./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/rewnif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/rewnif.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3 --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 bd3be5fb57a7e23155ad350d5bdf2d3f1bfe8270 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:15:24,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:15:24,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:15:24,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:15:24,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:15:24,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:15:24,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:15:24,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:15:24,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:15:24,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:15:24,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:15:24,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:15:24,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:15:24,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:15:24,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:15:24,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:15:24,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:15:24,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:15:24,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:15:24,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:15:24,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:15:24,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:15:24,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:15:24,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:15:24,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:15:24,234 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:15:24,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:15:24,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:15:24,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:15:24,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:15:24,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:15:24,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:15:24,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:15:24,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:15:24,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:15:24,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:15:24,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:15:24,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:15:24,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:15:24,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:15:24,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:15:24,251 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:15:24,292 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:15:24,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:15:24,293 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:15:24,294 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:15:24,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:15:24,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:15:24,302 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:15:24,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:15:24,303 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:15:24,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:15:24,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:15:24,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:15:24,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:15:24,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:15:24,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:15:24,306 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:15:24,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:15:24,306 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:15:24,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:15:24,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:15:24,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:15:24,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:15:24,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:15:24,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:15:24,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:15:24,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:15:24,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:15:24,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:15:24,310 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:15:24,310 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:15:24,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:15:24,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:15:24,311 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_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd3be5fb57a7e23155ad350d5bdf2d3f1bfe8270 [2021-10-15 20:15:24,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:15:24,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:15:24,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:15:24,664 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:15:24,665 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:15:24,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/array-tiling/rewnif.c [2021-10-15 20:15:24,745 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/data/a6e8dfd9b/3d5553ec12534be08feb78607b0106da/FLAGc7310be9b [2021-10-15 20:15:25,189 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:15:25,189 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/sv-benchmarks/c/array-tiling/rewnif.c [2021-10-15 20:15:25,194 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/data/a6e8dfd9b/3d5553ec12534be08feb78607b0106da/FLAGc7310be9b [2021-10-15 20:15:25,590 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/data/a6e8dfd9b/3d5553ec12534be08feb78607b0106da [2021-10-15 20:15:25,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:15:25,593 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:15:25,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:15:25,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:15:25,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:15:25,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:15:25" (1/1) ... [2021-10-15 20:15:25,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da98e4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:25, skipping insertion in model container [2021-10-15 20:15:25,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:15:25" (1/1) ... [2021-10-15 20:15:25,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:15:25,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:15:25,802 WARN L228 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_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/sv-benchmarks/c/array-tiling/rewnif.c[397,410] [2021-10-15 20:15:25,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:15:25,825 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:15:25,837 WARN L228 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_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/sv-benchmarks/c/array-tiling/rewnif.c[397,410] [2021-10-15 20:15:25,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:15:25,856 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:15:25,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:25 WrapperNode [2021-10-15 20:15:25,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:15:25,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:15:25,859 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:15:25,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:15:25,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:25" (1/1) ... [2021-10-15 20:15:25,873 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:25" (1/1) ... [2021-10-15 20:15:25,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:15:25,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:15:25,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:15:25,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:15:25,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:25" (1/1) ... [2021-10-15 20:15:25,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:25" (1/1) ... [2021-10-15 20:15:25,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:25" (1/1) ... [2021-10-15 20:15:25,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:25" (1/1) ... [2021-10-15 20:15:25,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:25" (1/1) ... [2021-10-15 20:15:25,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:25" (1/1) ... [2021-10-15 20:15:25,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:25" (1/1) ... [2021-10-15 20:15:25,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:15:25,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:15:25,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:15:25,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:15:25,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:25" (1/1) ... [2021-10-15 20:15:25,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:15:25,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:15:25,959 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:15:25,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:15:26,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:15:26,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:15:26,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 20:15:26,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 20:15:26,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:15:26,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:15:26,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 20:15:26,249 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:15:26,250 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-15 20:15:26,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:15:26 BoogieIcfgContainer [2021-10-15 20:15:26,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:15:26,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:15:26,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:15:26,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:15:26,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:15:25" (1/3) ... [2021-10-15 20:15:26,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a13de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:15:26, skipping insertion in model container [2021-10-15 20:15:26,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:15:25" (2/3) ... [2021-10-15 20:15:26,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a13de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:15:26, skipping insertion in model container [2021-10-15 20:15:26,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:15:26" (3/3) ... [2021-10-15 20:15:26,279 INFO L111 eAbstractionObserver]: Analyzing ICFG rewnif.c [2021-10-15 20:15:26,297 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:15:26,298 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:15:26,369 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:15:26,377 INFO L339 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, mConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 20:15:26,377 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:15:26,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 18 places, 24 transitions, 48 flow [2021-10-15 20:15:26,406 INFO L129 PetriNetUnfolder]: 7/24 cut-off events. [2021-10-15 20:15:26,406 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:15:26,408 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 24 events. 7/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 28 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 20:15:26,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 18 places, 24 transitions, 48 flow [2021-10-15 20:15:26,413 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 14 places, 18 transitions, 36 flow [2021-10-15 20:15:26,417 INFO L129 PetriNetUnfolder]: 5/17 cut-off events. [2021-10-15 20:15:26,418 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:15:26,418 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:26,419 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:26,419 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:26,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:26,425 INFO L82 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2021-10-15 20:15:26,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:26,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921074405] [2021-10-15 20:15:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:26,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:26,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:26,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921074405] [2021-10-15 20:15:26,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921074405] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:26,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:26,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:15:26,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60732439] [2021-10-15 20:15:26,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:15:26,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:26,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:15:26,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:15:26,617 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 24 [2021-10-15 20:15:26,620 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 18 transitions, 36 flow. Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:26,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:26,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 24 [2021-10-15 20:15:26,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:26,631 INFO L129 PetriNetUnfolder]: 3/16 cut-off events. [2021-10-15 20:15:26,631 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:15:26,632 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18 conditions, 16 events. 3/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 2/15 useless extension candidates. Maximal degree in co-relation 16. Up to 2 conditions per place. [2021-10-15 20:15:26,633 INFO L132 encePairwiseOnDemand]: 22/24 looper letters, 0 selfloop transitions, 0 changer transitions 0/16 dead transitions. [2021-10-15 20:15:26,634 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 16 transitions, 32 flow [2021-10-15 20:15:26,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:15:26,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:15:26,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 44 transitions. [2021-10-15 20:15:26,645 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2021-10-15 20:15:26,646 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 44 transitions. [2021-10-15 20:15:26,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 44 transitions. [2021-10-15 20:15:26,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:26,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 44 transitions. [2021-10-15 20:15:26,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:26,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:26,656 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:26,658 INFO L186 Difference]: Start difference. First operand has 14 places, 18 transitions, 36 flow. Second operand 2 states and 44 transitions. [2021-10-15 20:15:26,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 16 transitions, 32 flow [2021-10-15 20:15:26,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 16 transitions, 32 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:15:26,663 INFO L242 Difference]: Finished difference. Result has 15 places, 16 transitions, 32 flow [2021-10-15 20:15:26,665 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=32, PETRI_PLACES=15, PETRI_TRANSITIONS=16} [2021-10-15 20:15:26,666 INFO L334 CegarLoopForPetriNet]: 14 programPoint places, 1 predicate places. [2021-10-15 20:15:26,666 INFO L470 AbstractCegarLoop]: Abstraction has has 15 places, 16 transitions, 32 flow [2021-10-15 20:15:26,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:26,667 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:26,667 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:26,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:15:26,668 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:26,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:26,669 INFO L82 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2021-10-15 20:15:26,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:26,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396861495] [2021-10-15 20:15:26,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:26,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:26,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:26,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396861495] [2021-10-15 20:15:26,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396861495] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:26,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:26,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:15:26,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887894304] [2021-10-15 20:15:26,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:15:26,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:26,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:15:26,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:15:26,746 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2021-10-15 20:15:26,746 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 16 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:26,746 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:26,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2021-10-15 20:15:26,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:26,788 INFO L129 PetriNetUnfolder]: 3/20 cut-off events. [2021-10-15 20:15:26,788 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:15:26,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 20 events. 3/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 36. Up to 13 conditions per place. [2021-10-15 20:15:26,789 INFO L132 encePairwiseOnDemand]: 20/24 looper letters, 14 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2021-10-15 20:15:26,789 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 20 transitions, 72 flow [2021-10-15 20:15:26,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:15:26,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:15:26,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2021-10-15 20:15:26,791 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2021-10-15 20:15:26,791 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 39 transitions. [2021-10-15 20:15:26,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 39 transitions. [2021-10-15 20:15:26,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:26,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 39 transitions. [2021-10-15 20:15:26,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:26,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:26,794 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:26,794 INFO L186 Difference]: Start difference. First operand has 15 places, 16 transitions, 32 flow. Second operand 3 states and 39 transitions. [2021-10-15 20:15:26,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 20 transitions, 72 flow [2021-10-15 20:15:26,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 20 transitions, 72 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:15:26,797 INFO L242 Difference]: Finished difference. Result has 18 places, 17 transitions, 46 flow [2021-10-15 20:15:26,798 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=18, PETRI_TRANSITIONS=17} [2021-10-15 20:15:26,798 INFO L334 CegarLoopForPetriNet]: 14 programPoint places, 4 predicate places. [2021-10-15 20:15:26,799 INFO L470 AbstractCegarLoop]: Abstraction has has 18 places, 17 transitions, 46 flow [2021-10-15 20:15:26,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:26,799 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:26,799 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:26,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:15:26,800 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:26,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:26,801 INFO L82 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2021-10-15 20:15:26,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:26,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777540655] [2021-10-15 20:15:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:26,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:26,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:26,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777540655] [2021-10-15 20:15:26,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777540655] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:26,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456727995] [2021-10-15 20:15:26,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:26,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:26,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:15:26,952 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:15:26,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:15:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:27,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 20:15:27,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:15:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:27,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456727995] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:27,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:15:27,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-15 20:15:27,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768357303] [2021-10-15 20:15:27,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:15:27,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:27,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:15:27,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:15:27,245 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2021-10-15 20:15:27,246 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 17 transitions, 46 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:27,246 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:27,246 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2021-10-15 20:15:27,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:27,314 INFO L129 PetriNetUnfolder]: 4/25 cut-off events. [2021-10-15 20:15:27,314 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 20:15:27,314 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 25 events. 4/25 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 1/25 useless extension candidates. Maximal degree in co-relation 54. Up to 8 conditions per place. [2021-10-15 20:15:27,315 INFO L132 encePairwiseOnDemand]: 18/24 looper letters, 14 selfloop transitions, 7 changer transitions 0/25 dead transitions. [2021-10-15 20:15:27,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 108 flow [2021-10-15 20:15:27,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:15:27,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:15:27,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2021-10-15 20:15:27,320 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.475 [2021-10-15 20:15:27,320 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 57 transitions. [2021-10-15 20:15:27,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 57 transitions. [2021-10-15 20:15:27,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:27,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 57 transitions. [2021-10-15 20:15:27,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:27,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:27,326 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:27,326 INFO L186 Difference]: Start difference. First operand has 18 places, 17 transitions, 46 flow. Second operand 5 states and 57 transitions. [2021-10-15 20:15:27,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 108 flow [2021-10-15 20:15:27,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 25 transitions, 106 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:15:27,333 INFO L242 Difference]: Finished difference. Result has 23 places, 19 transitions, 76 flow [2021-10-15 20:15:27,334 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=76, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2021-10-15 20:15:27,336 INFO L334 CegarLoopForPetriNet]: 14 programPoint places, 9 predicate places. [2021-10-15 20:15:27,336 INFO L470 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 76 flow [2021-10-15 20:15:27,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:27,337 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:27,337 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:27,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:15:27,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:27,564 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:27,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:27,565 INFO L82 PathProgramCache]: Analyzing trace with hash -211811063, now seen corresponding path program 2 times [2021-10-15 20:15:27,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:27,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180528571] [2021-10-15 20:15:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:27,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 20:15:27,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:27,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180528571] [2021-10-15 20:15:27,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180528571] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:15:27,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:15:27,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:15:27,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571042644] [2021-10-15 20:15:27,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:15:27,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:27,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:15:27,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:15:27,653 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2021-10-15 20:15:27,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:27,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:27,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2021-10-15 20:15:27,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:27,710 INFO L129 PetriNetUnfolder]: 4/30 cut-off events. [2021-10-15 20:15:27,710 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2021-10-15 20:15:27,711 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 30 events. 4/30 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 25 event pairs, 0 based on Foata normal form. 1/30 useless extension candidates. Maximal degree in co-relation 84. Up to 11 conditions per place. [2021-10-15 20:15:27,711 INFO L132 encePairwiseOnDemand]: 17/24 looper letters, 11 selfloop transitions, 10 changer transitions 0/25 dead transitions. [2021-10-15 20:15:27,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 25 transitions, 146 flow [2021-10-15 20:15:27,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:15:27,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:15:27,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2021-10-15 20:15:27,713 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2021-10-15 20:15:27,713 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 46 transitions. [2021-10-15 20:15:27,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 46 transitions. [2021-10-15 20:15:27,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:27,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 46 transitions. [2021-10-15 20:15:27,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:27,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:27,715 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:27,715 INFO L186 Difference]: Start difference. First operand has 23 places, 19 transitions, 76 flow. Second operand 4 states and 46 transitions. [2021-10-15 20:15:27,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 25 transitions, 146 flow [2021-10-15 20:15:27,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 25 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:15:27,718 INFO L242 Difference]: Finished difference. Result has 27 places, 23 transitions, 137 flow [2021-10-15 20:15:27,718 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2021-10-15 20:15:27,719 INFO L334 CegarLoopForPetriNet]: 14 programPoint places, 13 predicate places. [2021-10-15 20:15:27,719 INFO L470 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 137 flow [2021-10-15 20:15:27,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:27,719 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:27,719 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:27,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:15:27,720 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:27,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:27,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2021-10-15 20:15:27,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:27,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710764207] [2021-10-15 20:15:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:27,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:27,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:27,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710764207] [2021-10-15 20:15:27,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710764207] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:27,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271901428] [2021-10-15 20:15:27,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:27,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:27,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:15:27,908 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:15:27,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:15:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:27,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 20:15:27,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:15:28,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-15 20:15:28,161 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 20:15:28,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-15 20:15:28,407 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-15 20:15:28,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-10-15 20:15:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:28,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271901428] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:28,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:15:28,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-10-15 20:15:28,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028252625] [2021-10-15 20:15:28,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 20:15:28,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:28,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:15:28,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:15:28,455 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2021-10-15 20:15:28,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 137 flow. Second operand has 11 states, 11 states have (on average 8.181818181818182) internal successors, (90), 11 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:28,456 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:28,456 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2021-10-15 20:15:28,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:28,662 INFO L129 PetriNetUnfolder]: 4/35 cut-off events. [2021-10-15 20:15:28,663 INFO L130 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2021-10-15 20:15:28,663 INFO L84 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 35 events. 4/35 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 26 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 127. Up to 15 conditions per place. [2021-10-15 20:15:28,665 INFO L132 encePairwiseOnDemand]: 15/24 looper letters, 19 selfloop transitions, 11 changer transitions 0/32 dead transitions. [2021-10-15 20:15:28,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 243 flow [2021-10-15 20:15:28,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 20:15:28,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 20:15:28,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 87 transitions. [2021-10-15 20:15:28,671 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3625 [2021-10-15 20:15:28,671 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 87 transitions. [2021-10-15 20:15:28,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 87 transitions. [2021-10-15 20:15:28,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:28,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 87 transitions. [2021-10-15 20:15:28,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:28,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:28,677 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:28,677 INFO L186 Difference]: Start difference. First operand has 27 places, 23 transitions, 137 flow. Second operand 10 states and 87 transitions. [2021-10-15 20:15:28,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 243 flow [2021-10-15 20:15:28,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 243 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:15:28,685 INFO L242 Difference]: Finished difference. Result has 38 places, 30 transitions, 215 flow [2021-10-15 20:15:28,685 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=215, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2021-10-15 20:15:28,685 INFO L334 CegarLoopForPetriNet]: 14 programPoint places, 24 predicate places. [2021-10-15 20:15:28,686 INFO L470 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 215 flow [2021-10-15 20:15:28,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.181818181818182) internal successors, (90), 11 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:28,686 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:28,686 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:28,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:15:28,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:28,908 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:28,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:28,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2021-10-15 20:15:28,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:28,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498052912] [2021-10-15 20:15:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:28,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:29,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:29,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498052912] [2021-10-15 20:15:29,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498052912] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:29,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858889639] [2021-10-15 20:15:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:29,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:29,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:15:29,128 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:15:29,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:15:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:29,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 20:15:29,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:15:29,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-15 20:15:29,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2021-10-15 20:15:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:29,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858889639] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:29,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:15:29,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-10-15 20:15:29,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305005036] [2021-10-15 20:15:29,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 20:15:29,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:29,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 20:15:29,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:15:29,457 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2021-10-15 20:15:29,457 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 215 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:29,457 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:29,457 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2021-10-15 20:15:29,457 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:29,651 INFO L129 PetriNetUnfolder]: 6/63 cut-off events. [2021-10-15 20:15:29,651 INFO L130 PetriNetUnfolder]: For 171/171 co-relation queries the response was YES. [2021-10-15 20:15:29,652 INFO L84 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 63 events. 6/63 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 1/64 useless extension candidates. Maximal degree in co-relation 267. Up to 16 conditions per place. [2021-10-15 20:15:29,653 INFO L132 encePairwiseOnDemand]: 15/24 looper letters, 31 selfloop transitions, 22 changer transitions 0/55 dead transitions. [2021-10-15 20:15:29,653 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 55 transitions, 510 flow [2021-10-15 20:15:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 20:15:29,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-15 20:15:29,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 139 transitions. [2021-10-15 20:15:29,656 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3861111111111111 [2021-10-15 20:15:29,656 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 139 transitions. [2021-10-15 20:15:29,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 139 transitions. [2021-10-15 20:15:29,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:29,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 139 transitions. [2021-10-15 20:15:29,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 9.266666666666667) internal successors, (139), 15 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:29,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 24.0) internal successors, (384), 16 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:29,659 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 24.0) internal successors, (384), 16 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:29,660 INFO L186 Difference]: Start difference. First operand has 38 places, 30 transitions, 215 flow. Second operand 15 states and 139 transitions. [2021-10-15 20:15:29,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 55 transitions, 510 flow [2021-10-15 20:15:29,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 507 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:15:29,666 INFO L242 Difference]: Finished difference. Result has 54 places, 43 transitions, 392 flow [2021-10-15 20:15:29,666 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=392, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2021-10-15 20:15:29,666 INFO L334 CegarLoopForPetriNet]: 14 programPoint places, 40 predicate places. [2021-10-15 20:15:29,667 INFO L470 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 392 flow [2021-10-15 20:15:29,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:29,667 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:29,667 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:29,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:15:29,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-15 20:15:29,873 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:29,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:29,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 2 times [2021-10-15 20:15:29,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:29,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822169866] [2021-10-15 20:15:29,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:29,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:29,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:29,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822169866] [2021-10-15 20:15:29,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822169866] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:29,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559523226] [2021-10-15 20:15:29,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:15:29,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:29,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:15:29,979 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:15:29,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:15:30,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:15:30,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:15:30,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 20:15:30,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:15:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:30,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559523226] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:30,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:15:30,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-10-15 20:15:30,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428872365] [2021-10-15 20:15:30,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 20:15:30,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:30,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 20:15:30,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-15 20:15:30,212 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2021-10-15 20:15:30,212 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 392 flow. Second operand has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 12 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:30,212 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:30,212 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2021-10-15 20:15:30,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:30,342 INFO L129 PetriNetUnfolder]: 3/71 cut-off events. [2021-10-15 20:15:30,343 INFO L130 PetriNetUnfolder]: For 319/319 co-relation queries the response was YES. [2021-10-15 20:15:30,343 INFO L84 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 71 events. 3/71 cut-off events. For 319/319 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 104 event pairs, 0 based on Foata normal form. 4/75 useless extension candidates. Maximal degree in co-relation 338. Up to 19 conditions per place. [2021-10-15 20:15:30,344 INFO L132 encePairwiseOnDemand]: 15/24 looper letters, 20 selfloop transitions, 13 changer transitions 9/51 dead transitions. [2021-10-15 20:15:30,344 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 51 transitions, 554 flow [2021-10-15 20:15:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:15:30,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 20:15:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 122 transitions. [2021-10-15 20:15:30,346 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4236111111111111 [2021-10-15 20:15:30,346 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 122 transitions. [2021-10-15 20:15:30,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 122 transitions. [2021-10-15 20:15:30,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:30,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 122 transitions. [2021-10-15 20:15:30,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 10.166666666666666) internal successors, (122), 12 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:30,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:30,348 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:30,349 INFO L186 Difference]: Start difference. First operand has 54 places, 43 transitions, 392 flow. Second operand 12 states and 122 transitions. [2021-10-15 20:15:30,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 51 transitions, 554 flow [2021-10-15 20:15:30,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 51 transitions, 507 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-10-15 20:15:30,356 INFO L242 Difference]: Finished difference. Result has 62 places, 41 transitions, 361 flow [2021-10-15 20:15:30,356 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=361, PETRI_PLACES=62, PETRI_TRANSITIONS=41} [2021-10-15 20:15:30,356 INFO L334 CegarLoopForPetriNet]: 14 programPoint places, 48 predicate places. [2021-10-15 20:15:30,356 INFO L470 AbstractCegarLoop]: Abstraction has has 62 places, 41 transitions, 361 flow [2021-10-15 20:15:30,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 12 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:30,357 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:30,357 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:30,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:15:30,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 20:15:30,584 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:30,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:30,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1364521933, now seen corresponding path program 3 times [2021-10-15 20:15:30,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:30,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054037047] [2021-10-15 20:15:30,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:30,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:31,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:31,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054037047] [2021-10-15 20:15:31,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054037047] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:31,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823428809] [2021-10-15 20:15:31,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:15:31,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:31,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:15:31,156 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:15:31,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:15:31,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-15 20:15:31,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:15:31,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 20:15:31,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:15:31,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-15 20:15:31,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:15:31,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-10-15 20:15:31,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:15:31,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:15:31,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:15:31,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 20:15:31,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-10-15 20:15:31,819 INFO L354 Elim1Store]: treesize reduction 141, result has 23.4 percent of original size [2021-10-15 20:15:31,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 71 [2021-10-15 20:15:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 20:15:32,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823428809] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:32,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:15:32,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-10-15 20:15:32,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155138696] [2021-10-15 20:15:32,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-15 20:15:32,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:32,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-15 20:15:32,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-10-15 20:15:32,356 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2021-10-15 20:15:32,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 41 transitions, 361 flow. Second operand has 19 states, 19 states have (on average 7.2105263157894735) internal successors, (137), 19 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:32,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:32,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2021-10-15 20:15:32,357 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:41,583 INFO L129 PetriNetUnfolder]: 3/47 cut-off events. [2021-10-15 20:15:41,583 INFO L130 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2021-10-15 20:15:41,583 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 47 events. 3/47 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 1/48 useless extension candidates. Maximal degree in co-relation 228. Up to 13 conditions per place. [2021-10-15 20:15:41,584 INFO L132 encePairwiseOnDemand]: 15/24 looper letters, 11 selfloop transitions, 17 changer transitions 15/45 dead transitions. [2021-10-15 20:15:41,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 45 transitions, 450 flow [2021-10-15 20:15:41,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-15 20:15:41,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-15 20:15:41,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 158 transitions. [2021-10-15 20:15:41,586 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.286231884057971 [2021-10-15 20:15:41,586 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 158 transitions. [2021-10-15 20:15:41,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 158 transitions. [2021-10-15 20:15:41,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:41,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 158 transitions. [2021-10-15 20:15:41,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 6.869565217391305) internal successors, (158), 23 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) [2021-10-15 20:15:41,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 24.0) internal successors, (576), 24 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:41,590 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 24.0) internal successors, (576), 24 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:41,590 INFO L186 Difference]: Start difference. First operand has 62 places, 41 transitions, 361 flow. Second operand 23 states and 158 transitions. [2021-10-15 20:15:41,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 45 transitions, 450 flow [2021-10-15 20:15:41,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 45 transitions, 423 flow, removed 4 selfloop flow, removed 9 redundant places. [2021-10-15 20:15:41,595 INFO L242 Difference]: Finished difference. Result has 70 places, 30 transitions, 264 flow [2021-10-15 20:15:41,595 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=264, PETRI_PLACES=70, PETRI_TRANSITIONS=30} [2021-10-15 20:15:41,596 INFO L334 CegarLoopForPetriNet]: 14 programPoint places, 56 predicate places. [2021-10-15 20:15:41,596 INFO L470 AbstractCegarLoop]: Abstraction has has 70 places, 30 transitions, 264 flow [2021-10-15 20:15:41,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.2105263157894735) internal successors, (137), 19 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:41,596 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:41,596 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:41,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:15:41,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:41,824 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:41,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:41,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 4 times [2021-10-15 20:15:41,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:41,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507710517] [2021-10-15 20:15:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:41,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:42,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:42,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507710517] [2021-10-15 20:15:42,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507710517] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:42,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475225257] [2021-10-15 20:15:42,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 20:15:42,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:42,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:15:42,040 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:15:42,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 20:15:42,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 20:15:42,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:15:42,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 20:15:42,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:15:42,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 20:15:42,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-10-15 20:15:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:42,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475225257] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:42,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:15:42,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-10-15 20:15:42,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302955805] [2021-10-15 20:15:42,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 20:15:42,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:42,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 20:15:42,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-10-15 20:15:42,394 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 24 [2021-10-15 20:15:42,394 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 30 transitions, 264 flow. Second operand has 13 states, 13 states have (on average 8.538461538461538) internal successors, (111), 13 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:42,394 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:42,394 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 24 [2021-10-15 20:15:42,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:42,588 INFO L129 PetriNetUnfolder]: 1/36 cut-off events. [2021-10-15 20:15:42,588 INFO L130 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2021-10-15 20:15:42,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 36 events. 1/36 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 1/37 useless extension candidates. Maximal degree in co-relation 186. Up to 9 conditions per place. [2021-10-15 20:15:42,589 INFO L132 encePairwiseOnDemand]: 16/24 looper letters, 15 selfloop transitions, 16 changer transitions 0/33 dead transitions. [2021-10-15 20:15:42,589 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 33 transitions, 364 flow [2021-10-15 20:15:42,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 20:15:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-15 20:15:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 122 transitions. [2021-10-15 20:15:42,590 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3388888888888889 [2021-10-15 20:15:42,590 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 122 transitions. [2021-10-15 20:15:42,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 122 transitions. [2021-10-15 20:15:42,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:42,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 122 transitions. [2021-10-15 20:15:42,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:42,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 24.0) internal successors, (384), 16 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:42,592 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 24.0) internal successors, (384), 16 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:42,593 INFO L186 Difference]: Start difference. First operand has 70 places, 30 transitions, 264 flow. Second operand 15 states and 122 transitions. [2021-10-15 20:15:42,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 33 transitions, 364 flow [2021-10-15 20:15:42,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 33 transitions, 275 flow, removed 8 selfloop flow, removed 19 redundant places. [2021-10-15 20:15:42,596 INFO L242 Difference]: Finished difference. Result has 59 places, 33 transitions, 258 flow [2021-10-15 20:15:42,597 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=258, PETRI_PLACES=59, PETRI_TRANSITIONS=33} [2021-10-15 20:15:42,597 INFO L334 CegarLoopForPetriNet]: 14 programPoint places, 45 predicate places. [2021-10-15 20:15:42,597 INFO L470 AbstractCegarLoop]: Abstraction has has 59 places, 33 transitions, 258 flow [2021-10-15 20:15:42,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.538461538461538) internal successors, (111), 13 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:42,597 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:15:42,597 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:15:42,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:15:42,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:42,801 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:15:42,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:15:42,802 INFO L82 PathProgramCache]: Analyzing trace with hash 948898404, now seen corresponding path program 5 times [2021-10-15 20:15:42,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:15:42,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520774750] [2021-10-15 20:15:42,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:15:42,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:15:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:15:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:42,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:15:42,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520774750] [2021-10-15 20:15:42,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520774750] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:42,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965482323] [2021-10-15 20:15:42,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 20:15:42,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:15:42,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:15:42,889 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:15:42,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 20:15:43,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-15 20:15:43,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:15:43,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 20:15:43,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:15:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:15:43,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965482323] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:15:43,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:15:43,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-10-15 20:15:43,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733339022] [2021-10-15 20:15:43,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:15:43,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:15:43,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:15:43,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:15:43,261 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 24 [2021-10-15 20:15:43,261 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 33 transitions, 258 flow. Second operand has 15 states, 15 states have (on average 9.466666666666667) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:43,261 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:15:43,261 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 24 [2021-10-15 20:15:43,261 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:15:43,376 INFO L129 PetriNetUnfolder]: 0/29 cut-off events. [2021-10-15 20:15:43,376 INFO L130 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2021-10-15 20:15:43,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 29 events. 0/29 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/30 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2021-10-15 20:15:43,377 INFO L132 encePairwiseOnDemand]: 16/24 looper letters, 0 selfloop transitions, 0 changer transitions 27/27 dead transitions. [2021-10-15 20:15:43,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 27 transitions, 249 flow [2021-10-15 20:15:43,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:15:43,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 20:15:43,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 108 transitions. [2021-10-15 20:15:43,378 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.375 [2021-10-15 20:15:43,378 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 108 transitions. [2021-10-15 20:15:43,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 108 transitions. [2021-10-15 20:15:43,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:15:43,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 108 transitions. [2021-10-15 20:15:43,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 9.0) internal successors, (108), 12 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:43,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:43,380 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 24.0) internal successors, (312), 13 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:43,380 INFO L186 Difference]: Start difference. First operand has 59 places, 33 transitions, 258 flow. Second operand 12 states and 108 transitions. [2021-10-15 20:15:43,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 27 transitions, 249 flow [2021-10-15 20:15:43,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 27 transitions, 209 flow, removed 3 selfloop flow, removed 15 redundant places. [2021-10-15 20:15:43,383 INFO L242 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2021-10-15 20:15:43,383 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2021-10-15 20:15:43,383 INFO L334 CegarLoopForPetriNet]: 14 programPoint places, 38 predicate places. [2021-10-15 20:15:43,383 INFO L470 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2021-10-15 20:15:43,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.466666666666667) internal successors, (142), 15 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:15:43,386 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:15:43,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 20:15:43,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 20:15:43,604 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:15:43,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:15:43 BoogieIcfgContainer [2021-10-15 20:15:43,607 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:15:43,607 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:15:43,607 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:15:43,607 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:15:43,608 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:15:26" (3/4) ... [2021-10-15 20:15:43,610 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:15:43,621 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 20:15:43,621 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:15:43,621 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:15:43,621 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:15:43,647 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:15:43,647 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:15:43,648 INFO L168 Benchmark]: Toolchain (without parser) took 18054.70 ms. Allocated memory was 142.6 MB in the beginning and 178.3 MB in the end (delta: 35.7 MB). Free memory was 107.1 MB in the beginning and 61.2 MB in the end (delta: 45.9 MB). Peak memory consumption was 82.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:43,649 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 83.9 MB. Free memory was 54.8 MB in the beginning and 54.8 MB in the end (delta: 26.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:15:43,649 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.63 ms. Allocated memory is still 142.6 MB. Free memory was 107.1 MB in the beginning and 117.3 MB in the end (delta: -10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:43,650 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.30 ms. Allocated memory is still 142.6 MB. Free memory was 117.3 MB in the beginning and 116.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:15:43,650 INFO L168 Benchmark]: Boogie Preprocessor took 23.79 ms. Allocated memory is still 142.6 MB. Free memory was 116.1 MB in the beginning and 114.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:43,650 INFO L168 Benchmark]: RCFGBuilder took 335.22 ms. Allocated memory is still 142.6 MB. Free memory was 114.8 MB in the beginning and 104.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:43,651 INFO L168 Benchmark]: TraceAbstraction took 17334.89 ms. Allocated memory was 142.6 MB in the beginning and 178.3 MB in the end (delta: 35.7 MB). Free memory was 103.9 MB in the beginning and 63.3 MB in the end (delta: 40.7 MB). Peak memory consumption was 78.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:43,651 INFO L168 Benchmark]: Witness Printer took 40.32 ms. Allocated memory is still 178.3 MB. Free memory was 63.3 MB in the beginning and 61.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:15:43,654 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 83.9 MB. Free memory was 54.8 MB in the beginning and 54.8 MB in the end (delta: 26.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 262.63 ms. Allocated memory is still 142.6 MB. Free memory was 107.1 MB in the beginning and 117.3 MB in the end (delta: -10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.30 ms. Allocated memory is still 142.6 MB. Free memory was 117.3 MB in the beginning and 116.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.79 ms. Allocated memory is still 142.6 MB. Free memory was 116.1 MB in the beginning and 114.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 335.22 ms. Allocated memory is still 142.6 MB. Free memory was 114.8 MB in the beginning and 104.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17334.89 ms. Allocated memory was 142.6 MB in the beginning and 178.3 MB in the end (delta: 35.7 MB). Free memory was 103.9 MB in the beginning and 63.3 MB in the end (delta: 40.7 MB). Peak memory consumption was 78.6 MB. Max. memory is 16.1 GB. * Witness Printer took 40.32 ms. Allocated memory is still 178.3 MB. Free memory was 63.3 MB in the beginning and 61.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 17239.1ms, OverallIterations: 10, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 10423.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 36.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 59 SDtfs, 159 SDslu, 102 SDs, 0 SdLazy, 923 SolverSat, 157 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 757.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 145 SyntacticMatches, 8 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 9901.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=392occurred in iteration=6, InterpolantAutomatonStates: 101, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 84.5ms SsaConstructionTime, 432.4ms SatisfiabilityAnalysisTime, 3930.2ms InterpolantComputationTime, 352 NumberOfCodeBlocks, 350 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 335 ConstructedInterpolants, 10 QuantifiedInterpolants, 2621 SizeOfPredicates, 30 NumberOfNonLiveVariables, 606 ConjunctsInSsa, 83 ConjunctsInUnsatCore, 17 InterpolantComputations, 3 PerfectInterpolantSequences, 49/236 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:15:43,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baf06d01-b5a1-4a8d-b5d2-4181a03757e5/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...