./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --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 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:30:28,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:30:28,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:30:28,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:30:28,454 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:30:28,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:30:28,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:30:28,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:30:28,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:30:28,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:30:28,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:30:28,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:30:28,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:30:28,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:30:28,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:30:28,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:30:28,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:30:28,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:30:28,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:30:28,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:30:28,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:30:28,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:30:28,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:30:28,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:30:28,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:30:28,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:30:28,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:30:28,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:30:28,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:30:28,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:30:28,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:30:28,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:30:28,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:30:28,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:30:28,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:30:28,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:30:28,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:30:28,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:30:28,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:30:28,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:30:28,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:30:28,495 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:30:28,518 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:30:28,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:30:28,519 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:30:28,519 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:30:28,520 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:30:28,520 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:30:28,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:30:28,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:30:28,521 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:30:28,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:30:28,522 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:30:28,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:30:28,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:30:28,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:30:28,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:30:28,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:30:28,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:30:28,524 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:30:28,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:30:28,524 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:30:28,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:30:28,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:30:28,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:30:28,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:30:28,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:30:28,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:30:28,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:30:28,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:30:28,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:30:28,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:30:28,527 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:30:28,527 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:30:28,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:30:28,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 [2022-11-18 20:30:28,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:30:28,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:30:28,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:30:28,834 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:30:28,835 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:30:28,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2022-11-18 20:30:28,909 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/data/af6f9e78a/c1646f59af4c44a7a3d5477a8d532a09/FLAG2359d1830 [2022-11-18 20:30:29,521 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:30:29,529 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2022-11-18 20:30:29,551 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/data/af6f9e78a/c1646f59af4c44a7a3d5477a8d532a09/FLAG2359d1830 [2022-11-18 20:30:29,795 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/data/af6f9e78a/c1646f59af4c44a7a3d5477a8d532a09 [2022-11-18 20:30:29,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:30:29,800 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:30:29,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:30:29,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:30:29,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:30:29,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:30:29" (1/1) ... [2022-11-18 20:30:29,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e150a6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:30:29, skipping insertion in model container [2022-11-18 20:30:29,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:30:29" (1/1) ... [2022-11-18 20:30:29,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:30:29,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:30:30,321 WARN L234 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_395a4056-fb8e-4852-a38d-187a925a4c0b/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i[41323,41336] [2022-11-18 20:30:30,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:30:30,389 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:30:30,446 WARN L234 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_395a4056-fb8e-4852-a38d-187a925a4c0b/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i[41323,41336] [2022-11-18 20:30:30,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:30:30,525 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:30:30,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:30:30 WrapperNode [2022-11-18 20:30:30,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:30:30,527 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:30:30,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:30:30,528 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:30:30,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:30:30" (1/1) ... [2022-11-18 20:30:30,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:30:30" (1/1) ... [2022-11-18 20:30:30,578 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 186 [2022-11-18 20:30:30,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:30:30,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:30:30,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:30:30,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:30:30,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:30:30" (1/1) ... [2022-11-18 20:30:30,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:30:30" (1/1) ... [2022-11-18 20:30:30,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:30:30" (1/1) ... [2022-11-18 20:30:30,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:30:30" (1/1) ... [2022-11-18 20:30:30,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:30:30" (1/1) ... [2022-11-18 20:30:30,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:30:30" (1/1) ... [2022-11-18 20:30:30,640 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:30:30" (1/1) ... [2022-11-18 20:30:30,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:30:30" (1/1) ... [2022-11-18 20:30:30,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:30:30,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:30:30,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:30:30,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:30:30,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:30:30" (1/1) ... [2022-11-18 20:30:30,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:30:30,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:30,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:30:30,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:30:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:30:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:30:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:30:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:30:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 20:30:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:30:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-18 20:30:30,737 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-18 20:30:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:30:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:30:30,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:30:30,740 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:30:31,007 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:30:31,009 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:30:31,416 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:30:31,429 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:30:31,432 INFO L300 CfgBuilder]: Removed 23 assume(true) statements. [2022-11-18 20:30:31,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:30:31 BoogieIcfgContainer [2022-11-18 20:30:31,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:30:31,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:30:31,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:30:31,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:30:31,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:30:29" (1/3) ... [2022-11-18 20:30:31,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b4ec45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:30:31, skipping insertion in model container [2022-11-18 20:30:31,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:30:30" (2/3) ... [2022-11-18 20:30:31,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b4ec45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:30:31, skipping insertion in model container [2022-11-18 20:30:31,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:30:31" (3/3) ... [2022-11-18 20:30:31,450 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2022-11-18 20:30:31,460 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:30:31,472 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:30:31,472 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-18 20:30:31,472 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:30:31,592 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-18 20:30:31,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 197 transitions, 402 flow [2022-11-18 20:30:31,809 INFO L130 PetriNetUnfolder]: 45/269 cut-off events. [2022-11-18 20:30:31,809 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-11-18 20:30:31,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 269 events. 45/269 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 861 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2022-11-18 20:30:31,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 197 transitions, 402 flow [2022-11-18 20:30:31,835 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 192 transitions, 389 flow [2022-11-18 20:30:31,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:30:31,862 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@5ed1e623, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:30:31,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-18 20:30:31,931 INFO L130 PetriNetUnfolder]: 12/129 cut-off events. [2022-11-18 20:30:31,932 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:30:31,932 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:31,933 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:31,933 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:30:31,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:31,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1781482587, now seen corresponding path program 1 times [2022-11-18 20:30:31,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:31,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29736785] [2022-11-18 20:30:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:31,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:30:32,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:32,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29736785] [2022-11-18 20:30:32,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29736785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:30:32,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:30:32,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:30:32,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45377964] [2022-11-18 20:30:32,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:30:32,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:30:32,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:32,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:30:32,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:30:32,343 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 197 [2022-11-18 20:30:32,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 192 transitions, 389 flow. Second operand has 2 states, 2 states have (on average 167.0) internal successors, (334), 2 states have internal predecessors, (334), 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) [2022-11-18 20:30:32,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:32,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 197 [2022-11-18 20:30:32,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:32,412 INFO L130 PetriNetUnfolder]: 4/221 cut-off events. [2022-11-18 20:30:32,413 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:30:32,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 221 events. 4/221 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 635 event pairs, 0 based on Foata normal form. 40/248 useless extension candidates. Maximal degree in co-relation 122. Up to 4 conditions per place. [2022-11-18 20:30:32,418 INFO L137 encePairwiseOnDemand]: 170/197 looper letters, 1 selfloop transitions, 0 changer transitions 1/163 dead transitions. [2022-11-18 20:30:32,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 163 transitions, 333 flow [2022-11-18 20:30:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:30:32,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:30:32,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 360 transitions. [2022-11-18 20:30:32,445 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9137055837563451 [2022-11-18 20:30:32,445 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 360 transitions. [2022-11-18 20:30:32,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 360 transitions. [2022-11-18 20:30:32,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:32,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 360 transitions. [2022-11-18 20:30:32,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 180.0) internal successors, (360), 2 states have internal predecessors, (360), 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) [2022-11-18 20:30:32,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 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) [2022-11-18 20:30:32,462 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 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) [2022-11-18 20:30:32,464 INFO L175 Difference]: Start difference. First operand has 165 places, 192 transitions, 389 flow. Second operand 2 states and 360 transitions. [2022-11-18 20:30:32,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 163 transitions, 333 flow [2022-11-18 20:30:32,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 163 transitions, 333 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:30:32,480 INFO L231 Difference]: Finished difference. Result has 164 places, 162 transitions, 329 flow [2022-11-18 20:30:32,482 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=329, PETRI_PLACES=164, PETRI_TRANSITIONS=162} [2022-11-18 20:30:32,489 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, -1 predicate places. [2022-11-18 20:30:32,489 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 162 transitions, 329 flow [2022-11-18 20:30:32,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 167.0) internal successors, (334), 2 states have internal predecessors, (334), 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) [2022-11-18 20:30:32,490 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:32,491 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:32,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:30:32,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:30:32,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:32,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1930485110, now seen corresponding path program 1 times [2022-11-18 20:30:32,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:32,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93572281] [2022-11-18 20:30:32,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:32,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:32,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:32,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93572281] [2022-11-18 20:30:32,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93572281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:30:32,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:30:32,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:30:32,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935034055] [2022-11-18 20:30:32,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:30:32,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:30:32,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:32,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:30:32,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:30:32,700 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 197 [2022-11-18 20:30:32,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 162 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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) [2022-11-18 20:30:32,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:32,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 197 [2022-11-18 20:30:32,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:32,759 INFO L130 PetriNetUnfolder]: 4/224 cut-off events. [2022-11-18 20:30:32,760 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:30:32,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 224 events. 4/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 633 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 239. Up to 9 conditions per place. [2022-11-18 20:30:32,763 INFO L137 encePairwiseOnDemand]: 194/197 looper letters, 10 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2022-11-18 20:30:32,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 166 transitions, 361 flow [2022-11-18 20:30:32,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:30:32,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:30:32,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2022-11-18 20:30:32,768 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8291032148900169 [2022-11-18 20:30:32,768 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2022-11-18 20:30:32,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2022-11-18 20:30:32,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:32,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2022-11-18 20:30:32,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 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) [2022-11-18 20:30:32,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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) [2022-11-18 20:30:32,775 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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) [2022-11-18 20:30:32,775 INFO L175 Difference]: Start difference. First operand has 164 places, 162 transitions, 329 flow. Second operand 3 states and 490 transitions. [2022-11-18 20:30:32,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 166 transitions, 361 flow [2022-11-18 20:30:32,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 166 transitions, 361 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:30:32,780 INFO L231 Difference]: Finished difference. Result has 166 places, 163 transitions, 341 flow [2022-11-18 20:30:32,780 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=341, PETRI_PLACES=166, PETRI_TRANSITIONS=163} [2022-11-18 20:30:32,781 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 1 predicate places. [2022-11-18 20:30:32,781 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 163 transitions, 341 flow [2022-11-18 20:30:32,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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) [2022-11-18 20:30:32,782 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:32,782 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:32,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:30:32,783 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:30:32,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:32,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1359391126, now seen corresponding path program 1 times [2022-11-18 20:30:32,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:32,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014662174] [2022-11-18 20:30:32,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:32,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:33,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:33,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014662174] [2022-11-18 20:30:33,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014662174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:33,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182917204] [2022-11-18 20:30:33,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:33,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:33,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:33,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:33,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:30:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:33,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:30:33,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:30:33,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:30:33,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182917204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:30:33,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:30:33,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-18 20:30:33,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478776174] [2022-11-18 20:30:33,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:30:33,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:30:33,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:33,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:30:33,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:30:33,257 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 197 [2022-11-18 20:30:33,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 163 transitions, 341 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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) [2022-11-18 20:30:33,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:33,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 197 [2022-11-18 20:30:33,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:33,333 INFO L130 PetriNetUnfolder]: 3/170 cut-off events. [2022-11-18 20:30:33,334 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:30:33,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 170 events. 3/170 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 321 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 188. Up to 6 conditions per place. [2022-11-18 20:30:33,336 INFO L137 encePairwiseOnDemand]: 194/197 looper letters, 8 selfloop transitions, 2 changer transitions 0/165 dead transitions. [2022-11-18 20:30:33,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 165 transitions, 365 flow [2022-11-18 20:30:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:30:33,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:30:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2022-11-18 20:30:33,340 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8257191201353637 [2022-11-18 20:30:33,340 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2022-11-18 20:30:33,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2022-11-18 20:30:33,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:33,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2022-11-18 20:30:33,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 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) [2022-11-18 20:30:33,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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) [2022-11-18 20:30:33,348 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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) [2022-11-18 20:30:33,348 INFO L175 Difference]: Start difference. First operand has 166 places, 163 transitions, 341 flow. Second operand 3 states and 488 transitions. [2022-11-18 20:30:33,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 165 transitions, 365 flow [2022-11-18 20:30:33,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 165 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:30:33,356 INFO L231 Difference]: Finished difference. Result has 168 places, 163 transitions, 347 flow [2022-11-18 20:30:33,357 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=168, PETRI_TRANSITIONS=163} [2022-11-18 20:30:33,360 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 3 predicate places. [2022-11-18 20:30:33,360 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 163 transitions, 347 flow [2022-11-18 20:30:33,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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) [2022-11-18 20:30:33,361 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:33,362 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:33,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 20:30:33,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:33,568 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:30:33,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:33,568 INFO L85 PathProgramCache]: Analyzing trace with hash -2122964676, now seen corresponding path program 1 times [2022-11-18 20:30:33,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:33,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700771861] [2022-11-18 20:30:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:33,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:30:33,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:33,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700771861] [2022-11-18 20:30:33,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700771861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:33,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119204697] [2022-11-18 20:30:33,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:33,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:33,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:33,764 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:33,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:30:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:33,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:30:33,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:30:33,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:30:34,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119204697] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:34,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:34,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 20:30:34,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797759836] [2022-11-18 20:30:34,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:34,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:30:34,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:34,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:30:34,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:30:34,028 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 197 [2022-11-18 20:30:34,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 163 transitions, 347 flow. Second operand has 10 states, 10 states have (on average 160.1) internal successors, (1601), 10 states have internal predecessors, (1601), 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) [2022-11-18 20:30:34,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:34,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 197 [2022-11-18 20:30:34,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:34,182 INFO L130 PetriNetUnfolder]: 3/177 cut-off events. [2022-11-18 20:30:34,182 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:30:34,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 177 events. 3/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 316 event pairs, 0 based on Foata normal form. 2/173 useless extension candidates. Maximal degree in co-relation 209. Up to 6 conditions per place. [2022-11-18 20:30:34,185 INFO L137 encePairwiseOnDemand]: 191/197 looper letters, 11 selfloop transitions, 9 changer transitions 0/173 dead transitions. [2022-11-18 20:30:34,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 173 transitions, 409 flow [2022-11-18 20:30:34,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:30:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:30:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1444 transitions. [2022-11-18 20:30:34,190 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.81443880428652 [2022-11-18 20:30:34,190 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1444 transitions. [2022-11-18 20:30:34,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1444 transitions. [2022-11-18 20:30:34,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:34,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1444 transitions. [2022-11-18 20:30:34,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.44444444444446) internal successors, (1444), 9 states have internal predecessors, (1444), 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) [2022-11-18 20:30:34,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 197.0) internal successors, (1970), 10 states have internal predecessors, (1970), 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) [2022-11-18 20:30:34,203 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 197.0) internal successors, (1970), 10 states have internal predecessors, (1970), 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) [2022-11-18 20:30:34,204 INFO L175 Difference]: Start difference. First operand has 168 places, 163 transitions, 347 flow. Second operand 9 states and 1444 transitions. [2022-11-18 20:30:34,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 173 transitions, 409 flow [2022-11-18 20:30:34,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 173 transitions, 405 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 20:30:34,210 INFO L231 Difference]: Finished difference. Result has 177 places, 169 transitions, 393 flow [2022-11-18 20:30:34,210 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=393, PETRI_PLACES=177, PETRI_TRANSITIONS=169} [2022-11-18 20:30:34,211 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 12 predicate places. [2022-11-18 20:30:34,211 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 169 transitions, 393 flow [2022-11-18 20:30:34,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 160.1) internal successors, (1601), 10 states have internal predecessors, (1601), 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) [2022-11-18 20:30:34,213 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:34,214 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:34,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:34,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-18 20:30:34,421 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:30:34,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:34,421 INFO L85 PathProgramCache]: Analyzing trace with hash -224916164, now seen corresponding path program 2 times [2022-11-18 20:30:34,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:34,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899895100] [2022-11-18 20:30:34,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:34,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:30:34,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:34,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899895100] [2022-11-18 20:30:34,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899895100] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:34,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034479644] [2022-11-18 20:30:34,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:30:34,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:34,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:34,598 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:34,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:30:34,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:30:34,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:34,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:30:34,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:30:34,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:30:34,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034479644] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:34,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:34,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 20:30:34,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169600519] [2022-11-18 20:30:34,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:34,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:30:34,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:34,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:30:34,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:30:34,906 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 197 [2022-11-18 20:30:34,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 169 transitions, 393 flow. Second operand has 18 states, 18 states have (on average 160.27777777777777) internal successors, (2885), 18 states have internal predecessors, (2885), 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) [2022-11-18 20:30:34,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:34,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 197 [2022-11-18 20:30:34,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:35,176 INFO L130 PetriNetUnfolder]: 3/197 cut-off events. [2022-11-18 20:30:35,176 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-18 20:30:35,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 197 events. 3/197 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 316 event pairs, 0 based on Foata normal form. 4/195 useless extension candidates. Maximal degree in co-relation 295. Up to 11 conditions per place. [2022-11-18 20:30:35,179 INFO L137 encePairwiseOnDemand]: 191/197 looper letters, 19 selfloop transitions, 21 changer transitions 0/193 dead transitions. [2022-11-18 20:30:35,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 193 transitions, 581 flow [2022-11-18 20:30:35,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:30:35,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 20:30:35,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3362 transitions. [2022-11-18 20:30:35,187 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8126661832245589 [2022-11-18 20:30:35,188 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3362 transitions. [2022-11-18 20:30:35,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3362 transitions. [2022-11-18 20:30:35,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:35,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3362 transitions. [2022-11-18 20:30:35,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 160.0952380952381) internal successors, (3362), 21 states have internal predecessors, (3362), 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) [2022-11-18 20:30:35,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 197.0) internal successors, (4334), 22 states have internal predecessors, (4334), 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) [2022-11-18 20:30:35,210 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 197.0) internal successors, (4334), 22 states have internal predecessors, (4334), 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) [2022-11-18 20:30:35,211 INFO L175 Difference]: Start difference. First operand has 177 places, 169 transitions, 393 flow. Second operand 21 states and 3362 transitions. [2022-11-18 20:30:35,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 193 transitions, 581 flow [2022-11-18 20:30:35,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 193 transitions, 567 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 20:30:35,223 INFO L231 Difference]: Finished difference. Result has 201 places, 182 transitions, 517 flow [2022-11-18 20:30:35,223 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=517, PETRI_PLACES=201, PETRI_TRANSITIONS=182} [2022-11-18 20:30:35,226 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 36 predicate places. [2022-11-18 20:30:35,226 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 182 transitions, 517 flow [2022-11-18 20:30:35,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 160.27777777777777) internal successors, (2885), 18 states have internal predecessors, (2885), 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) [2022-11-18 20:30:35,230 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:35,231 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:35,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:35,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:35,437 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:30:35,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:35,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1674123972, now seen corresponding path program 3 times [2022-11-18 20:30:35,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:35,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205530542] [2022-11-18 20:30:35,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:35,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:35,933 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:30:35,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:35,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205530542] [2022-11-18 20:30:35,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205530542] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:35,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012651373] [2022-11-18 20:30:35,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:30:35,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:35,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:35,937 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:35,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:30:36,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-18 20:30:36,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:36,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:30:36,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:30:36,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:30:36,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012651373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:36,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:36,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-18 20:30:36,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583228752] [2022-11-18 20:30:36,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:36,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:30:36,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:36,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:30:36,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:30:36,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 197 [2022-11-18 20:30:36,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 182 transitions, 517 flow. Second operand has 23 states, 23 states have (on average 160.43478260869566) internal successors, (3690), 23 states have internal predecessors, (3690), 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) [2022-11-18 20:30:36,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:36,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 197 [2022-11-18 20:30:36,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:36,932 INFO L130 PetriNetUnfolder]: 3/212 cut-off events. [2022-11-18 20:30:36,932 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-18 20:30:36,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 212 events. 3/212 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 316 event pairs, 0 based on Foata normal form. 3/209 useless extension candidates. Maximal degree in co-relation 391. Up to 17 conditions per place. [2022-11-18 20:30:36,934 INFO L137 encePairwiseOnDemand]: 191/197 looper letters, 25 selfloop transitions, 30 changer transitions 0/208 dead transitions. [2022-11-18 20:30:36,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 208 transitions, 773 flow [2022-11-18 20:30:36,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 20:30:36,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-18 20:30:36,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4798 transitions. [2022-11-18 20:30:36,945 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.811844331641286 [2022-11-18 20:30:36,946 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4798 transitions. [2022-11-18 20:30:36,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4798 transitions. [2022-11-18 20:30:36,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:36,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4798 transitions. [2022-11-18 20:30:36,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 159.93333333333334) internal successors, (4798), 30 states have internal predecessors, (4798), 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) [2022-11-18 20:30:36,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 197.0) internal successors, (6107), 31 states have internal predecessors, (6107), 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) [2022-11-18 20:30:36,978 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 197.0) internal successors, (6107), 31 states have internal predecessors, (6107), 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) [2022-11-18 20:30:36,978 INFO L175 Difference]: Start difference. First operand has 201 places, 182 transitions, 517 flow. Second operand 30 states and 4798 transitions. [2022-11-18 20:30:36,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 208 transitions, 773 flow [2022-11-18 20:30:36,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 208 transitions, 743 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-18 20:30:36,993 INFO L231 Difference]: Finished difference. Result has 228 places, 192 transitions, 645 flow [2022-11-18 20:30:36,994 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=197, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=645, PETRI_PLACES=228, PETRI_TRANSITIONS=192} [2022-11-18 20:30:36,995 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 63 predicate places. [2022-11-18 20:30:36,995 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 192 transitions, 645 flow [2022-11-18 20:30:36,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 160.43478260869566) internal successors, (3690), 23 states have internal predecessors, (3690), 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) [2022-11-18 20:30:36,997 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:36,997 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:37,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:37,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:37,203 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-18 20:30:37,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:37,204 INFO L85 PathProgramCache]: Analyzing trace with hash -164939492, now seen corresponding path program 4 times [2022-11-18 20:30:37,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:37,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527441843] [2022-11-18 20:30:37,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:37,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:30:37,250 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:30:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:30:37,322 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:30:37,322 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:30:37,323 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-18 20:30:37,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-18 20:30:37,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-18 20:30:37,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-18 20:30:37,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 20:30:37,327 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-11-18 20:30:37,330 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:30:37,330 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-18 20:30:37,378 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 20:30:37,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 269 transitions, 556 flow [2022-11-18 20:30:37,474 INFO L130 PetriNetUnfolder]: 75/438 cut-off events. [2022-11-18 20:30:37,475 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-11-18 20:30:37,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 438 events. 75/438 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1750 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 271. Up to 12 conditions per place. [2022-11-18 20:30:37,480 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 269 transitions, 556 flow [2022-11-18 20:30:37,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 269 transitions, 556 flow [2022-11-18 20:30:37,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:30:37,497 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@5ed1e623, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:30:37,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-18 20:30:37,512 INFO L130 PetriNetUnfolder]: 14/136 cut-off events. [2022-11-18 20:30:37,512 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:30:37,513 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:37,513 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:37,513 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-18 20:30:37,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:37,514 INFO L85 PathProgramCache]: Analyzing trace with hash -112997612, now seen corresponding path program 1 times [2022-11-18 20:30:37,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:37,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362421663] [2022-11-18 20:30:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:37,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:37,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:37,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362421663] [2022-11-18 20:30:37,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362421663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:30:37,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:30:37,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:30:37,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004560585] [2022-11-18 20:30:37,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:30:37,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:30:37,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:30:37,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:30:37,540 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 269 [2022-11-18 20:30:37,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 269 transitions, 556 flow. Second operand has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 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) [2022-11-18 20:30:37,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:37,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 269 [2022-11-18 20:30:37,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:37,628 INFO L130 PetriNetUnfolder]: 9/367 cut-off events. [2022-11-18 20:30:37,628 INFO L131 PetriNetUnfolder]: For 18/22 co-relation queries the response was YES. [2022-11-18 20:30:37,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 367 events. 9/367 cut-off events. For 18/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1424 event pairs, 0 based on Foata normal form. 91/437 useless extension candidates. Maximal degree in co-relation 230. Up to 7 conditions per place. [2022-11-18 20:30:37,634 INFO L137 encePairwiseOnDemand]: 230/269 looper letters, 4 selfloop transitions, 0 changer transitions 1/227 dead transitions. [2022-11-18 20:30:37,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 227 transitions, 480 flow [2022-11-18 20:30:37,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:30:37,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:30:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 489 transitions. [2022-11-18 20:30:37,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9089219330855018 [2022-11-18 20:30:37,636 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 489 transitions. [2022-11-18 20:30:37,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 489 transitions. [2022-11-18 20:30:37,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:37,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 489 transitions. [2022-11-18 20:30:37,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 244.5) internal successors, (489), 2 states have internal predecessors, (489), 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) [2022-11-18 20:30:37,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 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) [2022-11-18 20:30:37,640 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 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) [2022-11-18 20:30:37,641 INFO L175 Difference]: Start difference. First operand has 229 places, 269 transitions, 556 flow. Second operand 2 states and 489 transitions. [2022-11-18 20:30:37,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 227 transitions, 480 flow [2022-11-18 20:30:37,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 227 transitions, 480 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:30:37,646 INFO L231 Difference]: Finished difference. Result has 227 places, 226 transitions, 470 flow [2022-11-18 20:30:37,647 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=470, PETRI_PLACES=227, PETRI_TRANSITIONS=226} [2022-11-18 20:30:37,647 INFO L288 CegarLoopForPetriNet]: 229 programPoint places, -2 predicate places. [2022-11-18 20:30:37,648 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 226 transitions, 470 flow [2022-11-18 20:30:37,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 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) [2022-11-18 20:30:37,648 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:37,648 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:37,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 20:30:37,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-18 20:30:37,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:37,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1938799082, now seen corresponding path program 1 times [2022-11-18 20:30:37,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:37,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322219846] [2022-11-18 20:30:37,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:37,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:37,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:37,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322219846] [2022-11-18 20:30:37,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322219846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:30:37,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:30:37,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:30:37,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360173366] [2022-11-18 20:30:37,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:30:37,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:30:37,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:37,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:30:37,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:30:37,691 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 269 [2022-11-18 20:30:37,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 226 transitions, 470 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 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) [2022-11-18 20:30:37,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:37,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 269 [2022-11-18 20:30:37,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:37,798 INFO L130 PetriNetUnfolder]: 9/370 cut-off events. [2022-11-18 20:30:37,798 INFO L131 PetriNetUnfolder]: For 18/22 co-relation queries the response was YES. [2022-11-18 20:30:37,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 370 events. 9/370 cut-off events. For 18/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1418 event pairs, 0 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 398. Up to 14 conditions per place. [2022-11-18 20:30:37,804 INFO L137 encePairwiseOnDemand]: 266/269 looper letters, 13 selfloop transitions, 2 changer transitions 0/230 dead transitions. [2022-11-18 20:30:37,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 230 transitions, 508 flow [2022-11-18 20:30:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:30:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:30:37,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2022-11-18 20:30:37,806 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8228004956629492 [2022-11-18 20:30:37,807 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2022-11-18 20:30:37,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2022-11-18 20:30:37,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:37,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2022-11-18 20:30:37,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 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) [2022-11-18 20:30:37,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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) [2022-11-18 20:30:37,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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) [2022-11-18 20:30:37,831 INFO L175 Difference]: Start difference. First operand has 227 places, 226 transitions, 470 flow. Second operand 3 states and 664 transitions. [2022-11-18 20:30:37,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 230 transitions, 508 flow [2022-11-18 20:30:37,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 230 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:30:37,837 INFO L231 Difference]: Finished difference. Result has 229 places, 227 transitions, 482 flow [2022-11-18 20:30:37,838 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=482, PETRI_PLACES=229, PETRI_TRANSITIONS=227} [2022-11-18 20:30:37,839 INFO L288 CegarLoopForPetriNet]: 229 programPoint places, 0 predicate places. [2022-11-18 20:30:37,840 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 227 transitions, 482 flow [2022-11-18 20:30:37,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 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) [2022-11-18 20:30:37,841 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:37,842 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:37,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 20:30:37,842 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-18 20:30:37,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:37,843 INFO L85 PathProgramCache]: Analyzing trace with hash -748899645, now seen corresponding path program 1 times [2022-11-18 20:30:37,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:37,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679104770] [2022-11-18 20:30:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:37,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:37,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679104770] [2022-11-18 20:30:37,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679104770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092042394] [2022-11-18 20:30:37,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:37,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:37,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:37,929 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:37,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:30:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:38,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:30:38,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:30:38,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:30:38,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092042394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:30:38,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:30:38,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-18 20:30:38,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886781671] [2022-11-18 20:30:38,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:30:38,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:30:38,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:38,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:30:38,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:30:38,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 269 [2022-11-18 20:30:38,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 227 transitions, 482 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 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) [2022-11-18 20:30:38,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:38,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 269 [2022-11-18 20:30:38,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:38,231 INFO L130 PetriNetUnfolder]: 7/325 cut-off events. [2022-11-18 20:30:38,232 INFO L131 PetriNetUnfolder]: For 15/34 co-relation queries the response was YES. [2022-11-18 20:30:38,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 325 events. 7/325 cut-off events. For 15/34 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1110 event pairs, 0 based on Foata normal form. 1/310 useless extension candidates. Maximal degree in co-relation 361. Up to 16 conditions per place. [2022-11-18 20:30:38,237 INFO L137 encePairwiseOnDemand]: 266/269 looper letters, 13 selfloop transitions, 2 changer transitions 0/231 dead transitions. [2022-11-18 20:30:38,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 231 transitions, 520 flow [2022-11-18 20:30:38,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:30:38,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:30:38,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2022-11-18 20:30:38,241 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8228004956629492 [2022-11-18 20:30:38,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2022-11-18 20:30:38,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2022-11-18 20:30:38,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:38,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2022-11-18 20:30:38,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 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) [2022-11-18 20:30:38,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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) [2022-11-18 20:30:38,248 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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) [2022-11-18 20:30:38,248 INFO L175 Difference]: Start difference. First operand has 229 places, 227 transitions, 482 flow. Second operand 3 states and 664 transitions. [2022-11-18 20:30:38,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 231 transitions, 520 flow [2022-11-18 20:30:38,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 231 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:30:38,255 INFO L231 Difference]: Finished difference. Result has 231 places, 228 transitions, 492 flow [2022-11-18 20:30:38,256 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=492, PETRI_PLACES=231, PETRI_TRANSITIONS=228} [2022-11-18 20:30:38,257 INFO L288 CegarLoopForPetriNet]: 229 programPoint places, 2 predicate places. [2022-11-18 20:30:38,257 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 228 transitions, 492 flow [2022-11-18 20:30:38,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 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) [2022-11-18 20:30:38,258 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:38,258 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:38,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:38,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:30:38,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-18 20:30:38,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:38,475 INFO L85 PathProgramCache]: Analyzing trace with hash 819989907, now seen corresponding path program 1 times [2022-11-18 20:30:38,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:38,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459637702] [2022-11-18 20:30:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:38,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:30:38,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:38,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459637702] [2022-11-18 20:30:38,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459637702] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:38,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592575589] [2022-11-18 20:30:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:38,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:38,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:38,567 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:38,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:30:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:38,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:30:38,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:30:38,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:30:38,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592575589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:38,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:38,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 20:30:38,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717685280] [2022-11-18 20:30:38,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:38,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:30:38,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:38,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:30:38,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:30:38,763 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 269 [2022-11-18 20:30:38,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 228 transitions, 492 flow. Second operand has 10 states, 10 states have (on average 217.2) internal successors, (2172), 10 states have internal predecessors, (2172), 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) [2022-11-18 20:30:38,766 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:38,766 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 269 [2022-11-18 20:30:38,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:38,916 INFO L130 PetriNetUnfolder]: 7/332 cut-off events. [2022-11-18 20:30:38,916 INFO L131 PetriNetUnfolder]: For 19/23 co-relation queries the response was YES. [2022-11-18 20:30:38,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 332 events. 7/332 cut-off events. For 19/23 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1105 event pairs, 0 based on Foata normal form. 2/320 useless extension candidates. Maximal degree in co-relation 379. Up to 11 conditions per place. [2022-11-18 20:30:38,921 INFO L137 encePairwiseOnDemand]: 263/269 looper letters, 14 selfloop transitions, 9 changer transitions 0/238 dead transitions. [2022-11-18 20:30:38,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 238 transitions, 560 flow [2022-11-18 20:30:38,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:30:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:30:38,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1960 transitions. [2022-11-18 20:30:38,927 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8095828170177612 [2022-11-18 20:30:38,928 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1960 transitions. [2022-11-18 20:30:38,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1960 transitions. [2022-11-18 20:30:38,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:38,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1960 transitions. [2022-11-18 20:30:38,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 217.77777777777777) internal successors, (1960), 9 states have internal predecessors, (1960), 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) [2022-11-18 20:30:38,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 269.0) internal successors, (2690), 10 states have internal predecessors, (2690), 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) [2022-11-18 20:30:38,939 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 269.0) internal successors, (2690), 10 states have internal predecessors, (2690), 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) [2022-11-18 20:30:38,939 INFO L175 Difference]: Start difference. First operand has 231 places, 228 transitions, 492 flow. Second operand 9 states and 1960 transitions. [2022-11-18 20:30:38,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 238 transitions, 560 flow [2022-11-18 20:30:38,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 238 transitions, 558 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:30:38,945 INFO L231 Difference]: Finished difference. Result has 241 places, 234 transitions, 540 flow [2022-11-18 20:30:38,946 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=540, PETRI_PLACES=241, PETRI_TRANSITIONS=234} [2022-11-18 20:30:38,947 INFO L288 CegarLoopForPetriNet]: 229 programPoint places, 12 predicate places. [2022-11-18 20:30:38,947 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 234 transitions, 540 flow [2022-11-18 20:30:38,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 217.2) internal successors, (2172), 10 states have internal predecessors, (2172), 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) [2022-11-18 20:30:38,948 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:38,948 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:38,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:39,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:30:39,155 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-18 20:30:39,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:39,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1367172467, now seen corresponding path program 2 times [2022-11-18 20:30:39,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:39,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987097806] [2022-11-18 20:30:39,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:39,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:30:39,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:39,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987097806] [2022-11-18 20:30:39,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987097806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:39,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154155970] [2022-11-18 20:30:39,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:30:39,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:39,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:39,324 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:39,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:30:39,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:30:39,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:39,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:30:39,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:30:39,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:30:39,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154155970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:39,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:39,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 20:30:39,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309298603] [2022-11-18 20:30:39,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:39,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:30:39,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:39,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:30:39,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:30:39,686 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 269 [2022-11-18 20:30:39,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 234 transitions, 540 flow. Second operand has 18 states, 18 states have (on average 217.33333333333334) internal successors, (3912), 18 states have internal predecessors, (3912), 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) [2022-11-18 20:30:39,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:39,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 269 [2022-11-18 20:30:39,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:40,062 INFO L130 PetriNetUnfolder]: 7/352 cut-off events. [2022-11-18 20:30:40,063 INFO L131 PetriNetUnfolder]: For 39/43 co-relation queries the response was YES. [2022-11-18 20:30:40,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 352 events. 7/352 cut-off events. For 39/43 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1106 event pairs, 0 based on Foata normal form. 4/342 useless extension candidates. Maximal degree in co-relation 466. Up to 11 conditions per place. [2022-11-18 20:30:40,069 INFO L137 encePairwiseOnDemand]: 263/269 looper letters, 22 selfloop transitions, 21 changer transitions 0/258 dead transitions. [2022-11-18 20:30:40,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 258 transitions, 734 flow [2022-11-18 20:30:40,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:30:40,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 20:30:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4562 transitions. [2022-11-18 20:30:40,082 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8075765622234023 [2022-11-18 20:30:40,082 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4562 transitions. [2022-11-18 20:30:40,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4562 transitions. [2022-11-18 20:30:40,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:40,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4562 transitions. [2022-11-18 20:30:40,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 217.23809523809524) internal successors, (4562), 21 states have internal predecessors, (4562), 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) [2022-11-18 20:30:40,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 269.0) internal successors, (5918), 22 states have internal predecessors, (5918), 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) [2022-11-18 20:30:40,110 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 269.0) internal successors, (5918), 22 states have internal predecessors, (5918), 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) [2022-11-18 20:30:40,111 INFO L175 Difference]: Start difference. First operand has 241 places, 234 transitions, 540 flow. Second operand 21 states and 4562 transitions. [2022-11-18 20:30:40,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 258 transitions, 734 flow [2022-11-18 20:30:40,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 258 transitions, 720 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 20:30:40,118 INFO L231 Difference]: Finished difference. Result has 265 places, 247 transitions, 664 flow [2022-11-18 20:30:40,119 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=664, PETRI_PLACES=265, PETRI_TRANSITIONS=247} [2022-11-18 20:30:40,120 INFO L288 CegarLoopForPetriNet]: 229 programPoint places, 36 predicate places. [2022-11-18 20:30:40,120 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 247 transitions, 664 flow [2022-11-18 20:30:40,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 217.33333333333334) internal successors, (3912), 18 states have internal predecessors, (3912), 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) [2022-11-18 20:30:40,122 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:40,122 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:40,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:40,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:30:40,330 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-18 20:30:40,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:40,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1004991181, now seen corresponding path program 3 times [2022-11-18 20:30:40,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:40,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738190331] [2022-11-18 20:30:40,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:40,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:30:40,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:40,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738190331] [2022-11-18 20:30:40,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738190331] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:40,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512999844] [2022-11-18 20:30:40,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:30:40,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:40,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:40,716 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:40,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:30:40,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-18 20:30:40,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:40,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:30:40,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:30:41,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 20:30:41,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512999844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:41,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:41,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-18 20:30:41,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779192663] [2022-11-18 20:30:41,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:41,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:30:41,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:41,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:30:41,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:30:41,377 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 269 [2022-11-18 20:30:41,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 247 transitions, 664 flow. Second operand has 23 states, 23 states have (on average 217.47826086956522) internal successors, (5002), 23 states have internal predecessors, (5002), 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) [2022-11-18 20:30:41,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:41,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 269 [2022-11-18 20:30:41,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:41,881 INFO L130 PetriNetUnfolder]: 7/367 cut-off events. [2022-11-18 20:30:41,881 INFO L131 PetriNetUnfolder]: For 127/131 co-relation queries the response was YES. [2022-11-18 20:30:41,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 367 events. 7/367 cut-off events. For 127/131 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1106 event pairs, 0 based on Foata normal form. 3/356 useless extension candidates. Maximal degree in co-relation 562. Up to 17 conditions per place. [2022-11-18 20:30:41,887 INFO L137 encePairwiseOnDemand]: 263/269 looper letters, 28 selfloop transitions, 30 changer transitions 0/273 dead transitions. [2022-11-18 20:30:41,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 273 transitions, 926 flow [2022-11-18 20:30:41,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 20:30:41,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-18 20:30:41,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6511 transitions. [2022-11-18 20:30:41,900 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8068153655514251 [2022-11-18 20:30:41,900 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6511 transitions. [2022-11-18 20:30:41,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6511 transitions. [2022-11-18 20:30:41,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:41,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6511 transitions. [2022-11-18 20:30:41,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 217.03333333333333) internal successors, (6511), 30 states have internal predecessors, (6511), 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) [2022-11-18 20:30:41,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 269.0) internal successors, (8339), 31 states have internal predecessors, (8339), 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) [2022-11-18 20:30:41,933 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 269.0) internal successors, (8339), 31 states have internal predecessors, (8339), 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) [2022-11-18 20:30:41,934 INFO L175 Difference]: Start difference. First operand has 265 places, 247 transitions, 664 flow. Second operand 30 states and 6511 transitions. [2022-11-18 20:30:41,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 273 transitions, 926 flow [2022-11-18 20:30:41,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 273 transitions, 896 flow, removed 9 selfloop flow, removed 6 redundant places. [2022-11-18 20:30:41,943 INFO L231 Difference]: Finished difference. Result has 292 places, 257 transitions, 792 flow [2022-11-18 20:30:41,943 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=792, PETRI_PLACES=292, PETRI_TRANSITIONS=257} [2022-11-18 20:30:41,944 INFO L288 CegarLoopForPetriNet]: 229 programPoint places, 63 predicate places. [2022-11-18 20:30:41,944 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 257 transitions, 792 flow [2022-11-18 20:30:41,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 217.47826086956522) internal successors, (5002), 23 states have internal predecessors, (5002), 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) [2022-11-18 20:30:41,947 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:41,947 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:41,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:42,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:42,153 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-18 20:30:42,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:42,154 INFO L85 PathProgramCache]: Analyzing trace with hash 938701254, now seen corresponding path program 4 times [2022-11-18 20:30:42,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:42,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822397933] [2022-11-18 20:30:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:42,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:30:42,185 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:30:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:30:42,217 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:30:42,217 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:30:42,217 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-18 20:30:42,217 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-18 20:30:42,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-18 20:30:42,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-18 20:30:42,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-18 20:30:42,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 20:30:42,219 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-11-18 20:30:42,220 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:30:42,220 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-18 20:30:42,259 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 20:30:42,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 341 transitions, 712 flow [2022-11-18 20:30:42,421 INFO L130 PetriNetUnfolder]: 110/640 cut-off events. [2022-11-18 20:30:42,421 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-11-18 20:30:42,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 640 events. 110/640 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2836 event pairs, 1 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 446. Up to 16 conditions per place. [2022-11-18 20:30:42,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 289 places, 341 transitions, 712 flow [2022-11-18 20:30:42,442 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 341 transitions, 712 flow [2022-11-18 20:30:42,443 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:30:42,443 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@5ed1e623, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:30:42,444 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-18 20:30:42,456 INFO L130 PetriNetUnfolder]: 14/136 cut-off events. [2022-11-18 20:30:42,456 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:30:42,456 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:42,456 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:42,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-18 20:30:42,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:42,460 INFO L85 PathProgramCache]: Analyzing trace with hash -403630924, now seen corresponding path program 1 times [2022-11-18 20:30:42,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:42,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507261358] [2022-11-18 20:30:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:42,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:42,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:42,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507261358] [2022-11-18 20:30:42,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507261358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:30:42,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:30:42,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:30:42,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811923137] [2022-11-18 20:30:42,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:30:42,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:30:42,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:42,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:30:42,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:30:42,493 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 341 [2022-11-18 20:30:42,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 341 transitions, 712 flow. Second operand has 2 states, 2 states have (on average 281.0) internal successors, (562), 2 states have internal predecessors, (562), 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) [2022-11-18 20:30:42,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:42,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 341 [2022-11-18 20:30:42,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:42,637 INFO L130 PetriNetUnfolder]: 16/539 cut-off events. [2022-11-18 20:30:42,637 INFO L131 PetriNetUnfolder]: For 53/68 co-relation queries the response was YES. [2022-11-18 20:30:42,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 539 events. 16/539 cut-off events. For 53/68 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2454 event pairs, 1 based on Foata normal form. 209/717 useless extension candidates. Maximal degree in co-relation 381. Up to 16 conditions per place. [2022-11-18 20:30:42,651 INFO L137 encePairwiseOnDemand]: 290/341 looper letters, 6 selfloop transitions, 0 changer transitions 1/286 dead transitions. [2022-11-18 20:30:42,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 286 transitions, 614 flow [2022-11-18 20:30:42,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:30:42,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:30:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 617 transitions. [2022-11-18 20:30:42,653 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9046920821114369 [2022-11-18 20:30:42,653 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 617 transitions. [2022-11-18 20:30:42,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 617 transitions. [2022-11-18 20:30:42,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:42,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 617 transitions. [2022-11-18 20:30:42,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 308.5) internal successors, (617), 2 states have internal predecessors, (617), 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) [2022-11-18 20:30:42,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 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) [2022-11-18 20:30:42,657 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 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) [2022-11-18 20:30:42,658 INFO L175 Difference]: Start difference. First operand has 289 places, 341 transitions, 712 flow. Second operand 2 states and 617 transitions. [2022-11-18 20:30:42,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 286 transitions, 614 flow [2022-11-18 20:30:42,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 286 transitions, 614 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:30:42,665 INFO L231 Difference]: Finished difference. Result has 286 places, 285 transitions, 600 flow [2022-11-18 20:30:42,665 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=600, PETRI_PLACES=286, PETRI_TRANSITIONS=285} [2022-11-18 20:30:42,667 INFO L288 CegarLoopForPetriNet]: 289 programPoint places, -3 predicate places. [2022-11-18 20:30:42,667 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 285 transitions, 600 flow [2022-11-18 20:30:42,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 281.0) internal successors, (562), 2 states have internal predecessors, (562), 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) [2022-11-18 20:30:42,668 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:42,668 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:42,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 20:30:42,669 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-18 20:30:42,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:42,670 INFO L85 PathProgramCache]: Analyzing trace with hash 2065534902, now seen corresponding path program 1 times [2022-11-18 20:30:42,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:42,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792667387] [2022-11-18 20:30:42,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:42,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:42,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:42,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792667387] [2022-11-18 20:30:42,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792667387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:30:42,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:30:42,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:30:42,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440921816] [2022-11-18 20:30:42,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:30:42,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:30:42,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:42,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:30:42,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:30:42,718 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 341 [2022-11-18 20:30:42,720 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 285 transitions, 600 flow. Second operand has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 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) [2022-11-18 20:30:42,720 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:42,720 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 341 [2022-11-18 20:30:42,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:42,881 INFO L130 PetriNetUnfolder]: 16/542 cut-off events. [2022-11-18 20:30:42,881 INFO L131 PetriNetUnfolder]: For 53/68 co-relation queries the response was YES. [2022-11-18 20:30:42,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 542 events. 16/542 cut-off events. For 53/68 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2442 event pairs, 1 based on Foata normal form. 0/512 useless extension candidates. Maximal degree in co-relation 592. Up to 23 conditions per place. [2022-11-18 20:30:42,893 INFO L137 encePairwiseOnDemand]: 338/341 looper letters, 15 selfloop transitions, 2 changer transitions 0/289 dead transitions. [2022-11-18 20:30:42,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 289 transitions, 642 flow [2022-11-18 20:30:42,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:30:42,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:30:42,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 837 transitions. [2022-11-18 20:30:42,896 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2022-11-18 20:30:42,896 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 837 transitions. [2022-11-18 20:30:42,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 837 transitions. [2022-11-18 20:30:42,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:42,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 837 transitions. [2022-11-18 20:30:42,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 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) [2022-11-18 20:30:42,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2022-11-18 20:30:42,901 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2022-11-18 20:30:42,902 INFO L175 Difference]: Start difference. First operand has 286 places, 285 transitions, 600 flow. Second operand 3 states and 837 transitions. [2022-11-18 20:30:42,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 289 transitions, 642 flow [2022-11-18 20:30:42,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 289 transitions, 642 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:30:42,909 INFO L231 Difference]: Finished difference. Result has 288 places, 286 transitions, 612 flow [2022-11-18 20:30:42,910 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=612, PETRI_PLACES=288, PETRI_TRANSITIONS=286} [2022-11-18 20:30:42,910 INFO L288 CegarLoopForPetriNet]: 289 programPoint places, -1 predicate places. [2022-11-18 20:30:42,911 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 286 transitions, 612 flow [2022-11-18 20:30:42,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 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) [2022-11-18 20:30:42,911 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:42,911 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:42,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 20:30:42,913 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-18 20:30:42,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:42,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1090393800, now seen corresponding path program 1 times [2022-11-18 20:30:42,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:42,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962969511] [2022-11-18 20:30:42,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:42,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:43,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:43,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962969511] [2022-11-18 20:30:43,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962969511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:43,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34543742] [2022-11-18 20:30:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:43,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:43,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:43,031 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:43,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:30:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:43,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:30:43,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:43,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:30:43,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:30:43,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34543742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:30:43,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:30:43,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-18 20:30:43,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977755788] [2022-11-18 20:30:43,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:30:43,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:30:43,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:43,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:30:43,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:30:43,214 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 341 [2022-11-18 20:30:43,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 286 transitions, 612 flow. Second operand has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 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) [2022-11-18 20:30:43,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:43,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 341 [2022-11-18 20:30:43,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:43,397 INFO L130 PetriNetUnfolder]: 14/497 cut-off events. [2022-11-18 20:30:43,397 INFO L131 PetriNetUnfolder]: For 62/152 co-relation queries the response was YES. [2022-11-18 20:30:43,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 497 events. 14/497 cut-off events. For 62/152 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2136 event pairs, 1 based on Foata normal form. 1/472 useless extension candidates. Maximal degree in co-relation 560. Up to 30 conditions per place. [2022-11-18 20:30:43,409 INFO L137 encePairwiseOnDemand]: 338/341 looper letters, 15 selfloop transitions, 2 changer transitions 0/290 dead transitions. [2022-11-18 20:30:43,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 290 transitions, 654 flow [2022-11-18 20:30:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:30:43,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:30:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 837 transitions. [2022-11-18 20:30:43,412 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2022-11-18 20:30:43,413 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 837 transitions. [2022-11-18 20:30:43,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 837 transitions. [2022-11-18 20:30:43,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:43,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 837 transitions. [2022-11-18 20:30:43,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 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) [2022-11-18 20:30:43,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2022-11-18 20:30:43,418 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2022-11-18 20:30:43,418 INFO L175 Difference]: Start difference. First operand has 288 places, 286 transitions, 612 flow. Second operand 3 states and 837 transitions. [2022-11-18 20:30:43,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 290 transitions, 654 flow [2022-11-18 20:30:43,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 290 transitions, 652 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:30:43,425 INFO L231 Difference]: Finished difference. Result has 290 places, 287 transitions, 622 flow [2022-11-18 20:30:43,426 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=622, PETRI_PLACES=290, PETRI_TRANSITIONS=287} [2022-11-18 20:30:43,427 INFO L288 CegarLoopForPetriNet]: 289 programPoint places, 1 predicate places. [2022-11-18 20:30:43,427 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 287 transitions, 622 flow [2022-11-18 20:30:43,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 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) [2022-11-18 20:30:43,428 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:43,428 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:43,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:43,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:30:43,634 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-18 20:30:43,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:43,635 INFO L85 PathProgramCache]: Analyzing trace with hash -430387013, now seen corresponding path program 1 times [2022-11-18 20:30:43,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:43,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753964325] [2022-11-18 20:30:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:43,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:30:43,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:43,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753964325] [2022-11-18 20:30:43,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753964325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:43,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460034047] [2022-11-18 20:30:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:43,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:43,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:43,722 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:43,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:30:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:43,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:30:43,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:30:43,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:30:43,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460034047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:43,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:43,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 20:30:43,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920049359] [2022-11-18 20:30:43,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:43,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:30:43,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:43,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:30:43,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:30:43,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 341 [2022-11-18 20:30:43,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 287 transitions, 622 flow. Second operand has 10 states, 10 states have (on average 274.1) internal successors, (2741), 10 states have internal predecessors, (2741), 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) [2022-11-18 20:30:43,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:43,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 341 [2022-11-18 20:30:43,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:44,185 INFO L130 PetriNetUnfolder]: 14/504 cut-off events. [2022-11-18 20:30:44,185 INFO L131 PetriNetUnfolder]: For 54/69 co-relation queries the response was YES. [2022-11-18 20:30:44,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 504 events. 14/504 cut-off events. For 54/69 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2133 event pairs, 1 based on Foata normal form. 2/483 useless extension candidates. Maximal degree in co-relation 575. Up to 20 conditions per place. [2022-11-18 20:30:44,198 INFO L137 encePairwiseOnDemand]: 335/341 looper letters, 16 selfloop transitions, 9 changer transitions 0/297 dead transitions. [2022-11-18 20:30:44,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 297 transitions, 694 flow [2022-11-18 20:30:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:30:44,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:30:44,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2475 transitions. [2022-11-18 20:30:44,204 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8064516129032258 [2022-11-18 20:30:44,206 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2475 transitions. [2022-11-18 20:30:44,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2475 transitions. [2022-11-18 20:30:44,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:44,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2475 transitions. [2022-11-18 20:30:44,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 275.0) internal successors, (2475), 9 states have internal predecessors, (2475), 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) [2022-11-18 20:30:44,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 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) [2022-11-18 20:30:44,221 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 341.0) internal successors, (3410), 10 states have internal predecessors, (3410), 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) [2022-11-18 20:30:44,221 INFO L175 Difference]: Start difference. First operand has 290 places, 287 transitions, 622 flow. Second operand 9 states and 2475 transitions. [2022-11-18 20:30:44,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 297 transitions, 694 flow [2022-11-18 20:30:44,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 297 transitions, 692 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:30:44,229 INFO L231 Difference]: Finished difference. Result has 300 places, 293 transitions, 670 flow [2022-11-18 20:30:44,229 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=670, PETRI_PLACES=300, PETRI_TRANSITIONS=293} [2022-11-18 20:30:44,230 INFO L288 CegarLoopForPetriNet]: 289 programPoint places, 11 predicate places. [2022-11-18 20:30:44,230 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 293 transitions, 670 flow [2022-11-18 20:30:44,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 274.1) internal successors, (2741), 10 states have internal predecessors, (2741), 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) [2022-11-18 20:30:44,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:44,232 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-11-18 20:30:44,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:44,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:30:44,438 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-18 20:30:44,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:44,439 INFO L85 PathProgramCache]: Analyzing trace with hash 487884667, now seen corresponding path program 2 times [2022-11-18 20:30:44,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:44,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703502179] [2022-11-18 20:30:44,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:44,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 20:30:44,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:44,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703502179] [2022-11-18 20:30:44,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703502179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:44,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363957662] [2022-11-18 20:30:44,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:30:44,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:44,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:44,551 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:44,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:30:44,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:30:44,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:44,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:30:44,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:30:44,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:30:45,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363957662] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:45,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:45,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-18 20:30:45,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487509929] [2022-11-18 20:30:45,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:45,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:30:45,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:45,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:30:45,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:30:45,016 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 341 [2022-11-18 20:30:45,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 293 transitions, 670 flow. Second operand has 19 states, 19 states have (on average 268.05263157894734) internal successors, (5093), 19 states have internal predecessors, (5093), 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) [2022-11-18 20:30:45,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:45,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 341 [2022-11-18 20:30:45,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:45,519 INFO L130 PetriNetUnfolder]: 12/479 cut-off events. [2022-11-18 20:30:45,519 INFO L131 PetriNetUnfolder]: For 65/87 co-relation queries the response was YES. [2022-11-18 20:30:45,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 479 events. 12/479 cut-off events. For 65/87 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1719 event pairs, 2 based on Foata normal form. 6/464 useless extension candidates. Maximal degree in co-relation 636. Up to 29 conditions per place. [2022-11-18 20:30:45,531 INFO L137 encePairwiseOnDemand]: 330/341 looper letters, 35 selfloop transitions, 26 changer transitions 0/325 dead transitions. [2022-11-18 20:30:45,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 325 transitions, 918 flow [2022-11-18 20:30:45,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:30:45,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-18 20:30:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6691 transitions. [2022-11-18 20:30:45,544 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7848680351906159 [2022-11-18 20:30:45,545 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6691 transitions. [2022-11-18 20:30:45,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6691 transitions. [2022-11-18 20:30:45,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:45,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6691 transitions. [2022-11-18 20:30:45,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 267.64) internal successors, (6691), 25 states have internal predecessors, (6691), 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) [2022-11-18 20:30:45,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 341.0) internal successors, (8866), 26 states have internal predecessors, (8866), 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) [2022-11-18 20:30:45,575 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 341.0) internal successors, (8866), 26 states have internal predecessors, (8866), 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) [2022-11-18 20:30:45,576 INFO L175 Difference]: Start difference. First operand has 300 places, 293 transitions, 670 flow. Second operand 25 states and 6691 transitions. [2022-11-18 20:30:45,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 325 transitions, 918 flow [2022-11-18 20:30:45,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 325 transitions, 904 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 20:30:45,590 INFO L231 Difference]: Finished difference. Result has 331 places, 309 transitions, 828 flow [2022-11-18 20:30:45,590 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=828, PETRI_PLACES=331, PETRI_TRANSITIONS=309} [2022-11-18 20:30:45,591 INFO L288 CegarLoopForPetriNet]: 289 programPoint places, 42 predicate places. [2022-11-18 20:30:45,592 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 309 transitions, 828 flow [2022-11-18 20:30:45,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 268.05263157894734) internal successors, (5093), 19 states have internal predecessors, (5093), 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) [2022-11-18 20:30:45,594 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:45,594 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:45,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:45,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:45,801 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-18 20:30:45,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:45,802 INFO L85 PathProgramCache]: Analyzing trace with hash 224215675, now seen corresponding path program 1 times [2022-11-18 20:30:45,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:45,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378835422] [2022-11-18 20:30:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:45,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:46,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:46,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378835422] [2022-11-18 20:30:46,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378835422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:46,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952817731] [2022-11-18 20:30:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:46,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:46,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:46,238 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:46,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:30:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:46,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:30:46,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:46,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:46,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952817731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:46,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:46,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-18 20:30:46,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055719251] [2022-11-18 20:30:46,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:46,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:30:46,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:46,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:30:46,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:30:46,807 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 341 [2022-11-18 20:30:46,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 309 transitions, 828 flow. Second operand has 23 states, 23 states have (on average 274.4347826086956) internal successors, (6312), 23 states have internal predecessors, (6312), 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) [2022-11-18 20:30:46,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:46,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 341 [2022-11-18 20:30:46,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:47,420 INFO L130 PetriNetUnfolder]: 12/494 cut-off events. [2022-11-18 20:30:47,420 INFO L131 PetriNetUnfolder]: For 169/173 co-relation queries the response was YES. [2022-11-18 20:30:47,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 494 events. 12/494 cut-off events. For 169/173 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1720 event pairs, 2 based on Foata normal form. 3/476 useless extension candidates. Maximal degree in co-relation 728. Up to 20 conditions per place. [2022-11-18 20:30:47,430 INFO L137 encePairwiseOnDemand]: 335/341 looper letters, 30 selfloop transitions, 30 changer transitions 0/335 dead transitions. [2022-11-18 20:30:47,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 335 transitions, 1094 flow [2022-11-18 20:30:47,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 20:30:47,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-18 20:30:47,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8223 transitions. [2022-11-18 20:30:47,442 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8038123167155425 [2022-11-18 20:30:47,443 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8223 transitions. [2022-11-18 20:30:47,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8223 transitions. [2022-11-18 20:30:47,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:47,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8223 transitions. [2022-11-18 20:30:47,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 274.1) internal successors, (8223), 30 states have internal predecessors, (8223), 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) [2022-11-18 20:30:47,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 341.0) internal successors, (10571), 31 states have internal predecessors, (10571), 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) [2022-11-18 20:30:47,478 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 341.0) internal successors, (10571), 31 states have internal predecessors, (10571), 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) [2022-11-18 20:30:47,478 INFO L175 Difference]: Start difference. First operand has 331 places, 309 transitions, 828 flow. Second operand 30 states and 8223 transitions. [2022-11-18 20:30:47,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 335 transitions, 1094 flow [2022-11-18 20:30:47,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 335 transitions, 1060 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-11-18 20:30:47,489 INFO L231 Difference]: Finished difference. Result has 357 places, 319 transitions, 952 flow [2022-11-18 20:30:47,490 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=952, PETRI_PLACES=357, PETRI_TRANSITIONS=319} [2022-11-18 20:30:47,491 INFO L288 CegarLoopForPetriNet]: 289 programPoint places, 68 predicate places. [2022-11-18 20:30:47,491 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 319 transitions, 952 flow [2022-11-18 20:30:47,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 274.4347826086956) internal successors, (6312), 23 states have internal predecessors, (6312), 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) [2022-11-18 20:30:47,493 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:47,493 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:47,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:47,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:47,707 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-18 20:30:47,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:47,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1330876867, now seen corresponding path program 2 times [2022-11-18 20:30:47,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:47,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333500678] [2022-11-18 20:30:47,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:47,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-18 20:30:48,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:48,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333500678] [2022-11-18 20:30:48,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333500678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:30:48,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:30:48,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 20:30:48,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942696765] [2022-11-18 20:30:48,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:30:48,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:30:48,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:48,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:30:48,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:30:48,258 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 341 [2022-11-18 20:30:48,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 319 transitions, 952 flow. Second operand has 11 states, 11 states have (on average 228.36363636363637) internal successors, (2512), 11 states have internal predecessors, (2512), 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) [2022-11-18 20:30:48,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:48,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 341 [2022-11-18 20:30:48,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:28,291 INFO L130 PetriNetUnfolder]: 56992/155129 cut-off events. [2022-11-18 20:31:28,291 INFO L131 PetriNetUnfolder]: For 5405/5405 co-relation queries the response was YES. [2022-11-18 20:31:29,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238758 conditions, 155129 events. 56992/155129 cut-off events. For 5405/5405 co-relation queries the response was YES. Maximal size of possible extension queue 4862. Compared 2295706 event pairs, 10814 based on Foata normal form. 0/150534 useless extension candidates. Maximal degree in co-relation 238735. Up to 28724 conditions per place. [2022-11-18 20:31:30,699 INFO L137 encePairwiseOnDemand]: 323/341 looper letters, 565 selfloop transitions, 111 changer transitions 0/935 dead transitions. [2022-11-18 20:31:30,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 935 transitions, 3814 flow [2022-11-18 20:31:30,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 20:31:30,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-18 20:31:30,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 8818 transitions. [2022-11-18 20:31:30,713 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7183121537960248 [2022-11-18 20:31:30,713 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 8818 transitions. [2022-11-18 20:31:30,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 8818 transitions. [2022-11-18 20:31:30,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:30,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 8818 transitions. [2022-11-18 20:31:30,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 244.94444444444446) internal successors, (8818), 36 states have internal predecessors, (8818), 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) [2022-11-18 20:31:30,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 341.0) internal successors, (12617), 37 states have internal predecessors, (12617), 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) [2022-11-18 20:31:30,752 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 341.0) internal successors, (12617), 37 states have internal predecessors, (12617), 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) [2022-11-18 20:31:30,752 INFO L175 Difference]: Start difference. First operand has 357 places, 319 transitions, 952 flow. Second operand 36 states and 8818 transitions. [2022-11-18 20:31:30,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 935 transitions, 3814 flow [2022-11-18 20:31:30,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 935 transitions, 3770 flow, removed 4 selfloop flow, removed 18 redundant places. [2022-11-18 20:31:30,783 INFO L231 Difference]: Finished difference. Result has 397 places, 463 transitions, 1759 flow [2022-11-18 20:31:30,784 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1759, PETRI_PLACES=397, PETRI_TRANSITIONS=463} [2022-11-18 20:31:30,784 INFO L288 CegarLoopForPetriNet]: 289 programPoint places, 108 predicate places. [2022-11-18 20:31:30,785 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 463 transitions, 1759 flow [2022-11-18 20:31:30,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 228.36363636363637) internal successors, (2512), 11 states have internal predecessors, (2512), 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) [2022-11-18 20:31:30,786 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:30,786 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:30,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-18 20:31:30,787 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-18 20:31:30,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:30,787 INFO L85 PathProgramCache]: Analyzing trace with hash -261593347, now seen corresponding path program 1 times [2022-11-18 20:31:30,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:30,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930727618] [2022-11-18 20:31:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:30,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:31:30,829 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:31:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:31:31,227 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:31:31,250 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:31:31,250 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-18 20:31:31,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-18 20:31:31,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-18 20:31:31,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-18 20:31:31,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-18 20:31:31,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-18 20:31:31,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-18 20:31:31,254 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2022-11-18 20:31:31,255 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:31:31,255 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-18 20:31:31,303 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-18 20:31:31,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 349 places, 413 transitions, 870 flow [2022-11-18 20:31:31,507 INFO L130 PetriNetUnfolder]: 157/910 cut-off events. [2022-11-18 20:31:31,508 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2022-11-18 20:31:31,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 910 events. 157/910 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4383 event pairs, 6 based on Foata normal form. 0/744 useless extension candidates. Maximal degree in co-relation 660. Up to 32 conditions per place. [2022-11-18 20:31:31,527 INFO L82 GeneralOperation]: Start removeDead. Operand has 349 places, 413 transitions, 870 flow [2022-11-18 20:31:31,535 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 349 places, 413 transitions, 870 flow [2022-11-18 20:31:31,536 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:31:31,537 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@5ed1e623, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:31:31,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-18 20:31:31,544 INFO L130 PetriNetUnfolder]: 14/136 cut-off events. [2022-11-18 20:31:31,544 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 20:31:31,544 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:31,544 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:31,545 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-18 20:31:31,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:31,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1410580652, now seen corresponding path program 1 times [2022-11-18 20:31:31,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:31,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426750375] [2022-11-18 20:31:31,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:31,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:31,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:31,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426750375] [2022-11-18 20:31:31,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426750375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:31,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:31,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:31:31,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847896488] [2022-11-18 20:31:31,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:31,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:31:31,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:31,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:31:31,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:31:31,567 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 413 [2022-11-18 20:31:31,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 413 transitions, 870 flow. Second operand has 2 states, 2 states have (on average 338.0) internal successors, (676), 2 states have internal predecessors, (676), 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) [2022-11-18 20:31:31,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:31,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 413 [2022-11-18 20:31:31,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:31,763 INFO L130 PetriNetUnfolder]: 31/775 cut-off events. [2022-11-18 20:31:31,763 INFO L131 PetriNetUnfolder]: For 132/164 co-relation queries the response was YES. [2022-11-18 20:31:31,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 775 events. 31/775 cut-off events. For 132/164 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3876 event pairs, 6 based on Foata normal form. 485/1215 useless extension candidates. Maximal degree in co-relation 574. Up to 37 conditions per place. [2022-11-18 20:31:31,777 INFO L137 encePairwiseOnDemand]: 350/413 looper letters, 8 selfloop transitions, 0 changer transitions 1/345 dead transitions. [2022-11-18 20:31:31,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 345 transitions, 750 flow [2022-11-18 20:31:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:31:31,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:31:31,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 745 transitions. [2022-11-18 20:31:31,779 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9019370460048426 [2022-11-18 20:31:31,780 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 745 transitions. [2022-11-18 20:31:31,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 745 transitions. [2022-11-18 20:31:31,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:31,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 745 transitions. [2022-11-18 20:31:31,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 372.5) internal successors, (745), 2 states have internal predecessors, (745), 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) [2022-11-18 20:31:31,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 413.0) internal successors, (1239), 3 states have internal predecessors, (1239), 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) [2022-11-18 20:31:31,784 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 413.0) internal successors, (1239), 3 states have internal predecessors, (1239), 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) [2022-11-18 20:31:31,784 INFO L175 Difference]: Start difference. First operand has 349 places, 413 transitions, 870 flow. Second operand 2 states and 745 transitions. [2022-11-18 20:31:31,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 345 transitions, 750 flow [2022-11-18 20:31:31,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 345 transitions, 750 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:31:31,792 INFO L231 Difference]: Finished difference. Result has 345 places, 344 transitions, 732 flow [2022-11-18 20:31:31,793 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=732, PETRI_PLACES=345, PETRI_TRANSITIONS=344} [2022-11-18 20:31:31,793 INFO L288 CegarLoopForPetriNet]: 349 programPoint places, -4 predicate places. [2022-11-18 20:31:31,794 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 344 transitions, 732 flow [2022-11-18 20:31:31,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 338.0) internal successors, (676), 2 states have internal predecessors, (676), 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) [2022-11-18 20:31:31,794 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:31,795 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:31,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-18 20:31:31,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-18 20:31:31,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:31,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1058585174, now seen corresponding path program 1 times [2022-11-18 20:31:31,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:31,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548134539] [2022-11-18 20:31:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:31,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:31,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:31,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548134539] [2022-11-18 20:31:31,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548134539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:31,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:31,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:31:31,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576831919] [2022-11-18 20:31:31,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:31,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:31:31,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:31,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:31:31,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:31:31,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 413 [2022-11-18 20:31:31,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 344 transitions, 732 flow. Second operand has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 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) [2022-11-18 20:31:31,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:31,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 413 [2022-11-18 20:31:31,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:32,071 INFO L130 PetriNetUnfolder]: 31/778 cut-off events. [2022-11-18 20:31:32,071 INFO L131 PetriNetUnfolder]: For 132/164 co-relation queries the response was YES. [2022-11-18 20:31:32,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 778 events. 31/778 cut-off events. For 132/164 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3873 event pairs, 6 based on Foata normal form. 0/734 useless extension candidates. Maximal degree in co-relation 875. Up to 44 conditions per place. [2022-11-18 20:31:32,092 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 17 selfloop transitions, 2 changer transitions 0/348 dead transitions. [2022-11-18 20:31:32,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 348 transitions, 778 flow [2022-11-18 20:31:32,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:31:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:31:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1010 transitions. [2022-11-18 20:31:32,095 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8151735270379338 [2022-11-18 20:31:32,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1010 transitions. [2022-11-18 20:31:32,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1010 transitions. [2022-11-18 20:31:32,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:32,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1010 transitions. [2022-11-18 20:31:32,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 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) [2022-11-18 20:31:32,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 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) [2022-11-18 20:31:32,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 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) [2022-11-18 20:31:32,100 INFO L175 Difference]: Start difference. First operand has 345 places, 344 transitions, 732 flow. Second operand 3 states and 1010 transitions. [2022-11-18 20:31:32,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 348 transitions, 778 flow [2022-11-18 20:31:32,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 348 transitions, 778 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:31:32,108 INFO L231 Difference]: Finished difference. Result has 347 places, 345 transitions, 744 flow [2022-11-18 20:31:32,109 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=744, PETRI_PLACES=347, PETRI_TRANSITIONS=345} [2022-11-18 20:31:32,109 INFO L288 CegarLoopForPetriNet]: 349 programPoint places, -2 predicate places. [2022-11-18 20:31:32,109 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 345 transitions, 744 flow [2022-11-18 20:31:32,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 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) [2022-11-18 20:31:32,110 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:32,110 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:32,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-18 20:31:32,111 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-18 20:31:32,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:32,111 INFO L85 PathProgramCache]: Analyzing trace with hash 334908661, now seen corresponding path program 1 times [2022-11-18 20:31:32,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:32,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641025828] [2022-11-18 20:31:32,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:32,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:32,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:32,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641025828] [2022-11-18 20:31:32,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641025828] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:32,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905905606] [2022-11-18 20:31:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:32,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:32,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:32,175 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:32,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:31:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:32,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:31:32,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:31:32,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:31:32,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905905606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:32,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:31:32,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-18 20:31:32,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198234327] [2022-11-18 20:31:32,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:32,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:31:32,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:32,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:31:32,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:31:32,364 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 413 [2022-11-18 20:31:32,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 345 transitions, 744 flow. Second operand has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 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) [2022-11-18 20:31:32,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:32,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 413 [2022-11-18 20:31:32,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:32,603 INFO L130 PetriNetUnfolder]: 29/733 cut-off events. [2022-11-18 20:31:32,603 INFO L131 PetriNetUnfolder]: For 167/359 co-relation queries the response was YES. [2022-11-18 20:31:32,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 733 events. 29/733 cut-off events. For 167/359 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3558 event pairs, 6 based on Foata normal form. 1/694 useless extension candidates. Maximal degree in co-relation 848. Up to 56 conditions per place. [2022-11-18 20:31:32,625 INFO L137 encePairwiseOnDemand]: 410/413 looper letters, 17 selfloop transitions, 2 changer transitions 0/349 dead transitions. [2022-11-18 20:31:32,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 349 transitions, 790 flow [2022-11-18 20:31:32,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:31:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:31:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1010 transitions. [2022-11-18 20:31:32,628 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8151735270379338 [2022-11-18 20:31:32,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1010 transitions. [2022-11-18 20:31:32,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1010 transitions. [2022-11-18 20:31:32,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:32,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1010 transitions. [2022-11-18 20:31:32,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 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) [2022-11-18 20:31:32,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 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) [2022-11-18 20:31:32,634 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 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) [2022-11-18 20:31:32,634 INFO L175 Difference]: Start difference. First operand has 347 places, 345 transitions, 744 flow. Second operand 3 states and 1010 transitions. [2022-11-18 20:31:32,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 349 transitions, 790 flow [2022-11-18 20:31:32,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 349 transitions, 788 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:31:32,643 INFO L231 Difference]: Finished difference. Result has 349 places, 346 transitions, 754 flow [2022-11-18 20:31:32,643 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=754, PETRI_PLACES=349, PETRI_TRANSITIONS=346} [2022-11-18 20:31:32,644 INFO L288 CegarLoopForPetriNet]: 349 programPoint places, 0 predicate places. [2022-11-18 20:31:32,644 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 346 transitions, 754 flow [2022-11-18 20:31:32,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 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) [2022-11-18 20:31:32,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:32,645 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:32,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:32,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 20:31:32,851 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-18 20:31:32,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:32,852 INFO L85 PathProgramCache]: Analyzing trace with hash 2095939486, now seen corresponding path program 1 times [2022-11-18 20:31:32,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:32,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55341524] [2022-11-18 20:31:32,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:32,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:31:32,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:32,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55341524] [2022-11-18 20:31:32,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55341524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:32,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368762171] [2022-11-18 20:31:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:32,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:32,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:32,913 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:32,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:31:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:33,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:31:33,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:31:33,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:31:33,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368762171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:33,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:33,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 20:31:33,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116620056] [2022-11-18 20:31:33,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:33,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:31:33,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:33,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:31:33,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:31:33,129 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 413 [2022-11-18 20:31:33,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 346 transitions, 754 flow. Second operand has 10 states, 10 states have (on average 331.1) internal successors, (3311), 10 states have internal predecessors, (3311), 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) [2022-11-18 20:31:33,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:33,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 413 [2022-11-18 20:31:33,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:33,385 INFO L130 PetriNetUnfolder]: 29/740 cut-off events. [2022-11-18 20:31:33,385 INFO L131 PetriNetUnfolder]: For 133/165 co-relation queries the response was YES. [2022-11-18 20:31:33,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870 conditions, 740 events. 29/740 cut-off events. For 133/165 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3556 event pairs, 6 based on Foata normal form. 2/706 useless extension candidates. Maximal degree in co-relation 860. Up to 41 conditions per place. [2022-11-18 20:31:33,404 INFO L137 encePairwiseOnDemand]: 407/413 looper letters, 18 selfloop transitions, 9 changer transitions 0/356 dead transitions. [2022-11-18 20:31:33,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 356 transitions, 830 flow [2022-11-18 20:31:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:31:33,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:31:33,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2990 transitions. [2022-11-18 20:31:33,408 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8044121603443637 [2022-11-18 20:31:33,408 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2990 transitions. [2022-11-18 20:31:33,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2990 transitions. [2022-11-18 20:31:33,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:33,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2990 transitions. [2022-11-18 20:31:33,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 332.22222222222223) internal successors, (2990), 9 states have internal predecessors, (2990), 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) [2022-11-18 20:31:33,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 413.0) internal successors, (4130), 10 states have internal predecessors, (4130), 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) [2022-11-18 20:31:33,419 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 413.0) internal successors, (4130), 10 states have internal predecessors, (4130), 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) [2022-11-18 20:31:33,419 INFO L175 Difference]: Start difference. First operand has 349 places, 346 transitions, 754 flow. Second operand 9 states and 2990 transitions. [2022-11-18 20:31:33,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 356 transitions, 830 flow [2022-11-18 20:31:33,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 356 transitions, 828 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:31:33,426 INFO L231 Difference]: Finished difference. Result has 359 places, 352 transitions, 802 flow [2022-11-18 20:31:33,427 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=802, PETRI_PLACES=359, PETRI_TRANSITIONS=352} [2022-11-18 20:31:33,427 INFO L288 CegarLoopForPetriNet]: 349 programPoint places, 10 predicate places. [2022-11-18 20:31:33,428 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 352 transitions, 802 flow [2022-11-18 20:31:33,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 331.1) internal successors, (3311), 10 states have internal predecessors, (3311), 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) [2022-11-18 20:31:33,429 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:33,429 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-11-18 20:31:33,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:33,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 20:31:33,635 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-18 20:31:33,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:33,635 INFO L85 PathProgramCache]: Analyzing trace with hash -806123458, now seen corresponding path program 2 times [2022-11-18 20:31:33,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:33,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985341594] [2022-11-18 20:31:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:33,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 20:31:33,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:33,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985341594] [2022-11-18 20:31:33,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985341594] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:33,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202026538] [2022-11-18 20:31:33,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:31:33,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:33,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:33,732 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:33,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:31:33,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:31:33,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:31:33,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:31:33,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:31:33,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:31:34,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202026538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:34,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:34,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-18 20:31:34,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941248501] [2022-11-18 20:31:34,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:34,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:31:34,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:34,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:31:34,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:31:34,100 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 413 [2022-11-18 20:31:34,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 352 transitions, 802 flow. Second operand has 19 states, 19 states have (on average 325.05263157894734) internal successors, (6176), 19 states have internal predecessors, (6176), 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) [2022-11-18 20:31:34,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:34,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 413 [2022-11-18 20:31:34,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:34,735 INFO L130 PetriNetUnfolder]: 27/715 cut-off events. [2022-11-18 20:31:34,735 INFO L131 PetriNetUnfolder]: For 176/313 co-relation queries the response was YES. [2022-11-18 20:31:34,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 715 events. 27/715 cut-off events. For 176/313 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3246 event pairs, 7 based on Foata normal form. 6/687 useless extension candidates. Maximal degree in co-relation 927. Up to 56 conditions per place. [2022-11-18 20:31:34,753 INFO L137 encePairwiseOnDemand]: 402/413 looper letters, 37 selfloop transitions, 26 changer transitions 0/384 dead transitions. [2022-11-18 20:31:34,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 384 transitions, 1054 flow [2022-11-18 20:31:34,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:31:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-18 20:31:34,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 8118 transitions. [2022-11-18 20:31:34,762 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7862469733656174 [2022-11-18 20:31:34,763 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 8118 transitions. [2022-11-18 20:31:34,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 8118 transitions. [2022-11-18 20:31:34,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:34,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 8118 transitions. [2022-11-18 20:31:34,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 324.72) internal successors, (8118), 25 states have internal predecessors, (8118), 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) [2022-11-18 20:31:34,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 413.0) internal successors, (10738), 26 states have internal predecessors, (10738), 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) [2022-11-18 20:31:34,788 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 413.0) internal successors, (10738), 26 states have internal predecessors, (10738), 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) [2022-11-18 20:31:34,789 INFO L175 Difference]: Start difference. First operand has 359 places, 352 transitions, 802 flow. Second operand 25 states and 8118 transitions. [2022-11-18 20:31:34,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 384 transitions, 1054 flow [2022-11-18 20:31:34,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 384 transitions, 1040 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-18 20:31:34,796 INFO L231 Difference]: Finished difference. Result has 390 places, 368 transitions, 960 flow [2022-11-18 20:31:34,797 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=960, PETRI_PLACES=390, PETRI_TRANSITIONS=368} [2022-11-18 20:31:34,798 INFO L288 CegarLoopForPetriNet]: 349 programPoint places, 41 predicate places. [2022-11-18 20:31:34,798 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 368 transitions, 960 flow [2022-11-18 20:31:34,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 325.05263157894734) internal successors, (6176), 19 states have internal predecessors, (6176), 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) [2022-11-18 20:31:34,799 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:34,799 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:34,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:35,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 20:31:35,005 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-18 20:31:35,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:35,005 INFO L85 PathProgramCache]: Analyzing trace with hash 986677627, now seen corresponding path program 1 times [2022-11-18 20:31:35,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:35,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716102947] [2022-11-18 20:31:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:35,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:35,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:35,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716102947] [2022-11-18 20:31:35,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716102947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:35,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162135565] [2022-11-18 20:31:35,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:35,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:35,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:35,299 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:35,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:31:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:35,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:31:35,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:35,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:35,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162135565] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:35,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:35,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-18 20:31:35,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071389123] [2022-11-18 20:31:35,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:35,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:31:35,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:35,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:31:35,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:31:35,791 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 413 [2022-11-18 20:31:35,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 368 transitions, 960 flow. Second operand has 23 states, 23 states have (on average 331.4347826086956) internal successors, (7623), 23 states have internal predecessors, (7623), 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) [2022-11-18 20:31:35,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:35,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 413 [2022-11-18 20:31:35,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:36,343 INFO L130 PetriNetUnfolder]: 27/730 cut-off events. [2022-11-18 20:31:36,343 INFO L131 PetriNetUnfolder]: For 250/267 co-relation queries the response was YES. [2022-11-18 20:31:36,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1037 conditions, 730 events. 27/730 cut-off events. For 250/267 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3227 event pairs, 7 based on Foata normal form. 3/699 useless extension candidates. Maximal degree in co-relation 1017. Up to 41 conditions per place. [2022-11-18 20:31:36,363 INFO L137 encePairwiseOnDemand]: 407/413 looper letters, 32 selfloop transitions, 30 changer transitions 0/394 dead transitions. [2022-11-18 20:31:36,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 394 transitions, 1230 flow [2022-11-18 20:31:36,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 20:31:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-18 20:31:36,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 9935 transitions. [2022-11-18 20:31:36,373 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8018563357546409 [2022-11-18 20:31:36,374 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 9935 transitions. [2022-11-18 20:31:36,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 9935 transitions. [2022-11-18 20:31:36,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:36,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 9935 transitions. [2022-11-18 20:31:36,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 331.1666666666667) internal successors, (9935), 30 states have internal predecessors, (9935), 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) [2022-11-18 20:31:36,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 413.0) internal successors, (12803), 31 states have internal predecessors, (12803), 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) [2022-11-18 20:31:36,403 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 413.0) internal successors, (12803), 31 states have internal predecessors, (12803), 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) [2022-11-18 20:31:36,404 INFO L175 Difference]: Start difference. First operand has 390 places, 368 transitions, 960 flow. Second operand 30 states and 9935 transitions. [2022-11-18 20:31:36,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 394 transitions, 1230 flow [2022-11-18 20:31:36,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 394 transitions, 1196 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-11-18 20:31:36,414 INFO L231 Difference]: Finished difference. Result has 416 places, 378 transitions, 1084 flow [2022-11-18 20:31:36,415 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1084, PETRI_PLACES=416, PETRI_TRANSITIONS=378} [2022-11-18 20:31:36,415 INFO L288 CegarLoopForPetriNet]: 349 programPoint places, 67 predicate places. [2022-11-18 20:31:36,415 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 378 transitions, 1084 flow [2022-11-18 20:31:36,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 331.4347826086956) internal successors, (7623), 23 states have internal predecessors, (7623), 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) [2022-11-18 20:31:36,417 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:36,418 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:36,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:36,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_395a4056-fb8e-4852-a38d-187a925a4c0b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 20:31:36,624 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-18 20:31:36,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:36,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1128593146, now seen corresponding path program 2 times [2022-11-18 20:31:36,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:36,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902229237] [2022-11-18 20:31:36,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:36,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-18 20:31:37,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:37,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902229237] [2022-11-18 20:31:37,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902229237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:37,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:37,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 20:31:37,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910442171] [2022-11-18 20:31:37,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:37,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:31:37,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:37,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:31:37,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:31:37,203 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 413 [2022-11-18 20:31:37,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 378 transitions, 1084 flow. Second operand has 11 states, 11 states have (on average 279.3636363636364) internal successors, (3073), 11 states have internal predecessors, (3073), 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) [2022-11-18 20:31:37,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:37,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 413 [2022-11-18 20:31:37,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand