./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/security.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ebed807-9279-4e53-8e13-3c8c4b75df61/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ebed807-9279-4e53-8e13-3c8c4b75df61/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ebed807-9279-4e53-8e13-3c8c4b75df61/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ebed807-9279-4e53-8e13-3c8c4b75df61/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/security.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ebed807-9279-4e53-8e13-3c8c4b75df61/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ebed807-9279-4e53-8e13-3c8c4b75df61/bin/uautomizer-GMMbpWq8iD --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 417dec4be084b2867b601c43d125afd61f7d3912bd17641ca10c0f094ab6abe0 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:45:23,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:45:23,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:45:23,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:45:23,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:45:23,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:45:23,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:45:23,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:45:23,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:45:23,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:45:23,381 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:45:23,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:45:23,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:45:23,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:45:23,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:45:23,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:45:23,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:45:23,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:45:23,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:45:23,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:45:23,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:45:23,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:45:23,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:45:23,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:45:23,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:45:23,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:45:23,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:45:23,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:45:23,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:45:23,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:45:23,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:45:23,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:45:23,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:45:23,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:45:23,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:45:23,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:45:23,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:45:23,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:45:23,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:45:23,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:45:23,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:45:23,449 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ebed807-9279-4e53-8e13-3c8c4b75df61/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:45:23,509 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:45:23,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:45:23,511 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:45:23,511 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:45:23,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:45:23,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:45:23,521 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:45:23,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:45:23,521 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:45:23,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:45:23,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:45:23,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:45:23,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:45:23,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:45:23,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:45:23,524 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:45:23,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:45:23,524 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:45:23,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:45:23,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:45:23,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:45:23,526 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:45:23,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:45:23,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:45:23,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:45:23,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:45:23,527 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:45:23,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:45:23,527 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:45:23,529 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:45:23,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:45:23,530 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:45:23,530 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_7ebed807-9279-4e53-8e13-3c8c4b75df61/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ebed807-9279-4e53-8e13-3c8c4b75df61/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 417dec4be084b2867b601c43d125afd61f7d3912bd17641ca10c0f094ab6abe0 [2021-10-28 23:45:23,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:45:23,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:45:23,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:45:23,921 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:45:23,922 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:45:23,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ebed807-9279-4e53-8e13-3c8c4b75df61/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/weaver/security.wvr.c [2021-10-28 23:45:24,026 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ebed807-9279-4e53-8e13-3c8c4b75df61/bin/uautomizer-GMMbpWq8iD/data/4c8228e3e/5951511eee5f483ea5619177280af83f/FLAGb368ca100 [2021-10-28 23:45:24,704 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:45:24,705 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ebed807-9279-4e53-8e13-3c8c4b75df61/sv-benchmarks/c/weaver/security.wvr.c [2021-10-28 23:45:24,721 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ebed807-9279-4e53-8e13-3c8c4b75df61/bin/uautomizer-GMMbpWq8iD/data/4c8228e3e/5951511eee5f483ea5619177280af83f/FLAGb368ca100 [2021-10-28 23:45:25,057 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ebed807-9279-4e53-8e13-3c8c4b75df61/bin/uautomizer-GMMbpWq8iD/data/4c8228e3e/5951511eee5f483ea5619177280af83f [2021-10-28 23:45:25,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:45:25,062 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:45:25,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:45:25,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:45:25,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:45:25,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:45:25" (1/1) ... [2021-10-28 23:45:25,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ee6f26e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:25, skipping insertion in model container [2021-10-28 23:45:25,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:45:25" (1/1) ... [2021-10-28 23:45:25,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:45:25,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:45:25,361 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_7ebed807-9279-4e53-8e13-3c8c4b75df61/sv-benchmarks/c/weaver/security.wvr.c[1931,1944] [2021-10-28 23:45:25,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:45:25,377 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:45:25,402 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_7ebed807-9279-4e53-8e13-3c8c4b75df61/sv-benchmarks/c/weaver/security.wvr.c[1931,1944] [2021-10-28 23:45:25,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:45:25,421 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:45:25,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:25 WrapperNode [2021-10-28 23:45:25,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:45:25,424 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:45:25,424 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:45:25,424 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:45:25,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:25" (1/1) ... [2021-10-28 23:45:25,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:25" (1/1) ... [2021-10-28 23:45:25,467 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:45:25,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:45:25,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:45:25,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:45:25,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:25" (1/1) ... [2021-10-28 23:45:25,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:25" (1/1) ... [2021-10-28 23:45:25,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:25" (1/1) ... [2021-10-28 23:45:25,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:25" (1/1) ... [2021-10-28 23:45:25,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:25" (1/1) ... [2021-10-28 23:45:25,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:25" (1/1) ... [2021-10-28 23:45:25,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:25" (1/1) ... [2021-10-28 23:45:25,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:45:25,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:45:25,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:45:25,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:45:25,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:25" (1/1) ... [2021-10-28 23:45:25,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:45:25,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ebed807-9279-4e53-8e13-3c8c4b75df61/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:45:25,556 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ebed807-9279-4e53-8e13-3c8c4b75df61/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:45:25,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ebed807-9279-4e53-8e13-3c8c4b75df61/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:45:25,620 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-28 23:45:25,620 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-28 23:45:25,621 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-28 23:45:25,621 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-28 23:45:25,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:45:25,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:45:25,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:45:25,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:45:25,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:45:25,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 23:45:25,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:45:25,627 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-28 23:45:26,012 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:45:26,012 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-28 23:45:26,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:45:26 BoogieIcfgContainer [2021-10-28 23:45:26,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:45:26,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:45:26,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:45:26,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:45:26,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:45:25" (1/3) ... [2021-10-28 23:45:26,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec8268b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:45:26, skipping insertion in model container [2021-10-28 23:45:26,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:45:25" (2/3) ... [2021-10-28 23:45:26,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec8268b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:45:26, skipping insertion in model container [2021-10-28 23:45:26,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:45:26" (3/3) ... [2021-10-28 23:45:26,026 INFO L111 eAbstractionObserver]: Analyzing ICFG security.wvr.c [2021-10-28 23:45:26,032 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-28 23:45:26,033 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:45:26,033 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 23:45:26,033 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-28 23:45:26,069 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,070 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,070 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,071 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,071 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,072 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,072 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,072 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,073 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,074 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,074 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,074 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,076 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,076 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,076 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,077 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,077 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,078 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,078 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,079 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,079 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,080 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,080 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,081 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,084 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,090 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,090 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,104 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,105 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,105 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 23:45:26,131 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-28 23:45:26,193 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:45:26,202 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 23:45:26,202 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-28 23:45:26,219 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 79 places, 75 transitions, 166 flow [2021-10-28 23:45:26,272 INFO L129 PetriNetUnfolder]: 3/73 cut-off events. [2021-10-28 23:45:26,272 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-28 23:45:26,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 3/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2021-10-28 23:45:26,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 75 transitions, 166 flow [2021-10-28 23:45:26,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 65 transitions, 142 flow [2021-10-28 23:45:26,315 INFO L129 PetriNetUnfolder]: 3/64 cut-off events. [2021-10-28 23:45:26,322 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-28 23:45:26,323 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:26,324 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:26,325 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:26,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:26,335 INFO L85 PathProgramCache]: Analyzing trace with hash 928103298, now seen corresponding path program 1 times [2021-10-28 23:45:26,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:26,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230787163] [2021-10-28 23:45:26,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:26,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:27,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:27,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230787163] [2021-10-28 23:45:27,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230787163] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:27,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:27,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 23:45:27,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197946949] [2021-10-28 23:45:27,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:45:27,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:27,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:45:27,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:45:27,209 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 75 [2021-10-28 23:45:27,225 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 142 flow. Second operand has 8 states, 8 states have (on average 57.75) internal successors, (462), 8 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:27,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:27,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 75 [2021-10-28 23:45:27,233 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:27,539 INFO L129 PetriNetUnfolder]: 12/120 cut-off events. [2021-10-28 23:45:27,539 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-10-28 23:45:27,540 INFO L84 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 120 events. 12/120 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 287 event pairs, 4 based on Foata normal form. 3/115 useless extension candidates. Maximal degree in co-relation 99. Up to 26 conditions per place. [2021-10-28 23:45:27,543 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 24 selfloop transitions, 2 changer transitions 8/81 dead transitions. [2021-10-28 23:45:27,543 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 81 transitions, 242 flow [2021-10-28 23:45:27,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:45:27,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 23:45:27,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 598 transitions. [2021-10-28 23:45:27,565 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7973333333333333 [2021-10-28 23:45:27,566 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 598 transitions. [2021-10-28 23:45:27,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 598 transitions. [2021-10-28 23:45:27,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:27,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 598 transitions. [2021-10-28 23:45:27,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.8) internal successors, (598), 10 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:27,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:27,598 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:27,600 INFO L186 Difference]: Start difference. First operand has 69 places, 65 transitions, 142 flow. Second operand 10 states and 598 transitions. [2021-10-28 23:45:27,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 81 transitions, 242 flow [2021-10-28 23:45:27,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 81 transitions, 234 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-10-28 23:45:27,622 INFO L242 Difference]: Finished difference. Result has 80 places, 64 transitions, 151 flow [2021-10-28 23:45:27,638 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=151, PETRI_PLACES=80, PETRI_TRANSITIONS=64} [2021-10-28 23:45:27,638 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 11 predicate places. [2021-10-28 23:45:27,639 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 64 transitions, 151 flow [2021-10-28 23:45:27,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.75) internal successors, (462), 8 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:27,640 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:27,640 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:27,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:45:27,641 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:27,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:27,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1363361579, now seen corresponding path program 1 times [2021-10-28 23:45:27,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:27,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587531370] [2021-10-28 23:45:27,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:27,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:28,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:28,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587531370] [2021-10-28 23:45:28,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587531370] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:28,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:28,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 23:45:28,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50898824] [2021-10-28 23:45:28,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:45:28,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:28,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:45:28,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:45:28,090 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 23:45:28,092 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 64 transitions, 151 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:28,092 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:28,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 23:45:28,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:28,378 INFO L129 PetriNetUnfolder]: 13/171 cut-off events. [2021-10-28 23:45:28,378 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-10-28 23:45:28,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 171 events. 13/171 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 644 event pairs, 0 based on Foata normal form. 2/166 useless extension candidates. Maximal degree in co-relation 275. Up to 28 conditions per place. [2021-10-28 23:45:28,381 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 27 selfloop transitions, 5 changer transitions 5/82 dead transitions. [2021-10-28 23:45:28,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 82 transitions, 293 flow [2021-10-28 23:45:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:45:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 23:45:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 521 transitions. [2021-10-28 23:45:28,388 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7718518518518519 [2021-10-28 23:45:28,389 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 521 transitions. [2021-10-28 23:45:28,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 521 transitions. [2021-10-28 23:45:28,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:28,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 521 transitions. [2021-10-28 23:45:28,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.888888888888886) internal successors, (521), 9 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:28,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:28,399 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:28,399 INFO L186 Difference]: Start difference. First operand has 80 places, 64 transitions, 151 flow. Second operand 9 states and 521 transitions. [2021-10-28 23:45:28,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 82 transitions, 293 flow [2021-10-28 23:45:28,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 82 transitions, 268 flow, removed 12 selfloop flow, removed 5 redundant places. [2021-10-28 23:45:28,405 INFO L242 Difference]: Finished difference. Result has 82 places, 66 transitions, 178 flow [2021-10-28 23:45:28,406 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=178, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2021-10-28 23:45:28,406 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 13 predicate places. [2021-10-28 23:45:28,407 INFO L470 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 178 flow [2021-10-28 23:45:28,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:28,408 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:28,408 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:28,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:45:28,409 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:28,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:28,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1211883793, now seen corresponding path program 2 times [2021-10-28 23:45:28,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:28,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581298091] [2021-10-28 23:45:28,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:28,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:28,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:28,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581298091] [2021-10-28 23:45:28,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581298091] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:28,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:28,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 23:45:28,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442671164] [2021-10-28 23:45:28,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:45:28,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:28,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:45:28,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:45:28,718 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 23:45:28,719 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 178 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:28,720 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:28,720 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 23:45:28,720 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:29,089 INFO L129 PetriNetUnfolder]: 15/260 cut-off events. [2021-10-28 23:45:29,090 INFO L130 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2021-10-28 23:45:29,091 INFO L84 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 260 events. 15/260 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1451 event pairs, 10 based on Foata normal form. 3/255 useless extension candidates. Maximal degree in co-relation 455. Up to 43 conditions per place. [2021-10-28 23:45:29,093 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 30 selfloop transitions, 4 changer transitions 13/92 dead transitions. [2021-10-28 23:45:29,105 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 92 transitions, 404 flow [2021-10-28 23:45:29,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:45:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-28 23:45:29,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 745 transitions. [2021-10-28 23:45:29,111 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.764102564102564 [2021-10-28 23:45:29,111 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 745 transitions. [2021-10-28 23:45:29,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 745 transitions. [2021-10-28 23:45:29,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:29,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 745 transitions. [2021-10-28 23:45:29,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 57.30769230769231) internal successors, (745), 13 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:29,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 75.0) internal successors, (1050), 14 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:29,123 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 75.0) internal successors, (1050), 14 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:29,123 INFO L186 Difference]: Start difference. First operand has 82 places, 66 transitions, 178 flow. Second operand 13 states and 745 transitions. [2021-10-28 23:45:29,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 92 transitions, 404 flow [2021-10-28 23:45:29,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 92 transitions, 370 flow, removed 10 selfloop flow, removed 5 redundant places. [2021-10-28 23:45:29,132 INFO L242 Difference]: Finished difference. Result has 97 places, 67 transitions, 214 flow [2021-10-28 23:45:29,133 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=214, PETRI_PLACES=97, PETRI_TRANSITIONS=67} [2021-10-28 23:45:29,133 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 28 predicate places. [2021-10-28 23:45:29,134 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 67 transitions, 214 flow [2021-10-28 23:45:29,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:29,135 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:29,135 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:29,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:45:29,136 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:29,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:29,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1708637851, now seen corresponding path program 3 times [2021-10-28 23:45:29,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:29,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16313840] [2021-10-28 23:45:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:29,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:29,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:29,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16313840] [2021-10-28 23:45:29,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16313840] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:29,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:29,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 23:45:29,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736139867] [2021-10-28 23:45:29,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:45:29,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:29,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:45:29,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:45:29,385 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 23:45:29,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 67 transitions, 214 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:29,391 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:29,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 23:45:29,391 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:29,852 INFO L129 PetriNetUnfolder]: 14/296 cut-off events. [2021-10-28 23:45:29,852 INFO L130 PetriNetUnfolder]: For 372/374 co-relation queries the response was YES. [2021-10-28 23:45:29,858 INFO L84 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 296 events. 14/296 cut-off events. For 372/374 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1781 event pairs, 12 based on Foata normal form. 3/292 useless extension candidates. Maximal degree in co-relation 611. Up to 43 conditions per place. [2021-10-28 23:45:29,861 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 38 selfloop transitions, 9 changer transitions 8/100 dead transitions. [2021-10-28 23:45:29,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 100 transitions, 540 flow [2021-10-28 23:45:29,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:45:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-28 23:45:29,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 808 transitions. [2021-10-28 23:45:29,877 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7695238095238095 [2021-10-28 23:45:29,879 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 808 transitions. [2021-10-28 23:45:29,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 808 transitions. [2021-10-28 23:45:29,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:29,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 808 transitions. [2021-10-28 23:45:29,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.714285714285715) internal successors, (808), 14 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:29,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:29,891 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:29,891 INFO L186 Difference]: Start difference. First operand has 97 places, 67 transitions, 214 flow. Second operand 14 states and 808 transitions. [2021-10-28 23:45:29,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 100 transitions, 540 flow [2021-10-28 23:45:29,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 100 transitions, 438 flow, removed 50 selfloop flow, removed 10 redundant places. [2021-10-28 23:45:29,912 INFO L242 Difference]: Finished difference. Result has 103 places, 74 transitions, 296 flow [2021-10-28 23:45:29,913 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=296, PETRI_PLACES=103, PETRI_TRANSITIONS=74} [2021-10-28 23:45:29,913 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 34 predicate places. [2021-10-28 23:45:29,914 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 74 transitions, 296 flow [2021-10-28 23:45:29,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:29,914 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:29,915 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:29,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:45:29,915 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:29,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:29,916 INFO L85 PathProgramCache]: Analyzing trace with hash -567228287, now seen corresponding path program 4 times [2021-10-28 23:45:29,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:29,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815391423] [2021-10-28 23:45:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:29,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:30,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:30,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815391423] [2021-10-28 23:45:30,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815391423] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:30,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:30,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 23:45:30,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256800545] [2021-10-28 23:45:30,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:45:30,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:30,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:45:30,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:45:30,198 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 23:45:30,199 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 74 transitions, 296 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:30,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:30,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 23:45:30,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:30,439 INFO L129 PetriNetUnfolder]: 12/279 cut-off events. [2021-10-28 23:45:30,439 INFO L130 PetriNetUnfolder]: For 408/415 co-relation queries the response was YES. [2021-10-28 23:45:30,440 INFO L84 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 279 events. 12/279 cut-off events. For 408/415 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1657 event pairs, 1 based on Foata normal form. 2/271 useless extension candidates. Maximal degree in co-relation 605. Up to 52 conditions per place. [2021-10-28 23:45:30,442 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 42 selfloop transitions, 6 changer transitions 8/101 dead transitions. [2021-10-28 23:45:30,442 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 101 transitions, 589 flow [2021-10-28 23:45:30,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:45:30,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 23:45:30,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2021-10-28 23:45:30,446 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7851851851851852 [2021-10-28 23:45:30,446 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2021-10-28 23:45:30,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2021-10-28 23:45:30,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:30,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2021-10-28 23:45:30,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:30,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:30,452 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:30,452 INFO L186 Difference]: Start difference. First operand has 103 places, 74 transitions, 296 flow. Second operand 9 states and 530 transitions. [2021-10-28 23:45:30,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 101 transitions, 589 flow [2021-10-28 23:45:30,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 101 transitions, 525 flow, removed 32 selfloop flow, removed 6 redundant places. [2021-10-28 23:45:30,462 INFO L242 Difference]: Finished difference. Result has 106 places, 75 transitions, 321 flow [2021-10-28 23:45:30,462 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=321, PETRI_PLACES=106, PETRI_TRANSITIONS=75} [2021-10-28 23:45:30,462 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 37 predicate places. [2021-10-28 23:45:30,463 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 75 transitions, 321 flow [2021-10-28 23:45:30,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:30,464 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:30,464 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:30,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 23:45:30,464 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:30,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:30,465 INFO L85 PathProgramCache]: Analyzing trace with hash -623879787, now seen corresponding path program 5 times [2021-10-28 23:45:30,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:30,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309996143] [2021-10-28 23:45:30,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:30,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:30,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:30,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309996143] [2021-10-28 23:45:30,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309996143] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:30,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:30,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 23:45:30,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650103996] [2021-10-28 23:45:30,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:45:30,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:30,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:45:30,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:45:30,672 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 23:45:30,673 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 75 transitions, 321 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:30,673 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:30,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 23:45:30,674 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:30,880 INFO L129 PetriNetUnfolder]: 11/266 cut-off events. [2021-10-28 23:45:30,881 INFO L130 PetriNetUnfolder]: For 513/530 co-relation queries the response was YES. [2021-10-28 23:45:30,882 INFO L84 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 266 events. 11/266 cut-off events. For 513/530 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1523 event pairs, 10 based on Foata normal form. 4/263 useless extension candidates. Maximal degree in co-relation 576. Up to 43 conditions per place. [2021-10-28 23:45:30,884 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 34 selfloop transitions, 5 changer transitions 8/92 dead transitions. [2021-10-28 23:45:30,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 92 transitions, 521 flow [2021-10-28 23:45:30,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:45:30,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 23:45:30,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 526 transitions. [2021-10-28 23:45:30,888 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7792592592592592 [2021-10-28 23:45:30,888 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 526 transitions. [2021-10-28 23:45:30,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 526 transitions. [2021-10-28 23:45:30,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:30,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 526 transitions. [2021-10-28 23:45:30,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.44444444444444) internal successors, (526), 9 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:30,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:30,894 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:30,895 INFO L186 Difference]: Start difference. First operand has 106 places, 75 transitions, 321 flow. Second operand 9 states and 526 transitions. [2021-10-28 23:45:30,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 92 transitions, 521 flow [2021-10-28 23:45:30,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 92 transitions, 479 flow, removed 20 selfloop flow, removed 6 redundant places. [2021-10-28 23:45:30,903 INFO L242 Difference]: Finished difference. Result has 108 places, 73 transitions, 300 flow [2021-10-28 23:45:30,903 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=300, PETRI_PLACES=108, PETRI_TRANSITIONS=73} [2021-10-28 23:45:30,904 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 39 predicate places. [2021-10-28 23:45:30,904 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 73 transitions, 300 flow [2021-10-28 23:45:30,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:30,905 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:30,905 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:30,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 23:45:30,906 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:30,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:30,906 INFO L85 PathProgramCache]: Analyzing trace with hash -95163099, now seen corresponding path program 6 times [2021-10-28 23:45:30,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:30,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292624645] [2021-10-28 23:45:30,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:30,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:31,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:31,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292624645] [2021-10-28 23:45:31,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292624645] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:31,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:31,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 23:45:31,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720105162] [2021-10-28 23:45:31,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:45:31,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:31,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:45:31,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:45:31,089 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 23:45:31,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 73 transitions, 300 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:31,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:31,091 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 23:45:31,091 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:31,308 INFO L129 PetriNetUnfolder]: 11/232 cut-off events. [2021-10-28 23:45:31,308 INFO L130 PetriNetUnfolder]: For 427/445 co-relation queries the response was YES. [2021-10-28 23:45:31,310 INFO L84 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 232 events. 11/232 cut-off events. For 427/445 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1208 event pairs, 10 based on Foata normal form. 3/229 useless extension candidates. Maximal degree in co-relation 498. Up to 43 conditions per place. [2021-10-28 23:45:31,311 INFO L132 encePairwiseOnDemand]: 67/75 looper letters, 28 selfloop transitions, 2 changer transitions 10/85 dead transitions. [2021-10-28 23:45:31,311 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 85 transitions, 459 flow [2021-10-28 23:45:31,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:45:31,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 23:45:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 521 transitions. [2021-10-28 23:45:31,315 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7718518518518519 [2021-10-28 23:45:31,315 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 521 transitions. [2021-10-28 23:45:31,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 521 transitions. [2021-10-28 23:45:31,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:31,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 521 transitions. [2021-10-28 23:45:31,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.888888888888886) internal successors, (521), 9 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:31,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:31,322 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:31,322 INFO L186 Difference]: Start difference. First operand has 108 places, 73 transitions, 300 flow. Second operand 9 states and 521 transitions. [2021-10-28 23:45:31,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 85 transitions, 459 flow [2021-10-28 23:45:31,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 85 transitions, 415 flow, removed 16 selfloop flow, removed 8 redundant places. [2021-10-28 23:45:31,329 INFO L242 Difference]: Finished difference. Result has 108 places, 69 transitions, 250 flow [2021-10-28 23:45:31,330 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=250, PETRI_PLACES=108, PETRI_TRANSITIONS=69} [2021-10-28 23:45:31,330 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 39 predicate places. [2021-10-28 23:45:31,331 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 69 transitions, 250 flow [2021-10-28 23:45:31,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:31,331 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:31,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:31,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 23:45:31,332 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:31,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:31,333 INFO L85 PathProgramCache]: Analyzing trace with hash -607430529, now seen corresponding path program 7 times [2021-10-28 23:45:31,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:31,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357835877] [2021-10-28 23:45:31,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:31,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:31,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:31,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357835877] [2021-10-28 23:45:31,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357835877] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:31,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:31,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 23:45:31,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106063594] [2021-10-28 23:45:31,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:45:31,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:31,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:45:31,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:45:31,612 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 23:45:31,613 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 69 transitions, 250 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:31,613 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:31,613 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 23:45:31,613 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:31,809 INFO L129 PetriNetUnfolder]: 11/192 cut-off events. [2021-10-28 23:45:31,809 INFO L130 PetriNetUnfolder]: For 280/280 co-relation queries the response was YES. [2021-10-28 23:45:31,810 INFO L84 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 192 events. 11/192 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 830 event pairs, 0 based on Foata normal form. 1/186 useless extension candidates. Maximal degree in co-relation 404. Up to 33 conditions per place. [2021-10-28 23:45:31,811 INFO L132 encePairwiseOnDemand]: 67/75 looper letters, 26 selfloop transitions, 5 changer transitions 6/82 dead transitions. [2021-10-28 23:45:31,812 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 82 transitions, 390 flow [2021-10-28 23:45:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:45:31,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 23:45:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 519 transitions. [2021-10-28 23:45:31,815 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7688888888888888 [2021-10-28 23:45:31,816 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 519 transitions. [2021-10-28 23:45:31,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 519 transitions. [2021-10-28 23:45:31,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:31,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 519 transitions. [2021-10-28 23:45:31,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:31,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:31,824 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:31,824 INFO L186 Difference]: Start difference. First operand has 108 places, 69 transitions, 250 flow. Second operand 9 states and 519 transitions. [2021-10-28 23:45:31,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 82 transitions, 390 flow [2021-10-28 23:45:31,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 82 transitions, 351 flow, removed 16 selfloop flow, removed 10 redundant places. [2021-10-28 23:45:31,830 INFO L242 Difference]: Finished difference. Result has 101 places, 68 transitions, 237 flow [2021-10-28 23:45:31,830 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=237, PETRI_PLACES=101, PETRI_TRANSITIONS=68} [2021-10-28 23:45:31,831 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 32 predicate places. [2021-10-28 23:45:31,831 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 68 transitions, 237 flow [2021-10-28 23:45:31,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:31,832 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:31,832 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:31,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 23:45:31,833 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:31,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:31,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1515168241, now seen corresponding path program 8 times [2021-10-28 23:45:31,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:31,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386049227] [2021-10-28 23:45:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:31,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:32,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:32,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386049227] [2021-10-28 23:45:32,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386049227] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:32,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:32,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 23:45:32,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520635494] [2021-10-28 23:45:32,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:45:32,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:32,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:45:32,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:45:32,065 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 23:45:32,067 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 68 transitions, 237 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:32,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:32,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 23:45:32,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:32,251 INFO L129 PetriNetUnfolder]: 11/175 cut-off events. [2021-10-28 23:45:32,251 INFO L130 PetriNetUnfolder]: For 237/237 co-relation queries the response was YES. [2021-10-28 23:45:32,252 INFO L84 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 175 events. 11/175 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 692 event pairs, 0 based on Foata normal form. 1/169 useless extension candidates. Maximal degree in co-relation 369. Up to 33 conditions per place. [2021-10-28 23:45:32,253 INFO L132 encePairwiseOnDemand]: 67/75 looper letters, 26 selfloop transitions, 2 changer transitions 8/81 dead transitions. [2021-10-28 23:45:32,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 81 transitions, 380 flow [2021-10-28 23:45:32,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:45:32,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 23:45:32,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 520 transitions. [2021-10-28 23:45:32,257 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2021-10-28 23:45:32,257 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 520 transitions. [2021-10-28 23:45:32,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 520 transitions. [2021-10-28 23:45:32,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:32,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 520 transitions. [2021-10-28 23:45:32,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.77777777777778) internal successors, (520), 9 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:32,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:32,263 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:32,263 INFO L186 Difference]: Start difference. First operand has 101 places, 68 transitions, 237 flow. Second operand 9 states and 520 transitions. [2021-10-28 23:45:32,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 81 transitions, 380 flow [2021-10-28 23:45:32,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 81 transitions, 329 flow, removed 13 selfloop flow, removed 12 redundant places. [2021-10-28 23:45:32,269 INFO L242 Difference]: Finished difference. Result has 97 places, 65 transitions, 189 flow [2021-10-28 23:45:32,269 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=189, PETRI_PLACES=97, PETRI_TRANSITIONS=65} [2021-10-28 23:45:32,269 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 28 predicate places. [2021-10-28 23:45:32,270 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 65 transitions, 189 flow [2021-10-28 23:45:32,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:32,271 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:32,271 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:32,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 23:45:32,271 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:32,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1185092991, now seen corresponding path program 9 times [2021-10-28 23:45:32,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:32,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561518449] [2021-10-28 23:45:32,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:32,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:32,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:32,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561518449] [2021-10-28 23:45:32,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561518449] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:32,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:32,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 23:45:32,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195646553] [2021-10-28 23:45:32,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:45:32,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:32,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:45:32,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:45:32,440 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 23:45:32,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 65 transitions, 189 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:32,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:32,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 23:45:32,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:32,645 INFO L129 PetriNetUnfolder]: 10/166 cut-off events. [2021-10-28 23:45:32,645 INFO L130 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2021-10-28 23:45:32,646 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 166 events. 10/166 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 623 event pairs, 0 based on Foata normal form. 1/160 useless extension candidates. Maximal degree in co-relation 325. Up to 30 conditions per place. [2021-10-28 23:45:32,647 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 21 selfloop transitions, 5 changer transitions 6/77 dead transitions. [2021-10-28 23:45:32,647 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 77 transitions, 313 flow [2021-10-28 23:45:32,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:45:32,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 23:45:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 516 transitions. [2021-10-28 23:45:32,651 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7644444444444445 [2021-10-28 23:45:32,651 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 516 transitions. [2021-10-28 23:45:32,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 516 transitions. [2021-10-28 23:45:32,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:32,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 516 transitions. [2021-10-28 23:45:32,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.333333333333336) internal successors, (516), 9 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:32,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:32,657 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:32,657 INFO L186 Difference]: Start difference. First operand has 97 places, 65 transitions, 189 flow. Second operand 9 states and 516 transitions. [2021-10-28 23:45:32,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 77 transitions, 313 flow [2021-10-28 23:45:32,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 77 transitions, 280 flow, removed 9 selfloop flow, removed 11 redundant places. [2021-10-28 23:45:32,662 INFO L242 Difference]: Finished difference. Result has 92 places, 65 transitions, 187 flow [2021-10-28 23:45:32,662 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=187, PETRI_PLACES=92, PETRI_TRANSITIONS=65} [2021-10-28 23:45:32,662 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 23 predicate places. [2021-10-28 23:45:32,663 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 65 transitions, 187 flow [2021-10-28 23:45:32,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:32,663 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:32,664 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:32,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 23:45:32,664 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:32,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:32,665 INFO L85 PathProgramCache]: Analyzing trace with hash 678766821, now seen corresponding path program 10 times [2021-10-28 23:45:32,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:32,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855936385] [2021-10-28 23:45:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:32,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:32,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:32,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855936385] [2021-10-28 23:45:32,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855936385] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:32,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:32,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 23:45:32,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497355013] [2021-10-28 23:45:32,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:45:32,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:32,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:45:32,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:45:32,839 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 23:45:32,840 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 65 transitions, 187 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:32,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:32,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 23:45:32,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:33,037 INFO L129 PetriNetUnfolder]: 10/150 cut-off events. [2021-10-28 23:45:33,038 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2021-10-28 23:45:33,038 INFO L84 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 150 events. 10/150 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 511 event pairs, 0 based on Foata normal form. 2/145 useless extension candidates. Maximal degree in co-relation 296. Up to 28 conditions per place. [2021-10-28 23:45:33,039 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 19 selfloop transitions, 3 changer transitions 10/75 dead transitions. [2021-10-28 23:45:33,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 75 transitions, 299 flow [2021-10-28 23:45:33,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:45:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 23:45:33,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 515 transitions. [2021-10-28 23:45:33,043 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.762962962962963 [2021-10-28 23:45:33,043 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 515 transitions. [2021-10-28 23:45:33,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 515 transitions. [2021-10-28 23:45:33,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:33,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 515 transitions. [2021-10-28 23:45:33,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.22222222222222) internal successors, (515), 9 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:33,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:33,050 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:33,050 INFO L186 Difference]: Start difference. First operand has 92 places, 65 transitions, 187 flow. Second operand 9 states and 515 transitions. [2021-10-28 23:45:33,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 75 transitions, 299 flow [2021-10-28 23:45:33,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 75 transitions, 271 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-10-28 23:45:33,054 INFO L242 Difference]: Finished difference. Result has 92 places, 61 transitions, 161 flow [2021-10-28 23:45:33,054 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=161, PETRI_PLACES=92, PETRI_TRANSITIONS=61} [2021-10-28 23:45:33,055 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 23 predicate places. [2021-10-28 23:45:33,055 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 61 transitions, 161 flow [2021-10-28 23:45:33,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:33,056 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:33,056 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:33,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 23:45:33,056 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:33,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:33,057 INFO L85 PathProgramCache]: Analyzing trace with hash -436103984, now seen corresponding path program 1 times [2021-10-28 23:45:33,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:33,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618094863] [2021-10-28 23:45:33,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:33,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:33,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:33,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618094863] [2021-10-28 23:45:33,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618094863] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:33,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:33,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:33,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145431581] [2021-10-28 23:45:33,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:33,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:33,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:33,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:33,269 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:33,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 61 transitions, 161 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:33,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:33,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:33,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:33,609 INFO L129 PetriNetUnfolder]: 13/165 cut-off events. [2021-10-28 23:45:33,610 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2021-10-28 23:45:33,610 INFO L84 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 165 events. 13/165 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 627 event pairs, 0 based on Foata normal form. 3/165 useless extension candidates. Maximal degree in co-relation 324. Up to 17 conditions per place. [2021-10-28 23:45:33,611 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 30 selfloop transitions, 3 changer transitions 13/87 dead transitions. [2021-10-28 23:45:33,612 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 87 transitions, 428 flow [2021-10-28 23:45:33,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:45:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-28 23:45:33,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 771 transitions. [2021-10-28 23:45:33,615 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7342857142857143 [2021-10-28 23:45:33,615 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 771 transitions. [2021-10-28 23:45:33,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 771 transitions. [2021-10-28 23:45:33,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:33,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 771 transitions. [2021-10-28 23:45:33,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 55.07142857142857) internal successors, (771), 14 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:33,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:33,623 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:33,624 INFO L186 Difference]: Start difference. First operand has 92 places, 61 transitions, 161 flow. Second operand 14 states and 771 transitions. [2021-10-28 23:45:33,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 87 transitions, 428 flow [2021-10-28 23:45:33,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 339 flow, removed 30 selfloop flow, removed 9 redundant places. [2021-10-28 23:45:33,628 INFO L242 Difference]: Finished difference. Result has 91 places, 61 transitions, 172 flow [2021-10-28 23:45:33,628 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=172, PETRI_PLACES=91, PETRI_TRANSITIONS=61} [2021-10-28 23:45:33,629 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 22 predicate places. [2021-10-28 23:45:33,629 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 61 transitions, 172 flow [2021-10-28 23:45:33,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:33,630 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:33,630 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:33,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 23:45:33,631 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:33,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:33,631 INFO L85 PathProgramCache]: Analyzing trace with hash -693633984, now seen corresponding path program 2 times [2021-10-28 23:45:33,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:33,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819026808] [2021-10-28 23:45:33,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:33,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:33,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:33,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819026808] [2021-10-28 23:45:33,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819026808] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:33,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:33,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:33,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522811598] [2021-10-28 23:45:33,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:33,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:33,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:33,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:33,858 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:33,859 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 61 transitions, 172 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:33,860 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:33,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:33,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:34,102 INFO L129 PetriNetUnfolder]: 11/156 cut-off events. [2021-10-28 23:45:34,103 INFO L130 PetriNetUnfolder]: For 86/88 co-relation queries the response was YES. [2021-10-28 23:45:34,104 INFO L84 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 156 events. 11/156 cut-off events. For 86/88 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 537 event pairs, 0 based on Foata normal form. 2/152 useless extension candidates. Maximal degree in co-relation 314. Up to 20 conditions per place. [2021-10-28 23:45:34,105 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 22 selfloop transitions, 5 changer transitions 7/75 dead transitions. [2021-10-28 23:45:34,105 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 75 transitions, 302 flow [2021-10-28 23:45:34,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:45:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 23:45:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 554 transitions. [2021-10-28 23:45:34,108 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7386666666666667 [2021-10-28 23:45:34,108 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 554 transitions. [2021-10-28 23:45:34,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 554 transitions. [2021-10-28 23:45:34,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:34,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 554 transitions. [2021-10-28 23:45:34,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.4) internal successors, (554), 10 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:34,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:34,117 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:34,117 INFO L186 Difference]: Start difference. First operand has 91 places, 61 transitions, 172 flow. Second operand 10 states and 554 transitions. [2021-10-28 23:45:34,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 75 transitions, 302 flow [2021-10-28 23:45:34,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 249 flow, removed 15 selfloop flow, removed 12 redundant places. [2021-10-28 23:45:34,122 INFO L242 Difference]: Finished difference. Result has 85 places, 61 transitions, 169 flow [2021-10-28 23:45:34,122 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=169, PETRI_PLACES=85, PETRI_TRANSITIONS=61} [2021-10-28 23:45:34,122 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 16 predicate places. [2021-10-28 23:45:34,123 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 61 transitions, 169 flow [2021-10-28 23:45:34,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:34,123 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:34,124 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:34,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 23:45:34,124 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:34,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:34,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1829380162, now seen corresponding path program 3 times [2021-10-28 23:45:34,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:34,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974494251] [2021-10-28 23:45:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:34,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:34,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:34,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974494251] [2021-10-28 23:45:34,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974494251] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:34,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:34,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:34,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482293339] [2021-10-28 23:45:34,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:34,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:34,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:34,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:34,337 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:34,338 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 61 transitions, 169 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:34,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:34,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:34,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:34,594 INFO L129 PetriNetUnfolder]: 12/198 cut-off events. [2021-10-28 23:45:34,595 INFO L130 PetriNetUnfolder]: For 120/122 co-relation queries the response was YES. [2021-10-28 23:45:34,596 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 198 events. 12/198 cut-off events. For 120/122 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 851 event pairs, 0 based on Foata normal form. 2/196 useless extension candidates. Maximal degree in co-relation 393. Up to 27 conditions per place. [2021-10-28 23:45:34,598 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 35 selfloop transitions, 4 changer transitions 7/87 dead transitions. [2021-10-28 23:45:34,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 87 transitions, 433 flow [2021-10-28 23:45:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:45:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 23:45:34,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 562 transitions. [2021-10-28 23:45:34,600 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7493333333333333 [2021-10-28 23:45:34,601 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 562 transitions. [2021-10-28 23:45:34,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 562 transitions. [2021-10-28 23:45:34,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:34,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 562 transitions. [2021-10-28 23:45:34,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:34,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:34,606 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:34,606 INFO L186 Difference]: Start difference. First operand has 85 places, 61 transitions, 169 flow. Second operand 10 states and 562 transitions. [2021-10-28 23:45:34,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 87 transitions, 433 flow [2021-10-28 23:45:34,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 376 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-10-28 23:45:34,612 INFO L242 Difference]: Finished difference. Result has 88 places, 63 transitions, 186 flow [2021-10-28 23:45:34,612 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=186, PETRI_PLACES=88, PETRI_TRANSITIONS=63} [2021-10-28 23:45:34,612 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 19 predicate places. [2021-10-28 23:45:34,613 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 63 transitions, 186 flow [2021-10-28 23:45:34,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:34,613 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:34,614 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:34,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 23:45:34,614 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:34,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:34,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1575729550, now seen corresponding path program 4 times [2021-10-28 23:45:34,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:34,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717206797] [2021-10-28 23:45:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:34,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:34,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:34,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717206797] [2021-10-28 23:45:34,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717206797] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:34,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:34,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:34,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970815548] [2021-10-28 23:45:34,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:34,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:34,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:34,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:34,827 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:34,829 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 63 transitions, 186 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:34,829 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:34,829 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:34,829 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:35,091 INFO L129 PetriNetUnfolder]: 12/259 cut-off events. [2021-10-28 23:45:35,092 INFO L130 PetriNetUnfolder]: For 170/178 co-relation queries the response was YES. [2021-10-28 23:45:35,093 INFO L84 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 259 events. 12/259 cut-off events. For 170/178 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1388 event pairs, 3 based on Foata normal form. 2/257 useless extension candidates. Maximal degree in co-relation 525. Up to 49 conditions per place. [2021-10-28 23:45:35,094 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 29 selfloop transitions, 7 changer transitions 7/84 dead transitions. [2021-10-28 23:45:35,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 84 transitions, 383 flow [2021-10-28 23:45:35,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:45:35,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 23:45:35,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 559 transitions. [2021-10-28 23:45:35,097 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7453333333333333 [2021-10-28 23:45:35,097 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 559 transitions. [2021-10-28 23:45:35,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 559 transitions. [2021-10-28 23:45:35,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:35,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 559 transitions. [2021-10-28 23:45:35,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.9) internal successors, (559), 10 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:35,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:35,108 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:35,108 INFO L186 Difference]: Start difference. First operand has 88 places, 63 transitions, 186 flow. Second operand 10 states and 559 transitions. [2021-10-28 23:45:35,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 84 transitions, 383 flow [2021-10-28 23:45:35,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 84 transitions, 352 flow, removed 10 selfloop flow, removed 6 redundant places. [2021-10-28 23:45:35,113 INFO L242 Difference]: Finished difference. Result has 94 places, 66 transitions, 232 flow [2021-10-28 23:45:35,114 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=232, PETRI_PLACES=94, PETRI_TRANSITIONS=66} [2021-10-28 23:45:35,114 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 25 predicate places. [2021-10-28 23:45:35,114 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 66 transitions, 232 flow [2021-10-28 23:45:35,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:35,115 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:35,115 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:35,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 23:45:35,116 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:35,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:35,116 INFO L85 PathProgramCache]: Analyzing trace with hash -2058148696, now seen corresponding path program 5 times [2021-10-28 23:45:35,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:35,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274075029] [2021-10-28 23:45:35,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:35,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:35,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:35,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274075029] [2021-10-28 23:45:35,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274075029] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:35,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:35,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:35,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147171347] [2021-10-28 23:45:35,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:35,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:35,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:35,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:35,328 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:35,329 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 66 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:35,329 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:35,329 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:35,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:35,718 INFO L129 PetriNetUnfolder]: 9/283 cut-off events. [2021-10-28 23:45:35,718 INFO L130 PetriNetUnfolder]: For 306/316 co-relation queries the response was YES. [2021-10-28 23:45:35,719 INFO L84 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 283 events. 9/283 cut-off events. For 306/316 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1615 event pairs, 2 based on Foata normal form. 6/286 useless extension candidates. Maximal degree in co-relation 614. Up to 44 conditions per place. [2021-10-28 23:45:35,721 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 36 selfloop transitions, 10 changer transitions 13/100 dead transitions. [2021-10-28 23:45:35,721 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 100 transitions, 588 flow [2021-10-28 23:45:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:45:35,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-28 23:45:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 832 transitions. [2021-10-28 23:45:35,734 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7395555555555555 [2021-10-28 23:45:35,734 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 832 transitions. [2021-10-28 23:45:35,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 832 transitions. [2021-10-28 23:45:35,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:35,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 832 transitions. [2021-10-28 23:45:35,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 55.46666666666667) internal successors, (832), 15 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:35,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 75.0) internal successors, (1200), 16 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:35,743 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 75.0) internal successors, (1200), 16 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:35,745 INFO L186 Difference]: Start difference. First operand has 94 places, 66 transitions, 232 flow. Second operand 15 states and 832 transitions. [2021-10-28 23:45:35,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 100 transitions, 588 flow [2021-10-28 23:45:35,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 100 transitions, 542 flow, removed 16 selfloop flow, removed 6 redundant places. [2021-10-28 23:45:35,751 INFO L242 Difference]: Finished difference. Result has 110 places, 72 transitions, 338 flow [2021-10-28 23:45:35,751 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=338, PETRI_PLACES=110, PETRI_TRANSITIONS=72} [2021-10-28 23:45:35,751 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 41 predicate places. [2021-10-28 23:45:35,751 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 72 transitions, 338 flow [2021-10-28 23:45:35,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:35,752 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:35,752 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:35,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 23:45:35,753 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:35,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:35,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1161562930, now seen corresponding path program 6 times [2021-10-28 23:45:35,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:35,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355643363] [2021-10-28 23:45:35,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:35,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:35,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:35,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355643363] [2021-10-28 23:45:35,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355643363] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:35,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:35,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:35,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199748054] [2021-10-28 23:45:35,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:35,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:35,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:35,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:35,970 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:35,971 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 72 transitions, 338 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:35,971 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:35,971 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:35,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:36,399 INFO L129 PetriNetUnfolder]: 11/354 cut-off events. [2021-10-28 23:45:36,400 INFO L130 PetriNetUnfolder]: For 692/706 co-relation queries the response was YES. [2021-10-28 23:45:36,401 INFO L84 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 354 events. 11/354 cut-off events. For 692/706 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2330 event pairs, 6 based on Foata normal form. 4/355 useless extension candidates. Maximal degree in co-relation 908. Up to 42 conditions per place. [2021-10-28 23:45:36,403 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 38 selfloop transitions, 18 changer transitions 13/110 dead transitions. [2021-10-28 23:45:36,403 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 110 transitions, 787 flow [2021-10-28 23:45:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:45:36,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-28 23:45:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 887 transitions. [2021-10-28 23:45:36,406 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7391666666666666 [2021-10-28 23:45:36,407 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 887 transitions. [2021-10-28 23:45:36,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 887 transitions. [2021-10-28 23:45:36,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:36,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 887 transitions. [2021-10-28 23:45:36,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.4375) internal successors, (887), 16 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:36,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:36,414 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:36,415 INFO L186 Difference]: Start difference. First operand has 110 places, 72 transitions, 338 flow. Second operand 16 states and 887 transitions. [2021-10-28 23:45:36,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 110 transitions, 787 flow [2021-10-28 23:45:36,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 110 transitions, 710 flow, removed 30 selfloop flow, removed 9 redundant places. [2021-10-28 23:45:36,424 INFO L242 Difference]: Finished difference. Result has 123 places, 80 transitions, 502 flow [2021-10-28 23:45:36,425 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=502, PETRI_PLACES=123, PETRI_TRANSITIONS=80} [2021-10-28 23:45:36,426 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 54 predicate places. [2021-10-28 23:45:36,426 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 80 transitions, 502 flow [2021-10-28 23:45:36,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:36,427 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:36,427 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:36,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 23:45:36,427 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:36,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:36,428 INFO L85 PathProgramCache]: Analyzing trace with hash -265714934, now seen corresponding path program 7 times [2021-10-28 23:45:36,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:36,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032217161] [2021-10-28 23:45:36,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:36,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:36,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:36,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032217161] [2021-10-28 23:45:36,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032217161] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:36,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:36,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:36,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003137886] [2021-10-28 23:45:36,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:36,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:36,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:36,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:36,624 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:36,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 80 transitions, 502 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:36,625 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:36,626 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:36,626 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:36,921 INFO L129 PetriNetUnfolder]: 10/343 cut-off events. [2021-10-28 23:45:36,921 INFO L130 PetriNetUnfolder]: For 1123/1143 co-relation queries the response was YES. [2021-10-28 23:45:36,923 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 343 events. 10/343 cut-off events. For 1123/1143 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2240 event pairs, 4 based on Foata normal form. 3/343 useless extension candidates. Maximal degree in co-relation 955. Up to 57 conditions per place. [2021-10-28 23:45:36,925 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 47 selfloop transitions, 7 changer transitions 11/106 dead transitions. [2021-10-28 23:45:36,925 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 106 transitions, 904 flow [2021-10-28 23:45:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:45:36,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 23:45:36,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 561 transitions. [2021-10-28 23:45:36,928 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.748 [2021-10-28 23:45:36,928 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 561 transitions. [2021-10-28 23:45:36,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 561 transitions. [2021-10-28 23:45:36,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:36,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 561 transitions. [2021-10-28 23:45:36,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.1) internal successors, (561), 10 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:36,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:36,933 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:36,933 INFO L186 Difference]: Start difference. First operand has 123 places, 80 transitions, 502 flow. Second operand 10 states and 561 transitions. [2021-10-28 23:45:36,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 106 transitions, 904 flow [2021-10-28 23:45:36,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 106 transitions, 842 flow, removed 31 selfloop flow, removed 8 redundant places. [2021-10-28 23:45:36,945 INFO L242 Difference]: Finished difference. Result has 124 places, 83 transitions, 545 flow [2021-10-28 23:45:36,946 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=545, PETRI_PLACES=124, PETRI_TRANSITIONS=83} [2021-10-28 23:45:36,946 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 55 predicate places. [2021-10-28 23:45:36,946 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 83 transitions, 545 flow [2021-10-28 23:45:36,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:36,947 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:36,947 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:36,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 23:45:36,948 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:36,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:36,948 INFO L85 PathProgramCache]: Analyzing trace with hash -391569458, now seen corresponding path program 8 times [2021-10-28 23:45:36,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:36,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417947783] [2021-10-28 23:45:36,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:36,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:37,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:37,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417947783] [2021-10-28 23:45:37,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417947783] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:37,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:37,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:37,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802110162] [2021-10-28 23:45:37,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:37,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:37,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:37,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:37,122 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:37,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 83 transitions, 545 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:37,123 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:37,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:37,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:37,505 INFO L129 PetriNetUnfolder]: 10/317 cut-off events. [2021-10-28 23:45:37,506 INFO L130 PetriNetUnfolder]: For 1160/1192 co-relation queries the response was YES. [2021-10-28 23:45:37,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 317 events. 10/317 cut-off events. For 1160/1192 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1995 event pairs, 5 based on Foata normal form. 12/326 useless extension candidates. Maximal degree in co-relation 909. Up to 64 conditions per place. [2021-10-28 23:45:37,510 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 31 selfloop transitions, 5 changer transitions 29/106 dead transitions. [2021-10-28 23:45:37,510 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 106 transitions, 926 flow [2021-10-28 23:45:37,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:45:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-28 23:45:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 824 transitions. [2021-10-28 23:45:37,513 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7324444444444445 [2021-10-28 23:45:37,513 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 824 transitions. [2021-10-28 23:45:37,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 824 transitions. [2021-10-28 23:45:37,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:37,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 824 transitions. [2021-10-28 23:45:37,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 54.93333333333333) internal successors, (824), 15 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:37,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 75.0) internal successors, (1200), 16 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:37,520 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 75.0) internal successors, (1200), 16 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:37,520 INFO L186 Difference]: Start difference. First operand has 124 places, 83 transitions, 545 flow. Second operand 15 states and 824 transitions. [2021-10-28 23:45:37,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 106 transitions, 926 flow [2021-10-28 23:45:37,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 106 transitions, 891 flow, removed 16 selfloop flow, removed 5 redundant places. [2021-10-28 23:45:37,533 INFO L242 Difference]: Finished difference. Result has 136 places, 73 transitions, 396 flow [2021-10-28 23:45:37,534 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=396, PETRI_PLACES=136, PETRI_TRANSITIONS=73} [2021-10-28 23:45:37,535 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 67 predicate places. [2021-10-28 23:45:37,536 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 73 transitions, 396 flow [2021-10-28 23:45:37,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:37,536 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:37,537 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:37,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-28 23:45:37,537 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:37,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:37,538 INFO L85 PathProgramCache]: Analyzing trace with hash -657014896, now seen corresponding path program 9 times [2021-10-28 23:45:37,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:37,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514241185] [2021-10-28 23:45:37,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:37,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:37,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:37,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514241185] [2021-10-28 23:45:37,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514241185] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:37,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:37,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:37,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403921086] [2021-10-28 23:45:37,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:37,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:37,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:37,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:37,742 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:37,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 73 transitions, 396 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:37,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:37,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:37,744 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:38,123 INFO L129 PetriNetUnfolder]: 7/278 cut-off events. [2021-10-28 23:45:38,124 INFO L130 PetriNetUnfolder]: For 993/1015 co-relation queries the response was YES. [2021-10-28 23:45:38,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 278 events. 7/278 cut-off events. For 993/1015 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1601 event pairs, 5 based on Foata normal form. 7/283 useless extension candidates. Maximal degree in co-relation 813. Up to 41 conditions per place. [2021-10-28 23:45:38,127 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 40 selfloop transitions, 11 changer transitions 14/106 dead transitions. [2021-10-28 23:45:38,127 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 106 transitions, 816 flow [2021-10-28 23:45:38,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:45:38,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-28 23:45:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 890 transitions. [2021-10-28 23:45:38,132 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7416666666666667 [2021-10-28 23:45:38,132 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 890 transitions. [2021-10-28 23:45:38,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 890 transitions. [2021-10-28 23:45:38,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:38,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 890 transitions. [2021-10-28 23:45:38,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.625) internal successors, (890), 16 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:38,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:38,160 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:38,160 INFO L186 Difference]: Start difference. First operand has 136 places, 73 transitions, 396 flow. Second operand 16 states and 890 transitions. [2021-10-28 23:45:38,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 106 transitions, 816 flow [2021-10-28 23:45:38,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 106 transitions, 667 flow, removed 69 selfloop flow, removed 15 redundant places. [2021-10-28 23:45:38,171 INFO L242 Difference]: Finished difference. Result has 130 places, 77 transitions, 445 flow [2021-10-28 23:45:38,171 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=445, PETRI_PLACES=130, PETRI_TRANSITIONS=77} [2021-10-28 23:45:38,172 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 61 predicate places. [2021-10-28 23:45:38,172 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 77 transitions, 445 flow [2021-10-28 23:45:38,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:38,172 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:38,173 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:38,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-28 23:45:38,173 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:38,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:38,174 INFO L85 PathProgramCache]: Analyzing trace with hash -760491658, now seen corresponding path program 10 times [2021-10-28 23:45:38,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:38,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608469315] [2021-10-28 23:45:38,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:38,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:38,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:38,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608469315] [2021-10-28 23:45:38,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608469315] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:38,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:38,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:38,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460556376] [2021-10-28 23:45:38,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:38,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:38,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:38,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:38,377 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:38,378 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 77 transitions, 445 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:38,378 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:38,379 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:38,379 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:38,651 INFO L129 PetriNetUnfolder]: 6/270 cut-off events. [2021-10-28 23:45:38,652 INFO L130 PetriNetUnfolder]: For 802/823 co-relation queries the response was YES. [2021-10-28 23:45:38,653 INFO L84 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 270 events. 6/270 cut-off events. For 802/823 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1531 event pairs, 5 based on Foata normal form. 5/273 useless extension candidates. Maximal degree in co-relation 758. Up to 51 conditions per place. [2021-10-28 23:45:38,655 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 35 selfloop transitions, 8 changer transitions 10/94 dead transitions. [2021-10-28 23:45:38,655 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 94 transitions, 709 flow [2021-10-28 23:45:38,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:45:38,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 23:45:38,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 561 transitions. [2021-10-28 23:45:38,662 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.748 [2021-10-28 23:45:38,662 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 561 transitions. [2021-10-28 23:45:38,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 561 transitions. [2021-10-28 23:45:38,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:38,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 561 transitions. [2021-10-28 23:45:38,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.1) internal successors, (561), 10 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:38,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:38,668 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:38,668 INFO L186 Difference]: Start difference. First operand has 130 places, 77 transitions, 445 flow. Second operand 10 states and 561 transitions. [2021-10-28 23:45:38,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 94 transitions, 709 flow [2021-10-28 23:45:38,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 94 transitions, 654 flow, removed 21 selfloop flow, removed 9 redundant places. [2021-10-28 23:45:38,678 INFO L242 Difference]: Finished difference. Result has 129 places, 77 transitions, 440 flow [2021-10-28 23:45:38,678 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=440, PETRI_PLACES=129, PETRI_TRANSITIONS=77} [2021-10-28 23:45:38,679 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 60 predicate places. [2021-10-28 23:45:38,679 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 77 transitions, 440 flow [2021-10-28 23:45:38,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:38,680 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:38,680 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:38,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-28 23:45:38,680 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:38,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:38,681 INFO L85 PathProgramCache]: Analyzing trace with hash -617420912, now seen corresponding path program 11 times [2021-10-28 23:45:38,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:38,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555599405] [2021-10-28 23:45:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:38,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:38,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:38,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555599405] [2021-10-28 23:45:38,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555599405] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:38,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:38,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:38,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076903313] [2021-10-28 23:45:38,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:38,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:38,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:38,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:38,895 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:38,896 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 77 transitions, 440 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:38,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:38,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:38,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:39,155 INFO L129 PetriNetUnfolder]: 5/261 cut-off events. [2021-10-28 23:45:39,156 INFO L130 PetriNetUnfolder]: For 698/711 co-relation queries the response was YES. [2021-10-28 23:45:39,157 INFO L84 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 261 events. 5/261 cut-off events. For 698/711 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1432 event pairs, 5 based on Foata normal form. 5/264 useless extension candidates. Maximal degree in co-relation 705. Up to 49 conditions per place. [2021-10-28 23:45:39,159 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 39 selfloop transitions, 8 changer transitions 8/96 dead transitions. [2021-10-28 23:45:39,159 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 96 transitions, 689 flow [2021-10-28 23:45:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:45:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 23:45:39,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 565 transitions. [2021-10-28 23:45:39,163 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7533333333333333 [2021-10-28 23:45:39,163 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 565 transitions. [2021-10-28 23:45:39,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 565 transitions. [2021-10-28 23:45:39,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:39,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 565 transitions. [2021-10-28 23:45:39,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.5) internal successors, (565), 10 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:39,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:39,168 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:39,168 INFO L186 Difference]: Start difference. First operand has 129 places, 77 transitions, 440 flow. Second operand 10 states and 565 transitions. [2021-10-28 23:45:39,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 96 transitions, 689 flow [2021-10-28 23:45:39,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 96 transitions, 612 flow, removed 24 selfloop flow, removed 10 redundant places. [2021-10-28 23:45:39,181 INFO L242 Difference]: Finished difference. Result has 130 places, 79 transitions, 450 flow [2021-10-28 23:45:39,182 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=450, PETRI_PLACES=130, PETRI_TRANSITIONS=79} [2021-10-28 23:45:39,182 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 61 predicate places. [2021-10-28 23:45:39,182 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 79 transitions, 450 flow [2021-10-28 23:45:39,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:39,183 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:39,183 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:39,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-28 23:45:39,183 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:39,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:39,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2143425732, now seen corresponding path program 12 times [2021-10-28 23:45:39,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:39,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305627183] [2021-10-28 23:45:39,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:39,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:39,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:39,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305627183] [2021-10-28 23:45:39,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305627183] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:39,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:39,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:39,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357279719] [2021-10-28 23:45:39,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:39,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:39,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:39,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:39,392 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:39,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 79 transitions, 450 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:39,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:39,394 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:39,394 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:39,670 INFO L129 PetriNetUnfolder]: 5/248 cut-off events. [2021-10-28 23:45:39,670 INFO L130 PetriNetUnfolder]: For 542/555 co-relation queries the response was YES. [2021-10-28 23:45:39,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 248 events. 5/248 cut-off events. For 542/555 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1320 event pairs, 5 based on Foata normal form. 5/251 useless extension candidates. Maximal degree in co-relation 658. Up to 49 conditions per place. [2021-10-28 23:45:39,673 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 34 selfloop transitions, 5 changer transitions 12/92 dead transitions. [2021-10-28 23:45:39,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 92 transitions, 653 flow [2021-10-28 23:45:39,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:45:39,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 23:45:39,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 561 transitions. [2021-10-28 23:45:39,676 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.748 [2021-10-28 23:45:39,676 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 561 transitions. [2021-10-28 23:45:39,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 561 transitions. [2021-10-28 23:45:39,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:39,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 561 transitions. [2021-10-28 23:45:39,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.1) internal successors, (561), 10 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:39,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:39,681 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:39,681 INFO L186 Difference]: Start difference. First operand has 130 places, 79 transitions, 450 flow. Second operand 10 states and 561 transitions. [2021-10-28 23:45:39,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 92 transitions, 653 flow [2021-10-28 23:45:39,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 92 transitions, 617 flow, removed 13 selfloop flow, removed 6 redundant places. [2021-10-28 23:45:39,690 INFO L242 Difference]: Finished difference. Result has 133 places, 75 transitions, 391 flow [2021-10-28 23:45:39,691 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=391, PETRI_PLACES=133, PETRI_TRANSITIONS=75} [2021-10-28 23:45:39,691 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 64 predicate places. [2021-10-28 23:45:39,691 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 75 transitions, 391 flow [2021-10-28 23:45:39,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:39,692 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:39,692 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:39,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-28 23:45:39,693 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:39,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:39,693 INFO L85 PathProgramCache]: Analyzing trace with hash 159473990, now seen corresponding path program 13 times [2021-10-28 23:45:39,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:39,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64006935] [2021-10-28 23:45:39,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:39,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:39,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:39,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64006935] [2021-10-28 23:45:39,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64006935] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:39,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:39,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:39,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887590610] [2021-10-28 23:45:39,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:39,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:39,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:39,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:39,899 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:39,899 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 75 transitions, 391 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:39,899 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:39,900 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:39,900 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:40,273 INFO L129 PetriNetUnfolder]: 5/217 cut-off events. [2021-10-28 23:45:40,273 INFO L130 PetriNetUnfolder]: For 469/482 co-relation queries the response was YES. [2021-10-28 23:45:40,275 INFO L84 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 217 events. 5/217 cut-off events. For 469/482 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1040 event pairs, 5 based on Foata normal form. 7/222 useless extension candidates. Maximal degree in co-relation 573. Up to 39 conditions per place. [2021-10-28 23:45:40,276 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 21 selfloop transitions, 2 changer transitions 24/88 dead transitions. [2021-10-28 23:45:40,276 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 88 transitions, 588 flow [2021-10-28 23:45:40,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:45:40,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-28 23:45:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 875 transitions. [2021-10-28 23:45:40,279 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7291666666666666 [2021-10-28 23:45:40,280 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 875 transitions. [2021-10-28 23:45:40,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 875 transitions. [2021-10-28 23:45:40,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:40,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 875 transitions. [2021-10-28 23:45:40,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 54.6875) internal successors, (875), 16 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:40,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:40,287 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:40,287 INFO L186 Difference]: Start difference. First operand has 133 places, 75 transitions, 391 flow. Second operand 16 states and 875 transitions. [2021-10-28 23:45:40,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 88 transitions, 588 flow [2021-10-28 23:45:40,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 88 transitions, 532 flow, removed 14 selfloop flow, removed 14 redundant places. [2021-10-28 23:45:40,295 INFO L242 Difference]: Finished difference. Result has 133 places, 63 transitions, 231 flow [2021-10-28 23:45:40,296 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=231, PETRI_PLACES=133, PETRI_TRANSITIONS=63} [2021-10-28 23:45:40,296 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 64 predicate places. [2021-10-28 23:45:40,296 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 63 transitions, 231 flow [2021-10-28 23:45:40,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:40,297 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:40,297 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:40,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-28 23:45:40,298 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:40,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1717179428, now seen corresponding path program 14 times [2021-10-28 23:45:40,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:40,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975463449] [2021-10-28 23:45:40,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:40,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:40,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:40,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975463449] [2021-10-28 23:45:40,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975463449] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:40,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:40,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:40,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792137866] [2021-10-28 23:45:40,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:40,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:40,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:40,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:40,489 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:40,490 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 63 transitions, 231 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:40,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:40,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:40,491 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:40,728 INFO L129 PetriNetUnfolder]: 4/165 cut-off events. [2021-10-28 23:45:40,728 INFO L130 PetriNetUnfolder]: For 277/283 co-relation queries the response was YES. [2021-10-28 23:45:40,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 165 events. 4/165 cut-off events. For 277/283 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 616 event pairs, 2 based on Foata normal form. 2/166 useless extension candidates. Maximal degree in co-relation 413. Up to 30 conditions per place. [2021-10-28 23:45:40,730 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 25 selfloop transitions, 6 changer transitions 7/79 dead transitions. [2021-10-28 23:45:40,731 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 79 transitions, 435 flow [2021-10-28 23:45:40,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:45:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 23:45:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 554 transitions. [2021-10-28 23:45:40,733 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7386666666666667 [2021-10-28 23:45:40,734 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 554 transitions. [2021-10-28 23:45:40,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 554 transitions. [2021-10-28 23:45:40,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:40,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 554 transitions. [2021-10-28 23:45:40,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.4) internal successors, (554), 10 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:40,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:40,739 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:40,739 INFO L186 Difference]: Start difference. First operand has 133 places, 63 transitions, 231 flow. Second operand 10 states and 554 transitions. [2021-10-28 23:45:40,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 79 transitions, 435 flow [2021-10-28 23:45:40,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 79 transitions, 363 flow, removed 29 selfloop flow, removed 17 redundant places. [2021-10-28 23:45:40,744 INFO L242 Difference]: Finished difference. Result has 104 places, 65 transitions, 235 flow [2021-10-28 23:45:40,745 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=235, PETRI_PLACES=104, PETRI_TRANSITIONS=65} [2021-10-28 23:45:40,745 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 35 predicate places. [2021-10-28 23:45:40,746 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 65 transitions, 235 flow [2021-10-28 23:45:40,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:40,746 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:40,747 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:40,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-28 23:45:40,747 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:40,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:40,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1692819958, now seen corresponding path program 15 times [2021-10-28 23:45:40,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:40,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771031717] [2021-10-28 23:45:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:40,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:40,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:40,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771031717] [2021-10-28 23:45:40,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771031717] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:40,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:40,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:40,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153811324] [2021-10-28 23:45:40,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:40,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:40,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:40,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:40,963 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:40,963 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 65 transitions, 235 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:40,964 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:40,964 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:40,964 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:41,208 INFO L129 PetriNetUnfolder]: 3/167 cut-off events. [2021-10-28 23:45:41,209 INFO L130 PetriNetUnfolder]: For 177/183 co-relation queries the response was YES. [2021-10-28 23:45:41,210 INFO L84 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 167 events. 3/167 cut-off events. For 177/183 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 648 event pairs, 2 based on Foata normal form. 2/168 useless extension candidates. Maximal degree in co-relation 393. Up to 25 conditions per place. [2021-10-28 23:45:41,213 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 26 selfloop transitions, 6 changer transitions 7/80 dead transitions. [2021-10-28 23:45:41,213 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 80 transitions, 406 flow [2021-10-28 23:45:41,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:45:41,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 23:45:41,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 555 transitions. [2021-10-28 23:45:41,216 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.74 [2021-10-28 23:45:41,216 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 555 transitions. [2021-10-28 23:45:41,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 555 transitions. [2021-10-28 23:45:41,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:41,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 555 transitions. [2021-10-28 23:45:41,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.5) internal successors, (555), 10 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:41,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:41,222 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:41,222 INFO L186 Difference]: Start difference. First operand has 104 places, 65 transitions, 235 flow. Second operand 10 states and 555 transitions. [2021-10-28 23:45:41,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 80 transitions, 406 flow [2021-10-28 23:45:41,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 80 transitions, 381 flow, removed 8 selfloop flow, removed 6 redundant places. [2021-10-28 23:45:41,227 INFO L242 Difference]: Finished difference. Result has 110 places, 66 transitions, 261 flow [2021-10-28 23:45:41,228 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=261, PETRI_PLACES=110, PETRI_TRANSITIONS=66} [2021-10-28 23:45:41,228 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 41 predicate places. [2021-10-28 23:45:41,229 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 66 transitions, 261 flow [2021-10-28 23:45:41,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:41,229 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:41,230 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:41,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-28 23:45:41,230 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:41,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:41,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1241301456, now seen corresponding path program 16 times [2021-10-28 23:45:41,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:41,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494364759] [2021-10-28 23:45:41,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:41,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:41,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:41,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494364759] [2021-10-28 23:45:41,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494364759] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:41,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:41,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:41,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571960118] [2021-10-28 23:45:41,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:41,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:41,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:41,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:41,437 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:41,438 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 66 transitions, 261 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:41,438 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:41,438 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:41,438 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:41,675 INFO L129 PetriNetUnfolder]: 2/162 cut-off events. [2021-10-28 23:45:41,675 INFO L130 PetriNetUnfolder]: For 228/236 co-relation queries the response was YES. [2021-10-28 23:45:41,676 INFO L84 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 162 events. 2/162 cut-off events. For 228/236 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 611 event pairs, 2 based on Foata normal form. 4/165 useless extension candidates. Maximal degree in co-relation 393. Up to 25 conditions per place. [2021-10-28 23:45:41,677 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 29 selfloop transitions, 7 changer transitions 4/81 dead transitions. [2021-10-28 23:45:41,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 81 transitions, 426 flow [2021-10-28 23:45:41,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:45:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 23:45:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 558 transitions. [2021-10-28 23:45:41,683 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.744 [2021-10-28 23:45:41,684 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 558 transitions. [2021-10-28 23:45:41,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 558 transitions. [2021-10-28 23:45:41,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:41,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 558 transitions. [2021-10-28 23:45:41,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.8) internal successors, (558), 10 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:41,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:41,688 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:41,689 INFO L186 Difference]: Start difference. First operand has 110 places, 66 transitions, 261 flow. Second operand 10 states and 558 transitions. [2021-10-28 23:45:41,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 81 transitions, 426 flow [2021-10-28 23:45:41,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 81 transitions, 363 flow, removed 21 selfloop flow, removed 9 redundant places. [2021-10-28 23:45:41,694 INFO L242 Difference]: Finished difference. Result has 112 places, 68 transitions, 277 flow [2021-10-28 23:45:41,694 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=277, PETRI_PLACES=112, PETRI_TRANSITIONS=68} [2021-10-28 23:45:41,694 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 43 predicate places. [2021-10-28 23:45:41,695 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 68 transitions, 277 flow [2021-10-28 23:45:41,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:41,695 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:41,695 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:41,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-28 23:45:41,696 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:41,697 INFO L85 PathProgramCache]: Analyzing trace with hash 544611928, now seen corresponding path program 17 times [2021-10-28 23:45:41,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:41,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145487712] [2021-10-28 23:45:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:41,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:41,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:41,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145487712] [2021-10-28 23:45:41,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145487712] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:41,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:41,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:41,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516321112] [2021-10-28 23:45:41,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:41,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:41,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:41,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:41,909 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:41,910 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 68 transitions, 277 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:41,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:41,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:41,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:42,129 INFO L129 PetriNetUnfolder]: 2/152 cut-off events. [2021-10-28 23:45:42,130 INFO L130 PetriNetUnfolder]: For 166/174 co-relation queries the response was YES. [2021-10-28 23:45:42,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 152 events. 2/152 cut-off events. For 166/174 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 534 event pairs, 2 based on Foata normal form. 4/155 useless extension candidates. Maximal degree in co-relation 365. Up to 25 conditions per place. [2021-10-28 23:45:42,132 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 24 selfloop transitions, 4 changer transitions 8/77 dead transitions. [2021-10-28 23:45:42,132 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 77 transitions, 394 flow [2021-10-28 23:45:42,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:45:42,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 23:45:42,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 554 transitions. [2021-10-28 23:45:42,135 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7386666666666667 [2021-10-28 23:45:42,135 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 554 transitions. [2021-10-28 23:45:42,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 554 transitions. [2021-10-28 23:45:42,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:42,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 554 transitions. [2021-10-28 23:45:42,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.4) internal successors, (554), 10 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:42,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:42,140 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:42,140 INFO L186 Difference]: Start difference. First operand has 112 places, 68 transitions, 277 flow. Second operand 10 states and 554 transitions. [2021-10-28 23:45:42,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 77 transitions, 394 flow [2021-10-28 23:45:42,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 77 transitions, 364 flow, removed 11 selfloop flow, removed 6 redundant places. [2021-10-28 23:45:42,146 INFO L242 Difference]: Finished difference. Result has 116 places, 65 transitions, 240 flow [2021-10-28 23:45:42,146 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=240, PETRI_PLACES=116, PETRI_TRANSITIONS=65} [2021-10-28 23:45:42,146 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 47 predicate places. [2021-10-28 23:45:42,147 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 65 transitions, 240 flow [2021-10-28 23:45:42,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:42,147 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:42,148 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:42,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-28 23:45:42,148 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:42,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:42,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1503460560, now seen corresponding path program 18 times [2021-10-28 23:45:42,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:42,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761598225] [2021-10-28 23:45:42,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:42,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:42,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:42,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761598225] [2021-10-28 23:45:42,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761598225] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:42,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:42,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:42,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873404312] [2021-10-28 23:45:42,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:42,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:42,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:42,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:42,345 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:42,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 65 transitions, 240 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:42,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:42,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:42,347 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:42,571 INFO L129 PetriNetUnfolder]: 2/125 cut-off events. [2021-10-28 23:45:42,572 INFO L130 PetriNetUnfolder]: For 123/129 co-relation queries the response was YES. [2021-10-28 23:45:42,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 125 events. 2/125 cut-off events. For 123/129 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 337 event pairs, 2 based on Foata normal form. 3/127 useless extension candidates. Maximal degree in co-relation 293. Up to 20 conditions per place. [2021-10-28 23:45:42,573 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 17 selfloop transitions, 3 changer transitions 10/71 dead transitions. [2021-10-28 23:45:42,573 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 71 transitions, 336 flow [2021-10-28 23:45:42,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:45:42,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 23:45:42,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 548 transitions. [2021-10-28 23:45:42,576 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7306666666666667 [2021-10-28 23:45:42,576 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 548 transitions. [2021-10-28 23:45:42,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 548 transitions. [2021-10-28 23:45:42,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:42,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 548 transitions. [2021-10-28 23:45:42,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 54.8) internal successors, (548), 10 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:42,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:42,582 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:42,582 INFO L186 Difference]: Start difference. First operand has 116 places, 65 transitions, 240 flow. Second operand 10 states and 548 transitions. [2021-10-28 23:45:42,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 71 transitions, 336 flow [2021-10-28 23:45:42,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 71 transitions, 300 flow, removed 11 selfloop flow, removed 13 redundant places. [2021-10-28 23:45:42,586 INFO L242 Difference]: Finished difference. Result has 108 places, 61 transitions, 182 flow [2021-10-28 23:45:42,587 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=182, PETRI_PLACES=108, PETRI_TRANSITIONS=61} [2021-10-28 23:45:42,590 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 39 predicate places. [2021-10-28 23:45:42,590 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 61 transitions, 182 flow [2021-10-28 23:45:42,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:42,591 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:42,591 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:42,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-28 23:45:42,592 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:42,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:42,593 INFO L85 PathProgramCache]: Analyzing trace with hash -616209836, now seen corresponding path program 19 times [2021-10-28 23:45:42,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:42,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002898606] [2021-10-28 23:45:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:42,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:42,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:42,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002898606] [2021-10-28 23:45:42,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002898606] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:42,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:42,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:42,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669162802] [2021-10-28 23:45:42,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:42,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:42,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:42,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:42,789 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:42,790 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 61 transitions, 182 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:42,790 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:42,790 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:42,791 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:42,997 INFO L129 PetriNetUnfolder]: 0/114 cut-off events. [2021-10-28 23:45:42,997 INFO L130 PetriNetUnfolder]: For 47/49 co-relation queries the response was YES. [2021-10-28 23:45:42,998 INFO L84 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 114 events. 0/114 cut-off events. For 47/49 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 266 event pairs, 0 based on Foata normal form. 2/115 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-10-28 23:45:42,998 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 14 selfloop transitions, 6 changer transitions 7/68 dead transitions. [2021-10-28 23:45:42,999 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 68 transitions, 280 flow [2021-10-28 23:45:42,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:45:42,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 23:45:43,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 545 transitions. [2021-10-28 23:45:43,001 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7266666666666667 [2021-10-28 23:45:43,001 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 545 transitions. [2021-10-28 23:45:43,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 545 transitions. [2021-10-28 23:45:43,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:43,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 545 transitions. [2021-10-28 23:45:43,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 54.5) internal successors, (545), 10 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:43,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:43,007 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:43,007 INFO L186 Difference]: Start difference. First operand has 108 places, 61 transitions, 182 flow. Second operand 10 states and 545 transitions. [2021-10-28 23:45:43,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 68 transitions, 280 flow [2021-10-28 23:45:43,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 68 transitions, 249 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-10-28 23:45:43,012 INFO L242 Difference]: Finished difference. Result has 98 places, 61 transitions, 178 flow [2021-10-28 23:45:43,012 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=178, PETRI_PLACES=98, PETRI_TRANSITIONS=61} [2021-10-28 23:45:43,013 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 29 predicate places. [2021-10-28 23:45:43,014 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 61 transitions, 178 flow [2021-10-28 23:45:43,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:43,014 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 23:45:43,015 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:45:43,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-28 23:45:43,015 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 23:45:43,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:45:43,016 INFO L85 PathProgramCache]: Analyzing trace with hash 367647626, now seen corresponding path program 20 times [2021-10-28 23:45:43,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:45:43,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392187459] [2021-10-28 23:45:43,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:45:43,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:45:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:45:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:45:43,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:45:43,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392187459] [2021-10-28 23:45:43,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392187459] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:45:43,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:45:43,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:45:43,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060971621] [2021-10-28 23:45:43,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:45:43,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:45:43,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:45:43,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:45:43,210 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 23:45:43,211 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 61 transitions, 178 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:43,211 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 23:45:43,211 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 23:45:43,211 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 23:45:43,394 INFO L129 PetriNetUnfolder]: 0/94 cut-off events. [2021-10-28 23:45:43,394 INFO L130 PetriNetUnfolder]: For 27/29 co-relation queries the response was YES. [2021-10-28 23:45:43,394 INFO L84 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 94 events. 0/94 cut-off events. For 27/29 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 165 event pairs, 0 based on Foata normal form. 2/95 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2021-10-28 23:45:43,395 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 0 selfloop transitions, 0 changer transitions 62/62 dead transitions. [2021-10-28 23:45:43,395 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 62 transitions, 244 flow [2021-10-28 23:45:43,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:45:43,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 23:45:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 541 transitions. [2021-10-28 23:45:43,397 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7213333333333334 [2021-10-28 23:45:43,397 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 541 transitions. [2021-10-28 23:45:43,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 541 transitions. [2021-10-28 23:45:43,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:45:43,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 541 transitions. [2021-10-28 23:45:43,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 54.1) internal successors, (541), 10 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:43,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:43,402 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:43,403 INFO L186 Difference]: Start difference. First operand has 98 places, 61 transitions, 178 flow. Second operand 10 states and 541 transitions. [2021-10-28 23:45:43,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 62 transitions, 244 flow [2021-10-28 23:45:43,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 62 transitions, 228 flow, removed 2 selfloop flow, removed 7 redundant places. [2021-10-28 23:45:43,405 INFO L242 Difference]: Finished difference. Result has 95 places, 0 transitions, 0 flow [2021-10-28 23:45:43,406 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=95, PETRI_TRANSITIONS=0} [2021-10-28 23:45:43,406 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 26 predicate places. [2021-10-28 23:45:43,406 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 0 transitions, 0 flow [2021-10-28 23:45:43,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:45:43,410 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:45:43,411 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-28 23:45:43,411 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-28 23:45:43,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-28 23:45:43,416 INFO L731 BasicCegarLoop]: Path program histogram: [20, 10, 1] [2021-10-28 23:45:43,423 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-28 23:45:43,423 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:45:43,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:45:43 BasicIcfg [2021-10-28 23:45:43,427 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:45:43,428 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:45:43,428 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:45:43,428 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:45:43,429 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:45:26" (3/4) ... [2021-10-28 23:45:43,432 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 23:45:43,441 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-28 23:45:43,441 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-28 23:45:43,451 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-28 23:45:43,451 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 23:45:43,451 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:45:43,452 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:45:43,522 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ebed807-9279-4e53-8e13-3c8c4b75df61/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:45:43,522 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:45:43,524 INFO L168 Benchmark]: Toolchain (without parser) took 18461.63 ms. Allocated memory was 98.6 MB in the beginning and 151.0 MB in the end (delta: 52.4 MB). Free memory was 65.4 MB in the beginning and 43.2 MB in the end (delta: 22.2 MB). Peak memory consumption was 73.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:45:43,525 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 98.6 MB. Free memory is still 53.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:45:43,526 INFO L168 Benchmark]: CACSL2BoogieTranslator took 355.87 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 65.2 MB in the beginning and 100.9 MB in the end (delta: -35.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:45:43,527 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.89 ms. Allocated memory is still 125.8 MB. Free memory was 100.9 MB in the beginning and 99.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:45:43,528 INFO L168 Benchmark]: Boogie Preprocessor took 26.49 ms. Allocated memory is still 125.8 MB. Free memory was 99.1 MB in the beginning and 98.1 MB in the end (delta: 997.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:45:43,529 INFO L168 Benchmark]: RCFGBuilder took 519.50 ms. Allocated memory is still 125.8 MB. Free memory was 98.1 MB in the beginning and 87.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:45:43,529 INFO L168 Benchmark]: TraceAbstraction took 17409.58 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 86.9 MB in the beginning and 45.3 MB in the end (delta: 41.6 MB). Peak memory consumption was 67.9 MB. Max. memory is 16.1 GB. [2021-10-28 23:45:43,530 INFO L168 Benchmark]: Witness Printer took 94.81 ms. Allocated memory is still 151.0 MB. Free memory was 45.3 MB in the beginning and 43.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:45:43,532 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 98.6 MB. Free memory is still 53.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 355.87 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 65.2 MB in the beginning and 100.9 MB in the end (delta: -35.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.89 ms. Allocated memory is still 125.8 MB. Free memory was 100.9 MB in the beginning and 99.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.49 ms. Allocated memory is still 125.8 MB. Free memory was 99.1 MB in the beginning and 98.1 MB in the end (delta: 997.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 519.50 ms. Allocated memory is still 125.8 MB. Free memory was 98.1 MB in the beginning and 87.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17409.58 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 86.9 MB in the beginning and 45.3 MB in the end (delta: 41.6 MB). Peak memory consumption was 67.9 MB. Max. memory is 16.1 GB. * Witness Printer took 94.81 ms. Allocated memory is still 151.0 MB. Free memory was 45.3 MB in the beginning and 43.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 76]: 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 with 1 thread instances CFG has 5 procedures, 95 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 17.2s, OverallIterations: 31, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 9.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 686 SDtfs, 1285 SDslu, 3094 SDs, 0 SdLazy, 2345 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 523 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 6.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=545occurred in iteration=18, InterpolantAutomatonStates: 341, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 1767 NumberOfCodeBlocks, 1767 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1736 ConstructedInterpolants, 0 QuantifiedInterpolants, 10171 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 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! [2021-10-28 23:45:43,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ebed807-9279-4e53-8e13-3c8c4b75df61/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...