./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R --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 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa --- 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-38b53e6 [2022-11-25 15:28:14,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:28:14,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:28:14,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:28:14,454 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:28:14,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:28:14,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:28:14,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:28:14,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:28:14,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:28:14,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:28:14,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:28:14,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:28:14,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:28:14,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:28:14,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:28:14,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:28:14,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:28:14,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:28:14,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:28:14,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:28:14,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:28:14,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:28:14,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:28:14,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:28:14,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:28:14,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:28:14,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:28:14,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:28:14,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:28:14,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:28:14,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:28:14,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:28:14,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:28:14,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:28:14,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:28:14,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:28:14,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:28:14,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:28:14,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:28:14,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:28:14,494 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:28:14,518 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:28:14,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:28:14,519 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:28:14,519 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:28:14,520 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:28:14,520 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:28:14,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:28:14,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:28:14,521 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:28:14,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:28:14,522 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:28:14,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:28:14,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:28:14,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:28:14,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:28:14,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:28:14,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:28:14,523 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:28:14,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:28:14,524 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:28:14,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:28:14,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:28:14,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:28:14,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:28:14,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:28:14,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:28:14,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:28:14,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:28:14,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:28:14,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:28:14,526 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:28:14,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:28:14,527 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:28:14,527 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:28:14,527 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa [2022-11-25 15:28:14,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:28:14,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:28:14,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:28:14,778 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:28:14,779 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:28:14,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2022-11-25 15:28:17,823 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:28:18,146 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:28:18,153 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2022-11-25 15:28:18,175 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/data/019b23ae9/658814f4314544aa92040791de120637/FLAG4e2c26a82 [2022-11-25 15:28:18,189 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/data/019b23ae9/658814f4314544aa92040791de120637 [2022-11-25 15:28:18,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:28:18,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:28:18,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:28:18,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:28:18,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:28:18,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:28:18" (1/1) ... [2022-11-25 15:28:18,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50129bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:28:18, skipping insertion in model container [2022-11-25 15:28:18,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:28:18" (1/1) ... [2022-11-25 15:28:18,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:28:18,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:28:18,767 WARN L237 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_66ac51f2-8952-4d01-b7e3-5c671fd5032c/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2022-11-25 15:28:18,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:28:18,928 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:28:18,986 WARN L237 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_66ac51f2-8952-4d01-b7e3-5c671fd5032c/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2022-11-25 15:28:19,008 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:28:19,090 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:28:19,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:28:19 WrapperNode [2022-11-25 15:28:19,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:28:19,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:28:19,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:28:19,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:28:19,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:28:19" (1/1) ... [2022-11-25 15:28:19,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:28:19" (1/1) ... [2022-11-25 15:28:19,167 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 224 [2022-11-25 15:28:19,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:28:19,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:28:19,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:28:19,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:28:19,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:28:19" (1/1) ... [2022-11-25 15:28:19,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:28:19" (1/1) ... [2022-11-25 15:28:19,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:28:19" (1/1) ... [2022-11-25 15:28:19,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:28:19" (1/1) ... [2022-11-25 15:28:19,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:28:19" (1/1) ... [2022-11-25 15:28:19,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:28:19" (1/1) ... [2022-11-25 15:28:19,212 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:28:19" (1/1) ... [2022-11-25 15:28:19,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:28:19" (1/1) ... [2022-11-25 15:28:19,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:28:19,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:28:19,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:28:19,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:28:19,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:28:19" (1/1) ... [2022-11-25 15:28:19,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:28:19,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:28:19,252 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:28:19,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:28:19,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:28:19,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 15:28:19,314 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-11-25 15:28:19,315 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-11-25 15:28:19,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:28:19,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:28:19,317 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-11-25 15:28:19,317 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-11-25 15:28:19,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:28:19,317 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 15:28:19,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 15:28:19,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:28:19,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 15:28:19,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:28:19,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:28:19,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:28:19,320 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 15:28:19,484 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:28:19,487 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:28:19,960 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:28:19,970 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:28:19,979 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-25 15:28:19,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:28:19 BoogieIcfgContainer [2022-11-25 15:28:19,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:28:19,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:28:19,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:28:19,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:28:19,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:28:18" (1/3) ... [2022-11-25 15:28:19,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6245f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:28:19, skipping insertion in model container [2022-11-25 15:28:19,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:28:19" (2/3) ... [2022-11-25 15:28:19,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6245f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:28:19, skipping insertion in model container [2022-11-25 15:28:19,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:28:19" (3/3) ... [2022-11-25 15:28:19,995 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2022-11-25 15:28:20,004 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 15:28:20,015 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:28:20,015 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:28:20,015 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:28:20,166 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 15:28:20,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 238 transitions, 498 flow [2022-11-25 15:28:20,372 INFO L130 PetriNetUnfolder]: 54/440 cut-off events. [2022-11-25 15:28:20,372 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-25 15:28:20,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 440 events. 54/440 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1753 event pairs, 0 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 226. Up to 8 conditions per place. [2022-11-25 15:28:20,387 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 238 transitions, 498 flow [2022-11-25 15:28:20,394 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 236 transitions, 488 flow [2022-11-25 15:28:20,398 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:28:20,413 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 236 transitions, 488 flow [2022-11-25 15:28:20,415 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 236 transitions, 488 flow [2022-11-25 15:28:20,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 236 transitions, 488 flow [2022-11-25 15:28:20,493 INFO L130 PetriNetUnfolder]: 50/428 cut-off events. [2022-11-25 15:28:20,494 INFO L131 PetriNetUnfolder]: For 4/8 co-relation queries the response was YES. [2022-11-25 15:28:20,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 428 events. 50/428 cut-off events. For 4/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1680 event pairs, 0 based on Foata normal form. 0/364 useless extension candidates. Maximal degree in co-relation 214. Up to 8 conditions per place. [2022-11-25 15:28:20,511 INFO L119 LiptonReduction]: Number of co-enabled transitions 16560 [2022-11-25 15:28:41,179 INFO L134 LiptonReduction]: Checked pairs total: 25337 [2022-11-25 15:28:41,179 INFO L136 LiptonReduction]: Total number of compositions: 201 [2022-11-25 15:28:41,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:28:41,210 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;@64e4547e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:28:41,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 15:28:41,217 INFO L130 PetriNetUnfolder]: 1/20 cut-off events. [2022-11-25 15:28:41,217 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:28:41,218 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:28:41,219 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-25 15:28:41,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:28:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:28:41,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1665815171, now seen corresponding path program 1 times [2022-11-25 15:28:41,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:28:41,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673076966] [2022-11-25 15:28:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:28:41,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:28:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:28:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:28:41,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:28:41,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673076966] [2022-11-25 15:28:41,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673076966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:28:41,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:28:41,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:28:41,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002301775] [2022-11-25 15:28:41,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:28:41,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:28:41,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:28:41,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:28:41,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:28:41,675 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 439 [2022-11-25 15:28:41,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 65 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:28:41,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:28:41,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 439 [2022-11-25 15:28:41,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:28:42,573 INFO L130 PetriNetUnfolder]: 2945/4945 cut-off events. [2022-11-25 15:28:42,573 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-11-25 15:28:42,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9640 conditions, 4945 events. 2945/4945 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 28061 event pairs, 2736 based on Foata normal form. 249/4347 useless extension candidates. Maximal degree in co-relation 8599. Up to 4624 conditions per place. [2022-11-25 15:28:42,595 INFO L137 encePairwiseOnDemand]: 425/439 looper letters, 46 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2022-11-25 15:28:42,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 222 flow [2022-11-25 15:28:42,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:28:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:28:42,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 690 transitions. [2022-11-25 15:28:42,611 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5239179954441914 [2022-11-25 15:28:42,612 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 690 transitions. [2022-11-25 15:28:42,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 690 transitions. [2022-11-25 15:28:42,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:28:42,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 690 transitions. [2022-11-25 15:28:42,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:28:42,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 439.0) internal successors, (1756), 4 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:28:42,633 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 439.0) internal successors, (1756), 4 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:28:42,635 INFO L175 Difference]: Start difference. First operand has 54 places, 65 transitions, 146 flow. Second operand 3 states and 690 transitions. [2022-11-25 15:28:42,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 222 flow [2022-11-25 15:28:42,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 222 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:28:42,646 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 136 flow [2022-11-25 15:28:42,648 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=439, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2022-11-25 15:28:42,651 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2022-11-25 15:28:42,652 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 136 flow [2022-11-25 15:28:42,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:28:42,654 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:28:42,654 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-25 15:28:42,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:28:42,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:28:42,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:28:42,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1613844436, now seen corresponding path program 1 times [2022-11-25 15:28:42,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:28:42,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139309112] [2022-11-25 15:28:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:28:42,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:28:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:28:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:28:42,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:28:42,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139309112] [2022-11-25 15:28:42,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139309112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:28:42,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027767577] [2022-11-25 15:28:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:28:42,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:28:42,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:28:42,851 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:28:42,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:28:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:28:42,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:28:42,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:28:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:28:43,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:28:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:28:43,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027767577] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:28:43,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:28:43,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 15:28:43,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053550744] [2022-11-25 15:28:43,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:28:43,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:28:43,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:28:43,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:28:43,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:28:43,085 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 439 [2022-11-25 15:28:43,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 136 flow. Second operand has 7 states, 7 states have (on average 210.57142857142858) internal successors, (1474), 7 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:28:43,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:28:43,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 439 [2022-11-25 15:28:43,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:28:43,915 INFO L130 PetriNetUnfolder]: 2945/4948 cut-off events. [2022-11-25 15:28:43,915 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-11-25 15:28:43,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9656 conditions, 4948 events. 2945/4948 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 28056 event pairs, 2736 based on Foata normal form. 0/4101 useless extension candidates. Maximal degree in co-relation 9643. Up to 4624 conditions per place. [2022-11-25 15:28:43,936 INFO L137 encePairwiseOnDemand]: 436/439 looper letters, 46 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2022-11-25 15:28:43,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 58 transitions, 250 flow [2022-11-25 15:28:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:28:43,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:28:43,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1308 transitions. [2022-11-25 15:28:43,943 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49658314350797267 [2022-11-25 15:28:43,943 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1308 transitions. [2022-11-25 15:28:43,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1308 transitions. [2022-11-25 15:28:43,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:28:43,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1308 transitions. [2022-11-25 15:28:43,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 218.0) internal successors, (1308), 6 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:28:43,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 439.0) internal successors, (3073), 7 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) [2022-11-25 15:28:43,953 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 439.0) internal successors, (3073), 7 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) [2022-11-25 15:28:43,954 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 136 flow. Second operand 6 states and 1308 transitions. [2022-11-25 15:28:43,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 58 transitions, 250 flow [2022-11-25 15:28:43,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 58 transitions, 246 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 15:28:43,958 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 168 flow [2022-11-25 15:28:43,958 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=439, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=168, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2022-11-25 15:28:43,959 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2022-11-25 15:28:43,959 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 168 flow [2022-11-25 15:28:43,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 210.57142857142858) internal successors, (1474), 7 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:28:43,960 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:28:43,960 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-11-25 15:28:43,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:28:44,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:28:44,168 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:28:44,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:28:44,168 INFO L85 PathProgramCache]: Analyzing trace with hash 473456957, now seen corresponding path program 2 times [2022-11-25 15:28:44,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:28:44,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954116676] [2022-11-25 15:28:44,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:28:44,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:28:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:28:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:28:44,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:28:44,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954116676] [2022-11-25 15:28:44,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954116676] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:28:44,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666757864] [2022-11-25 15:28:44,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:28:44,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:28:44,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:28:44,422 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:28:44,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:28:44,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:28:44,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:28:44,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:28:44,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:28:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:28:44,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:28:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:28:44,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666757864] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:28:44,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:28:44,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 15:28:44,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931167098] [2022-11-25 15:28:44,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:28:44,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 15:28:44,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:28:44,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 15:28:44,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 15:28:44,795 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 439 [2022-11-25 15:28:44,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 168 flow. Second operand has 13 states, 13 states have (on average 210.30769230769232) internal successors, (2734), 13 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:28:44,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:28:44,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 439 [2022-11-25 15:28:44,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:28:45,667 INFO L130 PetriNetUnfolder]: 2945/4954 cut-off events. [2022-11-25 15:28:45,667 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2022-11-25 15:28:45,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9693 conditions, 4954 events. 2945/4954 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 28083 event pairs, 2736 based on Foata normal form. 6/4114 useless extension candidates. Maximal degree in co-relation 9634. Up to 4624 conditions per place. [2022-11-25 15:28:45,691 INFO L137 encePairwiseOnDemand]: 436/439 looper letters, 46 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2022-11-25 15:28:45,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 64 transitions, 318 flow [2022-11-25 15:28:45,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:28:45,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 15:28:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2571 transitions. [2022-11-25 15:28:45,698 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4880410022779043 [2022-11-25 15:28:45,698 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2571 transitions. [2022-11-25 15:28:45,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2571 transitions. [2022-11-25 15:28:45,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:28:45,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2571 transitions. [2022-11-25 15:28:45,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 214.25) internal successors, (2571), 12 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:28:45,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 439.0) internal successors, (5707), 13 states have internal predecessors, (5707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:28:45,719 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 439.0) internal successors, (5707), 13 states have internal predecessors, (5707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:28:45,719 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 168 flow. Second operand 12 states and 2571 transitions. [2022-11-25 15:28:45,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 64 transitions, 318 flow [2022-11-25 15:28:45,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 64 transitions, 304 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 15:28:45,723 INFO L231 Difference]: Finished difference. Result has 80 places, 64 transitions, 238 flow [2022-11-25 15:28:45,723 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=439, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=238, PETRI_PLACES=80, PETRI_TRANSITIONS=64} [2022-11-25 15:28:45,724 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 26 predicate places. [2022-11-25 15:28:45,724 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 64 transitions, 238 flow [2022-11-25 15:28:45,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 210.30769230769232) internal successors, (2734), 13 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:28:45,726 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:28:45,726 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-11-25 15:28:45,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:28:45,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:28:45,932 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:28:45,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:28:45,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1483232547, now seen corresponding path program 3 times [2022-11-25 15:28:45,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:28:45,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882371905] [2022-11-25 15:28:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:28:45,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:28:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:28:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:28:46,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:28:46,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882371905] [2022-11-25 15:28:46,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882371905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:28:46,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696153730] [2022-11-25 15:28:46,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:28:46,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:28:46,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:28:46,490 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:28:46,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:32:40,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 15:32:40,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:32:40,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:32:40,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:32:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:32:40,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:32:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:32:41,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696153730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:32:41,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:32:41,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-25 15:32:41,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527122796] [2022-11-25 15:32:41,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:32:41,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 15:32:41,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:41,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 15:32:41,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-25 15:32:41,375 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 439 [2022-11-25 15:32:41,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 64 transitions, 238 flow. Second operand has 25 states, 25 states have (on average 210.16) internal successors, (5254), 25 states have internal predecessors, (5254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:41,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:41,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 439 [2022-11-25 15:32:41,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:42,393 INFO L130 PetriNetUnfolder]: 2945/4966 cut-off events. [2022-11-25 15:32:42,393 INFO L131 PetriNetUnfolder]: For 568/568 co-relation queries the response was YES. [2022-11-25 15:32:42,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9777 conditions, 4966 events. 2945/4966 cut-off events. For 568/568 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 28040 event pairs, 2736 based on Foata normal form. 12/4132 useless extension candidates. Maximal degree in co-relation 9640. Up to 4624 conditions per place. [2022-11-25 15:32:42,428 INFO L137 encePairwiseOnDemand]: 436/439 looper letters, 46 selfloop transitions, 23 changer transitions 0/76 dead transitions. [2022-11-25 15:32:42,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 76 transitions, 472 flow [2022-11-25 15:32:42,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 15:32:42,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 15:32:42,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5097 transitions. [2022-11-25 15:32:42,442 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48376993166287013 [2022-11-25 15:32:42,442 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5097 transitions. [2022-11-25 15:32:42,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5097 transitions. [2022-11-25 15:32:42,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:42,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5097 transitions. [2022-11-25 15:32:42,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 212.375) internal successors, (5097), 24 states have internal predecessors, (5097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:42,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 439.0) internal successors, (10975), 25 states have internal predecessors, (10975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:42,474 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 439.0) internal successors, (10975), 25 states have internal predecessors, (10975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:42,475 INFO L175 Difference]: Start difference. First operand has 80 places, 64 transitions, 238 flow. Second operand 24 states and 5097 transitions. [2022-11-25 15:32:42,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 76 transitions, 472 flow [2022-11-25 15:32:42,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 76 transitions, 400 flow, removed 31 selfloop flow, removed 5 redundant places. [2022-11-25 15:32:42,484 INFO L231 Difference]: Finished difference. Result has 110 places, 76 transitions, 358 flow [2022-11-25 15:32:42,484 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=439, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=358, PETRI_PLACES=110, PETRI_TRANSITIONS=76} [2022-11-25 15:32:42,486 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 56 predicate places. [2022-11-25 15:32:42,486 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 76 transitions, 358 flow [2022-11-25 15:32:42,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 210.16) internal successors, (5254), 25 states have internal predecessors, (5254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:42,490 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:42,490 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1] [2022-11-25 15:32:42,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:32:42,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:42,703 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:32:42,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:42,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1977674211, now seen corresponding path program 4 times [2022-11-25 15:32:42,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:42,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343509121] [2022-11-25 15:32:42,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:42,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:32:44,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:44,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343509121] [2022-11-25 15:32:44,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343509121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:32:44,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245192687] [2022-11-25 15:32:44,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:32:44,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:44,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:32:44,455 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:32:44,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:32:44,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:32:44,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:32:44,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 1569 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 15:32:44,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:32:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:32:45,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:32:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:32:45,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245192687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:32:45,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:32:45,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-25 15:32:45,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133647741] [2022-11-25 15:32:45,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:32:45,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-25 15:32:45,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:32:45,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-25 15:32:45,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 15:32:46,274 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 439 [2022-11-25 15:32:46,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 76 transitions, 358 flow. Second operand has 49 states, 49 states have (on average 210.08163265306123) internal successors, (10294), 49 states have internal predecessors, (10294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:46,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:32:46,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 439 [2022-11-25 15:32:46,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:32:47,590 INFO L130 PetriNetUnfolder]: 2945/4990 cut-off events. [2022-11-25 15:32:47,590 INFO L131 PetriNetUnfolder]: For 5338/5338 co-relation queries the response was YES. [2022-11-25 15:32:47,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9921 conditions, 4990 events. 2945/4990 cut-off events. For 5338/5338 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 28040 event pairs, 2736 based on Foata normal form. 24/4168 useless extension candidates. Maximal degree in co-relation 9652. Up to 4624 conditions per place. [2022-11-25 15:32:47,629 INFO L137 encePairwiseOnDemand]: 436/439 looper letters, 46 selfloop transitions, 47 changer transitions 0/100 dead transitions. [2022-11-25 15:32:47,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 100 transitions, 736 flow [2022-11-25 15:32:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 15:32:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-25 15:32:47,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 10149 transitions. [2022-11-25 15:32:47,650 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4816343963553531 [2022-11-25 15:32:47,650 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 10149 transitions. [2022-11-25 15:32:47,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 10149 transitions. [2022-11-25 15:32:47,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:32:47,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 10149 transitions. [2022-11-25 15:32:47,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 211.4375) internal successors, (10149), 48 states have internal predecessors, (10149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:47,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 439.0) internal successors, (21511), 49 states have internal predecessors, (21511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:47,717 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 439.0) internal successors, (21511), 49 states have internal predecessors, (21511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:47,717 INFO L175 Difference]: Start difference. First operand has 110 places, 76 transitions, 358 flow. Second operand 48 states and 10149 transitions. [2022-11-25 15:32:47,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 100 transitions, 736 flow [2022-11-25 15:32:47,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 100 transitions, 592 flow, removed 61 selfloop flow, removed 11 redundant places. [2022-11-25 15:32:47,728 INFO L231 Difference]: Finished difference. Result has 170 places, 100 transitions, 598 flow [2022-11-25 15:32:47,728 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=439, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=598, PETRI_PLACES=170, PETRI_TRANSITIONS=100} [2022-11-25 15:32:47,731 INFO L288 CegarLoopForPetriNet]: 54 programPoint places, 116 predicate places. [2022-11-25 15:32:47,731 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 100 transitions, 598 flow [2022-11-25 15:32:47,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 210.08163265306123) internal successors, (10294), 49 states have internal predecessors, (10294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:32:47,734 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:32:47,734 INFO L209 CegarLoopForPetriNet]: trace histogram [46, 2, 1, 1, 1, 1, 1] [2022-11-25 15:32:47,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:32:47,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:47,952 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 15:32:47,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:32:47,952 INFO L85 PathProgramCache]: Analyzing trace with hash -127316835, now seen corresponding path program 5 times [2022-11-25 15:32:47,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:32:47,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578677516] [2022-11-25 15:32:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:32:47,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:32:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:32:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:32:53,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:32:53,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578677516] [2022-11-25 15:32:53,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578677516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:32:53,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149469647] [2022-11-25 15:32:53,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:32:53,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:32:53,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:32:53,127 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:32:53,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66ac51f2-8952-4d01-b7e3-5c671fd5032c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process