./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.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_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/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_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/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_7e592b62-0bbf-4e50-afb5-9489071580c7/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 fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:58:50,440 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:58:50,500 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 03:58:50,505 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:58:50,506 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:58:50,534 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:58:50,535 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:58:50,535 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:58:50,535 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:58:50,535 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:58:50,535 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:58:50,535 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:58:50,536 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:58:50,537 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:58:50,538 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:58:50,538 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:58:50,539 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:58:50,539 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:58:50,539 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:58:50,539 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:58:50,539 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:58:50,539 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:58:50,540 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:58:50,540 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:58:50,540 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:58:50,540 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:58:50,540 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:58:50,540 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:58:50,540 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:58:50,540 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:58:50,541 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:58:50,541 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:58:50,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:58:50,541 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:58:50,541 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:58:50,541 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:58:50,541 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:58:50,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:58:50,542 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:58:50,542 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:58:50,542 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:58:50,542 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:58:50,542 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:58:50,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:58:50,542 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:58:50,542 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:58:50,542 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:58:50,542 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:58:50,543 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_7e592b62-0bbf-4e50-afb5-9489071580c7/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 -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2024-11-28 03:58:50,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:58:50,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:58:50,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:58:50,862 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:58:50,863 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:58:50,864 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2024-11-28 03:58:53,911 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/data/9b817d200/1c6506a60b73421886a0b98eaa444cb0/FLAGb73b65772 [2024-11-28 03:58:54,198 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:58:54,198 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2024-11-28 03:58:54,207 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/data/9b817d200/1c6506a60b73421886a0b98eaa444cb0/FLAGb73b65772 [2024-11-28 03:58:54,224 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/data/9b817d200/1c6506a60b73421886a0b98eaa444cb0 [2024-11-28 03:58:54,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:58:54,228 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:58:54,230 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:58:54,230 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:58:54,235 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:58:54,236 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:58:54" (1/1) ... [2024-11-28 03:58:54,237 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a23171c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:58:54, skipping insertion in model container [2024-11-28 03:58:54,237 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:58:54" (1/1) ... [2024-11-28 03:58:54,253 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:58:54,471 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_7e592b62-0bbf-4e50-afb5-9489071580c7/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2024-11-28 03:58:54,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:58:54,485 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:58:54,509 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_7e592b62-0bbf-4e50-afb5-9489071580c7/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2063,2076] [2024-11-28 03:58:54,510 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:58:54,533 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:58:54,533 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:58:54 WrapperNode [2024-11-28 03:58:54,534 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:58:54,535 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:58:54,535 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:58:54,536 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:58:54,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:58:54" (1/1) ... [2024-11-28 03:58:54,557 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:58:54" (1/1) ... [2024-11-28 03:58:54,575 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 41 [2024-11-28 03:58:54,577 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:58:54,577 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:58:54,578 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:58:54,578 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:58:54,588 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:58:54" (1/1) ... [2024-11-28 03:58:54,588 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:58:54" (1/1) ... [2024-11-28 03:58:54,594 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:58:54" (1/1) ... [2024-11-28 03:58:54,615 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 03:58:54,615 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:58:54" (1/1) ... [2024-11-28 03:58:54,615 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:58:54" (1/1) ... [2024-11-28 03:58:54,623 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:58:54" (1/1) ... [2024-11-28 03:58:54,624 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:58:54" (1/1) ... [2024-11-28 03:58:54,631 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:58:54" (1/1) ... [2024-11-28 03:58:54,632 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:58:54" (1/1) ... [2024-11-28 03:58:54,633 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:58:54" (1/1) ... [2024-11-28 03:58:54,636 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:58:54,636 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:58:54,637 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:58:54,637 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:58:54,639 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:58:54" (1/1) ... [2024-11-28 03:58:54,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:58:54,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:58:54,678 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:58:54,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:58:54,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:58:54,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 03:58:54,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 03:58:54,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 03:58:54,715 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 03:58:54,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:58:54,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 03:58:54,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 03:58:54,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:58:54,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:58:54,717 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 03:58:54,798 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:58:54,801 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:58:55,003 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:58:55,003 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:58:55,178 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:58:55,179 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-28 03:58:55,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:58:55 BoogieIcfgContainer [2024-11-28 03:58:55,179 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:58:55,181 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:58:55,182 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:58:55,189 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:58:55,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:58:54" (1/3) ... [2024-11-28 03:58:55,191 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c4c2b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:58:55, skipping insertion in model container [2024-11-28 03:58:55,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:58:54" (2/3) ... [2024-11-28 03:58:55,191 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c4c2b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:58:55, skipping insertion in model container [2024-11-28 03:58:55,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:58:55" (3/3) ... [2024-11-28 03:58:55,193 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2024-11-28 03:58:55,215 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:58:55,216 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-nonblocking-cntr.wvr.c that has 3 procedures, 20 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-28 03:58:55,217 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:58:55,284 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 03:58:55,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-11-28 03:58:55,364 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-11-28 03:58:55,366 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 03:58:55,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-11-28 03:58:55,370 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-11-28 03:58:55,375 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-11-28 03:58:55,385 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:58:55,397 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;@54b90649, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:58:55,398 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-28 03:58:55,407 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:58:55,408 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-11-28 03:58:55,408 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 03:58:55,408 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:58:55,409 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:58:55,409 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:58:55,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:58:55,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1480051232, now seen corresponding path program 1 times [2024-11-28 03:58:55,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:58:55,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748288334] [2024-11-28 03:58:55,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:58:55,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:58:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:58:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:58:55,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:58:55,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748288334] [2024-11-28 03:58:55,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748288334] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:58:55,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:58:55,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:58:55,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54240936] [2024-11-28 03:58:55,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:58:55,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:58:55,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:58:55,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:58:55,830 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:58:55,845 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-28 03:58:55,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2024-11-28 03:58:55,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:58:55,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-28 03:58:55,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:58:55,965 INFO L124 PetriNetUnfolderBase]: 70/138 cut-off events. [2024-11-28 03:58:55,966 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-28 03:58:55,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 138 events. 70/138 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 418 event pairs, 31 based on Foata normal form. 8/142 useless extension candidates. Maximal degree in co-relation 253. Up to 86 conditions per place. [2024-11-28 03:58:55,971 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 20 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2024-11-28 03:58:55,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 26 transitions, 113 flow [2024-11-28 03:58:55,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:58:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:58:55,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-11-28 03:58:55,987 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-11-28 03:58:55,990 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 4 states and 44 transitions. [2024-11-28 03:58:55,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 26 transitions, 113 flow [2024-11-28 03:58:55,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 26 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 03:58:56,000 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 54 flow [2024-11-28 03:58:56,004 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2024-11-28 03:58:56,007 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2024-11-28 03:58:56,008 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 54 flow [2024-11-28 03:58:56,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2024-11-28 03:58:56,008 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:58:56,008 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:58:56,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:58:56,009 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:58:56,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:58:56,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1348133238, now seen corresponding path program 1 times [2024-11-28 03:58:56,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:58:56,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152784400] [2024-11-28 03:58:56,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:58:56,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:58:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:58:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:58:56,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:58:56,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152784400] [2024-11-28 03:58:56,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152784400] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:58:56,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:58:56,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:58:56,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303829964] [2024-11-28 03:58:56,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:58:56,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:58:56,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:58:56,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:58:56,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:58:56,201 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-28 03:58:56,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2024-11-28 03:58:56,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:58:56,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-28 03:58:56,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:58:56,347 INFO L124 PetriNetUnfolderBase]: 89/180 cut-off events. [2024-11-28 03:58:56,347 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-11-28 03:58:56,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 180 events. 89/180 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 617 event pairs, 49 based on Foata normal form. 13/188 useless extension candidates. Maximal degree in co-relation 87. Up to 124 conditions per place. [2024-11-28 03:58:56,352 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-11-28 03:58:56,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 129 flow [2024-11-28 03:58:56,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:58:56,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:58:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-11-28 03:58:56,353 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-11-28 03:58:56,353 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 54 flow. Second operand 4 states and 43 transitions. [2024-11-28 03:58:56,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 129 flow [2024-11-28 03:58:56,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 123 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:58:56,355 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-11-28 03:58:56,355 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2024-11-28 03:58:56,356 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-11-28 03:58:56,356 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-11-28 03:58:56,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2024-11-28 03:58:56,357 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:58:56,357 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:58:56,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:58:56,357 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:58:56,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:58:56,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1876461988, now seen corresponding path program 1 times [2024-11-28 03:58:56,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:58:56,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840918153] [2024-11-28 03:58:56,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:58:56,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:58:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:58:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:58:56,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:58:56,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840918153] [2024-11-28 03:58:56,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840918153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:58:56,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503189946] [2024-11-28 03:58:56,552 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:58:56,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:58:56,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:58:56,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:58:56,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:58:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:58:56,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:58:56,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:58:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:58:56,727 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:58:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:58:57,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503189946] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:58:57,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:58:57,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 5 [2024-11-28 03:58:57,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942527560] [2024-11-28 03:58:57,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:58:57,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:58:57,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:58:57,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:58:57,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:58:57,098 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-28 03:58:57,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:58:57,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:58:57,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-28 03:58:57,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:58:57,273 INFO L124 PetriNetUnfolderBase]: 153/301 cut-off events. [2024-11-28 03:58:57,274 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-11-28 03:58:57,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 301 events. 153/301 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1142 event pairs, 23 based on Foata normal form. 1/293 useless extension candidates. Maximal degree in co-relation 236. Up to 97 conditions per place. [2024-11-28 03:58:57,280 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 35 selfloop transitions, 5 changer transitions 3/46 dead transitions. [2024-11-28 03:58:57,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 46 transitions, 238 flow [2024-11-28 03:58:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:58:57,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:58:57,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2024-11-28 03:58:57,283 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7023809523809523 [2024-11-28 03:58:57,283 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 4 states and 59 transitions. [2024-11-28 03:58:57,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 46 transitions, 238 flow [2024-11-28 03:58:57,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 46 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:58:57,287 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 98 flow [2024-11-28 03:58:57,287 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2024-11-28 03:58:57,289 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 5 predicate places. [2024-11-28 03:58:57,289 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 98 flow [2024-11-28 03:58:57,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:58:57,289 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:58:57,290 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:58:57,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 03:58:57,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:58:57,494 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:58:57,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:58:57,495 INFO L85 PathProgramCache]: Analyzing trace with hash -348810224, now seen corresponding path program 2 times [2024-11-28 03:58:57,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:58:57,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185928722] [2024-11-28 03:58:57,496 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:58:57,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:58:57,513 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:58:57,513 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:58:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:58:57,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:58:57,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185928722] [2024-11-28 03:58:57,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185928722] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:58:57,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380775319] [2024-11-28 03:58:57,675 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:58:57,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:58:57,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:58:57,678 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:58:57,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:58:57,736 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:58:57,737 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:58:57,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:58:57,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:58:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:58:57,840 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:58:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:58:58,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380775319] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:58:58,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:58:58,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-28 03:58:58,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935594793] [2024-11-28 03:58:58,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:58:58,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:58:58,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:58:58,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:58:58,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:58:58,072 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-28 03:58:58,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 98 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 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) [2024-11-28 03:58:58,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:58:58,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-28 03:58:58,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:58:58,305 INFO L124 PetriNetUnfolderBase]: 286/530 cut-off events. [2024-11-28 03:58:58,305 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2024-11-28 03:58:58,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1479 conditions, 530 events. 286/530 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2184 event pairs, 42 based on Foata normal form. 18/547 useless extension candidates. Maximal degree in co-relation 507. Up to 242 conditions per place. [2024-11-28 03:58:58,312 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 40 selfloop transitions, 13 changer transitions 0/55 dead transitions. [2024-11-28 03:58:58,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 335 flow [2024-11-28 03:58:58,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:58:58,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:58:58,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-11-28 03:58:58,317 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-11-28 03:58:58,317 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 98 flow. Second operand 6 states and 64 transitions. [2024-11-28 03:58:58,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 335 flow [2024-11-28 03:58:58,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 55 transitions, 335 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-28 03:58:58,322 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 219 flow [2024-11-28 03:58:58,323 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=219, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2024-11-28 03:58:58,323 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 14 predicate places. [2024-11-28 03:58:58,323 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 219 flow [2024-11-28 03:58:58,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 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) [2024-11-28 03:58:58,324 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:58:58,325 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:58:58,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:58:58,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:58:58,529 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:58:58,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:58:58,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1995159394, now seen corresponding path program 3 times [2024-11-28 03:58:58,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:58:58,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617994799] [2024-11-28 03:58:58,531 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:58:58,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:58:58,552 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:58:58,553 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:58:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:58:58,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:58:58,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617994799] [2024-11-28 03:58:58,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617994799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:58:58,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148648752] [2024-11-28 03:58:58,791 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:58:58,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:58:58,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:58:58,797 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:58:58,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:58:58,856 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:58:58,856 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:58:58,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:58:58,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:58:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:58:59,097 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:58:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:58:59,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148648752] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:58:59,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:58:59,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 20 [2024-11-28 03:58:59,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704248203] [2024-11-28 03:58:59,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:58:59,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:58:59,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:58:59,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:58:59,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:58:59,358 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 03:58:59,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 219 flow. Second operand has 20 states, 20 states have (on average 5.6) internal successors, (112), 20 states have internal predecessors, (112), 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) [2024-11-28 03:58:59,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:58:59,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 03:58:59,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:00,692 INFO L124 PetriNetUnfolderBase]: 627/1078 cut-off events. [2024-11-28 03:59:00,693 INFO L125 PetriNetUnfolderBase]: For 1759/1759 co-relation queries the response was YES. [2024-11-28 03:59:00,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3640 conditions, 1078 events. 627/1078 cut-off events. For 1759/1759 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4720 event pairs, 3 based on Foata normal form. 29/1107 useless extension candidates. Maximal degree in co-relation 2364. Up to 211 conditions per place. [2024-11-28 03:59:00,701 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 118 selfloop transitions, 97 changer transitions 23/239 dead transitions. [2024-11-28 03:59:00,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 239 transitions, 1673 flow [2024-11-28 03:59:00,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-28 03:59:00,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-28 03:59:00,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 321 transitions. [2024-11-28 03:59:00,705 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40225563909774437 [2024-11-28 03:59:00,705 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 219 flow. Second operand 38 states and 321 transitions. [2024-11-28 03:59:00,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 239 transitions, 1673 flow [2024-11-28 03:59:00,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 239 transitions, 1665 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-28 03:59:00,723 INFO L231 Difference]: Finished difference. Result has 94 places, 114 transitions, 1096 flow [2024-11-28 03:59:00,723 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1096, PETRI_PLACES=94, PETRI_TRANSITIONS=114} [2024-11-28 03:59:00,725 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 71 predicate places. [2024-11-28 03:59:00,725 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 114 transitions, 1096 flow [2024-11-28 03:59:00,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.6) internal successors, (112), 20 states have internal predecessors, (112), 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) [2024-11-28 03:59:00,726 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:00,726 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:00,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:59:00,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:00,927 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:59:00,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:00,928 INFO L85 PathProgramCache]: Analyzing trace with hash 137408708, now seen corresponding path program 4 times [2024-11-28 03:59:00,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:00,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701607745] [2024-11-28 03:59:00,928 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:59:00,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:00,945 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:59:00,945 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:01,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:01,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701607745] [2024-11-28 03:59:01,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701607745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:01,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509505884] [2024-11-28 03:59:01,052 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:59:01,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:01,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:01,054 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:01,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:59:01,102 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:59:01,102 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:01,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:59:01,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:01,197 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:01,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509505884] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:59:01,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:59:01,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-11-28 03:59:01,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802682180] [2024-11-28 03:59:01,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:59:01,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:59:01,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:01,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:59:01,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:59:01,286 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 03:59:01,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 114 transitions, 1096 flow. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 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) [2024-11-28 03:59:01,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:01,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 03:59:01,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:01,857 INFO L124 PetriNetUnfolderBase]: 889/1517 cut-off events. [2024-11-28 03:59:01,857 INFO L125 PetriNetUnfolderBase]: For 15379/15379 co-relation queries the response was YES. [2024-11-28 03:59:01,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8269 conditions, 1517 events. 889/1517 cut-off events. For 15379/15379 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7194 event pairs, 69 based on Foata normal form. 71/1588 useless extension candidates. Maximal degree in co-relation 7185. Up to 391 conditions per place. [2024-11-28 03:59:01,875 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 129 selfloop transitions, 135 changer transitions 0/265 dead transitions. [2024-11-28 03:59:01,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 265 transitions, 3003 flow [2024-11-28 03:59:01,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 03:59:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 03:59:01,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 153 transitions. [2024-11-28 03:59:01,877 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-11-28 03:59:01,877 INFO L175 Difference]: Start difference. First operand has 94 places, 114 transitions, 1096 flow. Second operand 16 states and 153 transitions. [2024-11-28 03:59:01,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 265 transitions, 3003 flow [2024-11-28 03:59:01,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 265 transitions, 2778 flow, removed 105 selfloop flow, removed 4 redundant places. [2024-11-28 03:59:01,922 INFO L231 Difference]: Finished difference. Result has 115 places, 182 transitions, 2204 flow [2024-11-28 03:59:01,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2204, PETRI_PLACES=115, PETRI_TRANSITIONS=182} [2024-11-28 03:59:01,923 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 92 predicate places. [2024-11-28 03:59:01,923 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 182 transitions, 2204 flow [2024-11-28 03:59:01,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 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) [2024-11-28 03:59:01,923 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:01,923 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:01,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 03:59:02,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:02,124 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:59:02,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:02,124 INFO L85 PathProgramCache]: Analyzing trace with hash -765577430, now seen corresponding path program 5 times [2024-11-28 03:59:02,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:02,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071913017] [2024-11-28 03:59:02,125 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:59:02,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:02,135 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:59:02,135 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:02,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:02,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071913017] [2024-11-28 03:59:02,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071913017] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:02,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200696803] [2024-11-28 03:59:02,264 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:59:02,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:02,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:02,270 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:02,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:59:02,321 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:59:02,322 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:02,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:59:02,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:02,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:02,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200696803] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:59:02,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:59:02,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2024-11-28 03:59:02,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381005021] [2024-11-28 03:59:02,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:59:02,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:59:02,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:02,601 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:59:02,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:59:02,622 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 03:59:02,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 182 transitions, 2204 flow. Second operand has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 17 states have internal predecessors, (89), 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) [2024-11-28 03:59:02,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:02,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 03:59:02,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:04,020 INFO L124 PetriNetUnfolderBase]: 1412/2417 cut-off events. [2024-11-28 03:59:04,020 INFO L125 PetriNetUnfolderBase]: For 39715/39715 co-relation queries the response was YES. [2024-11-28 03:59:04,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15710 conditions, 2417 events. 1412/2417 cut-off events. For 39715/39715 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12901 event pairs, 42 based on Foata normal form. 57/2474 useless extension candidates. Maximal degree in co-relation 12848. Up to 451 conditions per place. [2024-11-28 03:59:04,050 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 172 selfloop transitions, 287 changer transitions 6/466 dead transitions. [2024-11-28 03:59:04,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 466 transitions, 6341 flow [2024-11-28 03:59:04,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 03:59:04,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-28 03:59:04,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 345 transitions. [2024-11-28 03:59:04,053 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-11-28 03:59:04,053 INFO L175 Difference]: Start difference. First operand has 115 places, 182 transitions, 2204 flow. Second operand 40 states and 345 transitions. [2024-11-28 03:59:04,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 466 transitions, 6341 flow [2024-11-28 03:59:04,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 466 transitions, 6039 flow, removed 151 selfloop flow, removed 0 redundant places. [2024-11-28 03:59:04,180 INFO L231 Difference]: Finished difference. Result has 179 places, 335 transitions, 5034 flow [2024-11-28 03:59:04,181 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2072, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=5034, PETRI_PLACES=179, PETRI_TRANSITIONS=335} [2024-11-28 03:59:04,182 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 156 predicate places. [2024-11-28 03:59:04,182 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 335 transitions, 5034 flow [2024-11-28 03:59:04,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 17 states have internal predecessors, (89), 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) [2024-11-28 03:59:04,184 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:04,184 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:04,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 03:59:04,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:04,384 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:59:04,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:04,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1039971358, now seen corresponding path program 6 times [2024-11-28 03:59:04,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:04,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308382545] [2024-11-28 03:59:04,385 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:59:04,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:04,400 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:59:04,400 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:04,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:04,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308382545] [2024-11-28 03:59:04,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308382545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:04,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902159566] [2024-11-28 03:59:04,536 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:59:04,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:04,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:04,539 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:04,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:59:04,597 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:59:04,598 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:04,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:59:04,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:04,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:04,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902159566] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:59:04,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:59:04,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2024-11-28 03:59:04,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782454340] [2024-11-28 03:59:04,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:59:04,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:59:04,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:04,904 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:59:04,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:59:04,907 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 03:59:04,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 335 transitions, 5034 flow. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 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) [2024-11-28 03:59:04,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:04,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 03:59:04,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:06,627 INFO L124 PetriNetUnfolderBase]: 1815/3055 cut-off events. [2024-11-28 03:59:06,627 INFO L125 PetriNetUnfolderBase]: For 92812/92812 co-relation queries the response was YES. [2024-11-28 03:59:06,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26501 conditions, 3055 events. 1815/3055 cut-off events. For 92812/92812 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16059 event pairs, 65 based on Foata normal form. 26/3081 useless extension candidates. Maximal degree in co-relation 23640. Up to 561 conditions per place. [2024-11-28 03:59:06,692 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 231 selfloop transitions, 367 changer transitions 3/602 dead transitions. [2024-11-28 03:59:06,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 602 transitions, 10707 flow [2024-11-28 03:59:06,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 03:59:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-28 03:59:06,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 274 transitions. [2024-11-28 03:59:06,696 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-11-28 03:59:06,696 INFO L175 Difference]: Start difference. First operand has 179 places, 335 transitions, 5034 flow. Second operand 32 states and 274 transitions. [2024-11-28 03:59:06,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 602 transitions, 10707 flow [2024-11-28 03:59:07,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 602 transitions, 10073 flow, removed 297 selfloop flow, removed 6 redundant places. [2024-11-28 03:59:07,150 INFO L231 Difference]: Finished difference. Result has 217 places, 479 transitions, 8372 flow [2024-11-28 03:59:07,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4638, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=8372, PETRI_PLACES=217, PETRI_TRANSITIONS=479} [2024-11-28 03:59:07,151 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 194 predicate places. [2024-11-28 03:59:07,151 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 479 transitions, 8372 flow [2024-11-28 03:59:07,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 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) [2024-11-28 03:59:07,152 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:07,152 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:07,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:59:07,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:07,353 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:59:07,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:07,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2057945510, now seen corresponding path program 7 times [2024-11-28 03:59:07,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:07,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471202723] [2024-11-28 03:59:07,353 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:59:07,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:07,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:07,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471202723] [2024-11-28 03:59:07,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471202723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:07,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68397715] [2024-11-28 03:59:07,514 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:59:07,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:07,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:07,516 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:07,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:59:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:07,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:59:07,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:07,724 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:07,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68397715] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:59:07,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:59:07,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2024-11-28 03:59:07,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699642353] [2024-11-28 03:59:07,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:59:07,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:59:07,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:07,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:59:07,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:59:07,870 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 03:59:07,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 479 transitions, 8372 flow. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 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) [2024-11-28 03:59:07,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:07,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 03:59:07,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:10,585 INFO L124 PetriNetUnfolderBase]: 3156/5324 cut-off events. [2024-11-28 03:59:10,585 INFO L125 PetriNetUnfolderBase]: For 193192/193192 co-relation queries the response was YES. [2024-11-28 03:59:10,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48083 conditions, 5324 events. 3156/5324 cut-off events. For 193192/193192 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 31034 event pairs, 25 based on Foata normal form. 148/5472 useless extension candidates. Maximal degree in co-relation 47065. Up to 1031 conditions per place. [2024-11-28 03:59:10,796 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 386 selfloop transitions, 704 changer transitions 5/1096 dead transitions. [2024-11-28 03:59:10,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 1096 transitions, 20886 flow [2024-11-28 03:59:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-28 03:59:10,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-11-28 03:59:10,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 385 transitions. [2024-11-28 03:59:10,799 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39855072463768115 [2024-11-28 03:59:10,799 INFO L175 Difference]: Start difference. First operand has 217 places, 479 transitions, 8372 flow. Second operand 46 states and 385 transitions. [2024-11-28 03:59:10,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 1096 transitions, 20886 flow [2024-11-28 03:59:11,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 1096 transitions, 20009 flow, removed 347 selfloop flow, removed 9 redundant places. [2024-11-28 03:59:11,964 INFO L231 Difference]: Finished difference. Result has 277 places, 865 transitions, 17411 flow [2024-11-28 03:59:11,965 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7603, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=17411, PETRI_PLACES=277, PETRI_TRANSITIONS=865} [2024-11-28 03:59:11,965 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 254 predicate places. [2024-11-28 03:59:11,965 INFO L471 AbstractCegarLoop]: Abstraction has has 277 places, 865 transitions, 17411 flow [2024-11-28 03:59:11,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 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) [2024-11-28 03:59:11,966 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:11,966 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:11,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:59:12,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:12,166 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:59:12,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:12,167 INFO L85 PathProgramCache]: Analyzing trace with hash 820682530, now seen corresponding path program 8 times [2024-11-28 03:59:12,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:12,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741473237] [2024-11-28 03:59:12,167 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:59:12,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:12,179 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:59:12,180 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:12,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:12,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741473237] [2024-11-28 03:59:12,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741473237] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:12,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686960037] [2024-11-28 03:59:12,352 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:59:12,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:12,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:12,354 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:12,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:59:12,406 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:59:12,406 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:12,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:59:12,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:12,525 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:12,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686960037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:59:12,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:59:12,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2024-11-28 03:59:12,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408908758] [2024-11-28 03:59:12,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:59:12,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:59:12,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:12,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:59:12,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:59:12,681 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 03:59:12,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 865 transitions, 17411 flow. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 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) [2024-11-28 03:59:12,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:12,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 03:59:12,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:16,469 INFO L124 PetriNetUnfolderBase]: 4418/7337 cut-off events. [2024-11-28 03:59:16,469 INFO L125 PetriNetUnfolderBase]: For 298832/298832 co-relation queries the response was YES. [2024-11-28 03:59:16,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75818 conditions, 7337 events. 4418/7337 cut-off events. For 298832/298832 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 44879 event pairs, 132 based on Foata normal form. 36/7373 useless extension candidates. Maximal degree in co-relation 74325. Up to 1347 conditions per place. [2024-11-28 03:59:16,556 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 321 selfloop transitions, 1192 changer transitions 5/1519 dead transitions. [2024-11-28 03:59:16,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 1519 transitions, 34654 flow [2024-11-28 03:59:16,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 03:59:16,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-11-28 03:59:16,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 362 transitions. [2024-11-28 03:59:16,559 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-11-28 03:59:16,559 INFO L175 Difference]: Start difference. First operand has 277 places, 865 transitions, 17411 flow. Second operand 44 states and 362 transitions. [2024-11-28 03:59:16,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 1519 transitions, 34654 flow [2024-11-28 03:59:19,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1519 transitions, 33061 flow, removed 724 selfloop flow, removed 8 redundant places. [2024-11-28 03:59:19,156 INFO L231 Difference]: Finished difference. Result has 332 places, 1370 transitions, 31834 flow [2024-11-28 03:59:19,157 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=16832, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=722, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=31834, PETRI_PLACES=332, PETRI_TRANSITIONS=1370} [2024-11-28 03:59:19,158 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 309 predicate places. [2024-11-28 03:59:19,158 INFO L471 AbstractCegarLoop]: Abstraction has has 332 places, 1370 transitions, 31834 flow [2024-11-28 03:59:19,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 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) [2024-11-28 03:59:19,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:19,158 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:19,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 03:59:19,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 03:59:19,359 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:59:19,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:19,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1632791624, now seen corresponding path program 9 times [2024-11-28 03:59:19,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:19,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645492214] [2024-11-28 03:59:19,360 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:59:19,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:19,368 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:59:19,368 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:19,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:19,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645492214] [2024-11-28 03:59:19,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645492214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:19,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873445686] [2024-11-28 03:59:19,478 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:59:19,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:19,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:19,480 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:19,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:59:19,530 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:59:19,530 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:19,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:59:19,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:19,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:19,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873445686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:59:19,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:59:19,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2024-11-28 03:59:19,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570982070] [2024-11-28 03:59:19,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:59:19,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:59:19,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:19,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:59:19,766 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:59:19,788 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 03:59:19,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 1370 transitions, 31834 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 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) [2024-11-28 03:59:19,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:19,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 03:59:19,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:25,127 INFO L124 PetriNetUnfolderBase]: 5014/8337 cut-off events. [2024-11-28 03:59:25,127 INFO L125 PetriNetUnfolderBase]: For 415659/415659 co-relation queries the response was YES. [2024-11-28 03:59:25,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94252 conditions, 8337 events. 5014/8337 cut-off events. For 415659/415659 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 51936 event pairs, 109 based on Foata normal form. 70/8407 useless extension candidates. Maximal degree in co-relation 94033. Up to 1520 conditions per place. [2024-11-28 03:59:25,249 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 345 selfloop transitions, 1333 changer transitions 3/1682 dead transitions. [2024-11-28 03:59:25,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1682 transitions, 42176 flow [2024-11-28 03:59:25,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-28 03:59:25,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-11-28 03:59:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 342 transitions. [2024-11-28 03:59:25,256 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-11-28 03:59:25,256 INFO L175 Difference]: Start difference. First operand has 332 places, 1370 transitions, 31834 flow. Second operand 41 states and 342 transitions. [2024-11-28 03:59:25,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1682 transitions, 42176 flow [2024-11-28 03:59:29,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1682 transitions, 40144 flow, removed 951 selfloop flow, removed 8 redundant places. [2024-11-28 03:59:30,041 INFO L231 Difference]: Finished difference. Result has 375 places, 1560 transitions, 39317 flow [2024-11-28 03:59:30,042 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=30005, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=39317, PETRI_PLACES=375, PETRI_TRANSITIONS=1560} [2024-11-28 03:59:30,042 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 352 predicate places. [2024-11-28 03:59:30,043 INFO L471 AbstractCegarLoop]: Abstraction has has 375 places, 1560 transitions, 39317 flow [2024-11-28 03:59:30,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 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) [2024-11-28 03:59:30,043 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:30,043 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:30,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:59:30,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 03:59:30,243 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:59:30,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:30,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1772095420, now seen corresponding path program 10 times [2024-11-28 03:59:30,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:30,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868458892] [2024-11-28 03:59:30,244 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:59:30,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:30,251 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:59:30,251 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:30,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:30,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868458892] [2024-11-28 03:59:30,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868458892] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:30,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73478338] [2024-11-28 03:59:30,329 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:59:30,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:30,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:30,332 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:30,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:59:30,377 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:59:30,377 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:30,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:59:30,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:30,453 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:30,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73478338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:59:30,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:59:30,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-28 03:59:30,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253699091] [2024-11-28 03:59:30,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:59:30,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:59:30,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:30,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:59:30,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:59:30,505 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 03:59:30,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 1560 transitions, 39317 flow. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 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) [2024-11-28 03:59:30,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:30,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 03:59:30,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:36,011 INFO L124 PetriNetUnfolderBase]: 5423/9051 cut-off events. [2024-11-28 03:59:36,011 INFO L125 PetriNetUnfolderBase]: For 479548/479548 co-relation queries the response was YES. [2024-11-28 03:59:36,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105057 conditions, 9051 events. 5423/9051 cut-off events. For 479548/479548 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 57855 event pairs, 854 based on Foata normal form. 88/9139 useless extension candidates. Maximal degree in co-relation 104462. Up to 4451 conditions per place. [2024-11-28 03:59:36,142 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 919 selfloop transitions, 900 changer transitions 3/1823 dead transitions. [2024-11-28 03:59:36,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1823 transitions, 48824 flow [2024-11-28 03:59:36,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 03:59:36,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-28 03:59:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 194 transitions. [2024-11-28 03:59:36,143 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-11-28 03:59:36,143 INFO L175 Difference]: Start difference. First operand has 375 places, 1560 transitions, 39317 flow. Second operand 20 states and 194 transitions. [2024-11-28 03:59:36,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1823 transitions, 48824 flow [2024-11-28 03:59:43,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1823 transitions, 48218 flow, removed 209 selfloop flow, removed 14 redundant places. [2024-11-28 03:59:43,684 INFO L231 Difference]: Finished difference. Result has 394 places, 1669 transitions, 45442 flow [2024-11-28 03:59:43,685 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=38731, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=799, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=741, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=45442, PETRI_PLACES=394, PETRI_TRANSITIONS=1669} [2024-11-28 03:59:43,686 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 371 predicate places. [2024-11-28 03:59:43,686 INFO L471 AbstractCegarLoop]: Abstraction has has 394 places, 1669 transitions, 45442 flow [2024-11-28 03:59:43,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 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) [2024-11-28 03:59:43,686 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:43,686 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:43,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 03:59:43,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 03:59:43,887 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:59:43,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:43,887 INFO L85 PathProgramCache]: Analyzing trace with hash -788823274, now seen corresponding path program 11 times [2024-11-28 03:59:43,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:43,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479855666] [2024-11-28 03:59:43,888 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:59:43,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:43,897 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:59:43,897 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:44,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:44,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479855666] [2024-11-28 03:59:44,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479855666] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:59:44,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:59:44,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 03:59:44,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991132621] [2024-11-28 03:59:44,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:59:44,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:59:44,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:44,032 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:59:44,032 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:59:44,047 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 03:59:44,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1669 transitions, 45442 flow. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 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) [2024-11-28 03:59:44,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:44,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 03:59:44,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:59:50,123 INFO L124 PetriNetUnfolderBase]: 5654/9414 cut-off events. [2024-11-28 03:59:50,124 INFO L125 PetriNetUnfolderBase]: For 607415/607415 co-relation queries the response was YES. [2024-11-28 03:59:50,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117214 conditions, 9414 events. 5654/9414 cut-off events. For 607415/607415 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 60348 event pairs, 252 based on Foata normal form. 10/9424 useless extension candidates. Maximal degree in co-relation 116619. Up to 8546 conditions per place. [2024-11-28 03:59:50,273 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 1655 selfloop transitions, 122 changer transitions 7/1785 dead transitions. [2024-11-28 03:59:50,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 1785 transitions, 52057 flow [2024-11-28 03:59:50,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:59:50,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:59:50,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-11-28 03:59:50,274 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-11-28 03:59:50,274 INFO L175 Difference]: Start difference. First operand has 394 places, 1669 transitions, 45442 flow. Second operand 9 states and 84 transitions. [2024-11-28 03:59:50,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 1785 transitions, 52057 flow [2024-11-28 03:59:58,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 1785 transitions, 51120 flow, removed 347 selfloop flow, removed 2 redundant places. [2024-11-28 03:59:58,954 INFO L231 Difference]: Finished difference. Result has 403 places, 1712 transitions, 46398 flow [2024-11-28 03:59:58,955 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=44676, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=46398, PETRI_PLACES=403, PETRI_TRANSITIONS=1712} [2024-11-28 03:59:58,956 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 380 predicate places. [2024-11-28 03:59:58,956 INFO L471 AbstractCegarLoop]: Abstraction has has 403 places, 1712 transitions, 46398 flow [2024-11-28 03:59:58,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 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) [2024-11-28 03:59:58,957 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:59:58,957 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:58,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 03:59:58,957 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 03:59:58,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:58,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1340145536, now seen corresponding path program 12 times [2024-11-28 03:59:58,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:59:58,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147862432] [2024-11-28 03:59:58,958 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:59:58,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:59:58,968 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:59:58,968 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:59,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:59:59,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147862432] [2024-11-28 03:59:59,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147862432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:59,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532046318] [2024-11-28 03:59:59,087 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:59:59,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:59,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:59,089 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:59,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:59:59,140 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:59:59,140 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:59:59,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:59:59,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:59:59,269 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:59:59,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532046318] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:59,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:59:59,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 19 [2024-11-28 03:59:59,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335760566] [2024-11-28 03:59:59,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:59:59,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:59:59,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:59:59,388 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:59:59,388 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:59:59,397 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 03:59:59,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 1712 transitions, 46398 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:59:59,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:59:59,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 03:59:59,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:00:05,421 INFO L124 PetriNetUnfolderBase]: 5741/9535 cut-off events. [2024-11-28 04:00:05,421 INFO L125 PetriNetUnfolderBase]: For 582158/582158 co-relation queries the response was YES. [2024-11-28 04:00:05,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116412 conditions, 9535 events. 5741/9535 cut-off events. For 582158/582158 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 61351 event pairs, 1804 based on Foata normal form. 6/9541 useless extension candidates. Maximal degree in co-relation 115814. Up to 8604 conditions per place. [2024-11-28 04:00:05,744 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 1647 selfloop transitions, 140 changer transitions 7/1795 dead transitions. [2024-11-28 04:00:05,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1795 transitions, 52204 flow [2024-11-28 04:00:05,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:00:05,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 04:00:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 79 transitions. [2024-11-28 04:00:05,745 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-11-28 04:00:05,745 INFO L175 Difference]: Start difference. First operand has 403 places, 1712 transitions, 46398 flow. Second operand 8 states and 79 transitions. [2024-11-28 04:00:05,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1795 transitions, 52204 flow [2024-11-28 04:00:13,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1795 transitions, 52095 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-11-28 04:00:13,761 INFO L231 Difference]: Finished difference. Result has 412 places, 1755 transitions, 47980 flow [2024-11-28 04:00:13,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=46254, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=47980, PETRI_PLACES=412, PETRI_TRANSITIONS=1755} [2024-11-28 04:00:13,763 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 389 predicate places. [2024-11-28 04:00:13,763 INFO L471 AbstractCegarLoop]: Abstraction has has 412 places, 1755 transitions, 47980 flow [2024-11-28 04:00:13,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:00:13,763 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:00:13,763 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:00:13,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 04:00:13,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 04:00:13,964 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:00:13,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:00:13,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1092157842, now seen corresponding path program 13 times [2024-11-28 04:00:13,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:00:13,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000513380] [2024-11-28 04:00:13,964 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:00:13,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:00:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:00:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:00:14,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:00:14,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000513380] [2024-11-28 04:00:14,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000513380] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:00:14,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770597035] [2024-11-28 04:00:14,107 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:00:14,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:00:14,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:00:14,109 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:00:14,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:00:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:00:14,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:00:14,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:00:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:00:14,271 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:00:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:00:14,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770597035] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:00:14,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:00:14,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-11-28 04:00:14,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430634282] [2024-11-28 04:00:14,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:00:14,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 04:00:14,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:00:14,373 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 04:00:14,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:00:14,383 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 04:00:14,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1755 transitions, 47980 flow. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 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) [2024-11-28 04:00:14,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:00:14,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 04:00:14,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:00:21,253 INFO L124 PetriNetUnfolderBase]: 6086/10140 cut-off events. [2024-11-28 04:00:21,254 INFO L125 PetriNetUnfolderBase]: For 651846/651846 co-relation queries the response was YES. [2024-11-28 04:00:21,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126456 conditions, 10140 events. 6086/10140 cut-off events. For 651846/651846 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 66067 event pairs, 79 based on Foata normal form. 62/10202 useless extension candidates. Maximal degree in co-relation 125853. Up to 4363 conditions per place. [2024-11-28 04:00:21,405 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 967 selfloop transitions, 1035 changer transitions 1/2004 dead transitions. [2024-11-28 04:00:21,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 2004 transitions, 57628 flow [2024-11-28 04:00:21,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 04:00:21,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-28 04:00:21,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 215 transitions. [2024-11-28 04:00:21,407 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-11-28 04:00:21,407 INFO L175 Difference]: Start difference. First operand has 412 places, 1755 transitions, 47980 flow. Second operand 25 states and 215 transitions. [2024-11-28 04:00:21,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 2004 transitions, 57628 flow [2024-11-28 04:00:30,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 2004 transitions, 57454 flow, removed 64 selfloop flow, removed 1 redundant places. [2024-11-28 04:00:30,524 INFO L231 Difference]: Finished difference. Result has 448 places, 1834 transitions, 54203 flow [2024-11-28 04:00:30,525 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=47619, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=962, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=54203, PETRI_PLACES=448, PETRI_TRANSITIONS=1834} [2024-11-28 04:00:30,525 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 425 predicate places. [2024-11-28 04:00:30,525 INFO L471 AbstractCegarLoop]: Abstraction has has 448 places, 1834 transitions, 54203 flow [2024-11-28 04:00:30,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 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) [2024-11-28 04:00:30,525 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:00:30,525 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:00:30,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 04:00:30,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 04:00:30,726 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:00:30,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:00:30,727 INFO L85 PathProgramCache]: Analyzing trace with hash -212740450, now seen corresponding path program 14 times [2024-11-28 04:00:30,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:00:30,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93195284] [2024-11-28 04:00:30,727 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:00:30,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:00:30,734 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:00:30,734 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:00:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:00:30,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:00:30,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93195284] [2024-11-28 04:00:30,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93195284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:00:30,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301851351] [2024-11-28 04:00:30,829 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:00:30,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:00:30,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:00:30,832 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:00:30,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:00:30,878 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:00:30,878 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:00:30,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:00:30,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:00:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:00:31,029 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:00:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:00:31,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301851351] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:00:31,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:00:31,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 19 [2024-11-28 04:00:31,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573477724] [2024-11-28 04:00:31,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:00:31,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:00:31,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:00:31,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:00:31,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:00:31,132 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-28 04:00:31,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 1834 transitions, 54203 flow. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:00:31,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:00:31,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-28 04:00:31,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:00:38,525 INFO L124 PetriNetUnfolderBase]: 6630/11008 cut-off events. [2024-11-28 04:00:38,525 INFO L125 PetriNetUnfolderBase]: For 843963/843963 co-relation queries the response was YES. [2024-11-28 04:00:38,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147945 conditions, 11008 events. 6630/11008 cut-off events. For 843963/843963 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 72912 event pairs, 1872 based on Foata normal form. 12/11020 useless extension candidates. Maximal degree in co-relation 147324. Up to 9011 conditions per place. [2024-11-28 04:00:38,772 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 1730 selfloop transitions, 265 changer transitions 5/2001 dead transitions. [2024-11-28 04:00:38,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 2001 transitions, 63360 flow [2024-11-28 04:00:38,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:00:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 04:00:38,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2024-11-28 04:00:38,773 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-11-28 04:00:38,773 INFO L175 Difference]: Start difference. First operand has 448 places, 1834 transitions, 54203 flow. Second operand 7 states and 73 transitions. [2024-11-28 04:00:38,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 2001 transitions, 63360 flow [2024-11-28 04:00:49,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 2001 transitions, 62816 flow, removed 199 selfloop flow, removed 10 redundant places. [2024-11-28 04:00:49,119 INFO L231 Difference]: Finished difference. Result has 447 places, 1919 transitions, 57680 flow [2024-11-28 04:00:49,120 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=53853, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=57680, PETRI_PLACES=447, PETRI_TRANSITIONS=1919} [2024-11-28 04:00:49,120 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 424 predicate places. [2024-11-28 04:00:49,120 INFO L471 AbstractCegarLoop]: Abstraction has has 447 places, 1919 transitions, 57680 flow [2024-11-28 04:00:49,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:00:49,120 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:00:49,120 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:00:49,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 04:00:49,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 04:00:49,324 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:00:49,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:00:49,325 INFO L85 PathProgramCache]: Analyzing trace with hash 2117628698, now seen corresponding path program 15 times [2024-11-28 04:00:49,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:00:49,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450231164] [2024-11-28 04:00:49,325 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:00:49,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:00:49,333 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:00:49,333 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:00:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:00:49,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:00:49,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450231164] [2024-11-28 04:00:49,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450231164] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:00:49,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334742542] [2024-11-28 04:00:49,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:00:49,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:00:49,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:00:49,410 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:00:49,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e592b62-0bbf-4e50-afb5-9489071580c7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:00:49,461 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:00:49,462 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:00:49,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:00:49,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:00:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:00:49,507 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:00:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:00:49,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334742542] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:00:49,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:00:49,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 8 [2024-11-28 04:00:49,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825735768] [2024-11-28 04:00:49,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:00:49,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:00:49,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:00:49,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:00:49,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:00:49,746 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-28 04:00:49,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 1919 transitions, 57680 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:00:49,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:00:49,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-28 04:00:49,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand