./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c --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_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/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_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/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_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/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 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 --- 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 18:01:55,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:01:55,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:01:55,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:01:55,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:01:55,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:01:55,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:01:55,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:01:55,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:01:55,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:01:55,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:01:55,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:01:55,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:01:55,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:01:55,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:01:55,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:01:55,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:01:55,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:01:55,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:01:55,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:01:55,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:01:55,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:01:55,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:01:55,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:01:55,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:01:55,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:01:55,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:01:55,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:01:55,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:01:55,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:01:55,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:01:55,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:01:55,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:01:55,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:01:55,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:01:55,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:01:55,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:01:55,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:01:55,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:01:55,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:01:55,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:01:55,296 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:01:55,334 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:01:55,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:01:55,336 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:01:55,336 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:01:55,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:01:55,337 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:01:55,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:01:55,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:01:55,339 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:01:55,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:01:55,340 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:01:55,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:01:55,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:01:55,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:01:55,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:01:55,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:01:55,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:01:55,342 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:01:55,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:01:55,342 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:01:55,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:01:55,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:01:55,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:01:55,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:01:55,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:01:55,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:01:55,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:01:55,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:01:55,346 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:01:55,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:01:55,346 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:01:55,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:01:55,347 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:01:55,347 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:01:55,347 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_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 [2022-11-25 18:01:55,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:01:55,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:01:55,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:01:55,723 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:01:55,723 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:01:55,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-11-25 18:01:58,676 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:01:58,910 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:01:58,910 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-11-25 18:01:58,919 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/data/200714173/addf5c529aac4e9bb60115685162712e/FLAGc957077cd [2022-11-25 18:01:58,935 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/data/200714173/addf5c529aac4e9bb60115685162712e [2022-11-25 18:01:58,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:01:58,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:01:58,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:01:58,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:01:58,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:01:58,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:01:58" (1/1) ... [2022-11-25 18:01:58,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e359b43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:58, skipping insertion in model container [2022-11-25 18:01:58,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:01:58" (1/1) ... [2022-11-25 18:01:58,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:01:58,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:01:59,225 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_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-11-25 18:01:59,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:01:59,263 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:01:59,313 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_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-11-25 18:01:59,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:01:59,337 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:01:59,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:59 WrapperNode [2022-11-25 18:01:59,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:01:59,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:01:59,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:01:59,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:01:59,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:59" (1/1) ... [2022-11-25 18:01:59,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:59" (1/1) ... [2022-11-25 18:01:59,408 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2022-11-25 18:01:59,409 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:01:59,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:01:59,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:01:59,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:01:59,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:59" (1/1) ... [2022-11-25 18:01:59,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:59" (1/1) ... [2022-11-25 18:01:59,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:59" (1/1) ... [2022-11-25 18:01:59,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:59" (1/1) ... [2022-11-25 18:01:59,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:59" (1/1) ... [2022-11-25 18:01:59,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:59" (1/1) ... [2022-11-25 18:01:59,461 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:59" (1/1) ... [2022-11-25 18:01:59,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:59" (1/1) ... [2022-11-25 18:01:59,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:01:59,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:01:59,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:01:59,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:01:59,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:59" (1/1) ... [2022-11-25 18:01:59,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:01:59,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:01:59,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:01:59,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:01:59,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:01:59,567 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:01:59,567 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:01:59,567 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:01:59,568 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:01:59,568 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 18:01:59,568 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 18:01:59,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:01:59,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:01:59,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:01:59,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:01:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:01:59,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:01:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:01:59,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:01:59,571 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 18:01:59,742 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:01:59,744 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:02:00,093 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:02:00,103 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:02:00,103 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 18:02:00,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:02:00 BoogieIcfgContainer [2022-11-25 18:02:00,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:02:00,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:02:00,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:02:00,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:02:00,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:01:58" (1/3) ... [2022-11-25 18:02:00,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d66183d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:02:00, skipping insertion in model container [2022-11-25 18:02:00,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:01:59" (2/3) ... [2022-11-25 18:02:00,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d66183d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:02:00, skipping insertion in model container [2022-11-25 18:02:00,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:02:00" (3/3) ... [2022-11-25 18:02:00,115 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2022-11-25 18:02:00,124 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 18:02:00,135 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:02:00,135 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:02:00,135 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:02:00,269 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 18:02:00,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 184 transitions, 392 flow [2022-11-25 18:02:00,502 INFO L130 PetriNetUnfolder]: 15/181 cut-off events. [2022-11-25 18:02:00,503 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:02:00,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 181 events. 15/181 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 192 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2022-11-25 18:02:00,510 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 184 transitions, 392 flow [2022-11-25 18:02:00,521 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 170 transitions, 358 flow [2022-11-25 18:02:00,526 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:02:00,549 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 170 transitions, 358 flow [2022-11-25 18:02:00,552 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 170 transitions, 358 flow [2022-11-25 18:02:00,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 170 transitions, 358 flow [2022-11-25 18:02:00,597 INFO L130 PetriNetUnfolder]: 15/170 cut-off events. [2022-11-25 18:02:00,598 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:02:00,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 170 events. 15/170 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 191 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2022-11-25 18:02:00,602 INFO L119 LiptonReduction]: Number of co-enabled transitions 3534 [2022-11-25 18:02:08,220 INFO L134 LiptonReduction]: Checked pairs total: 4238 [2022-11-25 18:02:08,220 INFO L136 LiptonReduction]: Total number of compositions: 183 [2022-11-25 18:02:08,246 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:02:08,253 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;@7984c853, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:02:08,253 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 18:02:08,263 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2022-11-25 18:02:08,263 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:02:08,264 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:08,264 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] [2022-11-25 18:02:08,265 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:02:08,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:08,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1112105554, now seen corresponding path program 1 times [2022-11-25 18:02:08,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:08,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026341526] [2022-11-25 18:02:08,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:08,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:08,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:08,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026341526] [2022-11-25 18:02:08,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026341526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:08,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:08,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:02:08,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353029580] [2022-11-25 18:02:08,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:08,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:08,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:08,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:08,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:09,035 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 367 [2022-11-25 18:02:09,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 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 18:02:09,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:09,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 367 [2022-11-25 18:02:09,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:09,269 INFO L130 PetriNetUnfolder]: 549/720 cut-off events. [2022-11-25 18:02:09,269 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-11-25 18:02:09,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 720 events. 549/720 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2226 event pairs, 213 based on Foata normal form. 0/373 useless extension candidates. Maximal degree in co-relation 1226. Up to 704 conditions per place. [2022-11-25 18:02:09,279 INFO L137 encePairwiseOnDemand]: 364/367 looper letters, 24 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2022-11-25 18:02:09,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 128 flow [2022-11-25 18:02:09,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:09,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:09,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 510 transitions. [2022-11-25 18:02:09,304 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46321525885558584 [2022-11-25 18:02:09,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 510 transitions. [2022-11-25 18:02:09,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 510 transitions. [2022-11-25 18:02:09,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:09,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 510 transitions. [2022-11-25 18:02:09,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 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 18:02:09,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 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 18:02:09,333 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 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 18:02:09,335 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 3 states and 510 transitions. [2022-11-25 18:02:09,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 128 flow [2022-11-25 18:02:09,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 116 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 18:02:09,344 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 74 flow [2022-11-25 18:02:09,346 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2022-11-25 18:02:09,352 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2022-11-25 18:02:09,352 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 74 flow [2022-11-25 18:02:09,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 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 18:02:09,353 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:09,353 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] [2022-11-25 18:02:09,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:02:09,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:02:09,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:09,357 INFO L85 PathProgramCache]: Analyzing trace with hash 919542375, now seen corresponding path program 1 times [2022-11-25 18:02:09,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:09,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164597560] [2022-11-25 18:02:09,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:09,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:09,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:09,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164597560] [2022-11-25 18:02:09,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164597560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:09,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:09,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:02:09,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732072039] [2022-11-25 18:02:09,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:09,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:09,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:09,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:09,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:09,772 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 367 [2022-11-25 18:02:09,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 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 18:02:09,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:09,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 367 [2022-11-25 18:02:09,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:09,986 INFO L130 PetriNetUnfolder]: 753/1008 cut-off events. [2022-11-25 18:02:09,986 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 18:02:09,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2043 conditions, 1008 events. 753/1008 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3536 event pairs, 95 based on Foata normal form. 1/577 useless extension candidates. Maximal degree in co-relation 2032. Up to 825 conditions per place. [2022-11-25 18:02:09,993 INFO L137 encePairwiseOnDemand]: 360/367 looper letters, 39 selfloop transitions, 4 changer transitions 1/47 dead transitions. [2022-11-25 18:02:09,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 47 transitions, 203 flow [2022-11-25 18:02:09,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:09,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:09,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2022-11-25 18:02:09,996 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.485921889191644 [2022-11-25 18:02:09,996 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2022-11-25 18:02:09,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2022-11-25 18:02:09,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:09,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2022-11-25 18:02:09,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 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 18:02:10,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 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 18:02:10,004 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 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 18:02:10,004 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 74 flow. Second operand 3 states and 535 transitions. [2022-11-25 18:02:10,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 47 transitions, 203 flow [2022-11-25 18:02:10,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 47 transitions, 199 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:10,006 INFO L231 Difference]: Finished difference. Result has 31 places, 32 transitions, 100 flow [2022-11-25 18:02:10,006 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=31, PETRI_TRANSITIONS=32} [2022-11-25 18:02:10,007 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2022-11-25 18:02:10,007 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 32 transitions, 100 flow [2022-11-25 18:02:10,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 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 18:02:10,008 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:10,008 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] [2022-11-25 18:02:10,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:02:10,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:02:10,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:10,010 INFO L85 PathProgramCache]: Analyzing trace with hash -416894969, now seen corresponding path program 1 times [2022-11-25 18:02:10,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:10,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60137321] [2022-11-25 18:02:10,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:10,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:10,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:10,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:10,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60137321] [2022-11-25 18:02:10,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60137321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:10,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975825599] [2022-11-25 18:02:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:10,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:10,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:10,310 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:10,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:02:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:10,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:02:10,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:10,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:10,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975825599] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:10,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:10,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 18:02:10,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847676429] [2022-11-25 18:02:10,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:10,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:02:10,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:10,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:02:10,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:02:11,258 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 367 [2022-11-25 18:02:11,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 100 flow. Second operand has 12 states, 12 states have (on average 158.33333333333334) internal successors, (1900), 12 states have internal predecessors, (1900), 0 states have call successors, (0), 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 18:02:11,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:11,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 367 [2022-11-25 18:02:11,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:11,755 INFO L130 PetriNetUnfolder]: 1451/1990 cut-off events. [2022-11-25 18:02:11,756 INFO L131 PetriNetUnfolder]: For 447/447 co-relation queries the response was YES. [2022-11-25 18:02:11,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4770 conditions, 1990 events. 1451/1990 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8519 event pairs, 397 based on Foata normal form. 66/1680 useless extension candidates. Maximal degree in co-relation 2520. Up to 758 conditions per place. [2022-11-25 18:02:11,768 INFO L137 encePairwiseOnDemand]: 361/367 looper letters, 80 selfloop transitions, 6 changer transitions 0/88 dead transitions. [2022-11-25 18:02:11,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 88 transitions, 445 flow [2022-11-25 18:02:11,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:02:11,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:02:11,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1163 transitions. [2022-11-25 18:02:11,772 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4527053328143246 [2022-11-25 18:02:11,773 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1163 transitions. [2022-11-25 18:02:11,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1163 transitions. [2022-11-25 18:02:11,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:11,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1163 transitions. [2022-11-25 18:02:11,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.14285714285714) internal successors, (1163), 7 states have internal predecessors, (1163), 0 states have call successors, (0), 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 18:02:11,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 367.0) internal successors, (2936), 8 states have internal predecessors, (2936), 0 states have call successors, (0), 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 18:02:11,783 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 367.0) internal successors, (2936), 8 states have internal predecessors, (2936), 0 states have call successors, (0), 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 18:02:11,784 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 100 flow. Second operand 7 states and 1163 transitions. [2022-11-25 18:02:11,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 88 transitions, 445 flow [2022-11-25 18:02:11,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 88 transitions, 434 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:11,788 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 143 flow [2022-11-25 18:02:11,789 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=143, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2022-11-25 18:02:11,790 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2022-11-25 18:02:11,790 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 143 flow [2022-11-25 18:02:11,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 158.33333333333334) internal successors, (1900), 12 states have internal predecessors, (1900), 0 states have call successors, (0), 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 18:02:11,792 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:11,792 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:11,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 18:02:11,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:11,998 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:02:11,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:11,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1444692046, now seen corresponding path program 2 times [2022-11-25 18:02:11,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:11,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131685481] [2022-11-25 18:02:12,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:12,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:12,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:12,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131685481] [2022-11-25 18:02:12,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131685481] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:12,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965480614] [2022-11-25 18:02:12,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:02:12,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:12,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:12,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:12,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:02:12,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:02:12,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:12,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:02:12,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:12,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:12,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965480614] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:12,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:02:12,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2022-11-25 18:02:12,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440697294] [2022-11-25 18:02:12,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:12,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:02:12,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:12,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:02:12,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:02:12,526 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 367 [2022-11-25 18:02:12,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 143 flow. Second operand has 6 states, 6 states have (on average 160.5) internal successors, (963), 6 states have internal predecessors, (963), 0 states have call successors, (0), 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 18:02:12,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:12,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 367 [2022-11-25 18:02:12,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:12,913 INFO L130 PetriNetUnfolder]: 1244/1735 cut-off events. [2022-11-25 18:02:12,913 INFO L131 PetriNetUnfolder]: For 717/756 co-relation queries the response was YES. [2022-11-25 18:02:12,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4527 conditions, 1735 events. 1244/1735 cut-off events. For 717/756 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7270 event pairs, 377 based on Foata normal form. 36/1480 useless extension candidates. Maximal degree in co-relation 2762. Up to 596 conditions per place. [2022-11-25 18:02:12,926 INFO L137 encePairwiseOnDemand]: 360/367 looper letters, 71 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2022-11-25 18:02:12,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 85 transitions, 456 flow [2022-11-25 18:02:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:02:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:02:12,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1174 transitions. [2022-11-25 18:02:12,931 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45698715453483846 [2022-11-25 18:02:12,931 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1174 transitions. [2022-11-25 18:02:12,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1174 transitions. [2022-11-25 18:02:12,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:12,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1174 transitions. [2022-11-25 18:02:12,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.71428571428572) internal successors, (1174), 7 states have internal predecessors, (1174), 0 states have call successors, (0), 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 18:02:12,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 367.0) internal successors, (2936), 8 states have internal predecessors, (2936), 0 states have call successors, (0), 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 18:02:12,942 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 367.0) internal successors, (2936), 8 states have internal predecessors, (2936), 0 states have call successors, (0), 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 18:02:12,942 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 143 flow. Second operand 7 states and 1174 transitions. [2022-11-25 18:02:12,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 85 transitions, 456 flow [2022-11-25 18:02:12,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 85 transitions, 448 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-25 18:02:12,948 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 194 flow [2022-11-25 18:02:12,948 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=194, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2022-11-25 18:02:12,949 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 15 predicate places. [2022-11-25 18:02:12,949 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 194 flow [2022-11-25 18:02:12,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 160.5) internal successors, (963), 6 states have internal predecessors, (963), 0 states have call successors, (0), 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 18:02:12,950 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:12,950 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] [2022-11-25 18:02:12,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:13,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:13,156 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:02:13,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:13,157 INFO L85 PathProgramCache]: Analyzing trace with hash 946445891, now seen corresponding path program 1 times [2022-11-25 18:02:13,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:13,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502874968] [2022-11-25 18:02:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:13,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:13,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:13,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502874968] [2022-11-25 18:02:13,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502874968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:13,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292471909] [2022-11-25 18:02:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:13,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:13,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:13,334 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:13,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:02:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:13,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:02:13,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:13,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:13,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292471909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:13,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:13,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 18:02:13,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677744855] [2022-11-25 18:02:13,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:13,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:02:13,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:13,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:02:13,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:02:13,739 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 367 [2022-11-25 18:02:13,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 194 flow. Second operand has 12 states, 12 states have (on average 159.91666666666666) internal successors, (1919), 12 states have internal predecessors, (1919), 0 states have call successors, (0), 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 18:02:13,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:13,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 367 [2022-11-25 18:02:13,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:14,117 INFO L130 PetriNetUnfolder]: 1005/1425 cut-off events. [2022-11-25 18:02:14,117 INFO L131 PetriNetUnfolder]: For 1458/1512 co-relation queries the response was YES. [2022-11-25 18:02:14,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4238 conditions, 1425 events. 1005/1425 cut-off events. For 1458/1512 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5772 event pairs, 380 based on Foata normal form. 101/1350 useless extension candidates. Maximal degree in co-relation 3181. Up to 750 conditions per place. [2022-11-25 18:02:14,128 INFO L137 encePairwiseOnDemand]: 360/367 looper letters, 70 selfloop transitions, 6 changer transitions 0/79 dead transitions. [2022-11-25 18:02:14,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 79 transitions, 449 flow [2022-11-25 18:02:14,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:02:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:02:14,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1170 transitions. [2022-11-25 18:02:14,132 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45543012845465164 [2022-11-25 18:02:14,132 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1170 transitions. [2022-11-25 18:02:14,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1170 transitions. [2022-11-25 18:02:14,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:14,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1170 transitions. [2022-11-25 18:02:14,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.14285714285714) internal successors, (1170), 7 states have internal predecessors, (1170), 0 states have call successors, (0), 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 18:02:14,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 367.0) internal successors, (2936), 8 states have internal predecessors, (2936), 0 states have call successors, (0), 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 18:02:14,141 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 367.0) internal successors, (2936), 8 states have internal predecessors, (2936), 0 states have call successors, (0), 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 18:02:14,141 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 194 flow. Second operand 7 states and 1170 transitions. [2022-11-25 18:02:14,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 79 transitions, 449 flow [2022-11-25 18:02:14,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 79 transitions, 444 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:02:14,147 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 197 flow [2022-11-25 18:02:14,147 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=197, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2022-11-25 18:02:14,148 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 19 predicate places. [2022-11-25 18:02:14,148 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 197 flow [2022-11-25 18:02:14,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 159.91666666666666) internal successors, (1919), 12 states have internal predecessors, (1919), 0 states have call successors, (0), 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 18:02:14,149 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:14,149 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] [2022-11-25 18:02:14,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:14,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:14,355 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:02:14,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:14,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1627556894, now seen corresponding path program 1 times [2022-11-25 18:02:14,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:14,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827678462] [2022-11-25 18:02:14,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:14,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:14,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:14,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827678462] [2022-11-25 18:02:14,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827678462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:14,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467560354] [2022-11-25 18:02:14,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:14,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:14,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:14,544 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:14,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:02:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:14,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:02:14,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:14,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:14,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467560354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:14,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:14,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-11-25 18:02:14,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925097471] [2022-11-25 18:02:14,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:14,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:02:14,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:14,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:02:14,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:02:15,159 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 367 [2022-11-25 18:02:15,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 197 flow. Second operand has 13 states, 13 states have (on average 157.92307692307693) internal successors, (2053), 13 states have internal predecessors, (2053), 0 states have call successors, (0), 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 18:02:15,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:15,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 367 [2022-11-25 18:02:15,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:15,592 INFO L130 PetriNetUnfolder]: 638/922 cut-off events. [2022-11-25 18:02:15,592 INFO L131 PetriNetUnfolder]: For 1329/1477 co-relation queries the response was YES. [2022-11-25 18:02:15,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2981 conditions, 922 events. 638/922 cut-off events. For 1329/1477 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3568 event pairs, 209 based on Foata normal form. 148/995 useless extension candidates. Maximal degree in co-relation 2625. Up to 586 conditions per place. [2022-11-25 18:02:15,599 INFO L137 encePairwiseOnDemand]: 361/367 looper letters, 44 selfloop transitions, 4 changer transitions 25/75 dead transitions. [2022-11-25 18:02:15,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 471 flow [2022-11-25 18:02:15,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:02:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:02:15,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1148 transitions. [2022-11-25 18:02:15,604 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44686648501362397 [2022-11-25 18:02:15,604 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1148 transitions. [2022-11-25 18:02:15,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1148 transitions. [2022-11-25 18:02:15,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:15,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1148 transitions. [2022-11-25 18:02:15,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 164.0) internal successors, (1148), 7 states have internal predecessors, (1148), 0 states have call successors, (0), 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 18:02:15,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 367.0) internal successors, (2936), 8 states have internal predecessors, (2936), 0 states have call successors, (0), 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 18:02:15,616 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 367.0) internal successors, (2936), 8 states have internal predecessors, (2936), 0 states have call successors, (0), 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 18:02:15,616 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 197 flow. Second operand 7 states and 1148 transitions. [2022-11-25 18:02:15,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 471 flow [2022-11-25 18:02:15,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 441 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-11-25 18:02:15,622 INFO L231 Difference]: Finished difference. Result has 55 places, 35 transitions, 162 flow [2022-11-25 18:02:15,623 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=55, PETRI_TRANSITIONS=35} [2022-11-25 18:02:15,626 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 23 predicate places. [2022-11-25 18:02:15,626 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 35 transitions, 162 flow [2022-11-25 18:02:15,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 157.92307692307693) internal successors, (2053), 13 states have internal predecessors, (2053), 0 states have call successors, (0), 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 18:02:15,628 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:15,629 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:15,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:15,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:15,840 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:02:15,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:15,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1520371380, now seen corresponding path program 2 times [2022-11-25 18:02:15,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:15,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881474400] [2022-11-25 18:02:15,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:15,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:16,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:16,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881474400] [2022-11-25 18:02:16,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881474400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:16,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800890535] [2022-11-25 18:02:16,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:02:16,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:16,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:16,120 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:16,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:02:16,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:02:16,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:16,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:02:16,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:16,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:16,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800890535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:16,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:16,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-11-25 18:02:16,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255840139] [2022-11-25 18:02:16,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:16,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 18:02:16,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:16,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 18:02:16,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-25 18:02:17,137 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 367 [2022-11-25 18:02:17,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 35 transitions, 162 flow. Second operand has 19 states, 19 states have (on average 153.52631578947367) internal successors, (2917), 19 states have internal predecessors, (2917), 0 states have call successors, (0), 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 18:02:17,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:17,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 367 [2022-11-25 18:02:17,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:17,855 INFO L130 PetriNetUnfolder]: 1176/1619 cut-off events. [2022-11-25 18:02:17,855 INFO L131 PetriNetUnfolder]: For 1777/1999 co-relation queries the response was YES. [2022-11-25 18:02:17,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5339 conditions, 1619 events. 1176/1619 cut-off events. For 1777/1999 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6154 event pairs, 186 based on Foata normal form. 234/1853 useless extension candidates. Maximal degree in co-relation 5301. Up to 635 conditions per place. [2022-11-25 18:02:17,868 INFO L137 encePairwiseOnDemand]: 357/367 looper letters, 112 selfloop transitions, 25 changer transitions 0/138 dead transitions. [2022-11-25 18:02:17,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 138 transitions, 890 flow [2022-11-25 18:02:17,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:02:17,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:02:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1775 transitions. [2022-11-25 18:02:17,874 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4396829328709438 [2022-11-25 18:02:17,874 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1775 transitions. [2022-11-25 18:02:17,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1775 transitions. [2022-11-25 18:02:17,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:17,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1775 transitions. [2022-11-25 18:02:17,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 161.36363636363637) internal successors, (1775), 11 states have internal predecessors, (1775), 0 states have call successors, (0), 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 18:02:17,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 367.0) internal successors, (4404), 12 states have internal predecessors, (4404), 0 states have call successors, (0), 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 18:02:17,888 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 367.0) internal successors, (4404), 12 states have internal predecessors, (4404), 0 states have call successors, (0), 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 18:02:17,888 INFO L175 Difference]: Start difference. First operand has 55 places, 35 transitions, 162 flow. Second operand 11 states and 1775 transitions. [2022-11-25 18:02:17,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 138 transitions, 890 flow [2022-11-25 18:02:17,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 138 transitions, 811 flow, removed 17 selfloop flow, removed 11 redundant places. [2022-11-25 18:02:17,898 INFO L231 Difference]: Finished difference. Result has 52 places, 55 transitions, 300 flow [2022-11-25 18:02:17,899 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=300, PETRI_PLACES=52, PETRI_TRANSITIONS=55} [2022-11-25 18:02:17,899 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 20 predicate places. [2022-11-25 18:02:17,899 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 55 transitions, 300 flow [2022-11-25 18:02:17,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 153.52631578947367) internal successors, (2917), 19 states have internal predecessors, (2917), 0 states have call successors, (0), 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 18:02:17,901 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:17,901 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:17,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:18,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:18,110 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:02:18,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:18,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1639825788, now seen corresponding path program 3 times [2022-11-25 18:02:18,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:18,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705856459] [2022-11-25 18:02:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:18,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:18,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:18,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705856459] [2022-11-25 18:02:18,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705856459] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:18,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70218144] [2022-11-25 18:02:18,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:02:18,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:18,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:18,306 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:18,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:02:18,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 18:02:18,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:18,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:02:18,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:18,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:18,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70218144] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:18,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:02:18,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2022-11-25 18:02:18,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936679210] [2022-11-25 18:02:18,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:18,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:02:18,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:18,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:02:18,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:02:18,814 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 367 [2022-11-25 18:02:18,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 55 transitions, 300 flow. Second operand has 8 states, 8 states have (on average 153.875) internal successors, (1231), 8 states have internal predecessors, (1231), 0 states have call successors, (0), 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 18:02:18,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:18,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 367 [2022-11-25 18:02:18,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:19,340 INFO L130 PetriNetUnfolder]: 1583/2174 cut-off events. [2022-11-25 18:02:19,340 INFO L131 PetriNetUnfolder]: For 3479/3741 co-relation queries the response was YES. [2022-11-25 18:02:19,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8338 conditions, 2174 events. 1583/2174 cut-off events. For 3479/3741 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 8491 event pairs, 294 based on Foata normal form. 274/2448 useless extension candidates. Maximal degree in co-relation 8306. Up to 909 conditions per place. [2022-11-25 18:02:19,358 INFO L137 encePairwiseOnDemand]: 357/367 looper letters, 98 selfloop transitions, 44 changer transitions 0/143 dead transitions. [2022-11-25 18:02:19,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 143 transitions, 1035 flow [2022-11-25 18:02:19,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:02:19,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:02:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1602 transitions. [2022-11-25 18:02:19,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4365122615803815 [2022-11-25 18:02:19,364 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1602 transitions. [2022-11-25 18:02:19,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1602 transitions. [2022-11-25 18:02:19,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:19,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1602 transitions. [2022-11-25 18:02:19,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 160.2) internal successors, (1602), 10 states have internal predecessors, (1602), 0 states have call successors, (0), 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 18:02:19,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 367.0) internal successors, (4037), 11 states have internal predecessors, (4037), 0 states have call successors, (0), 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 18:02:19,376 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 367.0) internal successors, (4037), 11 states have internal predecessors, (4037), 0 states have call successors, (0), 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 18:02:19,376 INFO L175 Difference]: Start difference. First operand has 52 places, 55 transitions, 300 flow. Second operand 10 states and 1602 transitions. [2022-11-25 18:02:19,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 143 transitions, 1035 flow [2022-11-25 18:02:19,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 143 transitions, 1026 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 18:02:19,389 INFO L231 Difference]: Finished difference. Result has 62 places, 76 transitions, 588 flow [2022-11-25 18:02:19,390 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=588, PETRI_PLACES=62, PETRI_TRANSITIONS=76} [2022-11-25 18:02:19,390 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 30 predicate places. [2022-11-25 18:02:19,390 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 76 transitions, 588 flow [2022-11-25 18:02:19,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 153.875) internal successors, (1231), 8 states have internal predecessors, (1231), 0 states have call successors, (0), 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 18:02:19,391 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:19,391 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:19,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-25 18:02:19,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:19,597 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:02:19,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:19,598 INFO L85 PathProgramCache]: Analyzing trace with hash 785759930, now seen corresponding path program 4 times [2022-11-25 18:02:19,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:19,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054981279] [2022-11-25 18:02:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:19,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:19,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:19,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054981279] [2022-11-25 18:02:19,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054981279] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:19,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029616336] [2022-11-25 18:02:19,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:02:19,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:19,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:19,762 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:19,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:02:19,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:02:19,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:19,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:02:19,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:20,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:20,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029616336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:20,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:20,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-25 18:02:20,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557468010] [2022-11-25 18:02:20,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:20,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:02:20,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:20,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:02:20,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:02:20,503 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 367 [2022-11-25 18:02:20,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 76 transitions, 588 flow. Second operand has 16 states, 16 states have (on average 153.8125) internal successors, (2461), 16 states have internal predecessors, (2461), 0 states have call successors, (0), 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 18:02:20,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:20,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 367 [2022-11-25 18:02:20,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:21,145 INFO L130 PetriNetUnfolder]: 1604/2209 cut-off events. [2022-11-25 18:02:21,145 INFO L131 PetriNetUnfolder]: For 6600/6866 co-relation queries the response was YES. [2022-11-25 18:02:21,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10099 conditions, 2209 events. 1604/2209 cut-off events. For 6600/6866 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 8848 event pairs, 336 based on Foata normal form. 280/2489 useless extension candidates. Maximal degree in co-relation 10062. Up to 1117 conditions per place. [2022-11-25 18:02:21,171 INFO L137 encePairwiseOnDemand]: 358/367 looper letters, 107 selfloop transitions, 24 changer transitions 0/132 dead transitions. [2022-11-25 18:02:21,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 132 transitions, 1183 flow [2022-11-25 18:02:21,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:02:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:02:21,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1280 transitions. [2022-11-25 18:02:21,175 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4359673024523161 [2022-11-25 18:02:21,176 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1280 transitions. [2022-11-25 18:02:21,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1280 transitions. [2022-11-25 18:02:21,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:21,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1280 transitions. [2022-11-25 18:02:21,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 160.0) internal successors, (1280), 8 states have internal predecessors, (1280), 0 states have call successors, (0), 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 18:02:21,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 367.0) internal successors, (3303), 9 states have internal predecessors, (3303), 0 states have call successors, (0), 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 18:02:21,200 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 367.0) internal successors, (3303), 9 states have internal predecessors, (3303), 0 states have call successors, (0), 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 18:02:21,200 INFO L175 Difference]: Start difference. First operand has 62 places, 76 transitions, 588 flow. Second operand 8 states and 1280 transitions. [2022-11-25 18:02:21,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 132 transitions, 1183 flow [2022-11-25 18:02:21,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 132 transitions, 1142 flow, removed 18 selfloop flow, removed 3 redundant places. [2022-11-25 18:02:21,231 INFO L231 Difference]: Finished difference. Result has 69 places, 80 transitions, 676 flow [2022-11-25 18:02:21,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=676, PETRI_PLACES=69, PETRI_TRANSITIONS=80} [2022-11-25 18:02:21,233 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 37 predicate places. [2022-11-25 18:02:21,233 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 80 transitions, 676 flow [2022-11-25 18:02:21,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 153.8125) internal successors, (2461), 16 states have internal predecessors, (2461), 0 states have call successors, (0), 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 18:02:21,234 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:21,235 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:21,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:21,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 18:02:21,441 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:02:21,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:21,442 INFO L85 PathProgramCache]: Analyzing trace with hash 260161528, now seen corresponding path program 5 times [2022-11-25 18:02:21,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:21,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227896412] [2022-11-25 18:02:21,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:21,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:21,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:21,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227896412] [2022-11-25 18:02:21,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227896412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:21,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339106560] [2022-11-25 18:02:21,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:02:21,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:21,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:21,593 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:21,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:02:21,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:02:21,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:21,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:02:21,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:02:21,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:02:21,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339106560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:21,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:21,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-25 18:02:21,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509636962] [2022-11-25 18:02:21,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:21,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:02:21,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:21,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:02:21,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:02:22,326 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 367 [2022-11-25 18:02:22,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 80 transitions, 676 flow. Second operand has 15 states, 15 states have (on average 149.8) internal successors, (2247), 15 states have internal predecessors, (2247), 0 states have call successors, (0), 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 18:02:22,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:22,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 367 [2022-11-25 18:02:22,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:23,595 INFO L130 PetriNetUnfolder]: 2147/2959 cut-off events. [2022-11-25 18:02:23,595 INFO L131 PetriNetUnfolder]: For 10672/10672 co-relation queries the response was YES. [2022-11-25 18:02:23,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14141 conditions, 2959 events. 2147/2959 cut-off events. For 10672/10672 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11772 event pairs, 72 based on Foata normal form. 14/2973 useless extension candidates. Maximal degree in co-relation 14100. Up to 1093 conditions per place. [2022-11-25 18:02:23,627 INFO L137 encePairwiseOnDemand]: 356/367 looper letters, 179 selfloop transitions, 102 changer transitions 0/281 dead transitions. [2022-11-25 18:02:23,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 281 transitions, 2560 flow [2022-11-25 18:02:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 18:02:23,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 18:02:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3433 transitions. [2022-11-25 18:02:23,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42519197423829574 [2022-11-25 18:02:23,637 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3433 transitions. [2022-11-25 18:02:23,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3433 transitions. [2022-11-25 18:02:23,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:23,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3433 transitions. [2022-11-25 18:02:23,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 156.04545454545453) internal successors, (3433), 22 states have internal predecessors, (3433), 0 states have call successors, (0), 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 18:02:23,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 367.0) internal successors, (8441), 23 states have internal predecessors, (8441), 0 states have call successors, (0), 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 18:02:23,660 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 367.0) internal successors, (8441), 23 states have internal predecessors, (8441), 0 states have call successors, (0), 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 18:02:23,660 INFO L175 Difference]: Start difference. First operand has 69 places, 80 transitions, 676 flow. Second operand 22 states and 3433 transitions. [2022-11-25 18:02:23,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 281 transitions, 2560 flow [2022-11-25 18:02:23,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 281 transitions, 2481 flow, removed 20 selfloop flow, removed 4 redundant places. [2022-11-25 18:02:23,700 INFO L231 Difference]: Finished difference. Result has 96 places, 137 transitions, 1492 flow [2022-11-25 18:02:23,701 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1492, PETRI_PLACES=96, PETRI_TRANSITIONS=137} [2022-11-25 18:02:23,702 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 64 predicate places. [2022-11-25 18:02:23,702 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 137 transitions, 1492 flow [2022-11-25 18:02:23,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 149.8) internal successors, (2247), 15 states have internal predecessors, (2247), 0 states have call successors, (0), 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 18:02:23,703 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:23,703 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:23,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:23,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 18:02:23,909 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:02:23,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:23,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1588073642, now seen corresponding path program 6 times [2022-11-25 18:02:23,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:23,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356581898] [2022-11-25 18:02:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:23,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:24,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:24,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356581898] [2022-11-25 18:02:24,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356581898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:24,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968812235] [2022-11-25 18:02:24,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:02:24,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:24,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:24,062 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:24,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:02:24,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 18:02:24,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:24,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:02:24,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:24,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:24,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:24,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968812235] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:24,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:02:24,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2022-11-25 18:02:24,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520050452] [2022-11-25 18:02:24,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:24,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:02:24,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:24,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:02:24,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:02:24,685 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 367 [2022-11-25 18:02:24,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 137 transitions, 1492 flow. Second operand has 8 states, 8 states have (on average 153.875) internal successors, (1231), 8 states have internal predecessors, (1231), 0 states have call successors, (0), 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 18:02:24,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:24,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 367 [2022-11-25 18:02:24,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:25,427 INFO L130 PetriNetUnfolder]: 2294/3146 cut-off events. [2022-11-25 18:02:25,428 INFO L131 PetriNetUnfolder]: For 16871/16970 co-relation queries the response was YES. [2022-11-25 18:02:25,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16750 conditions, 3146 events. 2294/3146 cut-off events. For 16871/16970 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12656 event pairs, 384 based on Foata normal form. 115/3260 useless extension candidates. Maximal degree in co-relation 16699. Up to 1541 conditions per place. [2022-11-25 18:02:25,460 INFO L137 encePairwiseOnDemand]: 356/367 looper letters, 114 selfloop transitions, 92 changer transitions 0/215 dead transitions. [2022-11-25 18:02:25,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 215 transitions, 2422 flow [2022-11-25 18:02:25,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:02:25,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:02:25,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1450 transitions. [2022-11-25 18:02:25,465 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4389948531637905 [2022-11-25 18:02:25,465 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1450 transitions. [2022-11-25 18:02:25,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1450 transitions. [2022-11-25 18:02:25,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:25,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1450 transitions. [2022-11-25 18:02:25,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 161.11111111111111) internal successors, (1450), 9 states have internal predecessors, (1450), 0 states have call successors, (0), 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 18:02:25,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 367.0) internal successors, (3670), 10 states have internal predecessors, (3670), 0 states have call successors, (0), 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 18:02:25,475 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 367.0) internal successors, (3670), 10 states have internal predecessors, (3670), 0 states have call successors, (0), 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 18:02:25,475 INFO L175 Difference]: Start difference. First operand has 96 places, 137 transitions, 1492 flow. Second operand 9 states and 1450 transitions. [2022-11-25 18:02:25,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 215 transitions, 2422 flow [2022-11-25 18:02:25,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 215 transitions, 2240 flow, removed 17 selfloop flow, removed 6 redundant places. [2022-11-25 18:02:25,552 INFO L231 Difference]: Finished difference. Result has 102 places, 159 transitions, 1904 flow [2022-11-25 18:02:25,553 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1904, PETRI_PLACES=102, PETRI_TRANSITIONS=159} [2022-11-25 18:02:25,553 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 70 predicate places. [2022-11-25 18:02:25,554 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 159 transitions, 1904 flow [2022-11-25 18:02:25,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 153.875) internal successors, (1231), 8 states have internal predecessors, (1231), 0 states have call successors, (0), 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 18:02:25,554 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:25,554 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:25,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:25,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 18:02:25,760 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:02:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:25,761 INFO L85 PathProgramCache]: Analyzing trace with hash 88333330, now seen corresponding path program 7 times [2022-11-25 18:02:25,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:25,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568757539] [2022-11-25 18:02:25,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:25,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:25,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:25,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568757539] [2022-11-25 18:02:25,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568757539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:25,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558656562] [2022-11-25 18:02:25,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:02:25,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:25,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:25,958 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:25,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:02:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:26,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:02:26,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:26,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:26,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558656562] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:26,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:02:26,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 17 [2022-11-25 18:02:26,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486333276] [2022-11-25 18:02:26,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:26,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:02:26,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:26,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:02:26,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-25 18:02:26,503 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 367 [2022-11-25 18:02:26,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 159 transitions, 1904 flow. Second operand has 8 states, 8 states have (on average 153.875) internal successors, (1231), 8 states have internal predecessors, (1231), 0 states have call successors, (0), 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 18:02:26,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:26,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 367 [2022-11-25 18:02:26,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:27,244 INFO L130 PetriNetUnfolder]: 2332/3196 cut-off events. [2022-11-25 18:02:27,244 INFO L131 PetriNetUnfolder]: For 20276/20357 co-relation queries the response was YES. [2022-11-25 18:02:27,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18059 conditions, 3196 events. 2332/3196 cut-off events. For 20276/20357 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 12769 event pairs, 452 based on Foata normal form. 97/3292 useless extension candidates. Maximal degree in co-relation 18004. Up to 1671 conditions per place. [2022-11-25 18:02:27,276 INFO L137 encePairwiseOnDemand]: 356/367 looper letters, 112 selfloop transitions, 101 changer transitions 0/222 dead transitions. [2022-11-25 18:02:27,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 222 transitions, 2748 flow [2022-11-25 18:02:27,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:02:27,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:02:27,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1443 transitions. [2022-11-25 18:02:27,281 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4368755676657584 [2022-11-25 18:02:27,281 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1443 transitions. [2022-11-25 18:02:27,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1443 transitions. [2022-11-25 18:02:27,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:27,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1443 transitions. [2022-11-25 18:02:27,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.33333333333334) internal successors, (1443), 9 states have internal predecessors, (1443), 0 states have call successors, (0), 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 18:02:27,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 367.0) internal successors, (3670), 10 states have internal predecessors, (3670), 0 states have call successors, (0), 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 18:02:27,290 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 367.0) internal successors, (3670), 10 states have internal predecessors, (3670), 0 states have call successors, (0), 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 18:02:27,290 INFO L175 Difference]: Start difference. First operand has 102 places, 159 transitions, 1904 flow. Second operand 9 states and 1443 transitions. [2022-11-25 18:02:27,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 222 transitions, 2748 flow [2022-11-25 18:02:27,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 222 transitions, 2652 flow, removed 13 selfloop flow, removed 4 redundant places. [2022-11-25 18:02:27,408 INFO L231 Difference]: Finished difference. Result has 108 places, 172 transitions, 2262 flow [2022-11-25 18:02:27,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2262, PETRI_PLACES=108, PETRI_TRANSITIONS=172} [2022-11-25 18:02:27,410 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 76 predicate places. [2022-11-25 18:02:27,410 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 172 transitions, 2262 flow [2022-11-25 18:02:27,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 153.875) internal successors, (1231), 8 states have internal predecessors, (1231), 0 states have call successors, (0), 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 18:02:27,411 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:27,411 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:27,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:27,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 18:02:27,617 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:02:27,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:27,617 INFO L85 PathProgramCache]: Analyzing trace with hash 233111933, now seen corresponding path program 1 times [2022-11-25 18:02:27,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:27,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514032193] [2022-11-25 18:02:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:27,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:02:27,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:27,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514032193] [2022-11-25 18:02:27,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514032193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:27,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:27,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:02:27,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151042669] [2022-11-25 18:02:27,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:27,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:02:27,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:27,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:02:27,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:02:27,709 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 367 [2022-11-25 18:02:27,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 172 transitions, 2262 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 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 18:02:27,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:27,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 367 [2022-11-25 18:02:27,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:28,204 INFO L130 PetriNetUnfolder]: 2206/3055 cut-off events. [2022-11-25 18:02:28,204 INFO L131 PetriNetUnfolder]: For 25656/26427 co-relation queries the response was YES. [2022-11-25 18:02:28,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18096 conditions, 3055 events. 2206/3055 cut-off events. For 25656/26427 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 13518 event pairs, 616 based on Foata normal form. 479/3461 useless extension candidates. Maximal degree in co-relation 18039. Up to 1913 conditions per place. [2022-11-25 18:02:28,241 INFO L137 encePairwiseOnDemand]: 364/367 looper letters, 187 selfloop transitions, 3 changer transitions 0/218 dead transitions. [2022-11-25 18:02:28,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 218 transitions, 3201 flow [2022-11-25 18:02:28,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:02:28,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:02:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2022-11-25 18:02:28,244 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4877384196185286 [2022-11-25 18:02:28,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2022-11-25 18:02:28,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2022-11-25 18:02:28,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:28,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2022-11-25 18:02:28,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 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 18:02:28,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 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 18:02:28,248 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 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 18:02:28,248 INFO L175 Difference]: Start difference. First operand has 108 places, 172 transitions, 2262 flow. Second operand 3 states and 537 transitions. [2022-11-25 18:02:28,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 218 transitions, 3201 flow [2022-11-25 18:02:28,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 218 transitions, 3132 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-25 18:02:28,321 INFO L231 Difference]: Finished difference. Result has 107 places, 172 transitions, 2213 flow [2022-11-25 18:02:28,322 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=2195, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2213, PETRI_PLACES=107, PETRI_TRANSITIONS=172} [2022-11-25 18:02:28,322 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 75 predicate places. [2022-11-25 18:02:28,323 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 172 transitions, 2213 flow [2022-11-25 18:02:28,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 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 18:02:28,323 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:28,323 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:28,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 18:02:28,324 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:02:28,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:28,324 INFO L85 PathProgramCache]: Analyzing trace with hash 987165768, now seen corresponding path program 1 times [2022-11-25 18:02:28,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:28,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59681118] [2022-11-25 18:02:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:28,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:30,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:30,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59681118] [2022-11-25 18:02:30,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59681118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:30,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519562254] [2022-11-25 18:02:30,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:30,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:30,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:30,983 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:31,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 18:02:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:31,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 18:02:31,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:31,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:31,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 18:02:31,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:31,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 18:02:32,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:32,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:32,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:32,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:32,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:32,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 36 [2022-11-25 18:02:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:02:32,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:34,391 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:34,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 67 [2022-11-25 18:02:34,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:34,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 206 treesize of output 200 [2022-11-25 18:02:34,456 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:34,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 120 [2022-11-25 18:02:34,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:34,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 114 [2022-11-25 18:02:34,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:34,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:34,814 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-25 18:02:34,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 1 [2022-11-25 18:02:34,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:34,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:34,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:34,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 4 [2022-11-25 18:02:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:02:35,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519562254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:35,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:02:35,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 36 [2022-11-25 18:02:35,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978016631] [2022-11-25 18:02:35,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:35,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 18:02:35,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:35,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 18:02:35,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1275, Unknown=7, NotChecked=0, Total=1406 [2022-11-25 18:02:40,119 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 367 [2022-11-25 18:02:40,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 172 transitions, 2213 flow. Second operand has 38 states, 38 states have (on average 95.94736842105263) internal successors, (3646), 38 states have internal predecessors, (3646), 0 states have call successors, (0), 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 18:02:40,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:40,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 367 [2022-11-25 18:02:40,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:03:09,240 WARN L233 SmtUtils]: Spent 13.29s on a formula simplification. DAG size of input: 114 DAG size of output: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:03:15,961 WARN L233 SmtUtils]: Spent 6.57s on a formula simplification. DAG size of input: 88 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:03:26,303 WARN L233 SmtUtils]: Spent 6.68s on a formula simplification. DAG size of input: 91 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:03:44,890 WARN L233 SmtUtils]: Spent 17.75s on a formula simplification. DAG size of input: 132 DAG size of output: 118 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:03:55,041 WARN L233 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 135 DAG size of output: 125 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:04:03,360 WARN L233 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 133 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:04:13,111 WARN L233 SmtUtils]: Spent 8.91s on a formula simplification. DAG size of input: 149 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:04:20,523 WARN L233 SmtUtils]: Spent 6.80s on a formula simplification. DAG size of input: 109 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:04:29,835 WARN L233 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 86 DAG size of output: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:04:36,797 WARN L233 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 107 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:04:47,099 WARN L233 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 112 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:04:54,505 WARN L233 SmtUtils]: Spent 6.93s on a formula simplification. DAG size of input: 112 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:05:10,282 WARN L233 SmtUtils]: Spent 10.76s on a formula simplification. DAG size of input: 128 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:05:17,989 WARN L233 SmtUtils]: Spent 7.08s on a formula simplification. DAG size of input: 128 DAG size of output: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:05:25,591 WARN L233 SmtUtils]: Spent 7.33s on a formula simplification. DAG size of input: 144 DAG size of output: 114 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:05:33,203 WARN L233 SmtUtils]: Spent 6.66s on a formula simplification. DAG size of input: 105 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:05:40,595 WARN L233 SmtUtils]: Spent 6.80s on a formula simplification. DAG size of input: 121 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:05:41,455 INFO L130 PetriNetUnfolder]: 8008/11638 cut-off events. [2022-11-25 18:05:41,455 INFO L131 PetriNetUnfolder]: For 89258/89258 co-relation queries the response was YES. [2022-11-25 18:05:41,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66511 conditions, 11638 events. 8008/11638 cut-off events. For 89258/89258 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 64641 event pairs, 65 based on Foata normal form. 271/11909 useless extension candidates. Maximal degree in co-relation 66455. Up to 4902 conditions per place. [2022-11-25 18:05:41,582 INFO L137 encePairwiseOnDemand]: 349/367 looper letters, 609 selfloop transitions, 783 changer transitions 20/1412 dead transitions. [2022-11-25 18:05:41,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 1412 transitions, 17347 flow [2022-11-25 18:05:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-25 18:05:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2022-11-25 18:05:41,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 9659 transitions. [2022-11-25 18:05:41,606 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2799872456374283 [2022-11-25 18:05:41,606 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 9659 transitions. [2022-11-25 18:05:41,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 9659 transitions. [2022-11-25 18:05:41,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:05:41,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 9659 transitions. [2022-11-25 18:05:41,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 102.75531914893617) internal successors, (9659), 94 states have internal predecessors, (9659), 0 states have call successors, (0), 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 18:05:41,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 367.0) internal successors, (34865), 95 states have internal predecessors, (34865), 0 states have call successors, (0), 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 18:05:41,685 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 367.0) internal successors, (34865), 95 states have internal predecessors, (34865), 0 states have call successors, (0), 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 18:05:41,685 INFO L175 Difference]: Start difference. First operand has 107 places, 172 transitions, 2213 flow. Second operand 94 states and 9659 transitions. [2022-11-25 18:05:41,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 1412 transitions, 17347 flow [2022-11-25 18:05:42,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 1412 transitions, 17335 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:05:42,190 INFO L231 Difference]: Finished difference. Result has 232 places, 911 transitions, 13947 flow [2022-11-25 18:05:42,190 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=2129, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=13947, PETRI_PLACES=232, PETRI_TRANSITIONS=911} [2022-11-25 18:05:42,191 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 200 predicate places. [2022-11-25 18:05:42,191 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 911 transitions, 13947 flow [2022-11-25 18:05:42,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 95.94736842105263) internal successors, (3646), 38 states have internal predecessors, (3646), 0 states have call successors, (0), 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 18:05:42,192 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:05:42,192 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:05:42,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 18:05:42,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 18:05:42,399 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:05:42,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:05:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1739931040, now seen corresponding path program 2 times [2022-11-25 18:05:42,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:05:42,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936722596] [2022-11-25 18:05:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:05:42,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:05:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:05:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:05:44,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:05:44,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936722596] [2022-11-25 18:05:44,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936722596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:05:44,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116128835] [2022-11-25 18:05:44,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:05:44,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:05:44,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:05:44,762 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:05:44,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 18:05:44,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:05:44,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:05:44,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 18:05:44,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:05:45,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:05:45,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:05:45,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:05:45,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:05:45,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:05:45,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 36 [2022-11-25 18:05:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:05:46,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:05:47,096 INFO L321 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2022-11-25 18:05:47,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 43 [2022-11-25 18:05:47,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:05:47,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 88 [2022-11-25 18:05:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:05:48,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116128835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:05:48,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:05:48,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 31 [2022-11-25 18:05:48,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663164493] [2022-11-25 18:05:48,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:05:48,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 18:05:48,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:05:48,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 18:05:48,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-11-25 18:05:53,550 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 367 [2022-11-25 18:05:53,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 911 transitions, 13947 flow. Second operand has 32 states, 32 states have (on average 131.3125) internal successors, (4202), 32 states have internal predecessors, (4202), 0 states have call successors, (0), 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 18:05:53,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:05:53,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 367 [2022-11-25 18:05:53,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:06:27,520 INFO L130 PetriNetUnfolder]: 16624/24082 cut-off events. [2022-11-25 18:06:27,520 INFO L131 PetriNetUnfolder]: For 254399/254399 co-relation queries the response was YES. [2022-11-25 18:06:27,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166207 conditions, 24082 events. 16624/24082 cut-off events. For 254399/254399 co-relation queries the response was YES. Maximal size of possible extension queue 1086. Compared 147339 event pairs, 221 based on Foata normal form. 19/24101 useless extension candidates. Maximal degree in co-relation 166114. Up to 10246 conditions per place. [2022-11-25 18:06:27,923 INFO L137 encePairwiseOnDemand]: 347/367 looper letters, 955 selfloop transitions, 1758 changer transitions 26/2739 dead transitions. [2022-11-25 18:06:27,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 2739 transitions, 41349 flow [2022-11-25 18:06:27,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-25 18:06:27,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-11-25 18:06:27,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 13405 transitions. [2022-11-25 18:06:27,953 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.380477974568574 [2022-11-25 18:06:27,953 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 13405 transitions. [2022-11-25 18:06:27,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 13405 transitions. [2022-11-25 18:06:27,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:06:27,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 13405 transitions. [2022-11-25 18:06:27,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 139.63541666666666) internal successors, (13405), 96 states have internal predecessors, (13405), 0 states have call successors, (0), 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 18:06:28,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 367.0) internal successors, (35599), 97 states have internal predecessors, (35599), 0 states have call successors, (0), 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 18:06:28,032 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 367.0) internal successors, (35599), 97 states have internal predecessors, (35599), 0 states have call successors, (0), 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 18:06:28,033 INFO L175 Difference]: Start difference. First operand has 232 places, 911 transitions, 13947 flow. Second operand 96 states and 13405 transitions. [2022-11-25 18:06:28,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 2739 transitions, 41349 flow [2022-11-25 18:06:31,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 2739 transitions, 38221 flow, removed 1498 selfloop flow, removed 4 redundant places. [2022-11-25 18:06:31,064 INFO L231 Difference]: Finished difference. Result has 371 places, 2105 transitions, 34319 flow [2022-11-25 18:06:31,064 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=12445, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=911, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=684, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=34319, PETRI_PLACES=371, PETRI_TRANSITIONS=2105} [2022-11-25 18:06:31,065 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 339 predicate places. [2022-11-25 18:06:31,065 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 2105 transitions, 34319 flow [2022-11-25 18:06:31,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 131.3125) internal successors, (4202), 32 states have internal predecessors, (4202), 0 states have call successors, (0), 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 18:06:31,066 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:06:31,066 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:06:31,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 18:06:31,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:06:31,267 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:06:31,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:06:31,267 INFO L85 PathProgramCache]: Analyzing trace with hash 2099806230, now seen corresponding path program 3 times [2022-11-25 18:06:31,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:06:31,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631130484] [2022-11-25 18:06:31,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:06:31,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:06:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:06:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:06:33,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:06:33,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631130484] [2022-11-25 18:06:33,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631130484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:06:33,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569860938] [2022-11-25 18:06:33,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:06:33,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:06:33,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:06:33,773 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:06:33,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 18:06:34,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 18:06:34,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:06:34,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 18:06:34,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:06:34,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:06:34,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 18:06:35,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:06:35,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:06:35,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:06:35,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:06:35,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:06:35,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 36 [2022-11-25 18:06:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:06:35,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:06:37,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:06:37,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 106 [2022-11-25 18:06:37,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:06:37,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 52 [2022-11-25 18:06:37,611 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:06:37,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 25 [2022-11-25 18:06:37,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:06:37,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 106 [2022-11-25 18:06:37,702 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:06:37,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 52 [2022-11-25 18:06:37,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:06:37,858 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:06:37,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 4 [2022-11-25 18:06:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:06:38,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569860938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:06:38,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:06:38,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 34 [2022-11-25 18:06:38,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795991922] [2022-11-25 18:06:38,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:06:38,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 18:06:38,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:06:38,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 18:06:38,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1141, Unknown=7, NotChecked=0, Total=1260 [2022-11-25 18:06:48,105 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 367 [2022-11-25 18:06:48,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 2105 transitions, 34319 flow. Second operand has 36 states, 36 states have (on average 102.05555555555556) internal successors, (3674), 36 states have internal predecessors, (3674), 0 states have call successors, (0), 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 18:06:48,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:06:48,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 367 [2022-11-25 18:06:48,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:33,952 WARN L233 SmtUtils]: Spent 8.89s on a formula simplification. DAG size of input: 109 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:08:03,013 WARN L233 SmtUtils]: Spent 15.19s on a formula simplification. DAG size of input: 112 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:08:15,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:08:39,620 WARN L233 SmtUtils]: Spent 7.13s on a formula simplification. DAG size of input: 127 DAG size of output: 119 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:08:59,151 WARN L233 SmtUtils]: Spent 19.33s on a formula simplification. DAG size of input: 125 DAG size of output: 112 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:09:39,215 WARN L233 SmtUtils]: Spent 27.90s on a formula simplification. DAG size of input: 128 DAG size of output: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:10:12,499 WARN L233 SmtUtils]: Spent 13.29s on a formula simplification. DAG size of input: 107 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:10:24,166 WARN L233 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 100 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:10:41,282 WARN L233 SmtUtils]: Spent 15.16s on a formula simplification. DAG size of input: 123 DAG size of output: 109 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:10:53,308 INFO L130 PetriNetUnfolder]: 37736/55071 cut-off events. [2022-11-25 18:10:53,308 INFO L131 PetriNetUnfolder]: For 834464/834464 co-relation queries the response was YES. [2022-11-25 18:10:54,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442045 conditions, 55071 events. 37736/55071 cut-off events. For 834464/834464 co-relation queries the response was YES. Maximal size of possible extension queue 2423. Compared 382479 event pairs, 1117 based on Foata normal form. 61/55132 useless extension candidates. Maximal degree in co-relation 441903. Up to 16685 conditions per place. [2022-11-25 18:10:54,807 INFO L137 encePairwiseOnDemand]: 348/367 looper letters, 2031 selfloop transitions, 4524 changer transitions 26/6581 dead transitions. [2022-11-25 18:10:54,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 6581 transitions, 116294 flow [2022-11-25 18:10:54,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-11-25 18:10:54,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2022-11-25 18:10:54,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 18675 transitions. [2022-11-25 18:10:54,840 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29932681519474275 [2022-11-25 18:10:54,841 INFO L72 ComplementDD]: Start complementDD. Operand 170 states and 18675 transitions. [2022-11-25 18:10:54,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 170 states and 18675 transitions. [2022-11-25 18:10:54,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:54,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 170 states and 18675 transitions. [2022-11-25 18:10:54,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 171 states, 170 states have (on average 109.8529411764706) internal successors, (18675), 170 states have internal predecessors, (18675), 0 states have call successors, (0), 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 18:10:54,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 171 states, 171 states have (on average 367.0) internal successors, (62757), 171 states have internal predecessors, (62757), 0 states have call successors, (0), 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 18:10:54,941 INFO L81 ComplementDD]: Finished complementDD. Result has 171 states, 171 states have (on average 367.0) internal successors, (62757), 171 states have internal predecessors, (62757), 0 states have call successors, (0), 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 18:10:54,941 INFO L175 Difference]: Start difference. First operand has 371 places, 2105 transitions, 34319 flow. Second operand 170 states and 18675 transitions. [2022-11-25 18:10:54,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 6581 transitions, 116294 flow [2022-11-25 18:11:29,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 6581 transitions, 110001 flow, removed 2964 selfloop flow, removed 7 redundant places. [2022-11-25 18:11:29,955 INFO L231 Difference]: Finished difference. Result has 609 places, 5147 transitions, 99872 flow [2022-11-25 18:11:29,957 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=32059, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1636, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=170, PETRI_FLOW=99872, PETRI_PLACES=609, PETRI_TRANSITIONS=5147} [2022-11-25 18:11:29,957 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 577 predicate places. [2022-11-25 18:11:29,957 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 5147 transitions, 99872 flow [2022-11-25 18:11:29,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 102.05555555555556) internal successors, (3674), 36 states have internal predecessors, (3674), 0 states have call successors, (0), 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 18:11:29,958 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:11:29,959 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:11:29,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 18:11:30,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:11:30,170 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:11:30,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:11:30,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1974032338, now seen corresponding path program 4 times [2022-11-25 18:11:30,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:11:30,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253882020] [2022-11-25 18:11:30,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:11:30,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:11:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:11:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:11:33,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:11:33,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253882020] [2022-11-25 18:11:33,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253882020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:11:33,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817808797] [2022-11-25 18:11:33,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:11:33,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:11:33,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:11:33,494 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:11:33,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc53bec4-3c9c-4778-acd0-47a8e427d4f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 18:11:33,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:11:33,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:11:33,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 18:11:33,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:11:34,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:11:34,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:11:34,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 60 [2022-11-25 18:11:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:11:35,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:11:36,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:11:36,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 88 [2022-11-25 18:11:36,922 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-25 18:11:36,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 1 [2022-11-25 18:11:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:11:37,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817808797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:11:37,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:11:37,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 32 [2022-11-25 18:11:37,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803074565] [2022-11-25 18:11:37,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:11:37,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 18:11:37,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:11:37,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 18:11:37,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 18:11:46,580 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 367 [2022-11-25 18:11:46,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 5147 transitions, 99872 flow. Second operand has 33 states, 33 states have (on average 126.24242424242425) internal successors, (4166), 33 states have internal predecessors, (4166), 0 states have call successors, (0), 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 18:11:46,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:11:46,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 367 [2022-11-25 18:11:46,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand