./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ --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 fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 --- 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-dbf71c6-m [2022-10-17 10:18:27,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:18:27,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:18:27,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:18:27,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:18:27,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:18:27,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:18:27,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:18:27,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:18:27,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:18:27,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:18:27,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:18:27,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:18:27,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:18:27,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:18:27,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:18:27,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:18:27,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:18:27,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:18:27,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:18:27,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:18:27,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:18:27,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:18:27,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:18:27,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:18:27,199 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:18:27,199 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:18:27,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:18:27,202 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:18:27,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:18:27,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:18:27,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:18:27,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:18:27,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:18:27,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:18:27,211 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:18:27,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:18:27,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:18:27,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:18:27,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:18:27,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:18:27,216 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:18:27,259 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:18:27,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:18:27,260 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:18:27,260 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:18:27,261 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:18:27,261 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:18:27,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:18:27,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:18:27,263 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:18:27,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:18:27,264 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:18:27,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:18:27,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:18:27,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:18:27,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:18:27,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:18:27,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:18:27,266 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:18:27,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:18:27,267 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:18:27,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:18:27,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:18:27,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:18:27,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:18:27,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:18:27,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:18:27,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:18:27,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:18:27,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:18:27,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:18:27,271 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:18:27,271 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:18:27,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:18:27,283 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 [2022-10-17 10:18:27,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:18:27,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:18:27,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:18:27,628 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:18:27,629 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:18:27,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/weaver/test-easy1.wvr.c [2022-10-17 10:18:27,705 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/data/45d853d0c/c5349e661ba548adb594b4dd4c1eaf7e/FLAG025dbe4c4 [2022-10-17 10:18:28,150 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:18:28,150 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/sv-benchmarks/c/weaver/test-easy1.wvr.c [2022-10-17 10:18:28,157 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/data/45d853d0c/c5349e661ba548adb594b4dd4c1eaf7e/FLAG025dbe4c4 [2022-10-17 10:18:28,526 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/data/45d853d0c/c5349e661ba548adb594b4dd4c1eaf7e [2022-10-17 10:18:28,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:18:28,531 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:18:28,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:18:28,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:18:28,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:18:28,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:18:28" (1/1) ... [2022-10-17 10:18:28,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7247b7e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:28, skipping insertion in model container [2022-10-17 10:18:28,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:18:28" (1/1) ... [2022-10-17 10:18:28,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:18:28,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:18:28,797 WARN L230 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_27a92b5f-4592-4067-896d-478f0e3bdd21/sv-benchmarks/c/weaver/test-easy1.wvr.c[1876,1889] [2022-10-17 10:18:28,801 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:18:28,810 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:18:28,830 WARN L230 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_27a92b5f-4592-4067-896d-478f0e3bdd21/sv-benchmarks/c/weaver/test-easy1.wvr.c[1876,1889] [2022-10-17 10:18:28,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:18:28,846 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:18:28,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:28 WrapperNode [2022-10-17 10:18:28,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:18:28,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:18:28,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:18:28,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:18:28,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:28" (1/1) ... [2022-10-17 10:18:28,864 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:28" (1/1) ... [2022-10-17 10:18:28,883 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2022-10-17 10:18:28,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:18:28,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:18:28,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:18:28,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:18:28,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:28" (1/1) ... [2022-10-17 10:18:28,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:28" (1/1) ... [2022-10-17 10:18:28,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:28" (1/1) ... [2022-10-17 10:18:28,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:28" (1/1) ... [2022-10-17 10:18:28,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:28" (1/1) ... [2022-10-17 10:18:28,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:28" (1/1) ... [2022-10-17 10:18:28,907 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:28" (1/1) ... [2022-10-17 10:18:28,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:28" (1/1) ... [2022-10-17 10:18:28,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:18:28,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:18:28,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:18:28,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:18:28,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:28" (1/1) ... [2022-10-17 10:18:28,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:18:28,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:18:28,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:18:28,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:18:28,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:18:28,998 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-10-17 10:18:28,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-10-17 10:18:28,998 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-10-17 10:18:28,999 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-10-17 10:18:28,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:18:28,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:18:28,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:18:28,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:18:28,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:18:29,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:18:29,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:18:29,001 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 10:18:29,093 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:18:29,095 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:18:29,333 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:18:29,341 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:18:29,348 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 10:18:29,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:18:29 BoogieIcfgContainer [2022-10-17 10:18:29,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:18:29,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:18:29,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:18:29,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:18:29,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:18:28" (1/3) ... [2022-10-17 10:18:29,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122843fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:18:29, skipping insertion in model container [2022-10-17 10:18:29,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:28" (2/3) ... [2022-10-17 10:18:29,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122843fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:18:29, skipping insertion in model container [2022-10-17 10:18:29,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:18:29" (3/3) ... [2022-10-17 10:18:29,368 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2022-10-17 10:18:29,377 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:18:29,389 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:18:29,389 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:18:29,389 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:18:29,465 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-10-17 10:18:29,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-10-17 10:18:29,565 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2022-10-17 10:18:29,565 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:18:29,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-10-17 10:18:29,569 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-10-17 10:18:29,582 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-10-17 10:18:29,596 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:18:29,604 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;@73bce63c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:18:29,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-10-17 10:18:29,656 INFO L130 PetriNetUnfolder]: 6/72 cut-off events. [2022-10-17 10:18:29,656 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:18:29,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:29,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:29,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:18:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:29,668 INFO L85 PathProgramCache]: Analyzing trace with hash 677943601, now seen corresponding path program 1 times [2022-10-17 10:18:29,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:29,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234560162] [2022-10-17 10:18:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:29,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:30,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:30,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234560162] [2022-10-17 10:18:30,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234560162] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:30,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:30,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:18:30,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636014997] [2022-10-17 10:18:30,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:30,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:18:30,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:30,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:18:30,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:18:30,066 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 84 [2022-10-17 10:18:30,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:30,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:30,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 84 [2022-10-17 10:18:30,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:30,114 INFO L130 PetriNetUnfolder]: 2/69 cut-off events. [2022-10-17 10:18:30,115 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-10-17 10:18:30,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 69 events. 2/69 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 36 event pairs, 0 based on Foata normal form. 6/71 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2022-10-17 10:18:30,118 INFO L137 encePairwiseOnDemand]: 80/84 looper letters, 4 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2022-10-17 10:18:30,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 158 flow [2022-10-17 10:18:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:18:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-10-17 10:18:30,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 158 transitions. [2022-10-17 10:18:30,133 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9404761904761905 [2022-10-17 10:18:30,134 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 158 transitions. [2022-10-17 10:18:30,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 158 transitions. [2022-10-17 10:18:30,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:30,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 158 transitions. [2022-10-17 10:18:30,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:30,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:30,147 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:30,149 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 158 transitions. [2022-10-17 10:18:30,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 158 flow [2022-10-17 10:18:30,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-10-17 10:18:30,158 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2022-10-17 10:18:30,161 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2022-10-17 10:18:30,165 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-10-17 10:18:30,165 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2022-10-17 10:18:30,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:30,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:30,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:30,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:18:30,167 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:18:30,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:30,167 INFO L85 PathProgramCache]: Analyzing trace with hash 807026320, now seen corresponding path program 1 times [2022-10-17 10:18:30,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:30,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340628543] [2022-10-17 10:18:30,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:30,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:30,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:30,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340628543] [2022-10-17 10:18:30,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340628543] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:30,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:30,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:18:30,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696859753] [2022-10-17 10:18:30,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:30,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:18:30,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:30,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:18:30,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:18:30,814 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-10-17 10:18:30,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:30,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:30,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-10-17 10:18:30,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:31,111 INFO L130 PetriNetUnfolder]: 62/212 cut-off events. [2022-10-17 10:18:31,118 INFO L131 PetriNetUnfolder]: For 11/23 co-relation queries the response was YES. [2022-10-17 10:18:31,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 212 events. 62/212 cut-off events. For 11/23 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 733 event pairs, 30 based on Foata normal form. 2/178 useless extension candidates. Maximal degree in co-relation 352. Up to 85 conditions per place. [2022-10-17 10:18:31,124 INFO L137 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2022-10-17 10:18:31,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 245 flow [2022-10-17 10:18:31,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:18:31,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-10-17 10:18:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 410 transitions. [2022-10-17 10:18:31,137 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6972789115646258 [2022-10-17 10:18:31,138 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 410 transitions. [2022-10-17 10:18:31,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 410 transitions. [2022-10-17 10:18:31,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:31,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 410 transitions. [2022-10-17 10:18:31,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.57142857142857) internal successors, (410), 7 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:31,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:31,148 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:31,149 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 7 states and 410 transitions. [2022-10-17 10:18:31,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 245 flow [2022-10-17 10:18:31,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 245 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:18:31,151 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 165 flow [2022-10-17 10:18:31,152 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2022-10-17 10:18:31,153 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2022-10-17 10:18:31,153 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 165 flow [2022-10-17 10:18:31,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:31,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:31,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:31,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:18:31,155 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:18:31,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:31,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1765181749, now seen corresponding path program 1 times [2022-10-17 10:18:31,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:31,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871471582] [2022-10-17 10:18:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:31,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:31,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:31,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871471582] [2022-10-17 10:18:31,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871471582] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:18:31,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70461244] [2022-10-17 10:18:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:31,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:31,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:18:31,382 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:18:31,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:18:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:31,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 10:18:31,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:18:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:31,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:18:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:31,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70461244] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:18:31,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:18:31,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-10-17 10:18:31,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103326948] [2022-10-17 10:18:31,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:31,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:18:31,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:31,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:18:31,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:18:31,947 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-10-17 10:18:31,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:31,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:31,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-10-17 10:18:31,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:32,125 INFO L130 PetriNetUnfolder]: 62/253 cut-off events. [2022-10-17 10:18:32,125 INFO L131 PetriNetUnfolder]: For 25/32 co-relation queries the response was YES. [2022-10-17 10:18:32,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 253 events. 62/253 cut-off events. For 25/32 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 989 event pairs, 20 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 459. Up to 89 conditions per place. [2022-10-17 10:18:32,132 INFO L137 encePairwiseOnDemand]: 74/84 looper letters, 37 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2022-10-17 10:18:32,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 324 flow [2022-10-17 10:18:32,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:18:32,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:18:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 365 transitions. [2022-10-17 10:18:32,135 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7242063492063492 [2022-10-17 10:18:32,136 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 365 transitions. [2022-10-17 10:18:32,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 365 transitions. [2022-10-17 10:18:32,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:32,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 365 transitions. [2022-10-17 10:18:32,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.833333333333336) internal successors, (365), 6 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:32,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:32,144 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:32,145 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 165 flow. Second operand 6 states and 365 transitions. [2022-10-17 10:18:32,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 324 flow [2022-10-17 10:18:32,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 305 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-10-17 10:18:32,153 INFO L231 Difference]: Finished difference. Result has 79 places, 73 transitions, 210 flow [2022-10-17 10:18:32,154 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2022-10-17 10:18:32,157 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2022-10-17 10:18:32,157 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 210 flow [2022-10-17 10:18:32,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:32,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:32,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:32,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:18:32,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-10-17 10:18:32,381 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:18:32,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:32,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1206699963, now seen corresponding path program 1 times [2022-10-17 10:18:32,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:32,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997485290] [2022-10-17 10:18:32,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:32,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:32,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:32,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997485290] [2022-10-17 10:18:32,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997485290] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:32,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:32,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:18:32,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988227907] [2022-10-17 10:18:32,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:32,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:18:32,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:32,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:18:32,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:18:32,629 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-10-17 10:18:32,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:32,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:32,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-10-17 10:18:32,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:32,776 INFO L130 PetriNetUnfolder]: 55/228 cut-off events. [2022-10-17 10:18:32,780 INFO L131 PetriNetUnfolder]: For 141/155 co-relation queries the response was YES. [2022-10-17 10:18:32,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 228 events. 55/228 cut-off events. For 141/155 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 857 event pairs, 7 based on Foata normal form. 5/229 useless extension candidates. Maximal degree in co-relation 486. Up to 94 conditions per place. [2022-10-17 10:18:32,784 INFO L137 encePairwiseOnDemand]: 75/84 looper letters, 33 selfloop transitions, 7 changer transitions 5/88 dead transitions. [2022-10-17 10:18:32,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 356 flow [2022-10-17 10:18:32,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:18:32,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:18:32,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2022-10-17 10:18:32,787 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-10-17 10:18:32,787 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 360 transitions. [2022-10-17 10:18:32,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 360 transitions. [2022-10-17 10:18:32,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:32,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 360 transitions. [2022-10-17 10:18:32,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:32,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:32,794 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:32,795 INFO L175 Difference]: Start difference. First operand has 79 places, 73 transitions, 210 flow. Second operand 6 states and 360 transitions. [2022-10-17 10:18:32,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 88 transitions, 356 flow [2022-10-17 10:18:32,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 88 transitions, 352 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-10-17 10:18:32,803 INFO L231 Difference]: Finished difference. Result has 84 places, 75 transitions, 246 flow [2022-10-17 10:18:32,803 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2022-10-17 10:18:32,805 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2022-10-17 10:18:32,805 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 246 flow [2022-10-17 10:18:32,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:32,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:32,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:32,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:18:32,807 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:18:32,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:32,808 INFO L85 PathProgramCache]: Analyzing trace with hash 849329763, now seen corresponding path program 2 times [2022-10-17 10:18:32,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:32,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229834672] [2022-10-17 10:18:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:32,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:33,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:33,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229834672] [2022-10-17 10:18:33,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229834672] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:33,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:33,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:18:33,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44259998] [2022-10-17 10:18:33,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:33,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:18:33,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:33,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:18:33,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:18:33,038 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-10-17 10:18:33,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:33,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:33,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-10-17 10:18:33,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:33,177 INFO L130 PetriNetUnfolder]: 50/221 cut-off events. [2022-10-17 10:18:33,178 INFO L131 PetriNetUnfolder]: For 204/208 co-relation queries the response was YES. [2022-10-17 10:18:33,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 221 events. 50/221 cut-off events. For 204/208 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 751 event pairs, 9 based on Foata normal form. 8/225 useless extension candidates. Maximal degree in co-relation 500. Up to 57 conditions per place. [2022-10-17 10:18:33,180 INFO L137 encePairwiseOnDemand]: 74/84 looper letters, 33 selfloop transitions, 11 changer transitions 4/91 dead transitions. [2022-10-17 10:18:33,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 91 transitions, 402 flow [2022-10-17 10:18:33,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:18:33,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-10-17 10:18:33,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 417 transitions. [2022-10-17 10:18:33,184 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7091836734693877 [2022-10-17 10:18:33,184 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 417 transitions. [2022-10-17 10:18:33,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 417 transitions. [2022-10-17 10:18:33,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:33,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 417 transitions. [2022-10-17 10:18:33,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.57142857142857) internal successors, (417), 7 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:33,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:33,189 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:33,189 INFO L175 Difference]: Start difference. First operand has 84 places, 75 transitions, 246 flow. Second operand 7 states and 417 transitions. [2022-10-17 10:18:33,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 91 transitions, 402 flow [2022-10-17 10:18:33,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 91 transitions, 390 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-10-17 10:18:33,199 INFO L231 Difference]: Finished difference. Result has 89 places, 75 transitions, 273 flow [2022-10-17 10:18:33,199 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2022-10-17 10:18:33,202 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2022-10-17 10:18:33,202 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 273 flow [2022-10-17 10:18:33,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:33,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:33,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:33,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:18:33,204 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:18:33,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:33,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1240332628, now seen corresponding path program 1 times [2022-10-17 10:18:33,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:33,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783474144] [2022-10-17 10:18:33,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:33,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:33,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:33,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783474144] [2022-10-17 10:18:33,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783474144] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:18:33,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994720994] [2022-10-17 10:18:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:33,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:33,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:18:33,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:18:33,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:18:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:33,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-17 10:18:33,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:18:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:33,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:18:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:34,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994720994] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:18:34,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:18:34,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-10-17 10:18:34,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649708392] [2022-10-17 10:18:34,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:18:34,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-17 10:18:34,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:34,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-17 10:18:34,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-10-17 10:18:34,299 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-10-17 10:18:34,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 273 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:34,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:34,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-10-17 10:18:34,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:36,672 INFO L130 PetriNetUnfolder]: 201/617 cut-off events. [2022-10-17 10:18:36,672 INFO L131 PetriNetUnfolder]: For 891/891 co-relation queries the response was YES. [2022-10-17 10:18:36,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1724 conditions, 617 events. 201/617 cut-off events. For 891/891 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3330 event pairs, 9 based on Foata normal form. 18/630 useless extension candidates. Maximal degree in co-relation 1712. Up to 96 conditions per place. [2022-10-17 10:18:36,680 INFO L137 encePairwiseOnDemand]: 66/84 looper letters, 105 selfloop transitions, 136 changer transitions 4/286 dead transitions. [2022-10-17 10:18:36,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 286 transitions, 1774 flow [2022-10-17 10:18:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-10-17 10:18:36,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-10-17 10:18:36,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3453 transitions. [2022-10-17 10:18:36,694 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6524943310657596 [2022-10-17 10:18:36,695 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3453 transitions. [2022-10-17 10:18:36,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3453 transitions. [2022-10-17 10:18:36,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:36,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3453 transitions. [2022-10-17 10:18:36,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 54.80952380952381) internal successors, (3453), 63 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:36,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 84.0) internal successors, (5376), 64 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:36,727 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 84.0) internal successors, (5376), 64 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:36,727 INFO L175 Difference]: Start difference. First operand has 89 places, 75 transitions, 273 flow. Second operand 63 states and 3453 transitions. [2022-10-17 10:18:36,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 286 transitions, 1774 flow [2022-10-17 10:18:36,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 286 transitions, 1745 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-10-17 10:18:36,740 INFO L231 Difference]: Finished difference. Result has 165 places, 217 transitions, 1436 flow [2022-10-17 10:18:36,741 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=1436, PETRI_PLACES=165, PETRI_TRANSITIONS=217} [2022-10-17 10:18:36,742 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 91 predicate places. [2022-10-17 10:18:36,742 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 217 transitions, 1436 flow [2022-10-17 10:18:36,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:36,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:36,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:36,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:18:36,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 10:18:36,958 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:18:36,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:36,958 INFO L85 PathProgramCache]: Analyzing trace with hash -570784874, now seen corresponding path program 2 times [2022-10-17 10:18:36,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:36,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378479888] [2022-10-17 10:18:36,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:36,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:37,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:37,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378479888] [2022-10-17 10:18:37,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378479888] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:18:37,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010117946] [2022-10-17 10:18:37,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:18:37,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:37,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:18:37,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:18:37,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:18:37,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:18:37,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:18:37,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-17 10:18:37,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:18:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:37,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:18:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:37,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010117946] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:18:37,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:18:37,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-10-17 10:18:37,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810785941] [2022-10-17 10:18:37,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:18:37,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-10-17 10:18:37,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:37,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-10-17 10:18:37,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-10-17 10:18:37,845 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-10-17 10:18:37,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 217 transitions, 1436 flow. Second operand has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:37,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:37,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-10-17 10:18:37,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:38,465 INFO L130 PetriNetUnfolder]: 225/682 cut-off events. [2022-10-17 10:18:38,466 INFO L131 PetriNetUnfolder]: For 3193/3193 co-relation queries the response was YES. [2022-10-17 10:18:38,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2786 conditions, 682 events. 225/682 cut-off events. For 3193/3193 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3889 event pairs, 20 based on Foata normal form. 1/678 useless extension candidates. Maximal degree in co-relation 2755. Up to 180 conditions per place. [2022-10-17 10:18:38,477 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 80 selfloop transitions, 170 changer transitions 15/306 dead transitions. [2022-10-17 10:18:38,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 306 transitions, 2719 flow [2022-10-17 10:18:38,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-17 10:18:38,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-10-17 10:18:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1093 transitions. [2022-10-17 10:18:38,485 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6505952380952381 [2022-10-17 10:18:38,485 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1093 transitions. [2022-10-17 10:18:38,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1093 transitions. [2022-10-17 10:18:38,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:38,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1093 transitions. [2022-10-17 10:18:38,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 54.65) internal successors, (1093), 20 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:38,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:38,500 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:38,501 INFO L175 Difference]: Start difference. First operand has 165 places, 217 transitions, 1436 flow. Second operand 20 states and 1093 transitions. [2022-10-17 10:18:38,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 306 transitions, 2719 flow [2022-10-17 10:18:38,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 306 transitions, 2517 flow, removed 88 selfloop flow, removed 7 redundant places. [2022-10-17 10:18:38,553 INFO L231 Difference]: Finished difference. Result has 182 places, 270 transitions, 2130 flow [2022-10-17 10:18:38,553 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2130, PETRI_PLACES=182, PETRI_TRANSITIONS=270} [2022-10-17 10:18:38,554 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 108 predicate places. [2022-10-17 10:18:38,554 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 270 transitions, 2130 flow [2022-10-17 10:18:38,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:38,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:38,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:38,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:18:38,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:38,777 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:18:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:38,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1446740796, now seen corresponding path program 3 times [2022-10-17 10:18:38,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:38,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008396774] [2022-10-17 10:18:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:38,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:38,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:38,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008396774] [2022-10-17 10:18:38,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008396774] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:18:38,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508687563] [2022-10-17 10:18:38,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:18:39,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:39,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:18:39,001 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:18:39,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:18:39,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 10:18:39,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:18:39,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-17 10:18:39,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:18:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:39,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:18:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:39,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508687563] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:18:39,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:18:39,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-10-17 10:18:39,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730845881] [2022-10-17 10:18:39,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:18:39,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-17 10:18:39,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:39,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-17 10:18:39,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-10-17 10:18:39,651 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-10-17 10:18:39,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 270 transitions, 2130 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:39,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:39,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-10-17 10:18:39,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:41,471 INFO L130 PetriNetUnfolder]: 361/1083 cut-off events. [2022-10-17 10:18:41,472 INFO L131 PetriNetUnfolder]: For 6551/6551 co-relation queries the response was YES. [2022-10-17 10:18:41,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4814 conditions, 1083 events. 361/1083 cut-off events. For 6551/6551 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7304 event pairs, 3 based on Foata normal form. 26/1108 useless extension candidates. Maximal degree in co-relation 4778. Up to 167 conditions per place. [2022-10-17 10:18:41,489 INFO L137 encePairwiseOnDemand]: 66/84 looper letters, 170 selfloop transitions, 270 changer transitions 79/560 dead transitions. [2022-10-17 10:18:41,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 560 transitions, 5808 flow [2022-10-17 10:18:41,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-10-17 10:18:41,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-10-17 10:18:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2524 transitions. [2022-10-17 10:18:41,496 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6532091097308489 [2022-10-17 10:18:41,496 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2524 transitions. [2022-10-17 10:18:41,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2524 transitions. [2022-10-17 10:18:41,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:41,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2524 transitions. [2022-10-17 10:18:41,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 54.869565217391305) internal successors, (2524), 46 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:41,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:41,555 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:41,555 INFO L175 Difference]: Start difference. First operand has 182 places, 270 transitions, 2130 flow. Second operand 46 states and 2524 transitions. [2022-10-17 10:18:41,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 560 transitions, 5808 flow [2022-10-17 10:18:41,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 560 transitions, 5385 flow, removed 113 selfloop flow, removed 9 redundant places. [2022-10-17 10:18:41,614 INFO L231 Difference]: Finished difference. Result has 243 places, 426 transitions, 4246 flow [2022-10-17 10:18:41,615 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=4246, PETRI_PLACES=243, PETRI_TRANSITIONS=426} [2022-10-17 10:18:41,616 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 169 predicate places. [2022-10-17 10:18:41,616 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 426 transitions, 4246 flow [2022-10-17 10:18:41,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:41,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:41,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:41,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:18:41,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-17 10:18:41,845 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:18:41,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:41,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1847654156, now seen corresponding path program 4 times [2022-10-17 10:18:41,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:41,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51658132] [2022-10-17 10:18:41,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:41,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:42,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:42,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51658132] [2022-10-17 10:18:42,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51658132] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:42,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:42,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-10-17 10:18:42,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768802976] [2022-10-17 10:18:42,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:42,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:18:42,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:42,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:18:42,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:18:42,064 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-10-17 10:18:42,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 426 transitions, 4246 flow. Second operand has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:42,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:42,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-10-17 10:18:42,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:42,663 INFO L130 PetriNetUnfolder]: 314/867 cut-off events. [2022-10-17 10:18:42,664 INFO L131 PetriNetUnfolder]: For 7977/7977 co-relation queries the response was YES. [2022-10-17 10:18:42,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4847 conditions, 867 events. 314/867 cut-off events. For 7977/7977 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4932 event pairs, 15 based on Foata normal form. 1/863 useless extension candidates. Maximal degree in co-relation 4784. Up to 279 conditions per place. [2022-10-17 10:18:42,684 INFO L137 encePairwiseOnDemand]: 69/84 looper letters, 175 selfloop transitions, 295 changer transitions 6/517 dead transitions. [2022-10-17 10:18:42,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 517 transitions, 6195 flow [2022-10-17 10:18:42,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-17 10:18:42,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-10-17 10:18:42,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1197 transitions. [2022-10-17 10:18:42,688 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2022-10-17 10:18:42,688 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1197 transitions. [2022-10-17 10:18:42,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1197 transitions. [2022-10-17 10:18:42,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:42,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1197 transitions. [2022-10-17 10:18:42,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 54.40909090909091) internal successors, (1197), 22 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:42,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:42,697 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:42,697 INFO L175 Difference]: Start difference. First operand has 243 places, 426 transitions, 4246 flow. Second operand 22 states and 1197 transitions. [2022-10-17 10:18:42,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 517 transitions, 6195 flow [2022-10-17 10:18:42,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 517 transitions, 5917 flow, removed 63 selfloop flow, removed 19 redundant places. [2022-10-17 10:18:42,856 INFO L231 Difference]: Finished difference. Result has 246 places, 500 transitions, 5637 flow [2022-10-17 10:18:42,857 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=4024, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5637, PETRI_PLACES=246, PETRI_TRANSITIONS=500} [2022-10-17 10:18:42,858 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 172 predicate places. [2022-10-17 10:18:42,858 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 500 transitions, 5637 flow [2022-10-17 10:18:42,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:42,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:42,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:42,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 10:18:42,860 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:18:42,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:42,860 INFO L85 PathProgramCache]: Analyzing trace with hash -62005542, now seen corresponding path program 5 times [2022-10-17 10:18:42,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:42,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38976445] [2022-10-17 10:18:42,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:42,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:43,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:43,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38976445] [2022-10-17 10:18:43,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38976445] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:18:43,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231028333] [2022-10-17 10:18:43,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-17 10:18:43,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:43,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:18:43,109 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:18:43,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:18:43,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-10-17 10:18:43,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:18:43,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 10:18:43,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:18:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:43,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:18:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:43,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231028333] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:18:43,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:18:43,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2022-10-17 10:18:43,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176455689] [2022-10-17 10:18:43,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:18:43,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-17 10:18:43,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:43,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-17 10:18:43,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-10-17 10:18:43,719 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-10-17 10:18:43,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 500 transitions, 5637 flow. Second operand has 20 states, 20 states have (on average 53.05) internal successors, (1061), 20 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) [2022-10-17 10:18:43,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:43,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-10-17 10:18:43,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:44,865 INFO L130 PetriNetUnfolder]: 567/1562 cut-off events. [2022-10-17 10:18:44,865 INFO L131 PetriNetUnfolder]: For 13413/13413 co-relation queries the response was YES. [2022-10-17 10:18:44,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9269 conditions, 1562 events. 567/1562 cut-off events. For 13413/13413 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10942 event pairs, 24 based on Foata normal form. 2/1556 useless extension candidates. Maximal degree in co-relation 9206. Up to 256 conditions per place. [2022-10-17 10:18:44,903 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 239 selfloop transitions, 614 changer transitions 38/932 dead transitions. [2022-10-17 10:18:44,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 932 transitions, 12681 flow [2022-10-17 10:18:44,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-17 10:18:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-10-17 10:18:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1756 transitions. [2022-10-17 10:18:44,908 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6532738095238095 [2022-10-17 10:18:44,908 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1756 transitions. [2022-10-17 10:18:44,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1756 transitions. [2022-10-17 10:18:44,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:44,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1756 transitions. [2022-10-17 10:18:44,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 54.875) internal successors, (1756), 32 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:44,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:44,922 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:44,922 INFO L175 Difference]: Start difference. First operand has 246 places, 500 transitions, 5637 flow. Second operand 32 states and 1756 transitions. [2022-10-17 10:18:44,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 932 transitions, 12681 flow [2022-10-17 10:18:45,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 932 transitions, 12327 flow, removed 76 selfloop flow, removed 4 redundant places. [2022-10-17 10:18:45,185 INFO L231 Difference]: Finished difference. Result has 278 places, 794 transitions, 10901 flow [2022-10-17 10:18:45,187 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5435, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10901, PETRI_PLACES=278, PETRI_TRANSITIONS=794} [2022-10-17 10:18:45,188 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 204 predicate places. [2022-10-17 10:18:45,189 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 794 transitions, 10901 flow [2022-10-17 10:18:45,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.05) internal successors, (1061), 20 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) [2022-10-17 10:18:45,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:45,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:45,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:18:45,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:45,405 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:18:45,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:45,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1991395312, now seen corresponding path program 6 times [2022-10-17 10:18:45,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:45,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606386613] [2022-10-17 10:18:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:45,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:45,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:45,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606386613] [2022-10-17 10:18:45,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606386613] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:18:45,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988524869] [2022-10-17 10:18:45,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-10-17 10:18:45,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:45,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:18:45,668 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:18:45,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:18:45,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-10-17 10:18:45,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:18:45,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-17 10:18:45,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:18:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:46,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:18:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:18:46,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988524869] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:18:46,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:18:46,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-10-17 10:18:46,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423176198] [2022-10-17 10:18:46,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:18:46,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-17 10:18:46,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:46,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-17 10:18:46,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-10-17 10:18:46,328 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-10-17 10:18:46,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 794 transitions, 10901 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:46,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:46,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-10-17 10:18:46,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:49,108 INFO L130 PetriNetUnfolder]: 982/2553 cut-off events. [2022-10-17 10:18:49,108 INFO L131 PetriNetUnfolder]: For 29186/29186 co-relation queries the response was YES. [2022-10-17 10:18:49,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17090 conditions, 2553 events. 982/2553 cut-off events. For 29186/29186 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19698 event pairs, 12 based on Foata normal form. 28/2578 useless extension candidates. Maximal degree in co-relation 17022. Up to 408 conditions per place. [2022-10-17 10:18:49,175 INFO L137 encePairwiseOnDemand]: 65/84 looper letters, 300 selfloop transitions, 1101 changer transitions 20/1462 dead transitions. [2022-10-17 10:18:49,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1462 transitions, 22972 flow [2022-10-17 10:18:49,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-10-17 10:18:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-10-17 10:18:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2711 transitions. [2022-10-17 10:18:49,182 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6586491739552964 [2022-10-17 10:18:49,182 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2711 transitions. [2022-10-17 10:18:49,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2711 transitions. [2022-10-17 10:18:49,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:49,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2711 transitions. [2022-10-17 10:18:49,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 55.326530612244895) internal successors, (2711), 49 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:49,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:49,200 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:49,201 INFO L175 Difference]: Start difference. First operand has 278 places, 794 transitions, 10901 flow. Second operand 49 states and 2711 transitions. [2022-10-17 10:18:49,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1462 transitions, 22972 flow [2022-10-17 10:18:49,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1462 transitions, 21639 flow, removed 94 selfloop flow, removed 14 redundant places. [2022-10-17 10:18:49,499 INFO L231 Difference]: Finished difference. Result has 321 places, 1303 transitions, 20930 flow [2022-10-17 10:18:49,500 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=10193, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=20930, PETRI_PLACES=321, PETRI_TRANSITIONS=1303} [2022-10-17 10:18:49,501 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 247 predicate places. [2022-10-17 10:18:49,501 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 1303 transitions, 20930 flow [2022-10-17 10:18:49,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:49,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:49,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:49,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-10-17 10:18:49,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:49,770 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:18:49,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:49,770 INFO L85 PathProgramCache]: Analyzing trace with hash -481463372, now seen corresponding path program 7 times [2022-10-17 10:18:49,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:49,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153786960] [2022-10-17 10:18:49,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:49,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:49,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:49,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153786960] [2022-10-17 10:18:49,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153786960] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:49,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:18:49,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-10-17 10:18:49,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131777624] [2022-10-17 10:18:49,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:49,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:18:49,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:49,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:18:49,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:18:49,965 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-10-17 10:18:49,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 1303 transitions, 20930 flow. Second operand has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:49,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:49,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-10-17 10:18:49,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:51,941 INFO L130 PetriNetUnfolder]: 1036/2636 cut-off events. [2022-10-17 10:18:51,941 INFO L131 PetriNetUnfolder]: For 38091/38091 co-relation queries the response was YES. [2022-10-17 10:18:51,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20033 conditions, 2636 events. 1036/2636 cut-off events. For 38091/38091 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 20225 event pairs, 37 based on Foata normal form. 1/2625 useless extension candidates. Maximal degree in co-relation 19949. Up to 1358 conditions per place. [2022-10-17 10:18:52,024 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 930 selfloop transitions, 461 changer transitions 6/1438 dead transitions. [2022-10-17 10:18:52,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1438 transitions, 25804 flow [2022-10-17 10:18:52,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 10:18:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-10-17 10:18:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 824 transitions. [2022-10-17 10:18:52,027 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2022-10-17 10:18:52,027 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 824 transitions. [2022-10-17 10:18:52,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 824 transitions. [2022-10-17 10:18:52,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:52,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 824 transitions. [2022-10-17 10:18:52,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 54.93333333333333) internal successors, (824), 15 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:52,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:52,033 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:52,033 INFO L175 Difference]: Start difference. First operand has 321 places, 1303 transitions, 20930 flow. Second operand 15 states and 824 transitions. [2022-10-17 10:18:52,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1438 transitions, 25804 flow [2022-10-17 10:18:52,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1438 transitions, 25588 flow, removed 82 selfloop flow, removed 10 redundant places. [2022-10-17 10:18:52,509 INFO L231 Difference]: Finished difference. Result has 332 places, 1402 transitions, 23575 flow [2022-10-17 10:18:52,511 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=20730, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=23575, PETRI_PLACES=332, PETRI_TRANSITIONS=1402} [2022-10-17 10:18:52,512 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 258 predicate places. [2022-10-17 10:18:52,512 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 1402 transitions, 23575 flow [2022-10-17 10:18:52,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:52,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:52,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:52,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-17 10:18:52,513 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:18:52,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:52,514 INFO L85 PathProgramCache]: Analyzing trace with hash 523897784, now seen corresponding path program 8 times [2022-10-17 10:18:52,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:52,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866386226] [2022-10-17 10:18:52,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:52,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:52,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:52,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866386226] [2022-10-17 10:18:52,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866386226] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:18:52,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635633141] [2022-10-17 10:18:52,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:18:52,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:52,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:18:52,780 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:18:52,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:18:52,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:18:52,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:18:52,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-17 10:18:52,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:18:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:53,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:18:53,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635633141] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:53,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:18:53,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-10-17 10:18:53,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335324899] [2022-10-17 10:18:53,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:53,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:18:53,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:53,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:18:53,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:18:53,151 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-10-17 10:18:53,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 1402 transitions, 23575 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:53,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:53,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-10-17 10:18:53,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:18:55,633 INFO L130 PetriNetUnfolder]: 1249/3227 cut-off events. [2022-10-17 10:18:55,633 INFO L131 PetriNetUnfolder]: For 54373/54373 co-relation queries the response was YES. [2022-10-17 10:18:55,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25382 conditions, 3227 events. 1249/3227 cut-off events. For 54373/54373 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 26172 event pairs, 50 based on Foata normal form. 1/3215 useless extension candidates. Maximal degree in co-relation 25291. Up to 2238 conditions per place. [2022-10-17 10:18:55,696 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 1458 selfloop transitions, 196 changer transitions 10/1705 dead transitions. [2022-10-17 10:18:55,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 1705 transitions, 32235 flow [2022-10-17 10:18:55,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-17 10:18:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-10-17 10:18:55,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 910 transitions. [2022-10-17 10:18:55,698 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2022-10-17 10:18:55,699 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 910 transitions. [2022-10-17 10:18:55,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 910 transitions. [2022-10-17 10:18:55,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:18:55,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 910 transitions. [2022-10-17 10:18:55,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.875) internal successors, (910), 16 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:55,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:55,704 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:55,704 INFO L175 Difference]: Start difference. First operand has 332 places, 1402 transitions, 23575 flow. Second operand 16 states and 910 transitions. [2022-10-17 10:18:55,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 1705 transitions, 32235 flow [2022-10-17 10:18:56,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1705 transitions, 32025 flow, removed 105 selfloop flow, removed 3 redundant places. [2022-10-17 10:18:56,439 INFO L231 Difference]: Finished difference. Result has 351 places, 1567 transitions, 27236 flow [2022-10-17 10:18:56,440 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=23493, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=27236, PETRI_PLACES=351, PETRI_TRANSITIONS=1567} [2022-10-17 10:18:56,441 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 277 predicate places. [2022-10-17 10:18:56,441 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1567 transitions, 27236 flow [2022-10-17 10:18:56,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:56,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:18:56,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:18:56,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-10-17 10:18:56,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-17 10:18:56,643 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:18:56,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:18:56,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1991456824, now seen corresponding path program 9 times [2022-10-17 10:18:56,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:18:56,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933434933] [2022-10-17 10:18:56,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:18:56,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:18:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:18:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:56,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:18:56,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933434933] [2022-10-17 10:18:56,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933434933] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:18:56,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482855780] [2022-10-17 10:18:56,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:18:56,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:18:56,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:18:56,926 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:18:56,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27a92b5f-4592-4067-896d-478f0e3bdd21/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:18:56,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-17 10:18:56,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:18:56,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-17 10:18:56,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:18:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:18:57,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:18:57,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482855780] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:18:57,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:18:57,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-10-17 10:18:57,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231892694] [2022-10-17 10:18:57,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:18:57,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:18:57,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:18:57,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:18:57,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:18:57,284 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-10-17 10:18:57,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1567 transitions, 27236 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:18:57,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:18:57,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-10-17 10:18:57,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand