./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd --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 74892b4fb04a6fe0e809c110df08d9da57c5c90ea65da5b04a32432686fc90f8 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 13:49:01,138 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 13:49:01,226 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 13:49:01,234 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 13:49:01,234 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 13:49:01,275 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 13:49:01,276 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 13:49:01,276 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 13:49:01,277 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 13:49:01,277 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 13:49:01,277 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 13:49:01,277 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 13:49:01,278 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 13:49:01,278 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 13:49:01,279 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 13:49:01,279 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 13:49:01,279 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 13:49:01,279 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 13:49:01,280 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 13:49:01,280 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 13:49:01,280 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 13:49:01,280 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 13:49:01,280 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 13:49:01,281 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 13:49:01,281 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 13:49:01,281 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 13:49:01,281 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 13:49:01,281 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 13:49:01,282 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 13:49:01,282 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 13:49:01,282 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 13:49:01,282 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 13:49:01,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:49:01,282 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 13:49:01,283 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 13:49:01,283 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 13:49:01,283 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 13:49:01,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 13:49:01,283 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 13:49:01,284 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 13:49:01,284 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 13:49:01,284 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 13:49:01,284 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_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd 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 -> 74892b4fb04a6fe0e809c110df08d9da57c5c90ea65da5b04a32432686fc90f8 [2024-11-13 13:49:01,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 13:49:01,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 13:49:01,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 13:49:01,628 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 13:49:01,629 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 13:49:01,630 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c Unable to find full path for "g++" [2024-11-13 13:49:03,529 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 13:49:03,810 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 13:49:03,810 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2024-11-13 13:49:03,821 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/data/8a14915be/09ac675c9f214a2c8aa4143d2731956f/FLAG5809057c5 [2024-11-13 13:49:03,837 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/data/8a14915be/09ac675c9f214a2c8aa4143d2731956f [2024-11-13 13:49:03,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 13:49:03,842 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 13:49:03,843 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 13:49:03,844 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 13:49:03,848 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 13:49:03,849 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:49:03" (1/1) ... [2024-11-13 13:49:03,850 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7674c1d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:49:03, skipping insertion in model container [2024-11-13 13:49:03,850 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:49:03" (1/1) ... [2024-11-13 13:49:03,868 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 13:49:04,073 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_aa421b00-1755-4332-a338-9ff0bc752228/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c[2247,2260] [2024-11-13 13:49:04,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:49:04,090 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 13:49:04,114 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_aa421b00-1755-4332-a338-9ff0bc752228/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c[2247,2260] [2024-11-13 13:49:04,118 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:49:04,139 INFO L204 MainTranslator]: Completed translation [2024-11-13 13:49:04,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:49:04 WrapperNode [2024-11-13 13:49:04,140 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 13:49:04,141 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 13:49:04,141 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 13:49:04,141 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 13:49:04,148 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:49:04" (1/1) ... [2024-11-13 13:49:04,157 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:49:04" (1/1) ... [2024-11-13 13:49:04,184 INFO L138 Inliner]: procedures = 20, calls = 13, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 97 [2024-11-13 13:49:04,185 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 13:49:04,185 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 13:49:04,187 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 13:49:04,187 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 13:49:04,196 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:49:04" (1/1) ... [2024-11-13 13:49:04,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:49:04" (1/1) ... [2024-11-13 13:49:04,198 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:49:04" (1/1) ... [2024-11-13 13:49:04,219 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]. [2024-11-13 13:49:04,223 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:49:04" (1/1) ... [2024-11-13 13:49:04,223 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:49:04" (1/1) ... [2024-11-13 13:49:04,228 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:49:04" (1/1) ... [2024-11-13 13:49:04,235 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:49:04" (1/1) ... [2024-11-13 13:49:04,236 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:49:04" (1/1) ... [2024-11-13 13:49:04,239 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:49:04" (1/1) ... [2024-11-13 13:49:04,242 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 13:49:04,245 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 13:49:04,245 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 13:49:04,246 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 13:49:04,247 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:49:04" (1/1) ... [2024-11-13 13:49:04,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:49:04,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:49:04,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 13:49:04,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 13:49:04,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 13:49:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 13:49:04,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 13:49:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 13:49:04,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 13:49:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-13 13:49:04,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-13 13:49:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-13 13:49:04,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-13 13:49:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 13:49:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 13:49:04,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 13:49:04,319 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 13:49:04,442 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 13:49:04,444 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 13:49:04,747 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 13:49:04,747 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 13:49:04,929 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 13:49:04,929 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-13 13:49:04,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:49:04 BoogieIcfgContainer [2024-11-13 13:49:04,930 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 13:49:04,932 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 13:49:04,932 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 13:49:04,937 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 13:49:04,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:49:03" (1/3) ... [2024-11-13 13:49:04,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4b9302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:49:04, skipping insertion in model container [2024-11-13 13:49:04,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:49:04" (2/3) ... [2024-11-13 13:49:04,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4b9302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:49:04, skipping insertion in model container [2024-11-13 13:49:04,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:49:04" (3/3) ... [2024-11-13 13:49:04,939 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2024-11-13 13:49:04,954 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 13:49:04,956 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-difference-det.wvr.c that has 5 procedures, 37 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-13 13:49:04,956 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 13:49:05,018 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-13 13:49:05,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 40 transitions, 108 flow [2024-11-13 13:49:05,090 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2024-11-13 13:49:05,095 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-13 13:49:05,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 36 events. 4/36 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 53 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-11-13 13:49:05,099 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 40 transitions, 108 flow [2024-11-13 13:49:05,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 35 transitions, 94 flow [2024-11-13 13:49:05,110 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 13:49:05,129 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;@1b995586, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 13:49:05,130 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-13 13:49:05,151 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 13:49:05,151 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2024-11-13 13:49:05,151 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-13 13:49:05,151 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:05,152 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:05,152 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-13 13:49:05,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:05,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1001100828, now seen corresponding path program 1 times [2024-11-13 13:49:05,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:05,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687773125] [2024-11-13 13:49:05,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:05,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:05,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:05,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687773125] [2024-11-13 13:49:05,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687773125] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:49:05,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:49:05,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:49:05,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743288156] [2024-11-13 13:49:05,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:49:05,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:49:05,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:05,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:49:05,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:49:05,681 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-13 13:49:05,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:05,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:05,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-13 13:49:05,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:49:06,628 INFO L124 PetriNetUnfolderBase]: 4206/5690 cut-off events. [2024-11-13 13:49:06,628 INFO L125 PetriNetUnfolderBase]: For 473/473 co-relation queries the response was YES. [2024-11-13 13:49:06,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11678 conditions, 5690 events. 4206/5690 cut-off events. For 473/473 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 24102 event pairs, 1080 based on Foata normal form. 1/5300 useless extension candidates. Maximal degree in co-relation 10315. Up to 4714 conditions per place. [2024-11-13 13:49:06,683 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 48 selfloop transitions, 3 changer transitions 2/56 dead transitions. [2024-11-13 13:49:06,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 56 transitions, 263 flow [2024-11-13 13:49:06,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:49:06,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 13:49:06,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-13 13:49:06,702 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-11-13 13:49:06,704 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 94 flow. Second operand 3 states and 77 transitions. [2024-11-13 13:49:06,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 56 transitions, 263 flow [2024-11-13 13:49:06,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 233 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-13 13:49:06,724 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 101 flow [2024-11-13 13:49:06,726 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-13 13:49:06,733 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2024-11-13 13:49:06,733 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 101 flow [2024-11-13 13:49:06,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:06,733 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:06,734 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:06,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 13:49:06,735 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-13 13:49:06,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:06,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1912034930, now seen corresponding path program 1 times [2024-11-13 13:49:06,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:06,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446175203] [2024-11-13 13:49:06,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:06,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:06,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:06,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446175203] [2024-11-13 13:49:06,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446175203] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:49:06,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:49:06,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 13:49:06,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781633128] [2024-11-13 13:49:06,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:49:06,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:49:06,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:07,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:49:07,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:49:07,006 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2024-11-13 13:49:07,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:07,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:07,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2024-11-13 13:49:07,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:49:08,516 INFO L124 PetriNetUnfolderBase]: 8890/11757 cut-off events. [2024-11-13 13:49:08,516 INFO L125 PetriNetUnfolderBase]: For 1383/1408 co-relation queries the response was YES. [2024-11-13 13:49:08,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26035 conditions, 11757 events. 8890/11757 cut-off events. For 1383/1408 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 55838 event pairs, 2934 based on Foata normal form. 0/11130 useless extension candidates. Maximal degree in co-relation 3736. Up to 6812 conditions per place. [2024-11-13 13:49:08,698 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 89 selfloop transitions, 9 changer transitions 1/101 dead transitions. [2024-11-13 13:49:08,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 101 transitions, 464 flow [2024-11-13 13:49:08,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:49:08,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:49:08,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-11-13 13:49:08,702 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-13 13:49:08,703 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 101 flow. Second operand 5 states and 125 transitions. [2024-11-13 13:49:08,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 101 transitions, 464 flow [2024-11-13 13:49:08,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 101 transitions, 457 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:49:08,707 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 156 flow [2024-11-13 13:49:08,707 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2024-11-13 13:49:08,708 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2024-11-13 13:49:08,708 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 156 flow [2024-11-13 13:49:08,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:08,708 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:08,709 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:08,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 13:49:08,711 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-13 13:49:08,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:08,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1169581546, now seen corresponding path program 2 times [2024-11-13 13:49:08,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:08,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27718514] [2024-11-13 13:49:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:08,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:08,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:08,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27718514] [2024-11-13 13:49:08,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27718514] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:49:08,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191966508] [2024-11-13 13:49:08,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:49:08,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:49:08,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:49:08,870 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:49:08,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 13:49:08,994 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:49:08,994 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:49:08,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 13:49:09,001 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:49:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:09,105 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:49:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:09,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191966508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:49:09,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:49:09,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-13 13:49:09,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176733463] [2024-11-13 13:49:09,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:49:09,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 13:49:09,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:09,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 13:49:09,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-13 13:49:09,193 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 40 [2024-11-13 13:49:09,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 156 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:09,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:09,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 40 [2024-11-13 13:49:09,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:49:11,707 INFO L124 PetriNetUnfolderBase]: 15902/20779 cut-off events. [2024-11-13 13:49:11,708 INFO L125 PetriNetUnfolderBase]: For 6700/6700 co-relation queries the response was YES. [2024-11-13 13:49:11,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53356 conditions, 20779 events. 15902/20779 cut-off events. For 6700/6700 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 100699 event pairs, 1195 based on Foata normal form. 354/21133 useless extension candidates. Maximal degree in co-relation 27004. Up to 3779 conditions per place. [2024-11-13 13:49:11,842 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 245 selfloop transitions, 35 changer transitions 1/282 dead transitions. [2024-11-13 13:49:11,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 282 transitions, 1380 flow [2024-11-13 13:49:11,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 13:49:11,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 13:49:11,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 338 transitions. [2024-11-13 13:49:11,845 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-11-13 13:49:11,845 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 156 flow. Second operand 14 states and 338 transitions. [2024-11-13 13:49:11,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 282 transitions, 1380 flow [2024-11-13 13:49:11,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 282 transitions, 1380 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-13 13:49:11,862 INFO L231 Difference]: Finished difference. Result has 64 places, 73 transitions, 389 flow [2024-11-13 13:49:11,862 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=389, PETRI_PLACES=64, PETRI_TRANSITIONS=73} [2024-11-13 13:49:11,863 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-11-13 13:49:11,863 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 73 transitions, 389 flow [2024-11-13 13:49:11,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:11,863 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:11,864 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:11,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-13 13:49:12,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:49:12,070 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-13 13:49:12,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:12,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1689147106, now seen corresponding path program 1 times [2024-11-13 13:49:12,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:12,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598852996] [2024-11-13 13:49:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:12,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:12,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:12,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598852996] [2024-11-13 13:49:12,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598852996] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:49:12,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:49:12,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 13:49:12,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536755914] [2024-11-13 13:49:12,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:49:12,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:49:12,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:12,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:49:12,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:49:12,280 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2024-11-13 13:49:12,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 73 transitions, 389 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:12,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:12,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2024-11-13 13:49:12,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:49:13,751 INFO L124 PetriNetUnfolderBase]: 13851/18340 cut-off events. [2024-11-13 13:49:13,751 INFO L125 PetriNetUnfolderBase]: For 21244/21244 co-relation queries the response was YES. [2024-11-13 13:49:13,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55514 conditions, 18340 events. 13851/18340 cut-off events. For 21244/21244 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 91058 event pairs, 4183 based on Foata normal form. 36/18373 useless extension candidates. Maximal degree in co-relation 49455. Up to 9229 conditions per place. [2024-11-13 13:49:13,872 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 101 selfloop transitions, 12 changer transitions 15/132 dead transitions. [2024-11-13 13:49:13,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 132 transitions, 824 flow [2024-11-13 13:49:13,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:49:13,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:49:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-11-13 13:49:13,874 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-11-13 13:49:13,874 INFO L175 Difference]: Start difference. First operand has 64 places, 73 transitions, 389 flow. Second operand 5 states and 126 transitions. [2024-11-13 13:49:13,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 132 transitions, 824 flow [2024-11-13 13:49:14,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 132 transitions, 791 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-11-13 13:49:14,323 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 394 flow [2024-11-13 13:49:14,324 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=394, PETRI_PLACES=69, PETRI_TRANSITIONS=73} [2024-11-13 13:49:14,324 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-11-13 13:49:14,325 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 394 flow [2024-11-13 13:49:14,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:14,325 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:14,325 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:14,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 13:49:14,326 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-13 13:49:14,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:14,326 INFO L85 PathProgramCache]: Analyzing trace with hash 32533982, now seen corresponding path program 3 times [2024-11-13 13:49:14,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:14,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75884698] [2024-11-13 13:49:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:14,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:14,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:14,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75884698] [2024-11-13 13:49:14,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75884698] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:49:14,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878514082] [2024-11-13 13:49:14,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:49:14,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:49:14,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:49:14,607 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:49:14,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 13:49:14,708 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 13:49:14,709 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:49:14,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 13:49:14,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:49:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:14,795 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:49:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:14,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878514082] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:49:14,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:49:14,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-13 13:49:14,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024131658] [2024-11-13 13:49:14,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:49:14,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 13:49:14,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:14,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 13:49:14,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-13 13:49:14,851 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 40 [2024-11-13 13:49:14,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 73 transitions, 394 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 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) [2024-11-13 13:49:14,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:14,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 40 [2024-11-13 13:49:14,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:49:17,184 INFO L124 PetriNetUnfolderBase]: 22518/29285 cut-off events. [2024-11-13 13:49:17,184 INFO L125 PetriNetUnfolderBase]: For 42913/42913 co-relation queries the response was YES. [2024-11-13 13:49:17,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88459 conditions, 29285 events. 22518/29285 cut-off events. For 42913/42913 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 140675 event pairs, 4743 based on Foata normal form. 438/29723 useless extension candidates. Maximal degree in co-relation 72610. Up to 9338 conditions per place. [2024-11-13 13:49:17,335 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 156 selfloop transitions, 46 changer transitions 0/203 dead transitions. [2024-11-13 13:49:17,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 203 transitions, 1291 flow [2024-11-13 13:49:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 13:49:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-13 13:49:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-11-13 13:49:17,337 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-11-13 13:49:17,337 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 394 flow. Second operand 8 states and 193 transitions. [2024-11-13 13:49:17,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 203 transitions, 1291 flow [2024-11-13 13:49:17,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 203 transitions, 1250 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-13 13:49:17,876 INFO L231 Difference]: Finished difference. Result has 77 places, 98 transitions, 686 flow [2024-11-13 13:49:17,877 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=686, PETRI_PLACES=77, PETRI_TRANSITIONS=98} [2024-11-13 13:49:17,877 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-11-13 13:49:17,877 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 98 transitions, 686 flow [2024-11-13 13:49:17,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 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) [2024-11-13 13:49:17,878 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:17,878 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:17,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 13:49:18,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:49:18,078 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-13 13:49:18,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:18,079 INFO L85 PathProgramCache]: Analyzing trace with hash 292663130, now seen corresponding path program 4 times [2024-11-13 13:49:18,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:18,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261128727] [2024-11-13 13:49:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:18,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:18,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:18,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261128727] [2024-11-13 13:49:18,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261128727] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:49:18,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:49:18,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 13:49:18,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346239972] [2024-11-13 13:49:18,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:49:18,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:49:18,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:18,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:49:18,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:49:18,192 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2024-11-13 13:49:18,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 98 transitions, 686 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:18,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:18,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2024-11-13 13:49:18,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:49:20,381 INFO L124 PetriNetUnfolderBase]: 21351/28348 cut-off events. [2024-11-13 13:49:20,381 INFO L125 PetriNetUnfolderBase]: For 52148/52301 co-relation queries the response was YES. [2024-11-13 13:49:20,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92620 conditions, 28348 events. 21351/28348 cut-off events. For 52148/52301 co-relation queries the response was YES. Maximal size of possible extension queue 1058. Compared 147316 event pairs, 7442 based on Foata normal form. 73/28319 useless extension candidates. Maximal degree in co-relation 72953. Up to 13272 conditions per place. [2024-11-13 13:49:20,556 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 110 selfloop transitions, 19 changer transitions 10/157 dead transitions. [2024-11-13 13:49:20,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 157 transitions, 1196 flow [2024-11-13 13:49:20,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:49:20,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:49:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-11-13 13:49:20,558 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-11-13 13:49:20,558 INFO L175 Difference]: Start difference. First operand has 77 places, 98 transitions, 686 flow. Second operand 5 states and 118 transitions. [2024-11-13 13:49:20,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 157 transitions, 1196 flow [2024-11-13 13:49:21,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 157 transitions, 1174 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-11-13 13:49:21,136 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 711 flow [2024-11-13 13:49:21,136 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=711, PETRI_PLACES=83, PETRI_TRANSITIONS=98} [2024-11-13 13:49:21,136 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-11-13 13:49:21,137 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 711 flow [2024-11-13 13:49:21,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:21,137 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:21,137 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:21,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 13:49:21,137 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-13 13:49:21,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:21,137 INFO L85 PathProgramCache]: Analyzing trace with hash -617788806, now seen corresponding path program 2 times [2024-11-13 13:49:21,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:21,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322304433] [2024-11-13 13:49:21,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:21,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:21,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:21,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322304433] [2024-11-13 13:49:21,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322304433] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:49:21,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:49:21,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 13:49:21,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359448597] [2024-11-13 13:49:21,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:49:21,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 13:49:21,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:21,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 13:49:21,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-13 13:49:21,237 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2024-11-13 13:49:21,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 98 transitions, 711 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:21,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:21,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2024-11-13 13:49:21,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:49:23,634 INFO L124 PetriNetUnfolderBase]: 22260/29501 cut-off events. [2024-11-13 13:49:23,634 INFO L125 PetriNetUnfolderBase]: For 54319/54659 co-relation queries the response was YES. [2024-11-13 13:49:23,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96312 conditions, 29501 events. 22260/29501 cut-off events. For 54319/54659 co-relation queries the response was YES. Maximal size of possible extension queue 1085. Compared 155238 event pairs, 2670 based on Foata normal form. 240/29737 useless extension candidates. Maximal degree in co-relation 86414. Up to 10004 conditions per place. [2024-11-13 13:49:23,804 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 160 selfloop transitions, 39 changer transitions 1/205 dead transitions. [2024-11-13 13:49:23,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 205 transitions, 1510 flow [2024-11-13 13:49:23,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 13:49:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 13:49:23,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-11-13 13:49:23,807 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-11-13 13:49:23,807 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 711 flow. Second operand 7 states and 176 transitions. [2024-11-13 13:49:23,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 205 transitions, 1510 flow [2024-11-13 13:49:24,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 205 transitions, 1465 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-13 13:49:24,300 INFO L231 Difference]: Finished difference. Result has 88 places, 104 transitions, 842 flow [2024-11-13 13:49:24,300 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=842, PETRI_PLACES=88, PETRI_TRANSITIONS=104} [2024-11-13 13:49:24,301 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-11-13 13:49:24,301 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 104 transitions, 842 flow [2024-11-13 13:49:24,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:24,301 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:24,301 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:24,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 13:49:24,302 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-13 13:49:24,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:24,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1916557592, now seen corresponding path program 5 times [2024-11-13 13:49:24,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:24,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058520816] [2024-11-13 13:49:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:24,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:24,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:24,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058520816] [2024-11-13 13:49:24,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058520816] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:49:24,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:49:24,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 13:49:24,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358830573] [2024-11-13 13:49:24,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:49:24,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:49:24,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:24,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:49:24,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:49:24,429 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 40 [2024-11-13 13:49:24,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 104 transitions, 842 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:24,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:24,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 40 [2024-11-13 13:49:24,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:49:27,310 INFO L124 PetriNetUnfolderBase]: 26337/34366 cut-off events. [2024-11-13 13:49:27,310 INFO L125 PetriNetUnfolderBase]: For 82464/82464 co-relation queries the response was YES. [2024-11-13 13:49:27,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115287 conditions, 34366 events. 26337/34366 cut-off events. For 82464/82464 co-relation queries the response was YES. Maximal size of possible extension queue 1098. Compared 172218 event pairs, 10209 based on Foata normal form. 168/34534 useless extension candidates. Maximal degree in co-relation 105330. Up to 22083 conditions per place. [2024-11-13 13:49:27,514 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 127 selfloop transitions, 28 changer transitions 1/157 dead transitions. [2024-11-13 13:49:27,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 157 transitions, 1299 flow [2024-11-13 13:49:27,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:49:27,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:49:27,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-11-13 13:49:27,516 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-13 13:49:27,516 INFO L175 Difference]: Start difference. First operand has 88 places, 104 transitions, 842 flow. Second operand 5 states and 125 transitions. [2024-11-13 13:49:27,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 157 transitions, 1299 flow [2024-11-13 13:49:28,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 157 transitions, 1260 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-13 13:49:28,291 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 855 flow [2024-11-13 13:49:28,292 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=855, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2024-11-13 13:49:28,292 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-11-13 13:49:28,293 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 855 flow [2024-11-13 13:49:28,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:28,293 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:28,293 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:28,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 13:49:28,293 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-13 13:49:28,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:28,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1286745982, now seen corresponding path program 3 times [2024-11-13 13:49:28,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:28,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746656874] [2024-11-13 13:49:28,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:28,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:28,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:28,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746656874] [2024-11-13 13:49:28,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746656874] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:49:28,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:49:28,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 13:49:28,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792334081] [2024-11-13 13:49:28,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:49:28,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 13:49:28,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:28,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 13:49:28,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-13 13:49:28,429 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 40 [2024-11-13 13:49:28,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 855 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:28,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:28,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 40 [2024-11-13 13:49:28,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:49:31,373 INFO L124 PetriNetUnfolderBase]: 27114/35359 cut-off events. [2024-11-13 13:49:31,373 INFO L125 PetriNetUnfolderBase]: For 89057/89057 co-relation queries the response was YES. [2024-11-13 13:49:31,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118638 conditions, 35359 events. 27114/35359 cut-off events. For 89057/89057 co-relation queries the response was YES. Maximal size of possible extension queue 1145. Compared 177451 event pairs, 10209 based on Foata normal form. 240/35599 useless extension candidates. Maximal degree in co-relation 109161. Up to 22083 conditions per place. [2024-11-13 13:49:31,590 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 142 selfloop transitions, 30 changer transitions 0/173 dead transitions. [2024-11-13 13:49:31,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 173 transitions, 1409 flow [2024-11-13 13:49:31,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 13:49:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 13:49:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-11-13 13:49:31,591 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-11-13 13:49:31,592 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 855 flow. Second operand 6 states and 143 transitions. [2024-11-13 13:49:31,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 173 transitions, 1409 flow [2024-11-13 13:49:32,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 173 transitions, 1347 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-13 13:49:32,161 INFO L231 Difference]: Finished difference. Result has 91 places, 105 transitions, 886 flow [2024-11-13 13:49:32,161 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=886, PETRI_PLACES=91, PETRI_TRANSITIONS=105} [2024-11-13 13:49:32,162 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-11-13 13:49:32,162 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 105 transitions, 886 flow [2024-11-13 13:49:32,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:32,162 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:32,162 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:32,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-13 13:49:32,163 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-13 13:49:32,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:32,163 INFO L85 PathProgramCache]: Analyzing trace with hash -470213328, now seen corresponding path program 6 times [2024-11-13 13:49:32,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:32,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229665180] [2024-11-13 13:49:32,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:32,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:32,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:32,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229665180] [2024-11-13 13:49:32,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229665180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:49:32,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538697386] [2024-11-13 13:49:32,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 13:49:32,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:49:32,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:49:32,264 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:49:32,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 13:49:32,350 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-13 13:49:32,351 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:49:32,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 13:49:32,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:49:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:32,418 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:49:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:32,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538697386] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:49:32,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:49:32,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-13 13:49:32,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51337557] [2024-11-13 13:49:32,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:49:32,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 13:49:32,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:32,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 13:49:32,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-13 13:49:32,481 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 40 [2024-11-13 13:49:32,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 105 transitions, 886 flow. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 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) [2024-11-13 13:49:32,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:32,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 40 [2024-11-13 13:49:32,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:49:36,270 INFO L124 PetriNetUnfolderBase]: 31829/41604 cut-off events. [2024-11-13 13:49:36,271 INFO L125 PetriNetUnfolderBase]: For 87302/87302 co-relation queries the response was YES. [2024-11-13 13:49:36,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137826 conditions, 41604 events. 31829/41604 cut-off events. For 87302/87302 co-relation queries the response was YES. Maximal size of possible extension queue 1359. Compared 216182 event pairs, 2741 based on Foata normal form. 270/41874 useless extension candidates. Maximal degree in co-relation 126736. Up to 8142 conditions per place. [2024-11-13 13:49:36,472 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 259 selfloop transitions, 73 changer transitions 1/334 dead transitions. [2024-11-13 13:49:36,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 334 transitions, 2249 flow [2024-11-13 13:49:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 13:49:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-13 13:49:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 359 transitions. [2024-11-13 13:49:36,474 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5983333333333334 [2024-11-13 13:49:36,474 INFO L175 Difference]: Start difference. First operand has 91 places, 105 transitions, 886 flow. Second operand 15 states and 359 transitions. [2024-11-13 13:49:36,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 334 transitions, 2249 flow [2024-11-13 13:49:37,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 334 transitions, 2193 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-13 13:49:37,092 INFO L231 Difference]: Finished difference. Result has 105 places, 118 transitions, 1120 flow [2024-11-13 13:49:37,093 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1120, PETRI_PLACES=105, PETRI_TRANSITIONS=118} [2024-11-13 13:49:37,093 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 61 predicate places. [2024-11-13 13:49:37,093 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 118 transitions, 1120 flow [2024-11-13 13:49:37,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 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) [2024-11-13 13:49:37,094 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:37,094 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:37,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 13:49:37,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 13:49:37,294 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-13 13:49:37,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:37,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1707353334, now seen corresponding path program 4 times [2024-11-13 13:49:37,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:37,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242273509] [2024-11-13 13:49:37,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:37,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:37,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:37,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242273509] [2024-11-13 13:49:37,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242273509] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:49:37,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:49:37,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 13:49:37,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992945283] [2024-11-13 13:49:37,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:49:37,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:49:37,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:37,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:49:37,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:49:37,663 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2024-11-13 13:49:37,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 118 transitions, 1120 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:37,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:37,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2024-11-13 13:49:37,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:49:40,794 INFO L124 PetriNetUnfolderBase]: 28172/37469 cut-off events. [2024-11-13 13:49:40,795 INFO L125 PetriNetUnfolderBase]: For 102822/102838 co-relation queries the response was YES. [2024-11-13 13:49:40,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130261 conditions, 37469 events. 28172/37469 cut-off events. For 102822/102838 co-relation queries the response was YES. Maximal size of possible extension queue 1395. Compared 204871 event pairs, 10367 based on Foata normal form. 36/37422 useless extension candidates. Maximal degree in co-relation 118691. Up to 24942 conditions per place. [2024-11-13 13:49:41,048 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 121 selfloop transitions, 24 changer transitions 10/165 dead transitions. [2024-11-13 13:49:41,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 165 transitions, 1555 flow [2024-11-13 13:49:41,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:49:41,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:49:41,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-11-13 13:49:41,049 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-11-13 13:49:41,050 INFO L175 Difference]: Start difference. First operand has 105 places, 118 transitions, 1120 flow. Second operand 5 states and 117 transitions. [2024-11-13 13:49:41,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 165 transitions, 1555 flow [2024-11-13 13:49:41,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 165 transitions, 1477 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-11-13 13:49:41,690 INFO L231 Difference]: Finished difference. Result has 103 places, 117 transitions, 1079 flow [2024-11-13 13:49:41,691 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1079, PETRI_PLACES=103, PETRI_TRANSITIONS=117} [2024-11-13 13:49:41,691 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-11-13 13:49:41,691 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 117 transitions, 1079 flow [2024-11-13 13:49:41,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:41,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:41,692 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:41,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-13 13:49:41,692 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-13 13:49:41,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:41,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1735065690, now seen corresponding path program 7 times [2024-11-13 13:49:41,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:41,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496280944] [2024-11-13 13:49:41,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:41,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:41,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:41,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496280944] [2024-11-13 13:49:41,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496280944] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:49:41,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:49:41,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 13:49:41,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790609806] [2024-11-13 13:49:41,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:49:41,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:49:41,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:41,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:49:41,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:49:41,784 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2024-11-13 13:49:41,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 117 transitions, 1079 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:41,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:41,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2024-11-13 13:49:41,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:49:44,892 INFO L124 PetriNetUnfolderBase]: 27831/36798 cut-off events. [2024-11-13 13:49:44,892 INFO L125 PetriNetUnfolderBase]: For 116240/116779 co-relation queries the response was YES. [2024-11-13 13:49:44,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128446 conditions, 36798 events. 27831/36798 cut-off events. For 116240/116779 co-relation queries the response was YES. Maximal size of possible extension queue 1462. Compared 197643 event pairs, 9730 based on Foata normal form. 171/36652 useless extension candidates. Maximal degree in co-relation 106090. Up to 17970 conditions per place. [2024-11-13 13:49:45,081 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 106 selfloop transitions, 29 changer transitions 9/164 dead transitions. [2024-11-13 13:49:45,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 164 transitions, 1526 flow [2024-11-13 13:49:45,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:49:45,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:49:45,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-11-13 13:49:45,082 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-11-13 13:49:45,082 INFO L175 Difference]: Start difference. First operand has 103 places, 117 transitions, 1079 flow. Second operand 5 states and 114 transitions. [2024-11-13 13:49:45,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 164 transitions, 1526 flow [2024-11-13 13:49:45,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 164 transitions, 1474 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-13 13:49:45,985 INFO L231 Difference]: Finished difference. Result has 103 places, 116 transitions, 1084 flow [2024-11-13 13:49:45,985 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1084, PETRI_PLACES=103, PETRI_TRANSITIONS=116} [2024-11-13 13:49:45,986 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-11-13 13:49:45,986 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 116 transitions, 1084 flow [2024-11-13 13:49:45,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:45,986 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:45,986 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:45,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 13:49:45,986 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-13 13:49:45,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:45,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1619099950, now seen corresponding path program 5 times [2024-11-13 13:49:45,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:45,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377653286] [2024-11-13 13:49:45,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:45,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:46,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:46,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377653286] [2024-11-13 13:49:46,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377653286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:49:46,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:49:46,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 13:49:46,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241379400] [2024-11-13 13:49:46,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:49:46,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 13:49:46,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:46,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 13:49:46,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-13 13:49:46,075 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 40 [2024-11-13 13:49:46,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 116 transitions, 1084 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:46,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:46,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 40 [2024-11-13 13:49:46,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:49:49,784 INFO L124 PetriNetUnfolderBase]: 33812/44097 cut-off events. [2024-11-13 13:49:49,784 INFO L125 PetriNetUnfolderBase]: For 127296/127296 co-relation queries the response was YES. [2024-11-13 13:49:49,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152698 conditions, 44097 events. 33812/44097 cut-off events. For 127296/127296 co-relation queries the response was YES. Maximal size of possible extension queue 1448. Compared 226907 event pairs, 9972 based on Foata normal form. 240/44337 useless extension candidates. Maximal degree in co-relation 127933. Up to 19176 conditions per place. [2024-11-13 13:49:49,992 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 157 selfloop transitions, 36 changer transitions 1/195 dead transitions. [2024-11-13 13:49:49,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 195 transitions, 1771 flow [2024-11-13 13:49:49,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 13:49:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 13:49:49,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-11-13 13:49:49,993 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-11-13 13:49:49,993 INFO L175 Difference]: Start difference. First operand has 103 places, 116 transitions, 1084 flow. Second operand 6 states and 145 transitions. [2024-11-13 13:49:49,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 195 transitions, 1771 flow [2024-11-13 13:49:50,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 195 transitions, 1705 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-13 13:49:50,893 INFO L231 Difference]: Finished difference. Result has 104 places, 119 transitions, 1139 flow [2024-11-13 13:49:50,894 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1139, PETRI_PLACES=104, PETRI_TRANSITIONS=119} [2024-11-13 13:49:50,894 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-11-13 13:49:50,894 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 119 transitions, 1139 flow [2024-11-13 13:49:50,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:50,894 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:50,895 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:50,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-13 13:49:50,895 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-13 13:49:50,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:50,895 INFO L85 PathProgramCache]: Analyzing trace with hash 2117155774, now seen corresponding path program 6 times [2024-11-13 13:49:50,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:50,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477066784] [2024-11-13 13:49:50,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:50,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:50,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:50,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:50,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477066784] [2024-11-13 13:49:50,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477066784] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:49:50,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:49:50,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 13:49:50,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962153292] [2024-11-13 13:49:50,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:49:50,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:49:50,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:50,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:49:50,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:49:50,967 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2024-11-13 13:49:50,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 119 transitions, 1139 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:50,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:50,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2024-11-13 13:49:50,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:49:53,781 INFO L124 PetriNetUnfolderBase]: 29668/39108 cut-off events. [2024-11-13 13:49:53,782 INFO L125 PetriNetUnfolderBase]: For 116425/116428 co-relation queries the response was YES. [2024-11-13 13:49:53,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135076 conditions, 39108 events. 29668/39108 cut-off events. For 116425/116428 co-relation queries the response was YES. Maximal size of possible extension queue 1446. Compared 207886 event pairs, 10989 based on Foata normal form. 36/39081 useless extension candidates. Maximal degree in co-relation 113002. Up to 20056 conditions per place. [2024-11-13 13:49:54,041 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 115 selfloop transitions, 28 changer transitions 10/164 dead transitions. [2024-11-13 13:49:54,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 164 transitions, 1566 flow [2024-11-13 13:49:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:49:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:49:54,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-11-13 13:49:54,042 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-11-13 13:49:54,042 INFO L175 Difference]: Start difference. First operand has 104 places, 119 transitions, 1139 flow. Second operand 5 states and 114 transitions. [2024-11-13 13:49:54,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 164 transitions, 1566 flow [2024-11-13 13:49:55,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 164 transitions, 1510 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-13 13:49:55,331 INFO L231 Difference]: Finished difference. Result has 106 places, 118 transitions, 1123 flow [2024-11-13 13:49:55,331 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1123, PETRI_PLACES=106, PETRI_TRANSITIONS=118} [2024-11-13 13:49:55,332 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-11-13 13:49:55,332 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 118 transitions, 1123 flow [2024-11-13 13:49:55,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:49:55,332 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:55,332 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:55,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-13 13:49:55,333 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-13 13:49:55,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:55,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1890990366, now seen corresponding path program 1 times [2024-11-13 13:49:55,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:55,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643894959] [2024-11-13 13:49:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:55,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:55,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:55,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643894959] [2024-11-13 13:49:55,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643894959] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:49:55,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109766608] [2024-11-13 13:49:55,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:55,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:49:55,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:49:55,540 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:49:55,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa421b00-1755-4332-a338-9ff0bc752228/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 13:49:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:55,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 13:49:55,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:49:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:49:55,806 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:49:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:49:55,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109766608] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:49:55,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:49:55,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-11-13 13:49:55,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311240152] [2024-11-13 13:49:55,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:49:55,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 13:49:55,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:55,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 13:49:55,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-13 13:49:55,871 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-13 13:49:55,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 118 transitions, 1123 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 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) [2024-11-13 13:49:55,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:55,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-13 13:49:55,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand