./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.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_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/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_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/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_b7f910b5-6bba-470e-8154-32f0b7d43d2b/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 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d --- 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 17:52:50,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:52:50,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:52:50,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:52:50,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:52:50,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:52:50,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:52:50,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:52:50,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:52:50,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:52:50,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:52:50,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:52:50,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:52:50,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:52:50,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:52:50,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:52:50,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:52:50,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:52:50,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:52:50,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:52:50,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:52:51,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:52:51,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:52:51,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:52:51,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:52:51,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:52:51,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:52:51,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:52:51,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:52:51,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:52:51,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:52:51,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:52:51,023 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:52:51,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:52:51,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:52:51,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:52:51,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:52:51,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:52:51,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:52:51,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:52:51,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:52:51,032 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:52:51,068 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:52:51,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:52:51,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:52:51,069 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:52:51,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:52:51,071 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:52:51,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:52:51,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:52:51,083 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:52:51,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:52:51,085 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:52:51,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:52:51,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:52:51,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:52:51,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:52:51,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:52:51,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:52:51,087 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:52:51,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:52:51,087 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:52:51,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:52:51,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:52:51,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:52:51,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:52:51,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:52:51,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:52:51,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:52:51,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:52:51,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:52:51,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:52:51,091 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:52:51,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:52:51,092 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:52:51,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:52:51,093 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_b7f910b5-6bba-470e-8154-32f0b7d43d2b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d [2022-11-25 17:52:51,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:52:51,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:52:51,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:52:51,475 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:52:51,476 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:52:51,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-11-25 17:52:54,472 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:52:54,770 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:52:54,781 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-11-25 17:52:54,791 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/data/210206ec8/73252913961c4eff87b2d5aee53b07f1/FLAGee882b83f [2022-11-25 17:52:54,810 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/data/210206ec8/73252913961c4eff87b2d5aee53b07f1 [2022-11-25 17:52:54,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:52:54,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:52:54,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:52:54,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:52:54,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:52:54,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:52:54" (1/1) ... [2022-11-25 17:52:54,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72de4a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:54, skipping insertion in model container [2022-11-25 17:52:54,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:52:54" (1/1) ... [2022-11-25 17:52:54,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:52:54,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:52:55,144 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_b7f910b5-6bba-470e-8154-32f0b7d43d2b/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-11-25 17:52:55,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:52:55,174 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:52:55,219 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_b7f910b5-6bba-470e-8154-32f0b7d43d2b/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-11-25 17:52:55,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:52:55,238 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:52:55,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:55 WrapperNode [2022-11-25 17:52:55,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:52:55,240 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:52:55,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:52:55,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:52:55,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:55" (1/1) ... [2022-11-25 17:52:55,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:55" (1/1) ... [2022-11-25 17:52:55,287 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 297 [2022-11-25 17:52:55,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:52:55,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:52:55,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:52:55,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:52:55,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:55" (1/1) ... [2022-11-25 17:52:55,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:55" (1/1) ... [2022-11-25 17:52:55,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:55" (1/1) ... [2022-11-25 17:52:55,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:55" (1/1) ... [2022-11-25 17:52:55,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:55" (1/1) ... [2022-11-25 17:52:55,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:55" (1/1) ... [2022-11-25 17:52:55,336 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:55" (1/1) ... [2022-11-25 17:52:55,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:55" (1/1) ... [2022-11-25 17:52:55,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:52:55,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:52:55,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:52:55,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:52:55,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:55" (1/1) ... [2022-11-25 17:52:55,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:52:55,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:55,376 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:52:55,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:52:55,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:52:55,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:52:55,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:52:55,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:52:55,428 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:52:55,428 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:52:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:52:55,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:52:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:52:55,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:52:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:52:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:52:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:52:55,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:52:55,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:52:55,437 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 17:52:55,554 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:52:55,556 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:52:56,205 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:52:56,219 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:52:56,220 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 17:52:56,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:52:56 BoogieIcfgContainer [2022-11-25 17:52:56,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:52:56,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:52:56,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:52:56,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:52:56,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:52:54" (1/3) ... [2022-11-25 17:52:56,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@682e0278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:52:56, skipping insertion in model container [2022-11-25 17:52:56,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:55" (2/3) ... [2022-11-25 17:52:56,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@682e0278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:52:56, skipping insertion in model container [2022-11-25 17:52:56,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:52:56" (3/3) ... [2022-11-25 17:52:56,232 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2022-11-25 17:52:56,241 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:52:56,252 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:52:56,253 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:52:56,253 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:52:56,362 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:52:56,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 359 places, 375 transitions, 774 flow [2022-11-25 17:52:56,685 INFO L130 PetriNetUnfolder]: 26/372 cut-off events. [2022-11-25 17:52:56,685 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:52:56,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 372 events. 26/372 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 884 event pairs, 0 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 274. Up to 2 conditions per place. [2022-11-25 17:52:56,699 INFO L82 GeneralOperation]: Start removeDead. Operand has 359 places, 375 transitions, 774 flow [2022-11-25 17:52:56,714 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 345 places, 361 transitions, 740 flow [2022-11-25 17:52:56,718 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:52:56,745 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 345 places, 361 transitions, 740 flow [2022-11-25 17:52:56,754 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 345 places, 361 transitions, 740 flow [2022-11-25 17:52:56,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 345 places, 361 transitions, 740 flow [2022-11-25 17:52:56,863 INFO L130 PetriNetUnfolder]: 26/361 cut-off events. [2022-11-25 17:52:56,863 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:52:56,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 361 events. 26/361 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 881 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 274. Up to 2 conditions per place. [2022-11-25 17:52:56,886 INFO L119 LiptonReduction]: Number of co-enabled transitions 34440 [2022-11-25 17:53:12,430 INFO L134 LiptonReduction]: Checked pairs total: 29745 [2022-11-25 17:53:12,431 INFO L136 LiptonReduction]: Total number of compositions: 418 [2022-11-25 17:53:12,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:53:12,452 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;@1e2b9b39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:53:12,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 17:53:12,470 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2022-11-25 17:53:12,471 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:53:12,471 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:12,472 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 17:53:12,473 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 17:53:12,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:12,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1824192461, now seen corresponding path program 1 times [2022-11-25 17:53:12,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:12,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000586748] [2022-11-25 17:53:12,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:12,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:13,002 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 17:53:13,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:13,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000586748] [2022-11-25 17:53:13,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000586748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:13,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:13,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:53:13,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951405023] [2022-11-25 17:53:13,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:13,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:53:13,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:13,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:53:13,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:53:13,080 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 345 out of 793 [2022-11-25 17:53:13,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 351.6666666666667) internal successors, (1055), 3 states have internal predecessors, (1055), 0 states have call successors, (0), 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 17:53:13,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:13,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 345 of 793 [2022-11-25 17:53:13,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:13,246 INFO L130 PetriNetUnfolder]: 221/328 cut-off events. [2022-11-25 17:53:13,246 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-25 17:53:13,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 328 events. 221/328 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 778 event pairs, 138 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 534. Up to 328 conditions per place. [2022-11-25 17:53:13,250 INFO L137 encePairwiseOnDemand]: 790/793 looper letters, 23 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2022-11-25 17:53:13,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 118 flow [2022-11-25 17:53:13,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:53:13,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:53:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1061 transitions. [2022-11-25 17:53:13,277 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44598570828079026 [2022-11-25 17:53:13,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1061 transitions. [2022-11-25 17:53:13,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1061 transitions. [2022-11-25 17:53:13,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:13,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1061 transitions. [2022-11-25 17:53:13,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 353.6666666666667) internal successors, (1061), 3 states have internal predecessors, (1061), 0 states have call successors, (0), 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 17:53:13,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 793.0) internal successors, (3172), 4 states have internal predecessors, (3172), 0 states have call successors, (0), 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 17:53:13,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 793.0) internal successors, (3172), 4 states have internal predecessors, (3172), 0 states have call successors, (0), 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 17:53:13,310 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 1061 transitions. [2022-11-25 17:53:13,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 118 flow [2022-11-25 17:53:13,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 106 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:53:13,319 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2022-11-25 17:53:13,321 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2022-11-25 17:53:13,326 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2022-11-25 17:53:13,326 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2022-11-25 17:53:13,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 351.6666666666667) internal successors, (1055), 3 states have internal predecessors, (1055), 0 states have call successors, (0), 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 17:53:13,327 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:13,327 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 17:53:13,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:53:13,328 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 17:53:13,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:13,340 INFO L85 PathProgramCache]: Analyzing trace with hash 342028530, now seen corresponding path program 1 times [2022-11-25 17:53:13,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:13,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17436854] [2022-11-25 17:53:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:13,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:13,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:13,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17436854] [2022-11-25 17:53:13,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17436854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:13,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734312124] [2022-11-25 17:53:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:13,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:13,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:13,638 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:13,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:53:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:13,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:53:13,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:13,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:13,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734312124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:13,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:13,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 17:53:13,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81150917] [2022-11-25 17:53:13,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:13,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:53:13,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:13,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:53:13,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:53:13,955 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 793 [2022-11-25 17:53:13,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 346.85714285714283) internal successors, (2428), 7 states have internal predecessors, (2428), 0 states have call successors, (0), 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 17:53:13,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:13,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 793 [2022-11-25 17:53:13,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:14,167 INFO L130 PetriNetUnfolder]: 221/330 cut-off events. [2022-11-25 17:53:14,167 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:53:14,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 330 events. 221/330 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 779 event pairs, 138 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 673. Up to 328 conditions per place. [2022-11-25 17:53:14,170 INFO L137 encePairwiseOnDemand]: 790/793 looper letters, 23 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2022-11-25 17:53:14,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 128 flow [2022-11-25 17:53:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:53:14,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:53:14,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1744 transitions. [2022-11-25 17:53:14,177 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4398486759142497 [2022-11-25 17:53:14,177 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1744 transitions. [2022-11-25 17:53:14,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1744 transitions. [2022-11-25 17:53:14,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:14,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1744 transitions. [2022-11-25 17:53:14,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 348.8) internal successors, (1744), 5 states have internal predecessors, (1744), 0 states have call successors, (0), 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 17:53:14,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 793.0) internal successors, (4758), 6 states have internal predecessors, (4758), 0 states have call successors, (0), 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 17:53:14,195 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 793.0) internal successors, (4758), 6 states have internal predecessors, (4758), 0 states have call successors, (0), 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 17:53:14,196 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 1744 transitions. [2022-11-25 17:53:14,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 128 flow [2022-11-25 17:53:14,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 124 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:53:14,198 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 88 flow [2022-11-25 17:53:14,198 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2022-11-25 17:53:14,199 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2022-11-25 17:53:14,199 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 88 flow [2022-11-25 17:53:14,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 346.85714285714283) internal successors, (2428), 7 states have internal predecessors, (2428), 0 states have call successors, (0), 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 17:53:14,201 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:14,201 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:14,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:14,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:14,408 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 17:53:14,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:14,409 INFO L85 PathProgramCache]: Analyzing trace with hash -10557806, now seen corresponding path program 2 times [2022-11-25 17:53:14,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:14,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344542636] [2022-11-25 17:53:14,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:14,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:53:15,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:15,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344542636] [2022-11-25 17:53:15,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344542636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:15,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:15,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:53:15,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271135958] [2022-11-25 17:53:15,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:15,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:53:15,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:15,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:53:15,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:53:15,250 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 793 [2022-11-25 17:53:15,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 336.2) internal successors, (1681), 5 states have internal predecessors, (1681), 0 states have call successors, (0), 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 17:53:15,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:15,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 793 [2022-11-25 17:53:15,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:15,526 INFO L130 PetriNetUnfolder]: 381/567 cut-off events. [2022-11-25 17:53:15,526 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 17:53:15,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 567 events. 381/567 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1732 event pairs, 138 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1148. Up to 331 conditions per place. [2022-11-25 17:53:15,529 INFO L137 encePairwiseOnDemand]: 789/793 looper letters, 37 selfloop transitions, 2 changer transitions 17/56 dead transitions. [2022-11-25 17:53:15,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 265 flow [2022-11-25 17:53:15,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:53:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:53:15,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1382 transitions. [2022-11-25 17:53:15,534 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43568726355611603 [2022-11-25 17:53:15,534 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1382 transitions. [2022-11-25 17:53:15,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1382 transitions. [2022-11-25 17:53:15,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:15,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1382 transitions. [2022-11-25 17:53:15,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 345.5) internal successors, (1382), 4 states have internal predecessors, (1382), 0 states have call successors, (0), 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 17:53:15,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 793.0) internal successors, (3965), 5 states have internal predecessors, (3965), 0 states have call successors, (0), 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 17:53:15,548 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 793.0) internal successors, (3965), 5 states have internal predecessors, (3965), 0 states have call successors, (0), 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 17:53:15,549 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 88 flow. Second operand 4 states and 1382 transitions. [2022-11-25 17:53:15,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 265 flow [2022-11-25 17:53:15,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 56 transitions, 255 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 17:53:15,551 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 92 flow [2022-11-25 17:53:15,552 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2022-11-25 17:53:15,552 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2022-11-25 17:53:15,553 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 92 flow [2022-11-25 17:53:15,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 336.2) internal successors, (1681), 5 states have internal predecessors, (1681), 0 states have call successors, (0), 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 17:53:15,554 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:15,554 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:15,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:53:15,555 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 17:53:15,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:15,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2142137329, now seen corresponding path program 1 times [2022-11-25 17:53:15,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:15,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424044306] [2022-11-25 17:53:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:15,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:53:16,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:16,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424044306] [2022-11-25 17:53:16,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424044306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:53:16,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:53:16,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:53:16,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522383352] [2022-11-25 17:53:16,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:53:16,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:53:16,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:16,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:53:16,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:53:16,111 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 793 [2022-11-25 17:53:16,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 337.5) internal successors, (1350), 4 states have internal predecessors, (1350), 0 states have call successors, (0), 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 17:53:16,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:16,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 793 [2022-11-25 17:53:16,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:16,371 INFO L130 PetriNetUnfolder]: 462/680 cut-off events. [2022-11-25 17:53:16,372 INFO L131 PetriNetUnfolder]: For 220/220 co-relation queries the response was YES. [2022-11-25 17:53:16,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 680 events. 462/680 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2145 event pairs, 183 based on Foata normal form. 1/509 useless extension candidates. Maximal degree in co-relation 1602. Up to 416 conditions per place. [2022-11-25 17:53:16,376 INFO L137 encePairwiseOnDemand]: 789/793 looper letters, 39 selfloop transitions, 2 changer transitions 16/57 dead transitions. [2022-11-25 17:53:16,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 57 transitions, 290 flow [2022-11-25 17:53:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:53:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:53:16,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1380 transitions. [2022-11-25 17:53:16,380 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43505674653215637 [2022-11-25 17:53:16,381 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1380 transitions. [2022-11-25 17:53:16,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1380 transitions. [2022-11-25 17:53:16,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:16,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1380 transitions. [2022-11-25 17:53:16,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 0 states have call successors, (0), 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 17:53:16,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 793.0) internal successors, (3965), 5 states have internal predecessors, (3965), 0 states have call successors, (0), 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 17:53:16,394 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 793.0) internal successors, (3965), 5 states have internal predecessors, (3965), 0 states have call successors, (0), 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 17:53:16,394 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 92 flow. Second operand 4 states and 1380 transitions. [2022-11-25 17:53:16,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 57 transitions, 290 flow [2022-11-25 17:53:16,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 276 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-25 17:53:16,397 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 100 flow [2022-11-25 17:53:16,397 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, 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=4, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2022-11-25 17:53:16,398 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2022-11-25 17:53:16,398 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 100 flow [2022-11-25 17:53:16,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 337.5) internal successors, (1350), 4 states have internal predecessors, (1350), 0 states have call successors, (0), 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 17:53:16,399 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:16,400 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 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 17:53:16,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:53:16,400 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 17:53:16,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:16,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1432133639, now seen corresponding path program 1 times [2022-11-25 17:53:16,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:16,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409107207] [2022-11-25 17:53:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:16,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:19,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:19,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409107207] [2022-11-25 17:53:19,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409107207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:19,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679752631] [2022-11-25 17:53:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:19,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:19,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:19,504 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:19,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:53:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:19,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 17:53:19,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:20,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:20,372 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 41 treesize of output 41 [2022-11-25 17:53:20,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 100 [2022-11-25 17:53:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:53:21,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:23,031 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:23,031 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 98 treesize of output 72 [2022-11-25 17:53:23,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-25 17:53:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:53:23,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679752631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:23,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:23,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 37 [2022-11-25 17:53:23,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589346369] [2022-11-25 17:53:23,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:23,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 17:53:23,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:23,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 17:53:23,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1352, Unknown=3, NotChecked=0, Total=1482 [2022-11-25 17:53:29,804 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 793 [2022-11-25 17:53:29,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 100 flow. Second operand has 39 states, 39 states have (on average 242.82051282051282) internal successors, (9470), 39 states have internal predecessors, (9470), 0 states have call successors, (0), 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 17:53:29,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:29,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 793 [2022-11-25 17:53:29,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:41,364 INFO L130 PetriNetUnfolder]: 1249/1929 cut-off events. [2022-11-25 17:53:41,365 INFO L131 PetriNetUnfolder]: For 577/577 co-relation queries the response was YES. [2022-11-25 17:53:41,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4912 conditions, 1929 events. 1249/1929 cut-off events. For 577/577 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8657 event pairs, 129 based on Foata normal form. 5/1428 useless extension candidates. Maximal degree in co-relation 4886. Up to 490 conditions per place. [2022-11-25 17:53:41,378 INFO L137 encePairwiseOnDemand]: 781/793 looper letters, 238 selfloop transitions, 90 changer transitions 28/356 dead transitions. [2022-11-25 17:53:41,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 356 transitions, 1713 flow [2022-11-25 17:53:41,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 17:53:41,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-25 17:53:41,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 10237 transitions. [2022-11-25 17:53:41,406 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31485867191584904 [2022-11-25 17:53:41,407 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 10237 transitions. [2022-11-25 17:53:41,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 10237 transitions. [2022-11-25 17:53:41,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:41,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 10237 transitions. [2022-11-25 17:53:41,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 249.6829268292683) internal successors, (10237), 41 states have internal predecessors, (10237), 0 states have call successors, (0), 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 17:53:41,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 793.0) internal successors, (33306), 42 states have internal predecessors, (33306), 0 states have call successors, (0), 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 17:53:41,541 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 793.0) internal successors, (33306), 42 states have internal predecessors, (33306), 0 states have call successors, (0), 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 17:53:41,542 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 100 flow. Second operand 41 states and 10237 transitions. [2022-11-25 17:53:41,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 356 transitions, 1713 flow [2022-11-25 17:53:41,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 356 transitions, 1656 flow, removed 21 selfloop flow, removed 2 redundant places. [2022-11-25 17:53:41,555 INFO L231 Difference]: Finished difference. Result has 99 places, 125 transitions, 779 flow [2022-11-25 17:53:41,555 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=779, PETRI_PLACES=99, PETRI_TRANSITIONS=125} [2022-11-25 17:53:41,559 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2022-11-25 17:53:41,560 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 125 transitions, 779 flow [2022-11-25 17:53:41,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 242.82051282051282) internal successors, (9470), 39 states have internal predecessors, (9470), 0 states have call successors, (0), 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 17:53:41,572 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:41,572 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 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 17:53:41,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:41,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:41,779 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 17:53:41,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:41,780 INFO L85 PathProgramCache]: Analyzing trace with hash 838195317, now seen corresponding path program 2 times [2022-11-25 17:53:41,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:41,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496830978] [2022-11-25 17:53:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:41,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:53:43,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:43,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496830978] [2022-11-25 17:53:43,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496830978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:43,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642061261] [2022-11-25 17:53:43,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:53:43,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:43,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:43,275 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:43,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:53:43,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:53:43,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:53:43,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 17:53:43,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:43,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:43,892 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 83 treesize of output 77 [2022-11-25 17:53:44,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 130 [2022-11-25 17:53:45,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:53:45,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:46,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:46,514 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 221 treesize of output 143 [2022-11-25 17:53:46,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-11-25 17:53:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:53:46,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642061261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:46,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:46,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2022-11-25 17:53:46,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086296865] [2022-11-25 17:53:46,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:46,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 17:53:46,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:46,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 17:53:46,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=949, Unknown=3, NotChecked=0, Total=1056 [2022-11-25 17:53:53,520 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 793 [2022-11-25 17:53:53,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 125 transitions, 779 flow. Second operand has 33 states, 33 states have (on average 254.0909090909091) internal successors, (8385), 33 states have internal predecessors, (8385), 0 states have call successors, (0), 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 17:53:53,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:53,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 793 [2022-11-25 17:53:53,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:19,135 INFO L130 PetriNetUnfolder]: 3517/5818 cut-off events. [2022-11-25 17:54:19,135 INFO L131 PetriNetUnfolder]: For 72811/72811 co-relation queries the response was YES. [2022-11-25 17:54:19,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31041 conditions, 5818 events. 3517/5818 cut-off events. For 72811/72811 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 36069 event pairs, 54 based on Foata normal form. 16/5104 useless extension candidates. Maximal degree in co-relation 30990. Up to 1511 conditions per place. [2022-11-25 17:54:19,208 INFO L137 encePairwiseOnDemand]: 781/793 looper letters, 428 selfloop transitions, 362 changer transitions 133/923 dead transitions. [2022-11-25 17:54:19,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 923 transitions, 7702 flow [2022-11-25 17:54:19,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-25 17:54:19,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-11-25 17:54:19,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 20580 transitions. [2022-11-25 17:54:19,268 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3285073507111274 [2022-11-25 17:54:19,269 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 20580 transitions. [2022-11-25 17:54:19,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 20580 transitions. [2022-11-25 17:54:19,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:54:19,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 20580 transitions. [2022-11-25 17:54:19,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 260.50632911392404) internal successors, (20580), 79 states have internal predecessors, (20580), 0 states have call successors, (0), 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 17:54:19,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 793.0) internal successors, (63440), 80 states have internal predecessors, (63440), 0 states have call successors, (0), 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 17:54:19,514 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 793.0) internal successors, (63440), 80 states have internal predecessors, (63440), 0 states have call successors, (0), 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 17:54:19,514 INFO L175 Difference]: Start difference. First operand has 99 places, 125 transitions, 779 flow. Second operand 79 states and 20580 transitions. [2022-11-25 17:54:19,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 923 transitions, 7702 flow [2022-11-25 17:54:19,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 923 transitions, 6891 flow, removed 341 selfloop flow, removed 7 redundant places. [2022-11-25 17:54:19,669 INFO L231 Difference]: Finished difference. Result has 203 places, 475 transitions, 4753 flow [2022-11-25 17:54:19,669 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=4753, PETRI_PLACES=203, PETRI_TRANSITIONS=475} [2022-11-25 17:54:19,670 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 173 predicate places. [2022-11-25 17:54:19,670 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 475 transitions, 4753 flow [2022-11-25 17:54:19,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 254.0909090909091) internal successors, (8385), 33 states have internal predecessors, (8385), 0 states have call successors, (0), 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 17:54:19,672 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:19,672 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 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 17:54:19,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:19,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 17:54:19,878 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 17:54:19,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:19,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1558142809, now seen corresponding path program 3 times [2022-11-25 17:54:19,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:19,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785059096] [2022-11-25 17:54:19,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:19,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:54:21,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:54:21,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785059096] [2022-11-25 17:54:21,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785059096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:54:21,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633756355] [2022-11-25 17:54:21,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:54:21,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:21,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:54:21,185 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:54:21,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:54:21,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:54:21,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:54:21,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 17:54:21,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:21,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:54:21,702 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 79 treesize of output 71 [2022-11-25 17:54:21,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:54:21,884 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 79 treesize of output 71 [2022-11-25 17:54:22,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 100 [2022-11-25 17:54:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:54:22,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:54:24,258 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:24,259 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 311 treesize of output 245 [2022-11-25 17:54:24,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 166 [2022-11-25 17:54:24,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 158 [2022-11-25 17:54:24,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 154 [2022-11-25 17:54:24,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 152 [2022-11-25 17:54:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:54:24,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633756355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:54:24,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:54:24,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 33 [2022-11-25 17:54:24,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204401651] [2022-11-25 17:54:24,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:54:24,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:54:24,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:54:24,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:54:24,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1068, Unknown=7, NotChecked=0, Total=1190 [2022-11-25 17:54:29,929 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 793 [2022-11-25 17:54:29,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 475 transitions, 4753 flow. Second operand has 35 states, 35 states have (on average 250.97142857142856) internal successors, (8784), 35 states have internal predecessors, (8784), 0 states have call successors, (0), 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 17:54:29,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:54:29,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 793 [2022-11-25 17:54:29,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:45,672 INFO L130 PetriNetUnfolder]: 4331/7122 cut-off events. [2022-11-25 17:54:45,672 INFO L131 PetriNetUnfolder]: For 127202/127202 co-relation queries the response was YES. [2022-11-25 17:54:45,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45016 conditions, 7122 events. 4331/7122 cut-off events. For 127202/127202 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 45234 event pairs, 321 based on Foata normal form. 31/6949 useless extension candidates. Maximal degree in co-relation 44933. Up to 1867 conditions per place. [2022-11-25 17:54:45,762 INFO L137 encePairwiseOnDemand]: 782/793 looper letters, 575 selfloop transitions, 438 changer transitions 137/1150 dead transitions. [2022-11-25 17:54:45,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 1150 transitions, 14975 flow [2022-11-25 17:54:45,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-25 17:54:45,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-25 17:54:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 13099 transitions. [2022-11-25 17:54:45,785 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3238879410528398 [2022-11-25 17:54:45,785 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 13099 transitions. [2022-11-25 17:54:45,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 13099 transitions. [2022-11-25 17:54:45,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:54:45,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 13099 transitions. [2022-11-25 17:54:45,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 256.84313725490193) internal successors, (13099), 51 states have internal predecessors, (13099), 0 states have call successors, (0), 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 17:54:45,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 793.0) internal successors, (41236), 52 states have internal predecessors, (41236), 0 states have call successors, (0), 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 17:54:45,851 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 793.0) internal successors, (41236), 52 states have internal predecessors, (41236), 0 states have call successors, (0), 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 17:54:45,852 INFO L175 Difference]: Start difference. First operand has 203 places, 475 transitions, 4753 flow. Second operand 51 states and 13099 transitions. [2022-11-25 17:54:45,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 1150 transitions, 14975 flow [2022-11-25 17:54:48,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 1150 transitions, 9089 flow, removed 2904 selfloop flow, removed 17 redundant places. [2022-11-25 17:54:48,722 INFO L231 Difference]: Finished difference. Result has 253 places, 671 transitions, 5719 flow [2022-11-25 17:54:48,723 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=2864, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=5719, PETRI_PLACES=253, PETRI_TRANSITIONS=671} [2022-11-25 17:54:48,724 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 223 predicate places. [2022-11-25 17:54:48,724 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 671 transitions, 5719 flow [2022-11-25 17:54:48,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 250.97142857142856) internal successors, (8784), 35 states have internal predecessors, (8784), 0 states have call successors, (0), 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 17:54:48,726 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:48,726 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 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 17:54:48,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:48,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:48,934 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 17:54:48,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:48,934 INFO L85 PathProgramCache]: Analyzing trace with hash -960888827, now seen corresponding path program 4 times [2022-11-25 17:54:48,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:48,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469391228] [2022-11-25 17:54:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:48,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:54:50,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:54:50,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469391228] [2022-11-25 17:54:50,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469391228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:54:50,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065827058] [2022-11-25 17:54:50,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:54:50,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:50,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:54:50,331 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:54:50,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:54:50,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:54:50,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:54:50,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 17:54:50,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:51,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 99 [2022-11-25 17:54:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:54:51,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:54:52,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:52,062 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 203 treesize of output 111 [2022-11-25 17:54:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:54:52,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065827058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:54:52,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:54:52,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2022-11-25 17:54:52,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541661455] [2022-11-25 17:54:52,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:54:52,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:54:52,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:54:52,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:54:52,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-11-25 17:54:55,300 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 793 [2022-11-25 17:54:55,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 671 transitions, 5719 flow. Second operand has 26 states, 26 states have (on average 297.65384615384613) internal successors, (7739), 26 states have internal predecessors, (7739), 0 states have call successors, (0), 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 17:54:55,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:54:55,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 793 [2022-11-25 17:54:55,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:06,025 INFO L130 PetriNetUnfolder]: 6336/10210 cut-off events. [2022-11-25 17:55:06,025 INFO L131 PetriNetUnfolder]: For 64524/64524 co-relation queries the response was YES. [2022-11-25 17:55:06,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53425 conditions, 10210 events. 6336/10210 cut-off events. For 64524/64524 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 66912 event pairs, 407 based on Foata normal form. 12/9346 useless extension candidates. Maximal degree in co-relation 53327. Up to 2323 conditions per place. [2022-11-25 17:55:06,200 INFO L137 encePairwiseOnDemand]: 781/793 looper letters, 612 selfloop transitions, 879 changer transitions 82/1573 dead transitions. [2022-11-25 17:55:06,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 1573 transitions, 16707 flow [2022-11-25 17:55:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-25 17:55:06,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-25 17:55:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 19322 transitions. [2022-11-25 17:55:06,226 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3807140605296343 [2022-11-25 17:55:06,226 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 19322 transitions. [2022-11-25 17:55:06,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 19322 transitions. [2022-11-25 17:55:06,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:06,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 19322 transitions. [2022-11-25 17:55:06,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 301.90625) internal successors, (19322), 64 states have internal predecessors, (19322), 0 states have call successors, (0), 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 17:55:06,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 793.0) internal successors, (51545), 65 states have internal predecessors, (51545), 0 states have call successors, (0), 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 17:55:06,314 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 793.0) internal successors, (51545), 65 states have internal predecessors, (51545), 0 states have call successors, (0), 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 17:55:06,314 INFO L175 Difference]: Start difference. First operand has 253 places, 671 transitions, 5719 flow. Second operand 64 states and 19322 transitions. [2022-11-25 17:55:06,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 1573 transitions, 16707 flow [2022-11-25 17:55:07,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1573 transitions, 15670 flow, removed 463 selfloop flow, removed 16 redundant places. [2022-11-25 17:55:07,385 INFO L231 Difference]: Finished difference. Result has 325 places, 1176 transitions, 13114 flow [2022-11-25 17:55:07,385 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=5231, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=13114, PETRI_PLACES=325, PETRI_TRANSITIONS=1176} [2022-11-25 17:55:07,386 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 295 predicate places. [2022-11-25 17:55:07,386 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 1176 transitions, 13114 flow [2022-11-25 17:55:07,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 297.65384615384613) internal successors, (7739), 26 states have internal predecessors, (7739), 0 states have call successors, (0), 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 17:55:07,387 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:07,388 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 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 17:55:07,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:55:07,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:07,588 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 17:55:07,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:07,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1815667927, now seen corresponding path program 5 times [2022-11-25 17:55:07,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:07,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644474898] [2022-11-25 17:55:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:07,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:55:08,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:08,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644474898] [2022-11-25 17:55:08,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644474898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:55:08,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000379571] [2022-11-25 17:55:08,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:55:08,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:08,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:55:08,733 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:55:08,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:55:08,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:55:08,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:55:08,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 17:55:08,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:55:09,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 126 [2022-11-25 17:55:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:55:10,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:55:11,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:55:11,697 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 223 treesize of output 123 [2022-11-25 17:55:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:55:11,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000379571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:55:11,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:55:11,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2022-11-25 17:55:11,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306039069] [2022-11-25 17:55:11,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:55:11,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:55:11,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:11,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:55:11,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-11-25 17:55:15,159 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 793 [2022-11-25 17:55:15,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 1176 transitions, 13114 flow. Second operand has 28 states, 28 states have (on average 288.25) internal successors, (8071), 28 states have internal predecessors, (8071), 0 states have call successors, (0), 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 17:55:15,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:15,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 793 [2022-11-25 17:55:15,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:32,046 INFO L130 PetriNetUnfolder]: 9615/15937 cut-off events. [2022-11-25 17:55:32,046 INFO L131 PetriNetUnfolder]: For 161635/161635 co-relation queries the response was YES. [2022-11-25 17:55:32,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100052 conditions, 15937 events. 9615/15937 cut-off events. For 161635/161635 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 117323 event pairs, 1539 based on Foata normal form. 11/15134 useless extension candidates. Maximal degree in co-relation 99925. Up to 6761 conditions per place. [2022-11-25 17:55:32,476 INFO L137 encePairwiseOnDemand]: 781/793 looper letters, 1575 selfloop transitions, 695 changer transitions 52/2322 dead transitions. [2022-11-25 17:55:32,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 2322 transitions, 30674 flow [2022-11-25 17:55:32,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-25 17:55:32,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-25 17:55:32,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 15339 transitions. [2022-11-25 17:55:32,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.371980793481424 [2022-11-25 17:55:32,504 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 15339 transitions. [2022-11-25 17:55:32,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 15339 transitions. [2022-11-25 17:55:32,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:32,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 15339 transitions. [2022-11-25 17:55:32,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 294.9807692307692) internal successors, (15339), 52 states have internal predecessors, (15339), 0 states have call successors, (0), 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 17:55:32,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 793.0) internal successors, (42029), 53 states have internal predecessors, (42029), 0 states have call successors, (0), 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 17:55:32,598 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 793.0) internal successors, (42029), 53 states have internal predecessors, (42029), 0 states have call successors, (0), 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 17:55:32,598 INFO L175 Difference]: Start difference. First operand has 325 places, 1176 transitions, 13114 flow. Second operand 52 states and 15339 transitions. [2022-11-25 17:55:32,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 2322 transitions, 30674 flow [2022-11-25 17:55:37,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 2322 transitions, 27903 flow, removed 1385 selfloop flow, removed 11 redundant places. [2022-11-25 17:55:37,434 INFO L231 Difference]: Finished difference. Result has 396 places, 1554 transitions, 18655 flow [2022-11-25 17:55:37,435 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=11935, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=18655, PETRI_PLACES=396, PETRI_TRANSITIONS=1554} [2022-11-25 17:55:37,436 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 366 predicate places. [2022-11-25 17:55:37,436 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 1554 transitions, 18655 flow [2022-11-25 17:55:37,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 288.25) internal successors, (8071), 28 states have internal predecessors, (8071), 0 states have call successors, (0), 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 17:55:37,437 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:37,437 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 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 17:55:37,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:55:37,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:37,643 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 17:55:37,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:37,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1059795467, now seen corresponding path program 6 times [2022-11-25 17:55:37,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:37,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094956375] [2022-11-25 17:55:37,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:37,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:55:39,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:39,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094956375] [2022-11-25 17:55:39,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094956375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:55:39,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631774967] [2022-11-25 17:55:39,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:55:39,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:39,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:55:39,078 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:55:39,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:55:39,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:55:39,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:55:39,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 17:55:39,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:55:39,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 152 [2022-11-25 17:55:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:55:41,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:55:42,233 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:55:42,233 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 180 treesize of output 112 [2022-11-25 17:55:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:55:42,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631774967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:55:42,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:55:42,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 29 [2022-11-25 17:55:42,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878785256] [2022-11-25 17:55:42,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:55:42,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 17:55:42,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:42,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 17:55:42,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-11-25 17:55:47,789 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 793 [2022-11-25 17:55:47,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 1554 transitions, 18655 flow. Second operand has 30 states, 30 states have (on average 288.3) internal successors, (8649), 30 states have internal predecessors, (8649), 0 states have call successors, (0), 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 17:55:47,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:47,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 793 [2022-11-25 17:55:47,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:56:15,150 INFO L130 PetriNetUnfolder]: 13538/23370 cut-off events. [2022-11-25 17:56:15,150 INFO L131 PetriNetUnfolder]: For 275832/275832 co-relation queries the response was YES. [2022-11-25 17:56:15,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149231 conditions, 23370 events. 13538/23370 cut-off events. For 275832/275832 co-relation queries the response was YES. Maximal size of possible extension queue 1364. Compared 193594 event pairs, 2487 based on Foata normal form. 12/22326 useless extension candidates. Maximal degree in co-relation 149074. Up to 7747 conditions per place. [2022-11-25 17:56:15,854 INFO L137 encePairwiseOnDemand]: 781/793 looper letters, 1839 selfloop transitions, 967 changer transitions 55/2861 dead transitions. [2022-11-25 17:56:15,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 2861 transitions, 38904 flow [2022-11-25 17:56:15,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-25 17:56:15,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-11-25 17:56:15,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 20008 transitions. [2022-11-25 17:56:15,877 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37104072398190047 [2022-11-25 17:56:15,877 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 20008 transitions. [2022-11-25 17:56:15,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 20008 transitions. [2022-11-25 17:56:15,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:56:15,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 20008 transitions. [2022-11-25 17:56:16,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 294.2352941176471) internal successors, (20008), 68 states have internal predecessors, (20008), 0 states have call successors, (0), 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 17:56:16,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 793.0) internal successors, (54717), 69 states have internal predecessors, (54717), 0 states have call successors, (0), 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 17:56:16,070 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 793.0) internal successors, (54717), 69 states have internal predecessors, (54717), 0 states have call successors, (0), 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 17:56:16,071 INFO L175 Difference]: Start difference. First operand has 396 places, 1554 transitions, 18655 flow. Second operand 68 states and 20008 transitions. [2022-11-25 17:56:16,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 2861 transitions, 38904 flow [2022-11-25 17:56:24,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 2861 transitions, 37848 flow, removed 511 selfloop flow, removed 8 redundant places. [2022-11-25 17:56:25,036 INFO L231 Difference]: Finished difference. Result has 490 places, 1951 transitions, 26637 flow [2022-11-25 17:56:25,038 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=18022, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=606, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=26637, PETRI_PLACES=490, PETRI_TRANSITIONS=1951} [2022-11-25 17:56:25,039 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 460 predicate places. [2022-11-25 17:56:25,039 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 1951 transitions, 26637 flow [2022-11-25 17:56:25,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 288.3) internal successors, (8649), 30 states have internal predecessors, (8649), 0 states have call successors, (0), 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 17:56:25,040 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:56:25,040 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 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 17:56:25,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:56:25,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:56:25,243 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 17:56:25,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:56:25,243 INFO L85 PathProgramCache]: Analyzing trace with hash 925586771, now seen corresponding path program 7 times [2022-11-25 17:56:25,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:56:25,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68677597] [2022-11-25 17:56:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:56:25,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:56:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:56:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:56:26,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:56:26,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68677597] [2022-11-25 17:56:26,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68677597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:56:26,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638035223] [2022-11-25 17:56:26,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:56:26,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:56:26,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:56:26,384 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:56:26,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:56:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:56:26,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 17:56:26,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:56:26,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 97 [2022-11-25 17:56:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:56:27,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:56:28,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:28,681 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 176 treesize of output 108 [2022-11-25 17:56:28,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:56:28,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638035223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:56:28,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:56:28,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 25 [2022-11-25 17:56:28,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132846543] [2022-11-25 17:56:28,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:56:28,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:56:28,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:56:28,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:56:28,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-11-25 17:56:33,651 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 793 [2022-11-25 17:56:33,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 1951 transitions, 26637 flow. Second operand has 26 states, 26 states have (on average 288.4230769230769) internal successors, (7499), 26 states have internal predecessors, (7499), 0 states have call successors, (0), 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 17:56:33,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:56:33,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 793 [2022-11-25 17:56:33,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:57:01,366 INFO L130 PetriNetUnfolder]: 16125/27713 cut-off events. [2022-11-25 17:57:01,366 INFO L131 PetriNetUnfolder]: For 419705/419705 co-relation queries the response was YES. [2022-11-25 17:57:02,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189027 conditions, 27713 events. 16125/27713 cut-off events. For 419705/419705 co-relation queries the response was YES. Maximal size of possible extension queue 1621. Compared 233192 event pairs, 3459 based on Foata normal form. 22/26905 useless extension candidates. Maximal degree in co-relation 188836. Up to 9757 conditions per place. [2022-11-25 17:57:02,442 INFO L137 encePairwiseOnDemand]: 780/793 looper letters, 1371 selfloop transitions, 1227 changer transitions 87/2685 dead transitions. [2022-11-25 17:57:02,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 2685 transitions, 41802 flow [2022-11-25 17:57:02,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-25 17:57:02,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-11-25 17:57:02,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 13827 transitions. [2022-11-25 17:57:02,466 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3709854846931931 [2022-11-25 17:57:02,466 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 13827 transitions. [2022-11-25 17:57:02,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 13827 transitions. [2022-11-25 17:57:02,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:57:02,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 13827 transitions. [2022-11-25 17:57:02,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 294.1914893617021) internal successors, (13827), 47 states have internal predecessors, (13827), 0 states have call successors, (0), 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 17:57:02,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 793.0) internal successors, (38064), 48 states have internal predecessors, (38064), 0 states have call successors, (0), 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 17:57:02,543 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 793.0) internal successors, (38064), 48 states have internal predecessors, (38064), 0 states have call successors, (0), 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 17:57:02,543 INFO L175 Difference]: Start difference. First operand has 490 places, 1951 transitions, 26637 flow. Second operand 47 states and 13827 transitions. [2022-11-25 17:57:02,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 2685 transitions, 41802 flow [2022-11-25 17:57:17,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 2685 transitions, 39127 flow, removed 1223 selfloop flow, removed 23 redundant places. [2022-11-25 17:57:17,109 INFO L231 Difference]: Finished difference. Result has 527 places, 2170 transitions, 31761 flow [2022-11-25 17:57:17,110 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=24865, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1951, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=994, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=875, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=31761, PETRI_PLACES=527, PETRI_TRANSITIONS=2170} [2022-11-25 17:57:17,111 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 497 predicate places. [2022-11-25 17:57:17,111 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 2170 transitions, 31761 flow [2022-11-25 17:57:17,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 288.4230769230769) internal successors, (7499), 26 states have internal predecessors, (7499), 0 states have call successors, (0), 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 17:57:17,113 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:57:17,113 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 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 17:57:17,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:57:17,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:57:17,323 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 17:57:17,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:57:17,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1626803337, now seen corresponding path program 8 times [2022-11-25 17:57:17,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:57:17,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279088473] [2022-11-25 17:57:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:57:17,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:57:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:57:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:57:18,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:57:18,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279088473] [2022-11-25 17:57:18,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279088473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:57:18,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030240989] [2022-11-25 17:57:18,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:57:18,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:57:18,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:57:18,391 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:57:18,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7f910b5-6bba-470e-8154-32f0b7d43d2b/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:57:18,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:57:18,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:57:18,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 17:57:18,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:57:19,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 120 [2022-11-25 17:57:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:57:19,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:57:21,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:57:21,053 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 247 treesize of output 147 [2022-11-25 17:57:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:57:21,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030240989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:57:21,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:57:21,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 27 [2022-11-25 17:57:21,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606294373] [2022-11-25 17:57:21,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:57:21,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:57:21,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:57:21,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:57:21,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-11-25 17:57:24,768 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 793 [2022-11-25 17:57:24,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 2170 transitions, 31761 flow. Second operand has 28 states, 28 states have (on average 287.4642857142857) internal successors, (8049), 28 states have internal predecessors, (8049), 0 states have call successors, (0), 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 17:57:24,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:57:24,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 793 [2022-11-25 17:57:24,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand