./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem16_label50.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_4e9492f7-2b14-41df-9d4f-d60cf0964437/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9492f7-2b14-41df-9d4f-d60cf0964437/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_4e9492f7-2b14-41df-9d4f-d60cf0964437/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9492f7-2b14-41df-9d4f-d60cf0964437/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem16_label50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9492f7-2b14-41df-9d4f-d60cf0964437/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_4e9492f7-2b14-41df-9d4f-d60cf0964437/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 70b3f0d2d990d268eee63e151ee95e4150e229e8 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 19:22:34,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:22:34,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:22:34,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:22:34,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:22:34,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:22:34,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:22:34,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:22:34,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:22:34,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:22:34,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:22:34,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:22:34,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:22:34,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:22:34,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:22:34,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:22:34,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:22:34,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:22:34,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:22:34,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:22:34,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:22:34,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:22:34,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:22:34,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:22:34,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:22:34,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:22:34,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:22:34,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:22:34,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:22:34,299 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:22:34,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:22:34,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:22:34,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:22:34,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:22:34,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:22:34,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:22:34,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:22:34,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:22:34,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:22:34,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:22:34,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:22:34,313 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9492f7-2b14-41df-9d4f-d60cf0964437/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:22:34,367 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:22:34,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:22:34,368 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:22:34,368 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:22:34,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:22:34,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:22:34,378 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:22:34,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:22:34,379 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:22:34,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:22:34,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:22:34,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:22:34,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:22:34,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:22:34,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:22:34,382 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:22:34,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:22:34,382 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:22:34,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:22:34,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:22:34,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:22:34,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:22:34,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:22:34,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:22:34,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:22:34,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:22:34,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:22:34,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:22:34,386 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:22:34,388 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:22:34,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:22:34,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:22:34,389 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_4e9492f7-2b14-41df-9d4f-d60cf0964437/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9492f7-2b14-41df-9d4f-d60cf0964437/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 70b3f0d2d990d268eee63e151ee95e4150e229e8 [2021-10-15 19:22:34,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:22:34,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:22:34,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:22:34,773 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:22:34,774 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:22:34,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9492f7-2b14-41df-9d4f-d60cf0964437/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem16_label50.c [2021-10-15 19:22:34,868 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9492f7-2b14-41df-9d4f-d60cf0964437/bin/uautomizer-hJ6jxDFKc3/data/0f57481aa/b22aa524257442b8bcf50bd87712b050/FLAGb3e1da467 [2021-10-15 19:22:35,754 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:22:35,755 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9492f7-2b14-41df-9d4f-d60cf0964437/sv-benchmarks/c/eca-rers2012/Problem16_label50.c [2021-10-15 19:22:35,793 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9492f7-2b14-41df-9d4f-d60cf0964437/bin/uautomizer-hJ6jxDFKc3/data/0f57481aa/b22aa524257442b8bcf50bd87712b050/FLAGb3e1da467 [2021-10-15 19:22:35,838 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9492f7-2b14-41df-9d4f-d60cf0964437/bin/uautomizer-hJ6jxDFKc3/data/0f57481aa/b22aa524257442b8bcf50bd87712b050 [2021-10-15 19:22:35,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:22:35,846 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:22:35,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:22:35,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:22:35,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:22:35,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:22:35" (1/1) ... [2021-10-15 19:22:35,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b54a388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:35, skipping insertion in model container [2021-10-15 19:22:35,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:22:35" (1/1) ... [2021-10-15 19:22:35,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:22:35,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:22:36,215 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_4e9492f7-2b14-41df-9d4f-d60cf0964437/sv-benchmarks/c/eca-rers2012/Problem16_label50.c[4800,4813] [2021-10-15 19:22:36,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:22:36,787 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:22:36,823 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_4e9492f7-2b14-41df-9d4f-d60cf0964437/sv-benchmarks/c/eca-rers2012/Problem16_label50.c[4800,4813] [2021-10-15 19:22:37,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:22:37,053 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:22:37,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:37 WrapperNode [2021-10-15 19:22:37,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:22:37,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:22:37,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:22:37,057 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:22:37,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:37" (1/1) ... [2021-10-15 19:22:37,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:37" (1/1) ... [2021-10-15 19:22:37,256 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:22:37,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:22:37,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:22:37,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:22:37,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:37" (1/1) ... [2021-10-15 19:22:37,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:37" (1/1) ... [2021-10-15 19:22:37,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:37" (1/1) ... [2021-10-15 19:22:37,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:37" (1/1) ... [2021-10-15 19:22:37,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:37" (1/1) ... [2021-10-15 19:22:37,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:37" (1/1) ... [2021-10-15 19:22:37,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:37" (1/1) ... [2021-10-15 19:22:37,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:22:37,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:22:37,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:22:37,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:22:37,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:37" (1/1) ... [2021-10-15 19:22:37,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:22:37,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9492f7-2b14-41df-9d4f-d60cf0964437/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:22:37,539 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9492f7-2b14-41df-9d4f-d60cf0964437/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:22:37,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9492f7-2b14-41df-9d4f-d60cf0964437/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:22:37,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:22:37,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:22:37,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:22:37,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:22:40,197 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:22:40,197 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-15 19:22:40,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:22:40 BoogieIcfgContainer [2021-10-15 19:22:40,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:22:40,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:22:40,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:22:40,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:22:40,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:22:35" (1/3) ... [2021-10-15 19:22:40,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f0b8276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:22:40, skipping insertion in model container [2021-10-15 19:22:40,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:22:37" (2/3) ... [2021-10-15 19:22:40,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f0b8276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:22:40, skipping insertion in model container [2021-10-15 19:22:40,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:22:40" (3/3) ... [2021-10-15 19:22:40,216 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label50.c [2021-10-15 19:22:40,223 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:22:40,223 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:22:40,275 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:22:40,282 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 19:22:40,282 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:22:40,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 396 places, 723 transitions, 1446 flow [2021-10-15 19:22:40,515 INFO L129 PetriNetUnfolder]: 328/723 cut-off events. [2021-10-15 19:22:40,515 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:22:40,518 INFO L84 FinitePrefix]: Finished finitePrefix Result has 724 conditions, 723 events. 328/723 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 403 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 0. Up to 221 conditions per place. [2021-10-15 19:22:40,519 INFO L82 GeneralOperation]: Start removeDead. Operand has 396 places, 723 transitions, 1446 flow [2021-10-15 19:22:40,555 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 393 places, 718 transitions, 1436 flow [2021-10-15 19:22:40,568 INFO L129 PetriNetUnfolder]: 41/127 cut-off events. [2021-10-15 19:22:40,568 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:22:40,568 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:40,569 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:40,569 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:22:40,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:40,576 INFO L82 PathProgramCache]: Analyzing trace with hash -2068820151, now seen corresponding path program 1 times [2021-10-15 19:22:40,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:40,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63772189] [2021-10-15 19:22:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:40,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:40,958 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 19:22:40,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:40,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63772189] [2021-10-15 19:22:40,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63772189] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:40,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:40,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:22:40,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636620613] [2021-10-15 19:22:40,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:22:40,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:40,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:22:40,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:22:41,003 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:22:41,006 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 718 transitions, 1436 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 19:22:41,006 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:41,006 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:22:41,007 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:43,501 INFO L129 PetriNetUnfolder]: 386/1107 cut-off events. [2021-10-15 19:22:43,501 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:22:43,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2206 conditions, 1107 events. 386/1107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1156 event pairs, 0 based on Foata normal form. 61/722 useless extension candidates. Maximal degree in co-relation 1. Up to 700 conditions per place. [2021-10-15 19:22:43,513 INFO L132 encePairwiseOnDemand]: 336/723 looper letters, 903 selfloop transitions, 133 changer transitions 61/1103 dead transitions. [2021-10-15 19:22:43,514 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1103 transitions, 4400 flow [2021-10-15 19:22:43,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:22:43,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:22:43,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1389 transitions. [2021-10-15 19:22:43,544 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.640387275242047 [2021-10-15 19:22:43,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1389 transitions. [2021-10-15 19:22:43,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1389 transitions. [2021-10-15 19:22:43,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:43,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1389 transitions. [2021-10-15 19:22:43,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 463.0) internal successors, (1389), 3 states have internal predecessors, (1389), 0 states have call successors, (0), 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 19:22:43,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:22:43,587 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:22:43,589 INFO L186 Difference]: Start difference. First operand has 393 places, 718 transitions, 1436 flow. Second operand 3 states and 1389 transitions. [2021-10-15 19:22:43,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1103 transitions, 4400 flow [2021-10-15 19:22:43,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 1103 transitions, 4400 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:22:43,650 INFO L242 Difference]: Finished difference. Result has 397 places, 717 transitions, 2472 flow [2021-10-15 19:22:43,653 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2472, PETRI_PLACES=397, PETRI_TRANSITIONS=717} [2021-10-15 19:22:43,654 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, 4 predicate places. [2021-10-15 19:22:43,655 INFO L470 AbstractCegarLoop]: Abstraction has has 397 places, 717 transitions, 2472 flow [2021-10-15 19:22:43,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 19:22:43,656 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:43,657 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:43,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:22:43,657 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:22:43,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:43,658 INFO L82 PathProgramCache]: Analyzing trace with hash 819429811, now seen corresponding path program 1 times [2021-10-15 19:22:43,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:43,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997095749] [2021-10-15 19:22:43,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:43,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:43,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:43,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997095749] [2021-10-15 19:22:43,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997095749] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:43,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:43,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:22:43,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843693409] [2021-10-15 19:22:43,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:22:43,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:43,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:22:43,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:22:43,909 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:22:43,910 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 717 transitions, 2472 flow. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 19:22:43,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:43,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:22:43,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:46,193 INFO L129 PetriNetUnfolder]: 373/1363 cut-off events. [2021-10-15 19:22:46,193 INFO L130 PetriNetUnfolder]: For 223/223 co-relation queries the response was YES. [2021-10-15 19:22:46,197 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3248 conditions, 1363 events. 373/1363 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1866 event pairs, 0 based on Foata normal form. 132/1495 useless extension candidates. Maximal degree in co-relation 1438. Up to 979 conditions per place. [2021-10-15 19:22:46,208 INFO L132 encePairwiseOnDemand]: 590/723 looper letters, 900 selfloop transitions, 124 changer transitions 0/1030 dead transitions. [2021-10-15 19:22:46,208 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1030 transitions, 5172 flow [2021-10-15 19:22:46,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:22:46,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:22:46,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1063 transitions. [2021-10-15 19:22:46,215 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4900875979714154 [2021-10-15 19:22:46,216 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1063 transitions. [2021-10-15 19:22:46,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1063 transitions. [2021-10-15 19:22:46,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:46,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1063 transitions. [2021-10-15 19:22:46,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.3333333333333) internal successors, (1063), 3 states have internal predecessors, (1063), 0 states have call successors, (0), 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 19:22:46,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:22:46,237 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:22:46,238 INFO L186 Difference]: Start difference. First operand has 397 places, 717 transitions, 2472 flow. Second operand 3 states and 1063 transitions. [2021-10-15 19:22:46,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1030 transitions, 5172 flow [2021-10-15 19:22:46,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1030 transitions, 4856 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:22:46,328 INFO L242 Difference]: Finished difference. Result has 339 places, 705 transitions, 2792 flow [2021-10-15 19:22:46,333 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2792, PETRI_PLACES=339, PETRI_TRANSITIONS=705} [2021-10-15 19:22:46,341 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -54 predicate places. [2021-10-15 19:22:46,341 INFO L470 AbstractCegarLoop]: Abstraction has has 339 places, 705 transitions, 2792 flow [2021-10-15 19:22:46,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 19:22:46,342 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:46,343 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:46,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:22:46,343 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:22:46,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:46,347 INFO L82 PathProgramCache]: Analyzing trace with hash 457543672, now seen corresponding path program 1 times [2021-10-15 19:22:46,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:46,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361486092] [2021-10-15 19:22:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:46,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:22:46,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:46,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361486092] [2021-10-15 19:22:46,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361486092] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:46,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:46,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:22:46,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510443032] [2021-10-15 19:22:46,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:22:46,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:46,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:22:46,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:22:46,533 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:22:46,533 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 705 transitions, 2792 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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 19:22:46,533 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:46,534 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:22:46,534 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:49,212 INFO L129 PetriNetUnfolder]: 487/2464 cut-off events. [2021-10-15 19:22:49,212 INFO L130 PetriNetUnfolder]: For 876/876 co-relation queries the response was YES. [2021-10-15 19:22:49,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5801 conditions, 2464 events. 487/2464 cut-off events. For 876/876 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 6353 event pairs, 0 based on Foata normal form. 259/2723 useless extension candidates. Maximal degree in co-relation 3595. Up to 1332 conditions per place. [2021-10-15 19:22:49,244 INFO L132 encePairwiseOnDemand]: 457/723 looper letters, 829 selfloop transitions, 309 changer transitions 0/1144 dead transitions. [2021-10-15 19:22:49,244 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1144 transitions, 6352 flow [2021-10-15 19:22:49,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:22:49,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:22:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1208 transitions. [2021-10-15 19:22:49,256 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5569386814200092 [2021-10-15 19:22:49,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1208 transitions. [2021-10-15 19:22:49,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1208 transitions. [2021-10-15 19:22:49,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:49,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1208 transitions. [2021-10-15 19:22:49,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 402.6666666666667) internal successors, (1208), 3 states have internal predecessors, (1208), 0 states have call successors, (0), 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 19:22:49,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:22:49,273 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:22:49,273 INFO L186 Difference]: Start difference. First operand has 339 places, 705 transitions, 2792 flow. Second operand 3 states and 1208 transitions. [2021-10-15 19:22:49,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1144 transitions, 6352 flow [2021-10-15 19:22:49,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1144 transitions, 6038 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:22:49,321 INFO L242 Difference]: Finished difference. Result has 341 places, 819 transitions, 4706 flow [2021-10-15 19:22:49,322 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4706, PETRI_PLACES=341, PETRI_TRANSITIONS=819} [2021-10-15 19:22:49,323 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -52 predicate places. [2021-10-15 19:22:49,323 INFO L470 AbstractCegarLoop]: Abstraction has has 341 places, 819 transitions, 4706 flow [2021-10-15 19:22:49,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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 19:22:49,323 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:49,324 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:49,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:22:49,324 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:22:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:49,325 INFO L82 PathProgramCache]: Analyzing trace with hash -545292928, now seen corresponding path program 1 times [2021-10-15 19:22:49,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:49,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195819213] [2021-10-15 19:22:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:49,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-10-15 19:22:49,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:49,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195819213] [2021-10-15 19:22:49,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195819213] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:49,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:49,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:22:49,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571833386] [2021-10-15 19:22:49,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:22:49,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:49,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:22:49,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:22:49,531 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:22:49,532 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 819 transitions, 4706 flow. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 19:22:49,532 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:49,532 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:22:49,533 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:52,683 INFO L129 PetriNetUnfolder]: 560/3195 cut-off events. [2021-10-15 19:22:52,683 INFO L130 PetriNetUnfolder]: For 2407/2407 co-relation queries the response was YES. [2021-10-15 19:22:52,687 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8096 conditions, 3195 events. 560/3195 cut-off events. For 2407/2407 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 8402 event pairs, 0 based on Foata normal form. 192/3387 useless extension candidates. Maximal degree in co-relation 3303. Up to 2460 conditions per place. [2021-10-15 19:22:52,712 INFO L132 encePairwiseOnDemand]: 518/723 looper letters, 986 selfloop transitions, 225 changer transitions 0/1217 dead transitions. [2021-10-15 19:22:52,712 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1217 transitions, 8324 flow [2021-10-15 19:22:52,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:22:52,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:22:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1142 transitions. [2021-10-15 19:22:52,720 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5265099124020286 [2021-10-15 19:22:52,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1142 transitions. [2021-10-15 19:22:52,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1142 transitions. [2021-10-15 19:22:52,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:52,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1142 transitions. [2021-10-15 19:22:52,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 380.6666666666667) internal successors, (1142), 3 states have internal predecessors, (1142), 0 states have call successors, (0), 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 19:22:52,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:22:52,738 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:22:52,738 INFO L186 Difference]: Start difference. First operand has 341 places, 819 transitions, 4706 flow. Second operand 3 states and 1142 transitions. [2021-10-15 19:22:52,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1217 transitions, 8324 flow [2021-10-15 19:22:52,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1217 transitions, 7612 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:22:52,796 INFO L242 Difference]: Finished difference. Result has 343 places, 892 transitions, 5678 flow [2021-10-15 19:22:52,798 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=4088, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5678, PETRI_PLACES=343, PETRI_TRANSITIONS=892} [2021-10-15 19:22:52,798 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -50 predicate places. [2021-10-15 19:22:52,798 INFO L470 AbstractCegarLoop]: Abstraction has has 343 places, 892 transitions, 5678 flow [2021-10-15 19:22:52,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 19:22:52,799 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:52,800 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:52,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:22:52,800 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:22:52,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:52,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1691402641, now seen corresponding path program 1 times [2021-10-15 19:22:52,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:52,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402863500] [2021-10-15 19:22:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:52,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-10-15 19:22:53,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:53,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402863500] [2021-10-15 19:22:53,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402863500] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:53,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:53,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:22:53,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769998014] [2021-10-15 19:22:53,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:22:53,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:53,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:22:53,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:22:53,021 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:22:53,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 892 transitions, 5678 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 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 19:22:53,023 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:53,023 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:22:53,024 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:22:58,635 INFO L129 PetriNetUnfolder]: 980/6247 cut-off events. [2021-10-15 19:22:58,635 INFO L130 PetriNetUnfolder]: For 4994/4994 co-relation queries the response was YES. [2021-10-15 19:22:58,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15849 conditions, 6247 events. 980/6247 cut-off events. For 4994/4994 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 28388 event pairs, 0 based on Foata normal form. 140/6387 useless extension candidates. Maximal degree in co-relation 8543. Up to 3310 conditions per place. [2021-10-15 19:22:58,668 INFO L132 encePairwiseOnDemand]: 481/723 looper letters, 1173 selfloop transitions, 458 changer transitions 0/1637 dead transitions. [2021-10-15 19:22:58,668 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1637 transitions, 13364 flow [2021-10-15 19:22:58,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:22:58,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:22:58,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1208 transitions. [2021-10-15 19:22:58,675 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5569386814200092 [2021-10-15 19:22:58,675 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1208 transitions. [2021-10-15 19:22:58,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1208 transitions. [2021-10-15 19:22:58,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:22:58,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1208 transitions. [2021-10-15 19:22:58,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 402.6666666666667) internal successors, (1208), 3 states have internal predecessors, (1208), 0 states have call successors, (0), 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 19:22:58,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:22:58,692 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:22:58,692 INFO L186 Difference]: Start difference. First operand has 343 places, 892 transitions, 5678 flow. Second operand 3 states and 1208 transitions. [2021-10-15 19:22:58,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1637 transitions, 13364 flow [2021-10-15 19:22:58,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1637 transitions, 11752 flow, removed 406 selfloop flow, removed 2 redundant places. [2021-10-15 19:22:58,796 INFO L242 Difference]: Finished difference. Result has 345 places, 1263 transitions, 10174 flow [2021-10-15 19:22:58,797 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=4774, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=10174, PETRI_PLACES=345, PETRI_TRANSITIONS=1263} [2021-10-15 19:22:58,798 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -48 predicate places. [2021-10-15 19:22:58,798 INFO L470 AbstractCegarLoop]: Abstraction has has 345 places, 1263 transitions, 10174 flow [2021-10-15 19:22:58,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 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 19:22:58,798 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:22:58,799 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:22:58,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:22:58,800 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:22:58,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:22:58,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1501408232, now seen corresponding path program 1 times [2021-10-15 19:22:58,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:22:58,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848004564] [2021-10-15 19:22:58,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:22:58,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:22:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:22:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 218 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-15 19:22:59,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:22:59,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848004564] [2021-10-15 19:22:59,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848004564] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:22:59,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:22:59,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:22:59,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832102324] [2021-10-15 19:22:59,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:22:59,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:22:59,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:22:59,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:22:59,144 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 723 [2021-10-15 19:22:59,144 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 1263 transitions, 10174 flow. Second operand has 4 states, 4 states have (on average 96.75) internal successors, (387), 4 states have internal predecessors, (387), 0 states have call successors, (0), 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 19:22:59,144 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:22:59,144 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 723 [2021-10-15 19:22:59,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:23:04,479 INFO L129 PetriNetUnfolder]: 974/6285 cut-off events. [2021-10-15 19:23:04,479 INFO L130 PetriNetUnfolder]: For 6363/6363 co-relation queries the response was YES. [2021-10-15 19:23:04,483 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16424 conditions, 6285 events. 974/6285 cut-off events. For 6363/6363 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 26666 event pairs, 0 based on Foata normal form. 6/6291 useless extension candidates. Maximal degree in co-relation 6633. Up to 5177 conditions per place. [2021-10-15 19:23:04,506 INFO L132 encePairwiseOnDemand]: 531/723 looper letters, 905 selfloop transitions, 677 changer transitions 0/1587 dead transitions. [2021-10-15 19:23:04,506 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1587 transitions, 13950 flow [2021-10-15 19:23:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:23:04,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:23:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 972 transitions. [2021-10-15 19:23:04,512 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2688796680497925 [2021-10-15 19:23:04,512 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 972 transitions. [2021-10-15 19:23:04,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 972 transitions. [2021-10-15 19:23:04,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:23:04,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 972 transitions. [2021-10-15 19:23:04,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 194.4) internal successors, (972), 5 states have internal predecessors, (972), 0 states have call successors, (0), 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 19:23:04,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 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 19:23:04,527 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 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 19:23:04,527 INFO L186 Difference]: Start difference. First operand has 345 places, 1263 transitions, 10174 flow. Second operand 5 states and 972 transitions. [2021-10-15 19:23:04,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1587 transitions, 13950 flow [2021-10-15 19:23:04,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1587 transitions, 13036 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:23:04,618 INFO L242 Difference]: Finished difference. Result has 350 places, 1262 transitions, 11266 flow [2021-10-15 19:23:04,620 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=9208, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=673, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=11266, PETRI_PLACES=350, PETRI_TRANSITIONS=1262} [2021-10-15 19:23:04,620 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -43 predicate places. [2021-10-15 19:23:04,621 INFO L470 AbstractCegarLoop]: Abstraction has has 350 places, 1262 transitions, 11266 flow [2021-10-15 19:23:04,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.75) internal successors, (387), 4 states have internal predecessors, (387), 0 states have call successors, (0), 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 19:23:04,621 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:23:04,622 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:04,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:23:04,622 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:23:04,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:04,623 INFO L82 PathProgramCache]: Analyzing trace with hash 345573446, now seen corresponding path program 1 times [2021-10-15 19:23:04,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:04,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445806092] [2021-10-15 19:23:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:04,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 441 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2021-10-15 19:23:04,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:04,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445806092] [2021-10-15 19:23:04,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445806092] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:23:04,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:23:04,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:23:04,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658075344] [2021-10-15 19:23:04,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:23:04,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:04,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:23:04,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:23:04,958 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:23:04,958 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 1262 transitions, 11266 flow. Second operand has 7 states, 7 states have (on average 64.14285714285714) internal successors, (449), 7 states have internal predecessors, (449), 0 states have call successors, (0), 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 19:23:04,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:23:04,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:23:04,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:23:11,277 INFO L129 PetriNetUnfolder]: 960/6136 cut-off events. [2021-10-15 19:23:11,277 INFO L130 PetriNetUnfolder]: For 10251/10251 co-relation queries the response was YES. [2021-10-15 19:23:11,286 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16364 conditions, 6136 events. 960/6136 cut-off events. For 10251/10251 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 25641 event pairs, 0 based on Foata normal form. 2/6138 useless extension candidates. Maximal degree in co-relation 14274. Up to 3534 conditions per place. [2021-10-15 19:23:11,300 INFO L132 encePairwiseOnDemand]: 537/723 looper letters, 911 selfloop transitions, 63 changer transitions 687/1669 dead transitions. [2021-10-15 19:23:11,300 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1669 transitions, 15298 flow [2021-10-15 19:23:11,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:23:11,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:23:11,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1102 transitions. [2021-10-15 19:23:11,309 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.21774352894684845 [2021-10-15 19:23:11,309 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1102 transitions. [2021-10-15 19:23:11,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1102 transitions. [2021-10-15 19:23:11,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:23:11,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1102 transitions. [2021-10-15 19:23:11,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 157.42857142857142) internal successors, (1102), 7 states have internal predecessors, (1102), 0 states have call successors, (0), 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 19:23:11,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 723.0) internal successors, (5784), 8 states have internal predecessors, (5784), 0 states have call successors, (0), 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 19:23:11,328 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 723.0) internal successors, (5784), 8 states have internal predecessors, (5784), 0 states have call successors, (0), 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 19:23:11,328 INFO L186 Difference]: Start difference. First operand has 350 places, 1262 transitions, 11266 flow. Second operand 7 states and 1102 transitions. [2021-10-15 19:23:11,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1669 transitions, 15298 flow [2021-10-15 19:23:11,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 1669 transitions, 15264 flow, removed 17 selfloop flow, removed 0 redundant places. [2021-10-15 19:23:11,533 INFO L242 Difference]: Finished difference. Result has 360 places, 657 transitions, 4534 flow [2021-10-15 19:23:11,535 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=11106, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4534, PETRI_PLACES=360, PETRI_TRANSITIONS=657} [2021-10-15 19:23:11,536 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -33 predicate places. [2021-10-15 19:23:11,537 INFO L470 AbstractCegarLoop]: Abstraction has has 360 places, 657 transitions, 4534 flow [2021-10-15 19:23:11,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.14285714285714) internal successors, (449), 7 states have internal predecessors, (449), 0 states have call successors, (0), 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 19:23:11,538 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:23:11,538 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:11,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:23:11,539 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:23:11,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:11,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1799878056, now seen corresponding path program 1 times [2021-10-15 19:23:11,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:11,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440720230] [2021-10-15 19:23:11,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:11,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 563 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-15 19:23:11,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:11,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440720230] [2021-10-15 19:23:11,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440720230] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:23:11,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:23:11,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:23:11,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674882710] [2021-10-15 19:23:11,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:23:11,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:11,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:23:11,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:23:11,886 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:23:11,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 657 transitions, 4534 flow. Second operand has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 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 19:23:11,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:23:11,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:23:11,888 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:23:19,712 INFO L129 PetriNetUnfolder]: 596/9553 cut-off events. [2021-10-15 19:23:19,713 INFO L130 PetriNetUnfolder]: For 8380/8380 co-relation queries the response was YES. [2021-10-15 19:23:19,733 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21880 conditions, 9553 events. 596/9553 cut-off events. For 8380/8380 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 54950 event pairs, 0 based on Foata normal form. 104/9657 useless extension candidates. Maximal degree in co-relation 16103. Up to 4515 conditions per place. [2021-10-15 19:23:19,759 INFO L132 encePairwiseOnDemand]: 617/723 looper letters, 1194 selfloop transitions, 353 changer transitions 0/1555 dead transitions. [2021-10-15 19:23:19,759 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1555 transitions, 11857 flow [2021-10-15 19:23:19,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:23:19,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:23:19,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1327 transitions. [2021-10-15 19:23:19,766 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45885200553250344 [2021-10-15 19:23:19,766 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1327 transitions. [2021-10-15 19:23:19,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1327 transitions. [2021-10-15 19:23:19,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:23:19,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1327 transitions. [2021-10-15 19:23:19,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 331.75) internal successors, (1327), 4 states have internal predecessors, (1327), 0 states have call successors, (0), 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 19:23:19,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 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 19:23:19,782 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 723.0) internal successors, (3615), 5 states have internal predecessors, (3615), 0 states have call successors, (0), 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 19:23:19,783 INFO L186 Difference]: Start difference. First operand has 360 places, 657 transitions, 4534 flow. Second operand 4 states and 1327 transitions. [2021-10-15 19:23:19,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 1555 transitions, 11857 flow [2021-10-15 19:23:19,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1555 transitions, 11727 flow, removed 12 selfloop flow, removed 5 redundant places. [2021-10-15 19:23:19,886 INFO L242 Difference]: Finished difference. Result has 357 places, 898 transitions, 9072 flow [2021-10-15 19:23:19,887 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=4452, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=9072, PETRI_PLACES=357, PETRI_TRANSITIONS=898} [2021-10-15 19:23:19,888 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -36 predicate places. [2021-10-15 19:23:19,888 INFO L470 AbstractCegarLoop]: Abstraction has has 357 places, 898 transitions, 9072 flow [2021-10-15 19:23:19,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 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 19:23:19,889 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:23:19,890 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:19,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:23:19,890 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:23:19,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:19,891 INFO L82 PathProgramCache]: Analyzing trace with hash -848471991, now seen corresponding path program 1 times [2021-10-15 19:23:19,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:19,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428081958] [2021-10-15 19:23:19,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:19,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 865 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-10-15 19:23:20,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:20,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428081958] [2021-10-15 19:23:20,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428081958] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:23:20,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:23:20,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:23:20,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070306705] [2021-10-15 19:23:20,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:23:20,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:20,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:23:20,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:23:20,200 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:23:20,200 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 898 transitions, 9072 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 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 19:23:20,201 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:23:20,201 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:23:20,201 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:23:32,948 INFO L129 PetriNetUnfolder]: 884/13487 cut-off events. [2021-10-15 19:23:32,948 INFO L130 PetriNetUnfolder]: For 19389/19389 co-relation queries the response was YES. [2021-10-15 19:23:32,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32290 conditions, 13487 events. 884/13487 cut-off events. For 19389/19389 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 81620 event pairs, 0 based on Foata normal form. 93/13580 useless extension candidates. Maximal degree in co-relation 22365. Up to 9345 conditions per place. [2021-10-15 19:23:33,001 INFO L132 encePairwiseOnDemand]: 617/723 looper letters, 1091 selfloop transitions, 399 changer transitions 0/1498 dead transitions. [2021-10-15 19:23:33,001 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1498 transitions, 16743 flow [2021-10-15 19:23:33,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:23:33,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:23:33,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 888 transitions. [2021-10-15 19:23:33,006 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4094052558782849 [2021-10-15 19:23:33,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 888 transitions. [2021-10-15 19:23:33,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 888 transitions. [2021-10-15 19:23:33,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:23:33,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 888 transitions. [2021-10-15 19:23:33,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 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 19:23:33,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:23:33,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:23:33,017 INFO L186 Difference]: Start difference. First operand has 357 places, 898 transitions, 9072 flow. Second operand 3 states and 888 transitions. [2021-10-15 19:23:33,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 1498 transitions, 16743 flow [2021-10-15 19:23:33,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1498 transitions, 16743 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:23:33,161 INFO L242 Difference]: Finished difference. Result has 361 places, 1173 transitions, 15315 flow [2021-10-15 19:23:33,163 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=9021, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=895, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=15315, PETRI_PLACES=361, PETRI_TRANSITIONS=1173} [2021-10-15 19:23:33,163 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -32 predicate places. [2021-10-15 19:23:33,164 INFO L470 AbstractCegarLoop]: Abstraction has has 361 places, 1173 transitions, 15315 flow [2021-10-15 19:23:33,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 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 19:23:33,164 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:23:33,165 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:33,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:23:33,166 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:23:33,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:33,167 INFO L82 PathProgramCache]: Analyzing trace with hash 641083631, now seen corresponding path program 1 times [2021-10-15 19:23:33,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:33,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362724638] [2021-10-15 19:23:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:33,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1586 backedges. 974 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-10-15 19:23:33,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:33,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362724638] [2021-10-15 19:23:33,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362724638] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:23:33,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:23:33,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:23:33,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608317325] [2021-10-15 19:23:33,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:23:33,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:33,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:23:33,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:23:33,537 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:23:33,538 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 1173 transitions, 15315 flow. Second operand has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 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 19:23:33,538 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:23:33,538 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:23:33,539 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:23:47,737 INFO L129 PetriNetUnfolder]: 881/13484 cut-off events. [2021-10-15 19:23:47,737 INFO L130 PetriNetUnfolder]: For 25459/25459 co-relation queries the response was YES. [2021-10-15 19:23:47,764 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33418 conditions, 13484 events. 881/13484 cut-off events. For 25459/25459 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 79472 event pairs, 0 based on Foata normal form. 3/13487 useless extension candidates. Maximal degree in co-relation 23198. Up to 12580 conditions per place. [2021-10-15 19:23:47,794 INFO L132 encePairwiseOnDemand]: 716/723 looper letters, 1484 selfloop transitions, 5 changer transitions 0/1497 dead transitions. [2021-10-15 19:23:47,794 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1497 transitions, 18921 flow [2021-10-15 19:23:47,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:23:47,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:23:47,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 790 transitions. [2021-10-15 19:23:47,799 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36422314430613184 [2021-10-15 19:23:47,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 790 transitions. [2021-10-15 19:23:47,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 790 transitions. [2021-10-15 19:23:47,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:23:47,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 790 transitions. [2021-10-15 19:23:47,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 0 states have call successors, (0), 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 19:23:47,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:23:47,811 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:23:47,811 INFO L186 Difference]: Start difference. First operand has 361 places, 1173 transitions, 15315 flow. Second operand 3 states and 790 transitions. [2021-10-15 19:23:47,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1497 transitions, 18921 flow [2021-10-15 19:23:47,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1497 transitions, 17477 flow, removed 325 selfloop flow, removed 2 redundant places. [2021-10-15 19:23:47,993 INFO L242 Difference]: Finished difference. Result has 362 places, 1171 transitions, 13849 flow [2021-10-15 19:23:47,995 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=13832, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=13849, PETRI_PLACES=362, PETRI_TRANSITIONS=1171} [2021-10-15 19:23:47,995 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -31 predicate places. [2021-10-15 19:23:47,996 INFO L470 AbstractCegarLoop]: Abstraction has has 362 places, 1171 transitions, 13849 flow [2021-10-15 19:23:47,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 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 19:23:47,996 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:23:47,997 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:23:47,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:23:47,998 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:23:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:23:47,999 INFO L82 PathProgramCache]: Analyzing trace with hash -66653955, now seen corresponding path program 1 times [2021-10-15 19:23:47,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:23:47,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538090663] [2021-10-15 19:23:48,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:23:48,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:23:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:23:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1647 backedges. 943 proven. 0 refuted. 0 times theorem prover too weak. 704 trivial. 0 not checked. [2021-10-15 19:23:48,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:23:48,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538090663] [2021-10-15 19:23:48,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538090663] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:23:48,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:23:48,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:23:48,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817595874] [2021-10-15 19:23:48,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:23:48,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:23:48,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:23:48,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:23:48,496 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:23:48,497 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 1171 transitions, 13849 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 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 19:23:48,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:23:48,498 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:23:48,498 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:24:06,240 INFO L129 PetriNetUnfolder]: 904/16489 cut-off events. [2021-10-15 19:24:06,240 INFO L130 PetriNetUnfolder]: For 26582/26582 co-relation queries the response was YES. [2021-10-15 19:24:06,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38781 conditions, 16489 events. 904/16489 cut-off events. For 26582/26582 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 105608 event pairs, 0 based on Foata normal form. 309/16798 useless extension candidates. Maximal degree in co-relation 26820. Up to 12451 conditions per place. [2021-10-15 19:24:06,297 INFO L132 encePairwiseOnDemand]: 618/723 looper letters, 1320 selfloop transitions, 193 changer transitions 0/1521 dead transitions. [2021-10-15 19:24:06,297 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1521 transitions, 17872 flow [2021-10-15 19:24:06,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:24:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:24:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 888 transitions. [2021-10-15 19:24:06,302 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4094052558782849 [2021-10-15 19:24:06,302 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 888 transitions. [2021-10-15 19:24:06,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 888 transitions. [2021-10-15 19:24:06,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:24:06,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 888 transitions. [2021-10-15 19:24:06,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 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 19:24:06,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:24:06,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:24:06,313 INFO L186 Difference]: Start difference. First operand has 362 places, 1171 transitions, 13849 flow. Second operand 3 states and 888 transitions. [2021-10-15 19:24:06,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1521 transitions, 17872 flow [2021-10-15 19:24:06,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1521 transitions, 17863 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-10-15 19:24:06,439 INFO L242 Difference]: Finished difference. Result has 365 places, 1196 transitions, 15513 flow [2021-10-15 19:24:06,441 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=13330, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=947, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=15513, PETRI_PLACES=365, PETRI_TRANSITIONS=1196} [2021-10-15 19:24:06,442 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -28 predicate places. [2021-10-15 19:24:06,442 INFO L470 AbstractCegarLoop]: Abstraction has has 365 places, 1196 transitions, 15513 flow [2021-10-15 19:24:06,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 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 19:24:06,443 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:24:06,443 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:24:06,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 19:24:06,444 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:24:06,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:24:06,445 INFO L82 PathProgramCache]: Analyzing trace with hash 902031348, now seen corresponding path program 1 times [2021-10-15 19:24:06,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:24:06,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823043436] [2021-10-15 19:24:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:24:06,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:24:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:24:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 590 proven. 0 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-10-15 19:24:06,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:24:06,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823043436] [2021-10-15 19:24:06,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823043436] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:24:06,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:24:06,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:24:06,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528003260] [2021-10-15 19:24:06,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:24:06,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:24:06,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:24:06,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:24:06,839 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:24:06,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 1196 transitions, 15513 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 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 19:24:06,839 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:24:06,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:24:06,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:24:31,469 INFO L129 PetriNetUnfolder]: 891/21106 cut-off events. [2021-10-15 19:24:31,470 INFO L130 PetriNetUnfolder]: For 34574/34574 co-relation queries the response was YES. [2021-10-15 19:24:31,512 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48554 conditions, 21106 events. 891/21106 cut-off events. For 34574/34574 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 131390 event pairs, 0 based on Foata normal form. 371/21477 useless extension candidates. Maximal degree in co-relation 36645. Up to 15339 conditions per place. [2021-10-15 19:24:31,542 INFO L132 encePairwiseOnDemand]: 633/723 looper letters, 1319 selfloop transitions, 137 changer transitions 43/1507 dead transitions. [2021-10-15 19:24:31,542 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1507 transitions, 18868 flow [2021-10-15 19:24:31,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:24:31,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:24:31,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 868 transitions. [2021-10-15 19:24:31,546 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4001844167819272 [2021-10-15 19:24:31,546 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 868 transitions. [2021-10-15 19:24:31,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 868 transitions. [2021-10-15 19:24:31,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:24:31,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 868 transitions. [2021-10-15 19:24:31,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 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 19:24:31,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:24:31,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:24:31,557 INFO L186 Difference]: Start difference. First operand has 365 places, 1196 transitions, 15513 flow. Second operand 3 states and 868 transitions. [2021-10-15 19:24:31,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1507 transitions, 18868 flow [2021-10-15 19:24:31,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1507 transitions, 18476 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:24:31,696 INFO L242 Difference]: Finished difference. Result has 367 places, 1139 transitions, 15349 flow [2021-10-15 19:24:31,698 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=13892, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=986, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=15349, PETRI_PLACES=367, PETRI_TRANSITIONS=1139} [2021-10-15 19:24:31,698 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -26 predicate places. [2021-10-15 19:24:31,698 INFO L470 AbstractCegarLoop]: Abstraction has has 367 places, 1139 transitions, 15349 flow [2021-10-15 19:24:31,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 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 19:24:31,699 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:24:31,700 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:24:31,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 19:24:31,701 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:24:31,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:24:31,702 INFO L82 PathProgramCache]: Analyzing trace with hash 32097893, now seen corresponding path program 1 times [2021-10-15 19:24:31,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:24:31,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038110208] [2021-10-15 19:24:31,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:24:31,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:24:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:24:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 657 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2021-10-15 19:24:32,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:24:32,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038110208] [2021-10-15 19:24:32,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038110208] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:24:32,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:24:32,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:24:32,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679680162] [2021-10-15 19:24:32,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:24:32,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:24:32,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:24:32,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:24:32,212 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:24:32,213 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 1139 transitions, 15349 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 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 19:24:32,213 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:24:32,213 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:24:32,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:24:56,695 INFO L129 PetriNetUnfolder]: 739/21609 cut-off events. [2021-10-15 19:24:56,695 INFO L130 PetriNetUnfolder]: For 33325/33325 co-relation queries the response was YES. [2021-10-15 19:24:56,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48760 conditions, 21609 events. 739/21609 cut-off events. For 33325/33325 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 134941 event pairs, 0 based on Foata normal form. 313/21922 useless extension candidates. Maximal degree in co-relation 36876. Up to 15225 conditions per place. [2021-10-15 19:24:56,770 INFO L132 encePairwiseOnDemand]: 651/723 looper letters, 1201 selfloop transitions, 110 changer transitions 38/1357 dead transitions. [2021-10-15 19:24:56,770 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1357 transitions, 16584 flow [2021-10-15 19:24:56,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:24:56,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:24:56,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 839 transitions. [2021-10-15 19:24:56,773 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3868142000922084 [2021-10-15 19:24:56,773 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 839 transitions. [2021-10-15 19:24:56,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 839 transitions. [2021-10-15 19:24:56,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:24:56,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 839 transitions. [2021-10-15 19:24:56,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.6666666666667) internal successors, (839), 3 states have internal predecessors, (839), 0 states have call successors, (0), 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 19:24:56,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:24:56,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:24:56,784 INFO L186 Difference]: Start difference. First operand has 367 places, 1139 transitions, 15349 flow. Second operand 3 states and 839 transitions. [2021-10-15 19:24:56,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1357 transitions, 16584 flow [2021-10-15 19:24:57,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1357 transitions, 16308 flow, removed 26 selfloop flow, removed 2 redundant places. [2021-10-15 19:24:57,063 INFO L242 Difference]: Finished difference. Result has 369 places, 994 transitions, 13096 flow [2021-10-15 19:24:57,065 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=12007, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=978, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=868, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=13096, PETRI_PLACES=369, PETRI_TRANSITIONS=994} [2021-10-15 19:24:57,065 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -24 predicate places. [2021-10-15 19:24:57,065 INFO L470 AbstractCegarLoop]: Abstraction has has 369 places, 994 transitions, 13096 flow [2021-10-15 19:24:57,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 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 19:24:57,066 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:24:57,067 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:24:57,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 19:24:57,067 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:24:57,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:24:57,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1739855447, now seen corresponding path program 1 times [2021-10-15 19:24:57,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:24:57,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730510236] [2021-10-15 19:24:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:24:57,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:24:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:24:57,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4128 backedges. 2695 proven. 0 refuted. 0 times theorem prover too weak. 1433 trivial. 0 not checked. [2021-10-15 19:24:57,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:24:57,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730510236] [2021-10-15 19:24:57,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730510236] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:24:57,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:24:57,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:24:57,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644038442] [2021-10-15 19:24:57,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:24:57,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:24:57,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:24:57,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:24:57,615 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:24:57,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 994 transitions, 13096 flow. Second operand has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 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 19:24:57,616 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:24:57,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:24:57,616 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:18,922 INFO L129 PetriNetUnfolder]: 648/20196 cut-off events. [2021-10-15 19:25:18,922 INFO L130 PetriNetUnfolder]: For 25556/25556 co-relation queries the response was YES. [2021-10-15 19:25:18,966 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45508 conditions, 20196 events. 648/20196 cut-off events. For 25556/25556 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 122392 event pairs, 0 based on Foata normal form. 91/20287 useless extension candidates. Maximal degree in co-relation 34533. Up to 16783 conditions per place. [2021-10-15 19:25:18,993 INFO L132 encePairwiseOnDemand]: 668/723 looper letters, 1101 selfloop transitions, 161 changer transitions 0/1270 dead transitions. [2021-10-15 19:25:18,993 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1270 transitions, 15335 flow [2021-10-15 19:25:18,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:25:18,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:25:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 818 transitions. [2021-10-15 19:25:18,996 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3771323190410327 [2021-10-15 19:25:18,996 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 818 transitions. [2021-10-15 19:25:18,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 818 transitions. [2021-10-15 19:25:18,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:18,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 818 transitions. [2021-10-15 19:25:18,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 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 19:25:19,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:25:19,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:25:19,005 INFO L186 Difference]: Start difference. First operand has 369 places, 994 transitions, 13096 flow. Second operand 3 states and 818 transitions. [2021-10-15 19:25:19,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1270 transitions, 15335 flow [2021-10-15 19:25:19,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1270 transitions, 15101 flow, removed 15 selfloop flow, removed 2 redundant places. [2021-10-15 19:25:19,115 INFO L242 Difference]: Finished difference. Result has 371 places, 945 transitions, 12633 flow [2021-10-15 19:25:19,116 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=11782, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=937, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=12633, PETRI_PLACES=371, PETRI_TRANSITIONS=945} [2021-10-15 19:25:19,117 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -22 predicate places. [2021-10-15 19:25:19,117 INFO L470 AbstractCegarLoop]: Abstraction has has 371 places, 945 transitions, 12633 flow [2021-10-15 19:25:19,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 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 19:25:19,117 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:19,118 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:25:19,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-15 19:25:19,119 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:19,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:19,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1701008172, now seen corresponding path program 1 times [2021-10-15 19:25:19,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:19,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115429032] [2021-10-15 19:25:19,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:19,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4256 backedges. 2866 proven. 0 refuted. 0 times theorem prover too weak. 1390 trivial. 0 not checked. [2021-10-15 19:25:19,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:19,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115429032] [2021-10-15 19:25:19,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115429032] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:19,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:25:19,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:25:19,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170899700] [2021-10-15 19:25:19,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:25:19,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:19,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:25:19,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:25:19,647 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:25:19,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 945 transitions, 12633 flow. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 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 19:25:19,648 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:19,648 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:25:19,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:39,543 INFO L129 PetriNetUnfolder]: 538/20086 cut-off events. [2021-10-15 19:25:39,543 INFO L130 PetriNetUnfolder]: For 24428/24428 co-relation queries the response was YES. [2021-10-15 19:25:39,589 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44672 conditions, 20086 events. 538/20086 cut-off events. For 24428/24428 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 121365 event pairs, 0 based on Foata normal form. 110/20196 useless extension candidates. Maximal degree in co-relation 30904. Up to 17014 conditions per place. [2021-10-15 19:25:39,623 INFO L132 encePairwiseOnDemand]: 651/723 looper letters, 1022 selfloop transitions, 132 changer transitions 0/1162 dead transitions. [2021-10-15 19:25:39,623 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 1162 transitions, 13627 flow [2021-10-15 19:25:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:25:39,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:25:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 829 transitions. [2021-10-15 19:25:39,627 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3822037805440295 [2021-10-15 19:25:39,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 829 transitions. [2021-10-15 19:25:39,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 829 transitions. [2021-10-15 19:25:39,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:39,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 829 transitions. [2021-10-15 19:25:39,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 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 19:25:39,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:25:39,633 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:25:39,633 INFO L186 Difference]: Start difference. First operand has 371 places, 945 transitions, 12633 flow. Second operand 3 states and 829 transitions. [2021-10-15 19:25:39,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 1162 transitions, 13627 flow [2021-10-15 19:25:39,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1162 transitions, 13315 flow, removed 8 selfloop flow, removed 2 redundant places. [2021-10-15 19:25:39,720 INFO L242 Difference]: Finished difference. Result has 371 places, 837 transitions, 10619 flow [2021-10-15 19:25:39,721 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=10355, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=10619, PETRI_PLACES=371, PETRI_TRANSITIONS=837} [2021-10-15 19:25:39,721 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -22 predicate places. [2021-10-15 19:25:39,722 INFO L470 AbstractCegarLoop]: Abstraction has has 371 places, 837 transitions, 10619 flow [2021-10-15 19:25:39,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 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 19:25:39,722 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:39,723 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:25:39,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 19:25:39,723 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:39,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:39,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1554331418, now seen corresponding path program 1 times [2021-10-15 19:25:39,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:39,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668193391] [2021-10-15 19:25:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:39,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3397 backedges. 1612 proven. 0 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2021-10-15 19:25:40,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:40,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668193391] [2021-10-15 19:25:40,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668193391] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:40,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:25:40,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:25:40,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890231038] [2021-10-15 19:25:40,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:25:40,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:40,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:25:40,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:25:40,333 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 723 [2021-10-15 19:25:40,334 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 837 transitions, 10619 flow. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 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 19:25:40,334 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:40,334 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 723 [2021-10-15 19:25:40,334 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:26:00,740 INFO L129 PetriNetUnfolder]: 409/19955 cut-off events. [2021-10-15 19:26:00,741 INFO L130 PetriNetUnfolder]: For 20714/20714 co-relation queries the response was YES. [2021-10-15 19:26:00,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43245 conditions, 19955 events. 409/19955 cut-off events. For 20714/20714 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 118366 event pairs, 0 based on Foata normal form. 130/20085 useless extension candidates. Maximal degree in co-relation 28555. Up to 14306 conditions per place. [2021-10-15 19:26:00,792 INFO L132 encePairwiseOnDemand]: 660/723 looper letters, 0 selfloop transitions, 0 changer transitions 1044/1044 dead transitions. [2021-10-15 19:26:00,792 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1044 transitions, 10980 flow [2021-10-15 19:26:00,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:26:00,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:26:00,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 807 transitions. [2021-10-15 19:26:00,795 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37206085753803597 [2021-10-15 19:26:00,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 807 transitions. [2021-10-15 19:26:00,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 807 transitions. [2021-10-15 19:26:00,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:26:00,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 807 transitions. [2021-10-15 19:26:00,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 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 19:26:00,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:26:00,801 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 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 19:26:00,801 INFO L186 Difference]: Start difference. First operand has 371 places, 837 transitions, 10619 flow. Second operand 3 states and 807 transitions. [2021-10-15 19:26:00,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1044 transitions, 10980 flow [2021-10-15 19:26:00,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 1044 transitions, 10860 flow, removed 4 selfloop flow, removed 1 redundant places. [2021-10-15 19:26:00,857 INFO L242 Difference]: Finished difference. Result has 370 places, 0 transitions, 0 flow [2021-10-15 19:26:00,857 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=8134, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=370, PETRI_TRANSITIONS=0} [2021-10-15 19:26:00,857 INFO L334 CegarLoopForPetriNet]: 393 programPoint places, -23 predicate places. [2021-10-15 19:26:00,858 INFO L470 AbstractCegarLoop]: Abstraction has has 370 places, 0 transitions, 0 flow [2021-10-15 19:26:00,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 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 19:26:00,860 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:26:00,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 19:26:00,866 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:26:00,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:26:00 BoogieIcfgContainer [2021-10-15 19:26:00,871 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:26:00,872 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:26:00,872 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:26:00,872 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:26:00,873 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:22:40" (3/4) ... [2021-10-15 19:26:00,876 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:26:00,910 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-15 19:26:00,914 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:26:00,917 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:26:00,921 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:26:01,127 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9492f7-2b14-41df-9d4f-d60cf0964437/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:26:01,131 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:26:01,133 INFO L168 Benchmark]: Toolchain (without parser) took 205286.44 ms. Allocated memory was 98.6 MB in the beginning and 5.5 GB in the end (delta: 5.4 GB). Free memory was 72.7 MB in the beginning and 3.1 GB in the end (delta: -3.0 GB). Peak memory consumption was 2.4 GB. Max. memory is 16.1 GB. [2021-10-15 19:26:01,133 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 98.6 MB. Free memory is still 72.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:26:01,135 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1204.95 ms. Allocated memory was 98.6 MB in the beginning and 123.7 MB in the end (delta: 25.2 MB). Free memory was 72.7 MB in the beginning and 75.8 MB in the end (delta: -3.2 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:26:01,135 INFO L168 Benchmark]: Boogie Procedure Inliner took 199.96 ms. Allocated memory is still 123.7 MB. Free memory was 75.8 MB in the beginning and 52.1 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:26:01,136 INFO L168 Benchmark]: Boogie Preprocessor took 245.74 ms. Allocated memory is still 123.7 MB. Free memory was 52.1 MB in the beginning and 74.7 MB in the end (delta: -22.6 MB). Peak memory consumption was 29.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:26:01,136 INFO L168 Benchmark]: RCFGBuilder took 2698.12 ms. Allocated memory was 123.7 MB in the beginning and 188.7 MB in the end (delta: 65.0 MB). Free memory was 74.7 MB in the beginning and 99.8 MB in the end (delta: -25.1 MB). Peak memory consumption was 55.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:26:01,136 INFO L168 Benchmark]: TraceAbstraction took 200667.44 ms. Allocated memory was 188.7 MB in the beginning and 5.5 GB in the end (delta: 5.3 GB). Free memory was 99.8 MB in the beginning and 3.1 GB in the end (delta: -3.0 GB). Peak memory consumption was 2.9 GB. Max. memory is 16.1 GB. [2021-10-15 19:26:01,137 INFO L168 Benchmark]: Witness Printer took 259.61 ms. Allocated memory is still 5.5 GB. Free memory was 3.1 GB in the beginning and 3.1 GB in the end (delta: 36.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:26:01,139 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 98.6 MB. Free memory is still 72.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1204.95 ms. Allocated memory was 98.6 MB in the beginning and 123.7 MB in the end (delta: 25.2 MB). Free memory was 72.7 MB in the beginning and 75.8 MB in the end (delta: -3.2 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 199.96 ms. Allocated memory is still 123.7 MB. Free memory was 75.8 MB in the beginning and 52.1 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 245.74 ms. Allocated memory is still 123.7 MB. Free memory was 52.1 MB in the beginning and 74.7 MB in the end (delta: -22.6 MB). Peak memory consumption was 29.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2698.12 ms. Allocated memory was 123.7 MB in the beginning and 188.7 MB in the end (delta: 65.0 MB). Free memory was 74.7 MB in the beginning and 99.8 MB in the end (delta: -25.1 MB). Peak memory consumption was 55.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 200667.44 ms. Allocated memory was 188.7 MB in the beginning and 5.5 GB in the end (delta: 5.3 GB). Free memory was 99.8 MB in the beginning and 3.1 GB in the end (delta: -3.0 GB). Peak memory consumption was 2.9 GB. Max. memory is 16.1 GB. * Witness Printer took 259.61 ms. Allocated memory is still 5.5 GB. Free memory was 3.1 GB in the beginning and 3.1 GB in the end (delta: 36.7 MB). Peak memory consumption was 35.7 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: 152]: 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, 396 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 12.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 200595.5ms, OverallIterations: 16, TraceHistogramMax: 10, EmptinessCheckTime: 0.0ms, AutomataDifference: 194223.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 272.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3879 SDtfs, 4119 SDslu, 91 SDs, 0 SdLazy, 15024 SolverSat, 2755 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18695.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 104.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=15513occurred in iteration=11, InterpolantAutomatonStates: 55, 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: 466.1ms SsaConstructionTime, 1188.4ms SatisfiabilityAnalysisTime, 4038.0ms InterpolantComputationTime, 10866 NumberOfCodeBlocks, 10866 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 10850 ConstructedInterpolants, 0 QuantifiedInterpolants, 26942 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 22702/22702 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 19:26:01,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e9492f7-2b14-41df-9d4f-d60cf0964437/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...