968 DAG size of output: 981 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:07:48,102 WARN L286 SmtUtils]: Spent 10.02s on a formula simplification. DAG size of input: 956 DAG size of output: 1006 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:07:59,773 WARN L286 SmtUtils]: Spent 8.38s on a formula simplification. DAG size of input: 954 DAG size of output: 1001 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:08:19,051 WARN L286 SmtUtils]: Spent 17.60s on a formula simplification. DAG size of input: 923 DAG size of output: 971 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:09:51,864 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-27 20:09:51,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-11-27 20:09:51,865 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-27 20:09:51,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 20:09:52,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-27 20:09:52,066 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_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/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.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:111) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:584) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:195) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:291) 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) ... 59 more [2024-11-27 20:09:52,072 INFO L158 Benchmark]: Toolchain (without parser) took 750272.42ms. Allocated memory was 142.6MB in the beginning and 1.1GB in the end (delta: 947.9MB). Free memory was 105.7MB in the beginning and 617.4MB in the end (delta: -511.7MB). Peak memory consumption was 659.8MB. Max. memory is 16.1GB. [2024-11-27 20:09:52,072 INFO L158 Benchmark]: CDTParser took 0.74ms. Allocated memory is still 167.8MB. Free memory is still 106.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:09:52,073 INFO L158 Benchmark]: CACSL2BoogieTranslator took 373.32ms. Allocated memory is still 142.6MB. Free memory was 105.7MB in the beginning and 92.8MB in the end (delta: 12.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 20:09:52,073 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.09ms. Allocated memory is still 142.6MB. Free memory was 92.8MB in the beginning and 90.8MB in the end (delta: 2.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 20:09:52,073 INFO L158 Benchmark]: Boogie Preprocessor took 78.69ms. Allocated memory is still 142.6MB. Free memory was 90.8MB in the beginning and 88.1MB in the end (delta: 2.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:09:52,074 INFO L158 Benchmark]: RCFGBuilder took 1775.27ms. Allocated memory is still 142.6MB. Free memory was 88.1MB in the beginning and 77.8MB in the end (delta: 10.4MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. [2024-11-27 20:09:52,074 INFO L158 Benchmark]: TraceAbstraction took 747976.40ms. Allocated memory was 142.6MB in the beginning and 1.1GB in the end (delta: 947.9MB). Free memory was 76.7MB in the beginning and 617.4MB in the end (delta: -540.7MB). Peak memory consumption was 628.4MB. Max. memory is 16.1GB. [2024-11-27 20:09:52,076 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.74ms. Allocated memory is still 167.8MB. Free memory is still 106.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 373.32ms. Allocated memory is still 142.6MB. Free memory was 105.7MB in the beginning and 92.8MB in the end (delta: 12.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.09ms. Allocated memory is still 142.6MB. Free memory was 92.8MB in the beginning and 90.8MB in the end (delta: 2.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 78.69ms. Allocated memory is still 142.6MB. Free memory was 90.8MB in the beginning and 88.1MB in the end (delta: 2.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 1775.27ms. Allocated memory is still 142.6MB. Free memory was 88.1MB in the beginning and 77.8MB in the end (delta: 10.4MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. * TraceAbstraction took 747976.40ms. Allocated memory was 142.6MB in the beginning and 1.1GB in the end (delta: 947.9MB). Free memory was 76.7MB in the beginning and 617.4MB in the end (delta: -540.7MB). Peak memory consumption was 628.4MB. 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_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/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_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/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_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB --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 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:09:55,192 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:09:55,340 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-27 20:09:55,353 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:09:55,354 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:09:55,404 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:09:55,406 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:09:55,406 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:09:55,406 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:09:55,407 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:09:55,408 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:09:55,408 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:09:55,409 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:09:55,409 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:09:55,409 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:09:55,409 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:09:55,409 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 20:09:55,409 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:09:55,409 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:09:55,410 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:09:55,410 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 20:09:55,410 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:09:55,411 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 20:09:55,411 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 20:09:55,411 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-27 20:09:55,411 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-27 20:09:55,411 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:09:55,411 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 20:09:55,411 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:09:55,411 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:09:55,412 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:09:55,412 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:09:55,412 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:09:55,413 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:09:55,413 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:09:55,413 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:09:55,413 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:09:55,413 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:09:55,413 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:09:55,414 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:09:55,414 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:09:55,414 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:09:55,414 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 20:09:55,414 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 20:09:55,414 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-27 20:09:55,414 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-27 20:09:55,414 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:09:55,415 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:09:55,415 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:09:55,415 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:09:55,416 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_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2024-11-27 20:09:55,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:09:55,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:09:55,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:09:55,862 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:09:55,862 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:09:55,864 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-11-27 20:09:59,517 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/data/8deb4cfd3/1ef2ea20089e404e955dd36c500fe9b4/FLAG37a5f8249 [2024-11-27 20:09:59,825 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:09:59,826 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-11-27 20:09:59,835 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/data/8deb4cfd3/1ef2ea20089e404e955dd36c500fe9b4/FLAG37a5f8249 [2024-11-27 20:10:00,107 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/data/8deb4cfd3/1ef2ea20089e404e955dd36c500fe9b4 [2024-11-27 20:10:00,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:10:00,113 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:10:00,115 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:10:00,115 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:10:00,121 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:10:00,122 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:10:00" (1/1) ... [2024-11-27 20:10:00,126 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40779cb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:00, skipping insertion in model container [2024-11-27 20:10:00,126 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:10:00" (1/1) ... [2024-11-27 20:10:00,150 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:10:00,426 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_146bca63-ac90-4606-8fc7-dcc105d26edb/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2862,2875] [2024-11-27 20:10:00,442 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-27 20:10:00,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:10:00,475 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:10:00,527 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_146bca63-ac90-4606-8fc7-dcc105d26edb/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2862,2875] [2024-11-27 20:10:00,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:10:00,558 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:10:00,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:00 WrapperNode [2024-11-27 20:10:00,559 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:10:00,560 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:10:00,560 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:10:00,560 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:10:00,573 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:00" (1/1) ... [2024-11-27 20:10:00,590 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:00" (1/1) ... [2024-11-27 20:10:00,639 INFO L138 Inliner]: procedures = 27, calls = 42, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 211 [2024-11-27 20:10:00,639 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:10:00,640 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:10:00,640 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:10:00,640 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:10:00,652 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:00" (1/1) ... [2024-11-27 20:10:00,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:00" (1/1) ... [2024-11-27 20:10:00,664 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:00" (1/1) ... [2024-11-27 20:10:00,695 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-27 20:10:00,696 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:00" (1/1) ... [2024-11-27 20:10:00,696 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:00" (1/1) ... [2024-11-27 20:10:00,709 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:00" (1/1) ... [2024-11-27 20:10:00,710 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:00" (1/1) ... [2024-11-27 20:10:00,716 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:00" (1/1) ... [2024-11-27 20:10:00,718 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:00" (1/1) ... [2024-11-27 20:10:00,720 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:00" (1/1) ... [2024-11-27 20:10:00,724 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:10:00,725 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:10:00,725 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:10:00,725 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:10:00,727 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:00" (1/1) ... [2024-11-27 20:10:00,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:10:00,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:00,770 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:10:00,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:10:00,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:10:00,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-27 20:10:00,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-27 20:10:00,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-27 20:10:00,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-27 20:10:00,800 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 20:10:00,800 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 20:10:00,801 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 20:10:00,801 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 20:10:00,801 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-27 20:10:00,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-27 20:10:00,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-27 20:10:00,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-27 20:10:00,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 20:10:00,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:10:00,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:10:00,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-27 20:10:00,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-27 20:10:00,806 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 20:10:00,978 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:10:00,980 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:10:01,747 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 20:10:01,748 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:10:02,412 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:10:02,412 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-27 20:10:02,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:10:02 BoogieIcfgContainer [2024-11-27 20:10:02,413 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:10:02,415 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:10:02,416 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:10:02,422 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:10:02,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:10:00" (1/3) ... [2024-11-27 20:10:02,423 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b6f4a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:10:02, skipping insertion in model container [2024-11-27 20:10:02,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:10:00" (2/3) ... [2024-11-27 20:10:02,426 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b6f4a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:10:02, skipping insertion in model container [2024-11-27 20:10:02,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:10:02" (3/3) ... [2024-11-27 20:10:02,428 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2024-11-27 20:10:02,450 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:10:02,451 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-three-array-max.wvr.c that has 4 procedures, 33 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-27 20:10:02,452 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 20:10:02,544 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-27 20:10:02,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 39 transitions, 99 flow [2024-11-27 20:10:02,661 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2024-11-27 20:10:02,664 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 20:10:02,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 36 events. 7/36 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-27 20:10:02,671 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 39 transitions, 99 flow [2024-11-27 20:10:02,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 35 transitions, 88 flow [2024-11-27 20:10:02,689 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:10:02,714 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;@abe1fcd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:10:02,717 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-27 20:10:02,745 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:10:02,745 INFO L124 PetriNetUnfolderBase]: 7/34 cut-off events. [2024-11-27 20:10:02,746 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 20:10:02,746 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:02,747 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] [2024-11-27 20:10:02,747 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:02,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:02,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1559889122, now seen corresponding path program 1 times [2024-11-27 20:10:02,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:02,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163915707] [2024-11-27 20:10:02,773 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:10:02,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:02,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:02,777 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:02,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:10:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:03,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:10:03,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:10:03,160 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:10:03,164 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:03,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163915707] [2024-11-27 20:10:03,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163915707] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:03,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:03,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:10:03,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986552430] [2024-11-27 20:10:03,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:03,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:10:03,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:03,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:10:03,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:10:03,235 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-27 20:10:03,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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) [2024-11-27 20:10:03,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:03,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-27 20:10:03,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:03,710 INFO L124 PetriNetUnfolderBase]: 378/600 cut-off events. [2024-11-27 20:10:03,711 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-27 20:10:03,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 600 events. 378/600 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2166 event pairs, 251 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 993. Up to 520 conditions per place. [2024-11-27 20:10:03,728 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 27 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2024-11-27 20:10:03,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 148 flow [2024-11-27 20:10:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:10:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:10:03,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-11-27 20:10:03,758 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-11-27 20:10:03,760 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 88 flow. Second operand 3 states and 60 transitions. [2024-11-27 20:10:03,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 148 flow [2024-11-27 20:10:03,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 136 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-27 20:10:03,775 INFO L231 Difference]: Finished difference. Result has 35 places, 36 transitions, 88 flow [2024-11-27 20:10:03,780 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=35, PETRI_TRANSITIONS=36} [2024-11-27 20:10:03,787 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2024-11-27 20:10:03,788 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 36 transitions, 88 flow [2024-11-27 20:10:03,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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) [2024-11-27 20:10:03,788 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:03,788 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] [2024-11-27 20:10:03,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 20:10:03,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:03,994 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:03,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:03,995 INFO L85 PathProgramCache]: Analyzing trace with hash 129434060, now seen corresponding path program 1 times [2024-11-27 20:10:03,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:03,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575231037] [2024-11-27 20:10:03,995 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:10:03,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:03,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:03,998 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:04,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:10:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:04,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 20:10:04,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:10:04,404 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:10:04,591 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:04,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575231037] [2024-11-27 20:10:04,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575231037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:10:04,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:10:04,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-11-27 20:10:04,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356549554] [2024-11-27 20:10:04,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:10:04,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:10:04,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:04,596 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:10:04,596 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:10:04,647 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-27 20:10:04,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 36 transitions, 88 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 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) [2024-11-27 20:10:04,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:04,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-27 20:10:04,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:05,878 INFO L124 PetriNetUnfolderBase]: 763/1218 cut-off events. [2024-11-27 20:10:05,879 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-27 20:10:05,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2323 conditions, 1218 events. 763/1218 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5247 event pairs, 502 based on Foata normal form. 0/1048 useless extension candidates. Maximal degree in co-relation 2312. Up to 521 conditions per place. [2024-11-27 20:10:05,892 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 48 selfloop transitions, 28 changer transitions 0/83 dead transitions. [2024-11-27 20:10:05,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 83 transitions, 352 flow [2024-11-27 20:10:05,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:10:05,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 20:10:05,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-11-27 20:10:05,897 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-11-27 20:10:05,897 INFO L175 Difference]: Start difference. First operand has 35 places, 36 transitions, 88 flow. Second operand 8 states and 160 transitions. [2024-11-27 20:10:05,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 83 transitions, 352 flow [2024-11-27 20:10:05,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 83 transitions, 348 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-27 20:10:05,901 INFO L231 Difference]: Finished difference. Result has 41 places, 62 transitions, 216 flow [2024-11-27 20:10:05,902 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=216, PETRI_PLACES=41, PETRI_TRANSITIONS=62} [2024-11-27 20:10:05,903 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2024-11-27 20:10:05,903 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 62 transitions, 216 flow [2024-11-27 20:10:05,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 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) [2024-11-27 20:10:05,903 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:05,904 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] [2024-11-27 20:10:05,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 20:10:06,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:06,105 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:06,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:06,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1176905417, now seen corresponding path program 1 times [2024-11-27 20:10:06,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:06,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849176943] [2024-11-27 20:10:06,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:10:06,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:06,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:06,109 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:06,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:10:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:06,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:10:06,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:06,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:10:06,797 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 52 treesize of output 36 [2024-11-27 20:10:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:10:07,414 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:10:07,414 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:07,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849176943] [2024-11-27 20:10:07,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849176943] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:07,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:07,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:10:07,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467730415] [2024-11-27 20:10:07,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:07,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:10:07,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:07,416 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:10:07,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:10:07,417 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-27 20:10:07,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 62 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2024-11-27 20:10:07,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:07,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-27 20:10:07,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:08,219 INFO L124 PetriNetUnfolderBase]: 1259/1986 cut-off events. [2024-11-27 20:10:08,220 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-27 20:10:08,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3821 conditions, 1986 events. 1259/1986 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9618 event pairs, 344 based on Foata normal form. 2/1702 useless extension candidates. Maximal degree in co-relation 1910. Up to 1069 conditions per place. [2024-11-27 20:10:08,237 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 69 selfloop transitions, 3 changer transitions 1/80 dead transitions. [2024-11-27 20:10:08,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 80 transitions, 403 flow [2024-11-27 20:10:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:10:08,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:10:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-27 20:10:08,241 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6581196581196581 [2024-11-27 20:10:08,241 INFO L175 Difference]: Start difference. First operand has 41 places, 62 transitions, 216 flow. Second operand 3 states and 77 transitions. [2024-11-27 20:10:08,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 80 transitions, 403 flow [2024-11-27 20:10:08,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 80 transitions, 385 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-27 20:10:08,245 INFO L231 Difference]: Finished difference. Result has 43 places, 64 transitions, 217 flow [2024-11-27 20:10:08,245 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=43, PETRI_TRANSITIONS=64} [2024-11-27 20:10:08,246 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2024-11-27 20:10:08,246 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 64 transitions, 217 flow [2024-11-27 20:10:08,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2024-11-27 20:10:08,247 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:08,247 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] [2024-11-27 20:10:08,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 20:10:08,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:08,448 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:08,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:08,449 INFO L85 PathProgramCache]: Analyzing trace with hash 768456811, now seen corresponding path program 1 times [2024-11-27 20:10:08,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:08,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712167972] [2024-11-27 20:10:08,450 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:10:08,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:08,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:08,454 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:08,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:10:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:08,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:10:08,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:10:08,877 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:10:08,878 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:08,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712167972] [2024-11-27 20:10:08,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712167972] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:08,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:08,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:10:08,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343562863] [2024-11-27 20:10:08,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:08,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:10:08,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:08,880 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:10:08,880 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:10:08,903 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-27 20:10:08,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 64 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:08,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:08,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-27 20:10:08,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:09,855 INFO L124 PetriNetUnfolderBase]: 1657/2600 cut-off events. [2024-11-27 20:10:09,855 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2024-11-27 20:10:09,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5538 conditions, 2600 events. 1657/2600 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13069 event pairs, 682 based on Foata normal form. 28/2484 useless extension candidates. Maximal degree in co-relation 2715. Up to 1652 conditions per place. [2024-11-27 20:10:09,882 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 84 selfloop transitions, 12 changer transitions 0/103 dead transitions. [2024-11-27 20:10:09,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 103 transitions, 513 flow [2024-11-27 20:10:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:10:09,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:10:09,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-11-27 20:10:09,885 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-11-27 20:10:09,885 INFO L175 Difference]: Start difference. First operand has 43 places, 64 transitions, 217 flow. Second operand 6 states and 124 transitions. [2024-11-27 20:10:09,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 103 transitions, 513 flow [2024-11-27 20:10:09,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 103 transitions, 506 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:10:09,894 INFO L231 Difference]: Finished difference. Result has 49 places, 73 transitions, 284 flow [2024-11-27 20:10:09,894 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=49, PETRI_TRANSITIONS=73} [2024-11-27 20:10:09,895 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2024-11-27 20:10:09,896 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 73 transitions, 284 flow [2024-11-27 20:10:09,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:09,897 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:09,897 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] [2024-11-27 20:10:09,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 20:10:10,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:10,098 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:10,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:10,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1980131239, now seen corresponding path program 2 times [2024-11-27 20:10:10,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:10,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276552709] [2024-11-27 20:10:10,101 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:10:10,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:10,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:10,103 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:10,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:10:10,347 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:10:10,347 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:10,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:10:10,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:10:10,573 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:10:10,668 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:10,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276552709] [2024-11-27 20:10:10,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276552709] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:10,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:10:10,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-27 20:10:10,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457236217] [2024-11-27 20:10:10,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:10,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:10:10,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:10,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:10:10,670 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:10:10,688 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 20:10:10,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 73 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2024-11-27 20:10:10,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:10,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 20:10:10,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:11,848 INFO L124 PetriNetUnfolderBase]: 2447/3776 cut-off events. [2024-11-27 20:10:11,848 INFO L125 PetriNetUnfolderBase]: For 2018/2154 co-relation queries the response was YES. [2024-11-27 20:10:11,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9813 conditions, 3776 events. 2447/3776 cut-off events. For 2018/2154 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19786 event pairs, 362 based on Foata normal form. 86/3696 useless extension candidates. Maximal degree in co-relation 5938. Up to 781 conditions per place. [2024-11-27 20:10:11,881 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 111 selfloop transitions, 23 changer transitions 0/140 dead transitions. [2024-11-27 20:10:11,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 140 transitions, 761 flow [2024-11-27 20:10:11,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:10:11,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 20:10:11,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-11-27 20:10:11,886 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-27 20:10:11,887 INFO L175 Difference]: Start difference. First operand has 49 places, 73 transitions, 284 flow. Second operand 7 states and 156 transitions. [2024-11-27 20:10:11,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 140 transitions, 761 flow [2024-11-27 20:10:11,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 140 transitions, 744 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-27 20:10:11,907 INFO L231 Difference]: Finished difference. Result has 56 places, 86 transitions, 394 flow [2024-11-27 20:10:11,908 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=394, PETRI_PLACES=56, PETRI_TRANSITIONS=86} [2024-11-27 20:10:11,910 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2024-11-27 20:10:11,912 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 86 transitions, 394 flow [2024-11-27 20:10:11,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2024-11-27 20:10:11,913 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:11,913 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] [2024-11-27 20:10:11,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 20:10:12,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:12,117 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:12,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:12,118 INFO L85 PathProgramCache]: Analyzing trace with hash -802042015, now seen corresponding path program 3 times [2024-11-27 20:10:12,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:12,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797186729] [2024-11-27 20:10:12,119 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:10:12,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:12,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:12,121 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:12,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:10:12,309 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:10:12,309 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:12,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:10:12,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:10:12,524 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:10:12,524 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:12,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797186729] [2024-11-27 20:10:12,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797186729] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:12,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:12,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:10:12,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734981559] [2024-11-27 20:10:12,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:12,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:10:12,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:12,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:10:12,525 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:10:12,546 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-27 20:10:12,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 86 transitions, 394 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:12,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:12,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-27 20:10:12,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:14,074 INFO L124 PetriNetUnfolderBase]: 3731/6006 cut-off events. [2024-11-27 20:10:14,075 INFO L125 PetriNetUnfolderBase]: For 7878/7972 co-relation queries the response was YES. [2024-11-27 20:10:14,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17019 conditions, 6006 events. 3731/6006 cut-off events. For 7878/7972 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 36229 event pairs, 1066 based on Foata normal form. 30/5710 useless extension candidates. Maximal degree in co-relation 9206. Up to 2608 conditions per place. [2024-11-27 20:10:14,139 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 115 selfloop transitions, 12 changer transitions 0/137 dead transitions. [2024-11-27 20:10:14,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 137 transitions, 872 flow [2024-11-27 20:10:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:10:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:10:14,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-11-27 20:10:14,142 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5341880341880342 [2024-11-27 20:10:14,142 INFO L175 Difference]: Start difference. First operand has 56 places, 86 transitions, 394 flow. Second operand 6 states and 125 transitions. [2024-11-27 20:10:14,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 137 transitions, 872 flow [2024-11-27 20:10:14,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 137 transitions, 862 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-11-27 20:10:14,198 INFO L231 Difference]: Finished difference. Result has 64 places, 92 transitions, 479 flow [2024-11-27 20:10:14,199 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=479, PETRI_PLACES=64, PETRI_TRANSITIONS=92} [2024-11-27 20:10:14,199 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-11-27 20:10:14,202 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 92 transitions, 479 flow [2024-11-27 20:10:14,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:14,202 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:14,202 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] [2024-11-27 20:10:14,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 20:10:14,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:14,406 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:14,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:14,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1786981597, now seen corresponding path program 4 times [2024-11-27 20:10:14,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:14,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634570890] [2024-11-27 20:10:14,407 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:10:14,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:14,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:14,410 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:14,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:10:14,527 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:10:14,527 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:14,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:10:14,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:10:14,605 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:10:14,605 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:14,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634570890] [2024-11-27 20:10:14,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634570890] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:14,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:14,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:10:14,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431131121] [2024-11-27 20:10:14,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:14,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:10:14,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:14,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:10:14,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:10:14,633 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-27 20:10:14,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 92 transitions, 479 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:14,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:14,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-27 20:10:14,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:15,980 INFO L124 PetriNetUnfolderBase]: 4203/6774 cut-off events. [2024-11-27 20:10:15,980 INFO L125 PetriNetUnfolderBase]: For 13556/13594 co-relation queries the response was YES. [2024-11-27 20:10:16,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20868 conditions, 6774 events. 4203/6774 cut-off events. For 13556/13594 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 41857 event pairs, 1480 based on Foata normal form. 52/6464 useless extension candidates. Maximal degree in co-relation 12435. Up to 4189 conditions per place. [2024-11-27 20:10:16,050 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 87 selfloop transitions, 33 changer transitions 16/146 dead transitions. [2024-11-27 20:10:16,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 146 transitions, 1103 flow [2024-11-27 20:10:16,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:10:16,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:10:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-11-27 20:10:16,053 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-11-27 20:10:16,053 INFO L175 Difference]: Start difference. First operand has 64 places, 92 transitions, 479 flow. Second operand 5 states and 110 transitions. [2024-11-27 20:10:16,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 146 transitions, 1103 flow [2024-11-27 20:10:16,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 146 transitions, 1074 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-27 20:10:16,113 INFO L231 Difference]: Finished difference. Result has 68 places, 108 transitions, 692 flow [2024-11-27 20:10:16,113 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=692, PETRI_PLACES=68, PETRI_TRANSITIONS=108} [2024-11-27 20:10:16,115 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2024-11-27 20:10:16,115 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 108 transitions, 692 flow [2024-11-27 20:10:16,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:16,116 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:16,116 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] [2024-11-27 20:10:16,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 20:10:16,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:16,317 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:16,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:16,318 INFO L85 PathProgramCache]: Analyzing trace with hash -288638567, now seen corresponding path program 5 times [2024-11-27 20:10:16,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:16,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876692878] [2024-11-27 20:10:16,318 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:10:16,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:16,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:16,321 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:16,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:10:16,486 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:10:16,486 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:16,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:10:16,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:10:16,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:10:16,756 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:16,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876692878] [2024-11-27 20:10:16,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876692878] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:16,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:10:16,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-27 20:10:16,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471315451] [2024-11-27 20:10:16,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:16,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:10:16,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:16,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:10:16,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:10:16,772 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 20:10:16,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 108 transitions, 692 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2024-11-27 20:10:16,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:16,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 20:10:16,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:18,043 INFO L124 PetriNetUnfolderBase]: 4513/6790 cut-off events. [2024-11-27 20:10:18,043 INFO L125 PetriNetUnfolderBase]: For 17616/17704 co-relation queries the response was YES. [2024-11-27 20:10:18,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24955 conditions, 6790 events. 4513/6790 cut-off events. For 17616/17704 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 38493 event pairs, 862 based on Foata normal form. 62/6532 useless extension candidates. Maximal degree in co-relation 17428. Up to 2954 conditions per place. [2024-11-27 20:10:18,113 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 128 selfloop transitions, 28 changer transitions 0/162 dead transitions. [2024-11-27 20:10:18,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 162 transitions, 1285 flow [2024-11-27 20:10:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:10:18,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:10:18,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-11-27 20:10:18,116 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-27 20:10:18,116 INFO L175 Difference]: Start difference. First operand has 68 places, 108 transitions, 692 flow. Second operand 5 states and 117 transitions. [2024-11-27 20:10:18,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 162 transitions, 1285 flow [2024-11-27 20:10:18,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 162 transitions, 1247 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:10:18,277 INFO L231 Difference]: Finished difference. Result has 73 places, 120 transitions, 883 flow [2024-11-27 20:10:18,278 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=883, PETRI_PLACES=73, PETRI_TRANSITIONS=120} [2024-11-27 20:10:18,279 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2024-11-27 20:10:18,280 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 120 transitions, 883 flow [2024-11-27 20:10:18,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2024-11-27 20:10:18,281 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:18,281 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] [2024-11-27 20:10:18,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 20:10:18,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:18,485 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:18,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:18,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1583686711, now seen corresponding path program 6 times [2024-11-27 20:10:18,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:18,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776365494] [2024-11-27 20:10:18,487 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:10:18,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:18,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:18,489 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:18,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 20:10:18,666 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 20:10:18,666 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:18,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:10:18,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:10:18,888 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:10:18,888 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:18,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776365494] [2024-11-27 20:10:18,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776365494] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:18,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:18,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:10:18,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745283807] [2024-11-27 20:10:18,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:18,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:10:18,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:18,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:10:18,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:10:18,923 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-27 20:10:18,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 120 transitions, 883 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:18,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:18,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-27 20:10:18,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:20,184 INFO L124 PetriNetUnfolderBase]: 5355/8916 cut-off events. [2024-11-27 20:10:20,184 INFO L125 PetriNetUnfolderBase]: For 28668/28818 co-relation queries the response was YES. [2024-11-27 20:10:20,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31240 conditions, 8916 events. 5355/8916 cut-off events. For 28668/28818 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 61672 event pairs, 1472 based on Foata normal form. 124/8428 useless extension candidates. Maximal degree in co-relation 20816. Up to 4092 conditions per place. [2024-11-27 20:10:20,344 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 135 selfloop transitions, 28 changer transitions 15/193 dead transitions. [2024-11-27 20:10:20,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 193 transitions, 1907 flow [2024-11-27 20:10:20,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:10:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:10:20,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-11-27 20:10:20,348 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-11-27 20:10:20,349 INFO L175 Difference]: Start difference. First operand has 73 places, 120 transitions, 883 flow. Second operand 6 states and 120 transitions. [2024-11-27 20:10:20,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 193 transitions, 1907 flow [2024-11-27 20:10:20,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 193 transitions, 1887 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-11-27 20:10:20,448 INFO L231 Difference]: Finished difference. Result has 81 places, 144 transitions, 1306 flow [2024-11-27 20:10:20,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1306, PETRI_PLACES=81, PETRI_TRANSITIONS=144} [2024-11-27 20:10:20,450 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 43 predicate places. [2024-11-27 20:10:20,452 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 144 transitions, 1306 flow [2024-11-27 20:10:20,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:20,453 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:20,453 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] [2024-11-27 20:10:20,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 20:10:20,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:20,654 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:20,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:20,655 INFO L85 PathProgramCache]: Analyzing trace with hash -673986951, now seen corresponding path program 7 times [2024-11-27 20:10:20,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:20,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748621697] [2024-11-27 20:10:20,655 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:10:20,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:20,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:20,659 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:20,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 20:10:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:20,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:10:20,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:10:21,007 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:10:21,115 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:21,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748621697] [2024-11-27 20:10:21,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748621697] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:21,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:10:21,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-27 20:10:21,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299128774] [2024-11-27 20:10:21,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:21,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:10:21,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:21,116 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:10:21,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:10:21,133 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 20:10:21,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 144 transitions, 1306 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2024-11-27 20:10:21,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:21,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 20:10:21,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:22,594 INFO L124 PetriNetUnfolderBase]: 5617/8776 cut-off events. [2024-11-27 20:10:22,594 INFO L125 PetriNetUnfolderBase]: For 38694/38744 co-relation queries the response was YES. [2024-11-27 20:10:22,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36209 conditions, 8776 events. 5617/8776 cut-off events. For 38694/38744 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 53872 event pairs, 880 based on Foata normal form. 78/8410 useless extension candidates. Maximal degree in co-relation 31645. Up to 2327 conditions per place. [2024-11-27 20:10:22,687 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 137 selfloop transitions, 61 changer transitions 3/207 dead transitions. [2024-11-27 20:10:22,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 207 transitions, 2070 flow [2024-11-27 20:10:22,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:10:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:10:22,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-11-27 20:10:22,690 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-11-27 20:10:22,690 INFO L175 Difference]: Start difference. First operand has 81 places, 144 transitions, 1306 flow. Second operand 6 states and 130 transitions. [2024-11-27 20:10:22,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 207 transitions, 2070 flow [2024-11-27 20:10:22,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 207 transitions, 2057 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-27 20:10:22,874 INFO L231 Difference]: Finished difference. Result has 90 places, 153 transitions, 1631 flow [2024-11-27 20:10:22,875 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1301, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1631, PETRI_PLACES=90, PETRI_TRANSITIONS=153} [2024-11-27 20:10:22,876 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2024-11-27 20:10:22,876 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 153 transitions, 1631 flow [2024-11-27 20:10:22,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2024-11-27 20:10:22,877 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:22,877 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] [2024-11-27 20:10:22,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 20:10:23,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:23,078 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:23,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:23,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1381151881, now seen corresponding path program 8 times [2024-11-27 20:10:23,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:23,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314592561] [2024-11-27 20:10:23,079 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:10:23,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:23,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:23,084 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:23,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 20:10:23,275 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:10:23,275 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:23,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:10:23,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:10:23,479 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:10:23,479 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:23,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314592561] [2024-11-27 20:10:23,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314592561] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:23,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:23,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:10:23,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309807323] [2024-11-27 20:10:23,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:23,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:10:23,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:23,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:10:23,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:10:23,501 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-11-27 20:10:23,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 153 transitions, 1631 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:23,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:23,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-11-27 20:10:23,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:24,818 INFO L124 PetriNetUnfolderBase]: 4951/8002 cut-off events. [2024-11-27 20:10:24,818 INFO L125 PetriNetUnfolderBase]: For 53088/53170 co-relation queries the response was YES. [2024-11-27 20:10:24,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36729 conditions, 8002 events. 4951/8002 cut-off events. For 53088/53170 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 50802 event pairs, 1394 based on Foata normal form. 68/7590 useless extension candidates. Maximal degree in co-relation 33241. Up to 3948 conditions per place. [2024-11-27 20:10:24,876 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 149 selfloop transitions, 38 changer transitions 0/206 dead transitions. [2024-11-27 20:10:24,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 206 transitions, 2434 flow [2024-11-27 20:10:24,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:10:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:10:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-11-27 20:10:24,878 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-11-27 20:10:24,878 INFO L175 Difference]: Start difference. First operand has 90 places, 153 transitions, 1631 flow. Second operand 6 states and 123 transitions. [2024-11-27 20:10:24,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 206 transitions, 2434 flow [2024-11-27 20:10:25,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 206 transitions, 2402 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-11-27 20:10:25,054 INFO L231 Difference]: Finished difference. Result has 95 places, 168 transitions, 1987 flow [2024-11-27 20:10:25,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1987, PETRI_PLACES=95, PETRI_TRANSITIONS=168} [2024-11-27 20:10:25,055 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 57 predicate places. [2024-11-27 20:10:25,055 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 168 transitions, 1987 flow [2024-11-27 20:10:25,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:25,055 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:25,055 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, 1] [2024-11-27 20:10:25,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-27 20:10:25,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:25,256 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:25,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:25,257 INFO L85 PathProgramCache]: Analyzing trace with hash -940073336, now seen corresponding path program 1 times [2024-11-27 20:10:25,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:25,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110461624] [2024-11-27 20:10:25,257 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:10:25,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:25,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:25,259 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:25,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 20:10:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:25,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:10:25,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:25,586 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:25,672 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:25,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110461624] [2024-11-27 20:10:25,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110461624] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:25,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:10:25,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-27 20:10:25,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377314494] [2024-11-27 20:10:25,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:25,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:10:25,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:25,673 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:10:25,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:10:25,692 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-11-27 20:10:25,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 168 transitions, 1987 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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) [2024-11-27 20:10:25,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:25,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-11-27 20:10:25,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:27,393 INFO L124 PetriNetUnfolderBase]: 7669/12840 cut-off events. [2024-11-27 20:10:27,393 INFO L125 PetriNetUnfolderBase]: For 88126/88126 co-relation queries the response was YES. [2024-11-27 20:10:27,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56572 conditions, 12840 events. 7669/12840 cut-off events. For 88126/88126 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 89582 event pairs, 364 based on Foata normal form. 468/12678 useless extension candidates. Maximal degree in co-relation 51394. Up to 3644 conditions per place. [2024-11-27 20:10:27,484 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 276 selfloop transitions, 49 changer transitions 0/330 dead transitions. [2024-11-27 20:10:27,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 330 transitions, 4666 flow [2024-11-27 20:10:27,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:10:27,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 20:10:27,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-11-27 20:10:27,487 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5311355311355311 [2024-11-27 20:10:27,487 INFO L175 Difference]: Start difference. First operand has 95 places, 168 transitions, 1987 flow. Second operand 7 states and 145 transitions. [2024-11-27 20:10:27,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 330 transitions, 4666 flow [2024-11-27 20:10:27,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 330 transitions, 4536 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-11-27 20:10:27,829 INFO L231 Difference]: Finished difference. Result has 103 places, 197 transitions, 2409 flow [2024-11-27 20:10:27,830 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2409, PETRI_PLACES=103, PETRI_TRANSITIONS=197} [2024-11-27 20:10:27,830 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2024-11-27 20:10:27,830 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 197 transitions, 2409 flow [2024-11-27 20:10:27,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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) [2024-11-27 20:10:27,831 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:27,831 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, 1] [2024-11-27 20:10:27,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 20:10:28,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:28,032 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:28,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:28,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1826631798, now seen corresponding path program 2 times [2024-11-27 20:10:28,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:28,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210515552] [2024-11-27 20:10:28,032 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:10:28,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:28,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:28,035 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:28,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 20:10:28,190 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:10:28,190 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:28,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:10:28,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:28,378 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:10:28,378 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:28,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210515552] [2024-11-27 20:10:28,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210515552] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:28,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:28,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:10:28,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104896022] [2024-11-27 20:10:28,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:28,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:10:28,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:28,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:10:28,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:10:28,401 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 20:10:28,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 197 transitions, 2409 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:28,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:28,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 20:10:28,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:30,383 INFO L124 PetriNetUnfolderBase]: 6467/10740 cut-off events. [2024-11-27 20:10:30,384 INFO L125 PetriNetUnfolderBase]: For 92626/92850 co-relation queries the response was YES. [2024-11-27 20:10:30,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55427 conditions, 10740 events. 6467/10740 cut-off events. For 92626/92850 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 74699 event pairs, 1482 based on Foata normal form. 108/10190 useless extension candidates. Maximal degree in co-relation 44167. Up to 4816 conditions per place. [2024-11-27 20:10:30,486 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 270 selfloop transitions, 15 changer transitions 29/323 dead transitions. [2024-11-27 20:10:30,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 323 transitions, 4820 flow [2024-11-27 20:10:30,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:10:30,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:10:30,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-11-27 20:10:30,488 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-27 20:10:30,488 INFO L175 Difference]: Start difference. First operand has 103 places, 197 transitions, 2409 flow. Second operand 6 states and 117 transitions. [2024-11-27 20:10:30,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 323 transitions, 4820 flow [2024-11-27 20:10:30,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 323 transitions, 4820 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-27 20:10:30,971 INFO L231 Difference]: Finished difference. Result has 111 places, 198 transitions, 2500 flow [2024-11-27 20:10:30,971 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2500, PETRI_PLACES=111, PETRI_TRANSITIONS=198} [2024-11-27 20:10:30,972 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 73 predicate places. [2024-11-27 20:10:30,972 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 198 transitions, 2500 flow [2024-11-27 20:10:30,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:30,972 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:30,972 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, 1] [2024-11-27 20:10:30,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-27 20:10:31,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:31,173 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:31,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:31,174 INFO L85 PathProgramCache]: Analyzing trace with hash 193523562, now seen corresponding path program 3 times [2024-11-27 20:10:31,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:31,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26345898] [2024-11-27 20:10:31,175 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:10:31,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:31,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:31,181 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:31,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 20:10:31,331 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:10:31,331 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:31,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:10:31,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:31,578 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:31,663 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:31,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26345898] [2024-11-27 20:10:31,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26345898] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:31,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:10:31,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-27 20:10:31,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033856059] [2024-11-27 20:10:31,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:31,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:10:31,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:31,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:10:31,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:10:31,682 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-11-27 20:10:31,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 198 transitions, 2500 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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) [2024-11-27 20:10:31,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:31,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-11-27 20:10:31,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:34,245 INFO L124 PetriNetUnfolderBase]: 8551/14362 cut-off events. [2024-11-27 20:10:34,245 INFO L125 PetriNetUnfolderBase]: For 138944/139024 co-relation queries the response was YES. [2024-11-27 20:10:34,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73880 conditions, 14362 events. 8551/14362 cut-off events. For 138944/139024 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 101570 event pairs, 1184 based on Foata normal form. 188/13916 useless extension candidates. Maximal degree in co-relation 59448. Up to 3390 conditions per place. [2024-11-27 20:10:34,347 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 274 selfloop transitions, 68 changer transitions 0/347 dead transitions. [2024-11-27 20:10:34,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 347 transitions, 5202 flow [2024-11-27 20:10:34,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:10:34,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:10:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-11-27 20:10:34,349 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5598290598290598 [2024-11-27 20:10:34,349 INFO L175 Difference]: Start difference. First operand has 111 places, 198 transitions, 2500 flow. Second operand 6 states and 131 transitions. [2024-11-27 20:10:34,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 347 transitions, 5202 flow [2024-11-27 20:10:34,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 347 transitions, 5132 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-11-27 20:10:34,758 INFO L231 Difference]: Finished difference. Result has 117 places, 233 transitions, 3255 flow [2024-11-27 20:10:34,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3255, PETRI_PLACES=117, PETRI_TRANSITIONS=233} [2024-11-27 20:10:34,759 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 79 predicate places. [2024-11-27 20:10:34,759 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 233 transitions, 3255 flow [2024-11-27 20:10:34,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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) [2024-11-27 20:10:34,760 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:34,760 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, 1] [2024-11-27 20:10:34,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 20:10:34,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:34,961 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:34,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:34,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1434674718, now seen corresponding path program 4 times [2024-11-27 20:10:34,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:34,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894471568] [2024-11-27 20:10:34,962 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:10:34,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:34,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:34,967 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:34,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 20:10:35,086 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:10:35,086 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:35,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:10:35,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:35,177 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:35,238 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:35,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894471568] [2024-11-27 20:10:35,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894471568] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:10:35,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:10:35,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2024-11-27 20:10:35,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269367501] [2024-11-27 20:10:35,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:10:35,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:10:35,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:35,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:10:35,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:10:35,269 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 20:10:35,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 233 transitions, 3255 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 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) [2024-11-27 20:10:35,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:35,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 20:10:35,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:38,810 INFO L124 PetriNetUnfolderBase]: 8917/15132 cut-off events. [2024-11-27 20:10:38,810 INFO L125 PetriNetUnfolderBase]: For 164480/164686 co-relation queries the response was YES. [2024-11-27 20:10:38,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82324 conditions, 15132 events. 8917/15132 cut-off events. For 164480/164686 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 112466 event pairs, 606 based on Foata normal form. 224/14674 useless extension candidates. Maximal degree in co-relation 63963. Up to 3009 conditions per place. [2024-11-27 20:10:38,950 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 203 selfloop transitions, 221 changer transitions 0/460 dead transitions. [2024-11-27 20:10:38,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 460 transitions, 6852 flow [2024-11-27 20:10:38,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 20:10:38,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-27 20:10:38,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-11-27 20:10:38,953 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-11-27 20:10:38,953 INFO L175 Difference]: Start difference. First operand has 117 places, 233 transitions, 3255 flow. Second operand 11 states and 231 transitions. [2024-11-27 20:10:38,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 460 transitions, 6852 flow [2024-11-27 20:10:39,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 460 transitions, 6816 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-11-27 20:10:39,567 INFO L231 Difference]: Finished difference. Result has 129 places, 370 transitions, 5727 flow [2024-11-27 20:10:39,567 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3249, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5727, PETRI_PLACES=129, PETRI_TRANSITIONS=370} [2024-11-27 20:10:39,568 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 91 predicate places. [2024-11-27 20:10:39,568 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 370 transitions, 5727 flow [2024-11-27 20:10:39,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 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) [2024-11-27 20:10:39,569 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:39,569 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, 1] [2024-11-27 20:10:39,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-27 20:10:39,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:39,769 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:39,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:39,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1711112976, now seen corresponding path program 5 times [2024-11-27 20:10:39,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:39,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072998241] [2024-11-27 20:10:39,770 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:10:39,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:39,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:39,772 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:39,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 20:10:39,941 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:10:39,941 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:39,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:10:39,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:40,133 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:40,212 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:40,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072998241] [2024-11-27 20:10:40,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072998241] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:40,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:10:40,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-27 20:10:40,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677616204] [2024-11-27 20:10:40,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:40,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:10:40,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:40,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:10:40,213 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:10:40,233 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-11-27 20:10:40,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 370 transitions, 5727 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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) [2024-11-27 20:10:40,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:40,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-11-27 20:10:40,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:43,306 INFO L124 PetriNetUnfolderBase]: 9581/15800 cut-off events. [2024-11-27 20:10:43,306 INFO L125 PetriNetUnfolderBase]: For 206020/206300 co-relation queries the response was YES. [2024-11-27 20:10:43,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92843 conditions, 15800 events. 9581/15800 cut-off events. For 206020/206300 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 111658 event pairs, 1212 based on Foata normal form. 160/15204 useless extension candidates. Maximal degree in co-relation 77507. Up to 7126 conditions per place. [2024-11-27 20:10:43,468 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 350 selfloop transitions, 128 changer transitions 0/483 dead transitions. [2024-11-27 20:10:43,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 483 transitions, 8239 flow [2024-11-27 20:10:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:10:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:10:43,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-11-27 20:10:43,470 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.558974358974359 [2024-11-27 20:10:43,470 INFO L175 Difference]: Start difference. First operand has 129 places, 370 transitions, 5727 flow. Second operand 5 states and 109 transitions. [2024-11-27 20:10:43,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 483 transitions, 8239 flow [2024-11-27 20:10:44,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 483 transitions, 8037 flow, removed 45 selfloop flow, removed 1 redundant places. [2024-11-27 20:10:44,365 INFO L231 Difference]: Finished difference. Result has 136 places, 402 transitions, 6612 flow [2024-11-27 20:10:44,366 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5537, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6612, PETRI_PLACES=136, PETRI_TRANSITIONS=402} [2024-11-27 20:10:44,366 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 98 predicate places. [2024-11-27 20:10:44,366 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 402 transitions, 6612 flow [2024-11-27 20:10:44,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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) [2024-11-27 20:10:44,367 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:44,367 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, 1] [2024-11-27 20:10:44,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-27 20:10:44,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:44,567 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:44,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:44,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1574497558, now seen corresponding path program 6 times [2024-11-27 20:10:44,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:44,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727669479] [2024-11-27 20:10:44,568 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:10:44,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:44,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:44,570 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:44,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 20:10:44,726 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-27 20:10:44,726 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:44,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:10:44,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:44,907 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:45,004 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:45,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727669479] [2024-11-27 20:10:45,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727669479] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:45,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:10:45,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-27 20:10:45,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097395241] [2024-11-27 20:10:45,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:45,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:10:45,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:45,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:10:45,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:10:45,025 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 20:10:45,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 402 transitions, 6612 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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) [2024-11-27 20:10:45,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:45,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 20:10:45,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:48,475 INFO L124 PetriNetUnfolderBase]: 9747/16144 cut-off events. [2024-11-27 20:10:48,475 INFO L125 PetriNetUnfolderBase]: For 214558/214848 co-relation queries the response was YES. [2024-11-27 20:10:48,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96812 conditions, 16144 events. 9747/16144 cut-off events. For 214558/214848 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 117143 event pairs, 916 based on Foata normal form. 174/15650 useless extension candidates. Maximal degree in co-relation 79413. Up to 3912 conditions per place. [2024-11-27 20:10:48,653 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 236 selfloop transitions, 221 changer transitions 0/502 dead transitions. [2024-11-27 20:10:48,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 502 transitions, 8880 flow [2024-11-27 20:10:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:10:48,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:10:48,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-11-27 20:10:48,656 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-11-27 20:10:48,656 INFO L175 Difference]: Start difference. First operand has 136 places, 402 transitions, 6612 flow. Second operand 6 states and 124 transitions. [2024-11-27 20:10:48,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 502 transitions, 8880 flow [2024-11-27 20:10:49,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 502 transitions, 8705 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-11-27 20:10:49,753 INFO L231 Difference]: Finished difference. Result has 145 places, 450 transitions, 8077 flow [2024-11-27 20:10:49,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6477, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8077, PETRI_PLACES=145, PETRI_TRANSITIONS=450} [2024-11-27 20:10:49,754 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 107 predicate places. [2024-11-27 20:10:49,754 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 450 transitions, 8077 flow [2024-11-27 20:10:49,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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) [2024-11-27 20:10:49,754 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:49,754 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, 1] [2024-11-27 20:10:49,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-27 20:10:49,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:49,955 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:49,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:49,955 INFO L85 PathProgramCache]: Analyzing trace with hash -143371924, now seen corresponding path program 7 times [2024-11-27 20:10:49,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:49,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970122674] [2024-11-27 20:10:49,956 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:10:49,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:49,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:49,958 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:49,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 20:10:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:50,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:10:50,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:50,290 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:10:50,290 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:50,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970122674] [2024-11-27 20:10:50,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970122674] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:50,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:50,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:10:50,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451856394] [2024-11-27 20:10:50,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:50,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:10:50,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:50,292 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:10:50,292 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:10:50,318 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 20:10:50,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 450 transitions, 8077 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:50,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:50,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 20:10:50,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:53,909 INFO L124 PetriNetUnfolderBase]: 9889/16248 cut-off events. [2024-11-27 20:10:53,910 INFO L125 PetriNetUnfolderBase]: For 270920/271212 co-relation queries the response was YES. [2024-11-27 20:10:54,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108021 conditions, 16248 events. 9889/16248 cut-off events. For 270920/271212 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 118673 event pairs, 2074 based on Foata normal form. 48/15432 useless extension candidates. Maximal degree in co-relation 90869. Up to 6790 conditions per place. [2024-11-27 20:10:54,126 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 363 selfloop transitions, 70 changer transitions 11/554 dead transitions. [2024-11-27 20:10:54,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 554 transitions, 10746 flow [2024-11-27 20:10:54,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:10:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:10:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-11-27 20:10:54,129 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-27 20:10:54,129 INFO L175 Difference]: Start difference. First operand has 145 places, 450 transitions, 8077 flow. Second operand 6 states and 117 transitions. [2024-11-27 20:10:54,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 554 transitions, 10746 flow [2024-11-27 20:10:55,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 554 transitions, 10736 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-11-27 20:10:55,943 INFO L231 Difference]: Finished difference. Result has 152 places, 472 transitions, 8794 flow [2024-11-27 20:10:55,944 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=8071, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8794, PETRI_PLACES=152, PETRI_TRANSITIONS=472} [2024-11-27 20:10:55,944 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 114 predicate places. [2024-11-27 20:10:55,945 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 472 transitions, 8794 flow [2024-11-27 20:10:55,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:55,945 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:55,945 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, 1] [2024-11-27 20:10:55,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-27 20:10:56,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:56,146 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:10:56,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:56,146 INFO L85 PathProgramCache]: Analyzing trace with hash 817276100, now seen corresponding path program 8 times [2024-11-27 20:10:56,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:10:56,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350968662] [2024-11-27 20:10:56,147 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:10:56,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:56,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:56,149 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:56,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 20:10:56,319 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:10:56,319 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:56,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:10:56,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:56,473 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:10:56,473 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:10:56,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350968662] [2024-11-27 20:10:56,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350968662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:56,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:56,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:10:56,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314945755] [2024-11-27 20:10:56,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:56,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:10:56,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:10:56,475 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:10:56,475 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:10:56,500 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 20:10:56,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 472 transitions, 8794 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:56,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:56,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 20:10:56,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:59,899 INFO L124 PetriNetUnfolderBase]: 9557/15584 cut-off events. [2024-11-27 20:10:59,899 INFO L125 PetriNetUnfolderBase]: For 286784/287160 co-relation queries the response was YES. [2024-11-27 20:11:00,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106257 conditions, 15584 events. 9557/15584 cut-off events. For 286784/287160 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 112125 event pairs, 1674 based on Foata normal form. 86/14754 useless extension candidates. Maximal degree in co-relation 102626. Up to 5392 conditions per place. [2024-11-27 20:11:00,326 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 377 selfloop transitions, 83 changer transitions 15/585 dead transitions. [2024-11-27 20:11:00,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 585 transitions, 11590 flow [2024-11-27 20:11:00,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:11:00,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:11:00,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-11-27 20:11:00,328 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-27 20:11:00,328 INFO L175 Difference]: Start difference. First operand has 152 places, 472 transitions, 8794 flow. Second operand 6 states and 117 transitions. [2024-11-27 20:11:00,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 585 transitions, 11590 flow [2024-11-27 20:11:01,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 585 transitions, 11514 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-27 20:11:01,693 INFO L231 Difference]: Finished difference. Result has 156 places, 488 transitions, 9393 flow [2024-11-27 20:11:01,694 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=8737, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9393, PETRI_PLACES=156, PETRI_TRANSITIONS=488} [2024-11-27 20:11:01,694 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 118 predicate places. [2024-11-27 20:11:01,694 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 488 transitions, 9393 flow [2024-11-27 20:11:01,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:11:01,694 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:11:01,694 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, 1, 1, 1] [2024-11-27 20:11:01,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-27 20:11:01,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:01,895 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:11:01,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:11:01,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1417807688, now seen corresponding path program 1 times [2024-11-27 20:11:01,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:11:01,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424210143] [2024-11-27 20:11:01,896 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:11:01,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:01,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:01,897 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:01,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 20:11:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:11:02,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:11:02,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:11:02,043 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:11:02,043 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:11:02,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424210143] [2024-11-27 20:11:02,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424210143] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:11:02,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:11:02,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:11:02,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211780565] [2024-11-27 20:11:02,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:11:02,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:11:02,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:11:02,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:11:02,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:11:02,057 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2024-11-27 20:11:02,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 488 transitions, 9393 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2024-11-27 20:11:02,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:11:02,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2024-11-27 20:11:02,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:11:06,463 INFO L124 PetriNetUnfolderBase]: 12995/18922 cut-off events. [2024-11-27 20:11:06,463 INFO L125 PetriNetUnfolderBase]: For 348924/349008 co-relation queries the response was YES. [2024-11-27 20:11:06,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123459 conditions, 18922 events. 12995/18922 cut-off events. For 348924/349008 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 112012 event pairs, 1356 based on Foata normal form. 20/18530 useless extension candidates. Maximal degree in co-relation 114844. Up to 10012 conditions per place. [2024-11-27 20:11:06,657 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 415 selfloop transitions, 24 changer transitions 35/612 dead transitions. [2024-11-27 20:11:06,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 612 transitions, 12134 flow [2024-11-27 20:11:06,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:11:06,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:11:06,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-11-27 20:11:06,659 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4829059829059829 [2024-11-27 20:11:06,659 INFO L175 Difference]: Start difference. First operand has 156 places, 488 transitions, 9393 flow. Second operand 6 states and 113 transitions. [2024-11-27 20:11:06,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 612 transitions, 12134 flow [2024-11-27 20:11:09,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 612 transitions, 11024 flow, removed 26 selfloop flow, removed 17 redundant places. [2024-11-27 20:11:09,219 INFO L231 Difference]: Finished difference. Result has 147 places, 419 transitions, 6791 flow [2024-11-27 20:11:09,219 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7098, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6791, PETRI_PLACES=147, PETRI_TRANSITIONS=419} [2024-11-27 20:11:09,219 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 109 predicate places. [2024-11-27 20:11:09,219 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 419 transitions, 6791 flow [2024-11-27 20:11:09,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2024-11-27 20:11:09,220 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:11:09,220 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, 1, 1, 1, 1, 1, 1] [2024-11-27 20:11:09,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-27 20:11:09,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:09,424 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:11:09,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:11:09,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2106980899, now seen corresponding path program 1 times [2024-11-27 20:11:09,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:11:09,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934693513] [2024-11-27 20:11:09,425 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:11:09,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:09,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:09,428 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:09,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-27 20:11:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:11:09,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:11:09,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:09,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:11:09,699 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:11:09,699 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:11:09,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934693513] [2024-11-27 20:11:09,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934693513] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:11:09,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:11:09,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:11:09,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496808630] [2024-11-27 20:11:09,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:11:09,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:11:09,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:11:09,700 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:11:09,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:11:09,719 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 20:11:09,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 419 transitions, 6791 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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) [2024-11-27 20:11:09,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:11:09,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 20:11:09,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:11:12,567 INFO L124 PetriNetUnfolderBase]: 7855/13076 cut-off events. [2024-11-27 20:11:12,567 INFO L125 PetriNetUnfolderBase]: For 170581/171037 co-relation queries the response was YES. [2024-11-27 20:11:12,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82133 conditions, 13076 events. 7855/13076 cut-off events. For 170581/171037 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 92697 event pairs, 1784 based on Foata normal form. 64/12861 useless extension candidates. Maximal degree in co-relation 66461. Up to 6590 conditions per place. [2024-11-27 20:11:12,716 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 266 selfloop transitions, 97 changer transitions 16/485 dead transitions. [2024-11-27 20:11:12,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 485 transitions, 8308 flow [2024-11-27 20:11:12,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:11:12,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:11:12,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-11-27 20:11:12,718 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-11-27 20:11:12,718 INFO L175 Difference]: Start difference. First operand has 147 places, 419 transitions, 6791 flow. Second operand 6 states and 124 transitions. [2024-11-27 20:11:12,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 485 transitions, 8308 flow [2024-11-27 20:11:13,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 485 transitions, 8304 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-11-27 20:11:13,253 INFO L231 Difference]: Finished difference. Result has 153 places, 416 transitions, 6960 flow [2024-11-27 20:11:13,254 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6787, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6960, PETRI_PLACES=153, PETRI_TRANSITIONS=416} [2024-11-27 20:11:13,255 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 115 predicate places. [2024-11-27 20:11:13,255 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 416 transitions, 6960 flow [2024-11-27 20:11:13,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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) [2024-11-27 20:11:13,255 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:11:13,255 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, 1, 1, 1, 1, 1, 1] [2024-11-27 20:11:13,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-27 20:11:13,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:13,456 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:11:13,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:11:13,457 INFO L85 PathProgramCache]: Analyzing trace with hash -207339157, now seen corresponding path program 2 times [2024-11-27 20:11:13,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:11:13,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131207221] [2024-11-27 20:11:13,457 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:11:13,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:13,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:13,459 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:13,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-27 20:11:13,596 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:11:13,596 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:11:13,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:11:13,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:11:13,786 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:11:13,786 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:11:13,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131207221] [2024-11-27 20:11:13,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131207221] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:11:13,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:11:13,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:11:13,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156565939] [2024-11-27 20:11:13,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:11:13,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:11:13,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:11:13,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:11:13,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:11:13,814 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 20:11:13,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 416 transitions, 6960 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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) [2024-11-27 20:11:13,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:11:13,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 20:11:13,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:11:17,514 INFO L124 PetriNetUnfolderBase]: 8785/14414 cut-off events. [2024-11-27 20:11:17,515 INFO L125 PetriNetUnfolderBase]: For 230389/230997 co-relation queries the response was YES. [2024-11-27 20:11:17,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92507 conditions, 14414 events. 8785/14414 cut-off events. For 230389/230997 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 102303 event pairs, 662 based on Foata normal form. 448/14575 useless extension candidates. Maximal degree in co-relation 89490. Up to 6020 conditions per place. [2024-11-27 20:11:17,670 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 294 selfloop transitions, 131 changer transitions 3/534 dead transitions. [2024-11-27 20:11:17,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 534 transitions, 9420 flow [2024-11-27 20:11:17,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:11:17,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 20:11:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-11-27 20:11:17,673 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5032051282051282 [2024-11-27 20:11:17,673 INFO L175 Difference]: Start difference. First operand has 153 places, 416 transitions, 6960 flow. Second operand 8 states and 157 transitions. [2024-11-27 20:11:17,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 534 transitions, 9420 flow [2024-11-27 20:11:18,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 534 transitions, 9174 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-27 20:11:18,476 INFO L231 Difference]: Finished difference. Result has 158 places, 452 transitions, 7883 flow [2024-11-27 20:11:18,476 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6789, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7883, PETRI_PLACES=158, PETRI_TRANSITIONS=452} [2024-11-27 20:11:18,477 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 120 predicate places. [2024-11-27 20:11:18,477 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 452 transitions, 7883 flow [2024-11-27 20:11:18,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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) [2024-11-27 20:11:18,477 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:11:18,477 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, 1, 1, 1, 1, 1, 1] [2024-11-27 20:11:18,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-27 20:11:18,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:18,677 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:11:18,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:11:18,678 INFO L85 PathProgramCache]: Analyzing trace with hash 883348855, now seen corresponding path program 3 times [2024-11-27 20:11:18,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:11:18,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898191661] [2024-11-27 20:11:18,678 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:11:18,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:18,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:18,680 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:18,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-27 20:11:18,812 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-27 20:11:18,813 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:11:18,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:11:18,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:11:19,227 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:11:19,227 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:11:19,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898191661] [2024-11-27 20:11:19,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898191661] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:11:19,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:11:19,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:11:19,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266288076] [2024-11-27 20:11:19,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:11:19,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:11:19,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:11:19,228 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:11:19,228 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:11:19,237 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 20:11:19,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 452 transitions, 7883 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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) [2024-11-27 20:11:19,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:11:19,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 20:11:19,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:11:22,245 INFO L124 PetriNetUnfolderBase]: 8969/14986 cut-off events. [2024-11-27 20:11:22,245 INFO L125 PetriNetUnfolderBase]: For 246447/247109 co-relation queries the response was YES. [2024-11-27 20:11:22,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97631 conditions, 14986 events. 8969/14986 cut-off events. For 246447/247109 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 109880 event pairs, 2044 based on Foata normal form. 70/14699 useless extension candidates. Maximal degree in co-relation 95396. Up to 8690 conditions per place. [2024-11-27 20:11:22,431 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 251 selfloop transitions, 141 changer transitions 7/505 dead transitions. [2024-11-27 20:11:22,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 505 transitions, 9309 flow [2024-11-27 20:11:22,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:11:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:11:22,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-11-27 20:11:22,434 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2024-11-27 20:11:22,434 INFO L175 Difference]: Start difference. First operand has 158 places, 452 transitions, 7883 flow. Second operand 6 states and 124 transitions. [2024-11-27 20:11:22,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 505 transitions, 9309 flow [2024-11-27 20:11:23,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 505 transitions, 9083 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-11-27 20:11:23,578 INFO L231 Difference]: Finished difference. Result has 160 places, 454 transitions, 8031 flow [2024-11-27 20:11:23,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7669, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8031, PETRI_PLACES=160, PETRI_TRANSITIONS=454} [2024-11-27 20:11:23,579 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 122 predicate places. [2024-11-27 20:11:23,579 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 454 transitions, 8031 flow [2024-11-27 20:11:23,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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) [2024-11-27 20:11:23,579 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:11:23,579 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, 1, 1, 1, 1, 1, 1] [2024-11-27 20:11:23,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-27 20:11:23,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:23,780 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:11:23,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:11:23,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1013527911, now seen corresponding path program 4 times [2024-11-27 20:11:23,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:11:23,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778638217] [2024-11-27 20:11:23,781 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:11:23,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:23,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:23,783 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:23,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-27 20:11:23,910 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:11:23,910 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:11:23,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:11:23,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:11:24,013 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:11:24,013 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:11:24,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778638217] [2024-11-27 20:11:24,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778638217] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:11:24,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:11:24,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:11:24,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524274104] [2024-11-27 20:11:24,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:11:24,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:11:24,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:11:24,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:11:24,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:11:24,025 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 20:11:24,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 454 transitions, 8031 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2024-11-27 20:11:24,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:11:24,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 20:11:24,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:11:27,577 INFO L124 PetriNetUnfolderBase]: 9169/15270 cut-off events. [2024-11-27 20:11:27,577 INFO L125 PetriNetUnfolderBase]: For 277975/278733 co-relation queries the response was YES. [2024-11-27 20:11:27,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99473 conditions, 15270 events. 9169/15270 cut-off events. For 277975/278733 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 112636 event pairs, 2082 based on Foata normal form. 408/15289 useless extension candidates. Maximal degree in co-relation 98570. Up to 8881 conditions per place. [2024-11-27 20:11:27,755 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 251 selfloop transitions, 150 changer transitions 0/507 dead transitions. [2024-11-27 20:11:27,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 507 transitions, 9308 flow [2024-11-27 20:11:27,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:11:27,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:11:27,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-11-27 20:11:27,757 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5598290598290598 [2024-11-27 20:11:27,757 INFO L175 Difference]: Start difference. First operand has 160 places, 454 transitions, 8031 flow. Second operand 6 states and 131 transitions. [2024-11-27 20:11:27,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 507 transitions, 9308 flow [2024-11-27 20:11:29,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 507 transitions, 8998 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-11-27 20:11:29,066 INFO L231 Difference]: Finished difference. Result has 161 places, 460 transitions, 8081 flow [2024-11-27 20:11:29,066 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7463, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8081, PETRI_PLACES=161, PETRI_TRANSITIONS=460} [2024-11-27 20:11:29,066 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 123 predicate places. [2024-11-27 20:11:29,066 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 460 transitions, 8081 flow [2024-11-27 20:11:29,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2024-11-27 20:11:29,067 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:11:29,067 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, 1, 1, 1, 1, 1, 1] [2024-11-27 20:11:29,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-27 20:11:29,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:29,267 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:11:29,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:11:29,268 INFO L85 PathProgramCache]: Analyzing trace with hash 304378669, now seen corresponding path program 5 times [2024-11-27 20:11:29,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:11:29,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100331338] [2024-11-27 20:11:29,268 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:11:29,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:29,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:29,271 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:29,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-27 20:11:29,421 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:11:29,421 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:11:29,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:11:29,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:11:29,636 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:11:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:11:29,739 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:11:29,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100331338] [2024-11-27 20:11:29,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100331338] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:11:29,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:11:29,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-27 20:11:29,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955885236] [2024-11-27 20:11:29,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:11:29,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:11:29,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:11:29,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:11:29,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:11:29,754 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 20:11:29,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 460 transitions, 8081 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2024-11-27 20:11:29,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:11:29,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 20:11:29,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:11:33,914 INFO L124 PetriNetUnfolderBase]: 11033/18284 cut-off events. [2024-11-27 20:11:33,914 INFO L125 PetriNetUnfolderBase]: For 281879/282291 co-relation queries the response was YES. [2024-11-27 20:11:34,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115264 conditions, 18284 events. 11033/18284 cut-off events. For 281879/282291 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 135872 event pairs, 1828 based on Foata normal form. 200/18159 useless extension candidates. Maximal degree in co-relation 114425. Up to 8285 conditions per place. [2024-11-27 20:11:34,145 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 387 selfloop transitions, 163 changer transitions 17/616 dead transitions. [2024-11-27 20:11:34,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 616 transitions, 11580 flow [2024-11-27 20:11:34,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:11:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:11:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-11-27 20:11:34,148 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.594017094017094 [2024-11-27 20:11:34,148 INFO L175 Difference]: Start difference. First operand has 161 places, 460 transitions, 8081 flow. Second operand 6 states and 139 transitions. [2024-11-27 20:11:34,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 616 transitions, 11580 flow [2024-11-27 20:11:35,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 616 transitions, 11282 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-11-27 20:11:35,439 INFO L231 Difference]: Finished difference. Result has 168 places, 488 transitions, 8822 flow [2024-11-27 20:11:35,439 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7726, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8822, PETRI_PLACES=168, PETRI_TRANSITIONS=488} [2024-11-27 20:11:35,440 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 130 predicate places. [2024-11-27 20:11:35,440 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 488 transitions, 8822 flow [2024-11-27 20:11:35,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2024-11-27 20:11:35,440 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:11:35,440 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, 1, 1, 1, 1, 1, 1] [2024-11-27 20:11:35,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-27 20:11:35,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:35,641 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-27 20:11:35,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:11:35,641 INFO L85 PathProgramCache]: Analyzing trace with hash -758128423, now seen corresponding path program 6 times [2024-11-27 20:11:35,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:11:35,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061331149] [2024-11-27 20:11:35,642 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:11:35,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:35,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:35,644 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:35,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_146bca63-ac90-4606-8fc7-dcc105d26edb/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-27 20:11:35,803 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-27 20:11:35,803 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:11:35,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:11:35,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:11:36,031 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:11:36,031 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:11:36,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061331149] [2024-11-27 20:11:36,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061331149] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:11:36,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:11:36,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:11:36,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442348919] [2024-11-27 20:11:36,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:11:36,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:11:36,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:11:36,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:11:36,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:11:36,065 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2024-11-27 20:11:36,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 488 transitions, 8822 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 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) [2024-11-27 20:11:36,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:11:36,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2024-11-27 20:11:36,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand