./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label25.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label25.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5c11f81acb23d199db5ff3acfeb2ee342874a261 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:57:03,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:57:03,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:57:03,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:57:03,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:57:03,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:57:03,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:57:03,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:57:03,306 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:57:03,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:57:03,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:57:03,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:57:03,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:57:03,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:57:03,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:57:03,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:57:03,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:57:03,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:57:03,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:57:03,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:57:03,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:57:03,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:57:03,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:57:03,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:57:03,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:57:03,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:57:03,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:57:03,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:57:03,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:57:03,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:57:03,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:57:03,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:57:03,370 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:57:03,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:57:03,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:57:03,373 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:57:03,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:57:03,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:57:03,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:57:03,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:57:03,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:57:03,377 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:57:03,425 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:57:03,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:57:03,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:57:03,430 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:57:03,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:57:03,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:57:03,438 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:57:03,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:57:03,439 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:57:03,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:57:03,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:57:03,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:57:03,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:57:03,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:57:03,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:57:03,440 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:57:03,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:57:03,441 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:57:03,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:57:03,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:57:03,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:57:03,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:57:03,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:57:03,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:57:03,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:57:03,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:57:03,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:57:03,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:57:03,443 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:57:03,443 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:57:03,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:57:03,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:57:03,443 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_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c11f81acb23d199db5ff3acfeb2ee342874a261 [2021-10-15 19:57:03,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:57:03,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:57:03,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:57:03,769 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:57:03,770 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:57:03,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem01_label25.c [2021-10-15 19:57:03,851 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/data/eeb95662c/ddfa9ee088104f05acbf5960b832836c/FLAG8f055c6db [2021-10-15 19:57:04,440 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:57:04,441 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/sv-benchmarks/c/eca-rers2012/Problem01_label25.c [2021-10-15 19:57:04,455 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/data/eeb95662c/ddfa9ee088104f05acbf5960b832836c/FLAG8f055c6db [2021-10-15 19:57:04,669 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/data/eeb95662c/ddfa9ee088104f05acbf5960b832836c [2021-10-15 19:57:04,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:57:04,673 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:57:04,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:57:04,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:57:04,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:57:04,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:57:04" (1/1) ... [2021-10-15 19:57:04,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7514285f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:04, skipping insertion in model container [2021-10-15 19:57:04,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:57:04" (1/1) ... [2021-10-15 19:57:04,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:57:04,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:57:05,162 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_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/sv-benchmarks/c/eca-rers2012/Problem01_label25.c[20346,20359] [2021-10-15 19:57:05,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:57:05,225 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:57:05,359 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_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/sv-benchmarks/c/eca-rers2012/Problem01_label25.c[20346,20359] [2021-10-15 19:57:05,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:57:05,406 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:57:05,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:05 WrapperNode [2021-10-15 19:57:05,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:57:05,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:57:05,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:57:05,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:57:05,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:05" (1/1) ... [2021-10-15 19:57:05,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:05" (1/1) ... [2021-10-15 19:57:05,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:57:05,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:57:05,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:57:05,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:57:05,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:05" (1/1) ... [2021-10-15 19:57:05,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:05" (1/1) ... [2021-10-15 19:57:05,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:05" (1/1) ... [2021-10-15 19:57:05,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:05" (1/1) ... [2021-10-15 19:57:05,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:05" (1/1) ... [2021-10-15 19:57:05,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:05" (1/1) ... [2021-10-15 19:57:05,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:05" (1/1) ... [2021-10-15 19:57:05,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:57:05,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:57:05,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:57:05,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:57:05,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:05" (1/1) ... [2021-10-15 19:57:05,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:57:05,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:57:05,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:57:05,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:57:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:57:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:57:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:57:05,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:57:06,691 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:57:06,691 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:57:06,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:57:06 BoogieIcfgContainer [2021-10-15 19:57:06,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:57:06,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:57:06,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:57:06,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:57:06,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:57:04" (1/3) ... [2021-10-15 19:57:06,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779f37c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:57:06, skipping insertion in model container [2021-10-15 19:57:06,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:05" (2/3) ... [2021-10-15 19:57:06,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779f37c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:57:06, skipping insertion in model container [2021-10-15 19:57:06,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:57:06" (3/3) ... [2021-10-15 19:57:06,702 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label25.c [2021-10-15 19:57:06,707 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:57:06,708 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:57:06,756 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:57:06,762 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:57:06,763 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:57:06,782 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 198 places, 327 transitions, 654 flow [2021-10-15 19:57:06,870 INFO L129 PetriNetUnfolder]: 130/327 cut-off events. [2021-10-15 19:57:06,870 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:57:06,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 327 events. 130/327 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 203 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2021-10-15 19:57:06,873 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 327 transitions, 654 flow [2021-10-15 19:57:06,884 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 322 transitions, 644 flow [2021-10-15 19:57:06,915 INFO L129 PetriNetUnfolder]: 115/284 cut-off events. [2021-10-15 19:57:06,915 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:57:06,915 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:06,916 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:06,917 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:06,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:06,922 INFO L82 PathProgramCache]: Analyzing trace with hash -278930290, now seen corresponding path program 1 times [2021-10-15 19:57:06,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:06,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808835988] [2021-10-15 19:57:06,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:06,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:57:07,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:07,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808835988] [2021-10-15 19:57:07,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808835988] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:07,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:07,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:57:07,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956041158] [2021-10-15 19:57:07,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:57:07,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:07,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:57:07,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:57:07,596 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:07,600 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 322 transitions, 644 flow. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:07,600 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:07,600 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:07,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:08,712 INFO L129 PetriNetUnfolder]: 146/602 cut-off events. [2021-10-15 19:57:08,713 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:57:08,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1192 conditions, 602 events. 146/602 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1245 event pairs, 0 based on Foata normal form. 61/457 useless extension candidates. Maximal degree in co-relation 2. Up to 239 conditions per place. [2021-10-15 19:57:08,720 INFO L132 encePairwiseOnDemand]: 138/327 looper letters, 439 selfloop transitions, 64 changer transitions 85/594 dead transitions. [2021-10-15 19:57:08,720 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 594 transitions, 2364 flow [2021-10-15 19:57:08,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:57:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:57:08,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 869 transitions. [2021-10-15 19:57:08,738 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5314984709480123 [2021-10-15 19:57:08,742 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 869 transitions. [2021-10-15 19:57:08,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 869 transitions. [2021-10-15 19:57:08,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:08,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 869 transitions. [2021-10-15 19:57:08,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:08,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:08,771 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:08,773 INFO L186 Difference]: Start difference. First operand has 195 places, 322 transitions, 644 flow. Second operand 5 states and 869 transitions. [2021-10-15 19:57:08,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 594 transitions, 2364 flow [2021-10-15 19:57:08,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 594 transitions, 2364 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:57:08,801 INFO L242 Difference]: Finished difference. Result has 202 places, 255 transitions, 986 flow [2021-10-15 19:57:08,804 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=986, PETRI_PLACES=202, PETRI_TRANSITIONS=255} [2021-10-15 19:57:08,804 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, 7 predicate places. [2021-10-15 19:57:08,805 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 255 transitions, 986 flow [2021-10-15 19:57:08,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:08,806 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:08,806 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:08,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:57:08,807 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:08,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:08,808 INFO L82 PathProgramCache]: Analyzing trace with hash -876569957, now seen corresponding path program 1 times [2021-10-15 19:57:08,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:08,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067958456] [2021-10-15 19:57:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:08,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:57:09,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:09,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067958456] [2021-10-15 19:57:09,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067958456] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:09,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:09,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:57:09,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051983498] [2021-10-15 19:57:09,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:57:09,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:09,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:57:09,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:57:09,111 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:09,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 255 transitions, 986 flow. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:09,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:09,113 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:09,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:10,043 INFO L129 PetriNetUnfolder]: 126/748 cut-off events. [2021-10-15 19:57:10,043 INFO L130 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2021-10-15 19:57:10,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1727 conditions, 748 events. 126/748 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2200 event pairs, 0 based on Foata normal form. 109/857 useless extension candidates. Maximal degree in co-relation 762. Up to 331 conditions per place. [2021-10-15 19:57:10,052 INFO L132 encePairwiseOnDemand]: 258/327 looper letters, 324 selfloop transitions, 12 changer transitions 137/479 dead transitions. [2021-10-15 19:57:10,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 479 transitions, 2398 flow [2021-10-15 19:57:10,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:57:10,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:57:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 564 transitions. [2021-10-15 19:57:10,056 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43119266055045874 [2021-10-15 19:57:10,057 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 564 transitions. [2021-10-15 19:57:10,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 564 transitions. [2021-10-15 19:57:10,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:10,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 564 transitions. [2021-10-15 19:57:10,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:10,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:10,070 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:10,070 INFO L186 Difference]: Start difference. First operand has 202 places, 255 transitions, 986 flow. Second operand 4 states and 564 transitions. [2021-10-15 19:57:10,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 479 transitions, 2398 flow [2021-10-15 19:57:10,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 479 transitions, 2398 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:57:10,103 INFO L242 Difference]: Finished difference. Result has 146 places, 215 transitions, 924 flow [2021-10-15 19:57:10,104 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=924, PETRI_PLACES=146, PETRI_TRANSITIONS=215} [2021-10-15 19:57:10,110 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -49 predicate places. [2021-10-15 19:57:10,111 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 215 transitions, 924 flow [2021-10-15 19:57:10,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:10,111 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:10,111 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:10,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:57:10,112 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:10,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:10,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1786741917, now seen corresponding path program 1 times [2021-10-15 19:57:10,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:10,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234356115] [2021-10-15 19:57:10,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:10,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:57:10,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:10,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234356115] [2021-10-15 19:57:10,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234356115] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:57:10,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130024026] [2021-10-15 19:57:10,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:10,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:10,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:57:10,243 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:57:10,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:57:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:10,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:57:10,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:57:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:57:10,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130024026] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:10,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:57:10,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:57:10,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280994643] [2021-10-15 19:57:10,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:57:10,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:10,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:57:10,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:57:10,910 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:10,910 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 215 transitions, 924 flow. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:10,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:10,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:10,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:11,468 INFO L129 PetriNetUnfolder]: 156/1076 cut-off events. [2021-10-15 19:57:11,469 INFO L130 PetriNetUnfolder]: For 500/500 co-relation queries the response was YES. [2021-10-15 19:57:11,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2605 conditions, 1076 events. 156/1076 cut-off events. For 500/500 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3745 event pairs, 0 based on Foata normal form. 3/1079 useless extension candidates. Maximal degree in co-relation 1720. Up to 625 conditions per place. [2021-10-15 19:57:11,477 INFO L132 encePairwiseOnDemand]: 279/327 looper letters, 334 selfloop transitions, 77 changer transitions 0/417 dead transitions. [2021-10-15 19:57:11,477 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 417 transitions, 2597 flow [2021-10-15 19:57:11,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:57:11,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:57:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2021-10-15 19:57:11,480 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38328236493374107 [2021-10-15 19:57:11,480 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2021-10-15 19:57:11,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2021-10-15 19:57:11,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:11,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2021-10-15 19:57:11,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:11,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:11,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:11,486 INFO L186 Difference]: Start difference. First operand has 146 places, 215 transitions, 924 flow. Second operand 3 states and 376 transitions. [2021-10-15 19:57:11,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 417 transitions, 2597 flow [2021-10-15 19:57:11,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 417 transitions, 2404 flow, removed 87 selfloop flow, removed 2 redundant places. [2021-10-15 19:57:11,516 INFO L242 Difference]: Finished difference. Result has 147 places, 290 transitions, 1792 flow [2021-10-15 19:57:11,517 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1792, PETRI_PLACES=147, PETRI_TRANSITIONS=290} [2021-10-15 19:57:11,517 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -48 predicate places. [2021-10-15 19:57:11,517 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 290 transitions, 1792 flow [2021-10-15 19:57:11,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:11,519 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:11,520 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:11,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:57:11,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:11,737 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1111959670, now seen corresponding path program 1 times [2021-10-15 19:57:11,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:11,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088207921] [2021-10-15 19:57:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:11,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-15 19:57:11,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:11,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088207921] [2021-10-15 19:57:11,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088207921] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:57:11,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221374773] [2021-10-15 19:57:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:11,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:11,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:57:11,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:57:11,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:57:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:12,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:57:12,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:57:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-15 19:57:12,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221374773] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:12,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:57:12,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:57:12,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396813328] [2021-10-15 19:57:12,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:57:12,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:12,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:57:12,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:57:12,525 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:12,526 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 290 transitions, 1792 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:12,526 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:12,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:12,526 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:13,172 INFO L129 PetriNetUnfolder]: 204/1386 cut-off events. [2021-10-15 19:57:13,173 INFO L130 PetriNetUnfolder]: For 1361/1361 co-relation queries the response was YES. [2021-10-15 19:57:13,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3522 conditions, 1386 events. 204/1386 cut-off events. For 1361/1361 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5534 event pairs, 0 based on Foata normal form. 44/1430 useless extension candidates. Maximal degree in co-relation 1730. Up to 1077 conditions per place. [2021-10-15 19:57:13,181 INFO L132 encePairwiseOnDemand]: 286/327 looper letters, 421 selfloop transitions, 38 changer transitions 0/465 dead transitions. [2021-10-15 19:57:13,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 465 transitions, 3408 flow [2021-10-15 19:57:13,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:57:13,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:57:13,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2021-10-15 19:57:13,184 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38328236493374107 [2021-10-15 19:57:13,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2021-10-15 19:57:13,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2021-10-15 19:57:13,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:13,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2021-10-15 19:57:13,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:13,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:13,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:13,196 INFO L186 Difference]: Start difference. First operand has 147 places, 290 transitions, 1792 flow. Second operand 3 states and 376 transitions. [2021-10-15 19:57:13,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 465 transitions, 3408 flow [2021-10-15 19:57:13,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 465 transitions, 3112 flow, removed 47 selfloop flow, removed 2 redundant places. [2021-10-15 19:57:13,216 INFO L242 Difference]: Finished difference. Result has 149 places, 326 transitions, 2168 flow [2021-10-15 19:57:13,217 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2168, PETRI_PLACES=149, PETRI_TRANSITIONS=326} [2021-10-15 19:57:13,217 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -46 predicate places. [2021-10-15 19:57:13,217 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 326 transitions, 2168 flow [2021-10-15 19:57:13,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:13,220 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:13,220 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:13,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:57:13,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:13,438 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:13,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:13,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1207055204, now seen corresponding path program 1 times [2021-10-15 19:57:13,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:13,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224442034] [2021-10-15 19:57:13,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:13,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-10-15 19:57:13,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:13,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224442034] [2021-10-15 19:57:13,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224442034] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:57:13,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226024021] [2021-10-15 19:57:13,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:13,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:13,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:57:13,540 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:57:13,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:57:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:13,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:57:13,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:57:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-15 19:57:14,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226024021] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:14,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:57:14,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:57:14,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932459585] [2021-10-15 19:57:14,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:57:14,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:14,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:57:14,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:57:14,184 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:14,185 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 326 transitions, 2168 flow. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:14,185 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:14,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:14,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:14,906 INFO L129 PetriNetUnfolder]: 258/1702 cut-off events. [2021-10-15 19:57:14,906 INFO L130 PetriNetUnfolder]: For 1654/1654 co-relation queries the response was YES. [2021-10-15 19:57:14,908 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4372 conditions, 1702 events. 258/1702 cut-off events. For 1654/1654 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 7853 event pairs, 0 based on Foata normal form. 18/1720 useless extension candidates. Maximal degree in co-relation 2811. Up to 988 conditions per place. [2021-10-15 19:57:14,917 INFO L132 encePairwiseOnDemand]: 279/327 looper letters, 383 selfloop transitions, 118 changer transitions 0/507 dead transitions. [2021-10-15 19:57:14,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 507 transitions, 3966 flow [2021-10-15 19:57:14,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:57:14,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:57:14,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2021-10-15 19:57:14,920 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.382262996941896 [2021-10-15 19:57:14,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2021-10-15 19:57:14,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2021-10-15 19:57:14,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:14,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2021-10-15 19:57:14,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:14,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:14,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:14,926 INFO L186 Difference]: Start difference. First operand has 149 places, 326 transitions, 2168 flow. Second operand 3 states and 375 transitions. [2021-10-15 19:57:14,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 507 transitions, 3966 flow [2021-10-15 19:57:14,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 507 transitions, 3886 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:57:14,957 INFO L242 Difference]: Finished difference. Result has 151 places, 380 transitions, 3232 flow [2021-10-15 19:57:14,957 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2092, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3232, PETRI_PLACES=151, PETRI_TRANSITIONS=380} [2021-10-15 19:57:14,958 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -44 predicate places. [2021-10-15 19:57:14,958 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 380 transitions, 3232 flow [2021-10-15 19:57:14,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:14,958 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:14,959 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:14,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:57:15,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:15,182 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:15,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:15,183 INFO L82 PathProgramCache]: Analyzing trace with hash -433474744, now seen corresponding path program 1 times [2021-10-15 19:57:15,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:15,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313350249] [2021-10-15 19:57:15,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:15,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-15 19:57:15,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:15,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313350249] [2021-10-15 19:57:15,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313350249] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:15,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:15,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:57:15,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910638444] [2021-10-15 19:57:15,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:57:15,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:15,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:57:15,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:57:15,266 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:15,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 380 transitions, 3232 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:15,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:15,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:15,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:16,094 INFO L129 PetriNetUnfolder]: 281/1987 cut-off events. [2021-10-15 19:57:16,094 INFO L130 PetriNetUnfolder]: For 3163/3163 co-relation queries the response was YES. [2021-10-15 19:57:16,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5290 conditions, 1987 events. 281/1987 cut-off events. For 3163/3163 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 9849 event pairs, 0 based on Foata normal form. 32/2019 useless extension candidates. Maximal degree in co-relation 2777. Up to 1194 conditions per place. [2021-10-15 19:57:16,107 INFO L132 encePairwiseOnDemand]: 293/327 looper letters, 413 selfloop transitions, 111 changer transitions 0/530 dead transitions. [2021-10-15 19:57:16,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 530 transitions, 4756 flow [2021-10-15 19:57:16,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:57:16,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:57:16,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2021-10-15 19:57:16,110 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.363914373088685 [2021-10-15 19:57:16,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2021-10-15 19:57:16,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2021-10-15 19:57:16,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:16,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2021-10-15 19:57:16,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:16,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:16,116 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:16,116 INFO L186 Difference]: Start difference. First operand has 151 places, 380 transitions, 3232 flow. Second operand 3 states and 357 transitions. [2021-10-15 19:57:16,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 530 transitions, 4756 flow [2021-10-15 19:57:16,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 530 transitions, 4468 flow, removed 26 selfloop flow, removed 2 redundant places. [2021-10-15 19:57:16,147 INFO L242 Difference]: Finished difference. Result has 153 places, 403 transitions, 3692 flow [2021-10-15 19:57:16,148 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2944, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3692, PETRI_PLACES=153, PETRI_TRANSITIONS=403} [2021-10-15 19:57:16,148 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -42 predicate places. [2021-10-15 19:57:16,148 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 403 transitions, 3692 flow [2021-10-15 19:57:16,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:16,149 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:16,149 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:16,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:57:16,150 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:16,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:16,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1080317865, now seen corresponding path program 1 times [2021-10-15 19:57:16,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:16,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752562775] [2021-10-15 19:57:16,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:16,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-10-15 19:57:16,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:16,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752562775] [2021-10-15 19:57:16,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752562775] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:16,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:16,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:57:16,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675795191] [2021-10-15 19:57:16,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:57:16,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:16,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:57:16,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:57:16,244 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:16,244 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 403 transitions, 3692 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:16,244 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:16,244 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:16,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:17,581 INFO L129 PetriNetUnfolder]: 355/2585 cut-off events. [2021-10-15 19:57:17,582 INFO L130 PetriNetUnfolder]: For 4742/4742 co-relation queries the response was YES. [2021-10-15 19:57:17,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6985 conditions, 2585 events. 355/2585 cut-off events. For 4742/4742 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 14037 event pairs, 0 based on Foata normal form. 30/2615 useless extension candidates. Maximal degree in co-relation 3815. Up to 1211 conditions per place. [2021-10-15 19:57:17,600 INFO L132 encePairwiseOnDemand]: 279/327 looper letters, 534 selfloop transitions, 185 changer transitions 0/725 dead transitions. [2021-10-15 19:57:17,600 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 725 transitions, 6516 flow [2021-10-15 19:57:17,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:57:17,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:57:17,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 546 transitions. [2021-10-15 19:57:17,603 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41743119266055045 [2021-10-15 19:57:17,603 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 546 transitions. [2021-10-15 19:57:17,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 546 transitions. [2021-10-15 19:57:17,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:17,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 546 transitions. [2021-10-15 19:57:17,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.5) internal successors, (546), 4 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:17,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:17,610 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:17,610 INFO L186 Difference]: Start difference. First operand has 153 places, 403 transitions, 3692 flow. Second operand 4 states and 546 transitions. [2021-10-15 19:57:17,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 725 transitions, 6516 flow [2021-10-15 19:57:17,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 725 transitions, 6256 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:57:17,646 INFO L242 Difference]: Finished difference. Result has 157 places, 471 transitions, 5178 flow [2021-10-15 19:57:17,647 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=3430, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5178, PETRI_PLACES=157, PETRI_TRANSITIONS=471} [2021-10-15 19:57:17,647 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -38 predicate places. [2021-10-15 19:57:17,647 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 471 transitions, 5178 flow [2021-10-15 19:57:17,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:17,647 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:17,648 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:17,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:57:17,648 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:17,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:17,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2111838568, now seen corresponding path program 1 times [2021-10-15 19:57:17,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:17,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904192174] [2021-10-15 19:57:17,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:17,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 103 proven. 29 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-15 19:57:17,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:17,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904192174] [2021-10-15 19:57:17,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904192174] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:57:17,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308159943] [2021-10-15 19:57:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:17,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:17,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:57:17,746 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:57:17,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:57:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:18,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:57:18,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:57:18,602 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-10-15 19:57:18,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308159943] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:18,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:57:18,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:57:18,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911247234] [2021-10-15 19:57:18,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:57:18,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:18,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:57:18,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:57:18,605 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:18,606 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 471 transitions, 5178 flow. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:18,606 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:18,606 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:18,606 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:19,676 INFO L129 PetriNetUnfolder]: 274/2502 cut-off events. [2021-10-15 19:57:19,676 INFO L130 PetriNetUnfolder]: For 6208/6208 co-relation queries the response was YES. [2021-10-15 19:57:19,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6604 conditions, 2502 events. 274/2502 cut-off events. For 6208/6208 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 13943 event pairs, 0 based on Foata normal form. 82/2584 useless extension candidates. Maximal degree in co-relation 3782. Up to 1405 conditions per place. [2021-10-15 19:57:19,683 INFO L132 encePairwiseOnDemand]: 291/327 looper letters, 0 selfloop transitions, 0 changer transitions 515/515 dead transitions. [2021-10-15 19:57:19,684 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 515 transitions, 5182 flow [2021-10-15 19:57:19,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:57:19,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:57:19,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2021-10-15 19:57:19,686 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.363914373088685 [2021-10-15 19:57:19,686 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2021-10-15 19:57:19,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2021-10-15 19:57:19,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:19,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2021-10-15 19:57:19,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:19,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:19,690 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:19,691 INFO L186 Difference]: Start difference. First operand has 157 places, 471 transitions, 5178 flow. Second operand 3 states and 357 transitions. [2021-10-15 19:57:19,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 515 transitions, 5182 flow [2021-10-15 19:57:19,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 515 transitions, 5120 flow, removed 17 selfloop flow, removed 1 redundant places. [2021-10-15 19:57:19,721 INFO L242 Difference]: Finished difference. Result has 156 places, 0 transitions, 0 flow [2021-10-15 19:57:19,721 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=3846, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=156, PETRI_TRANSITIONS=0} [2021-10-15 19:57:19,721 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -39 predicate places. [2021-10-15 19:57:19,722 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 0 transitions, 0 flow [2021-10-15 19:57:19,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:19,724 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:57:19,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-15 19:57:19,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-15 19:57:19,955 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:57:19,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:57:19 BoogieIcfgContainer [2021-10-15 19:57:19,965 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:57:19,966 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:57:19,966 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:57:19,966 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:57:19,966 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:57:06" (3/4) ... [2021-10-15 19:57:19,968 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:57:19,988 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:57:19,990 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:57:19,991 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:57:19,993 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:57:20,112 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:57:20,113 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:57:20,114 INFO L168 Benchmark]: Toolchain (without parser) took 15440.28 ms. Allocated memory was 107.0 MB in the beginning and 234.9 MB in the end (delta: 127.9 MB). Free memory was 67.9 MB in the beginning and 74.1 MB in the end (delta: -6.2 MB). Peak memory consumption was 121.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:20,115 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 107.0 MB. Free memory is still 86.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:57:20,115 INFO L168 Benchmark]: CACSL2BoogieTranslator took 732.20 ms. Allocated memory is still 107.0 MB. Free memory was 67.6 MB in the beginning and 64.5 MB in the end (delta: 3.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:20,116 INFO L168 Benchmark]: Boogie Procedure Inliner took 107.39 ms. Allocated memory is still 107.0 MB. Free memory was 64.5 MB in the beginning and 58.9 MB in the end (delta: 5.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:20,116 INFO L168 Benchmark]: Boogie Preprocessor took 78.86 ms. Allocated memory is still 107.0 MB. Free memory was 58.9 MB in the beginning and 54.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:20,117 INFO L168 Benchmark]: RCFGBuilder took 1098.36 ms. Allocated memory was 107.0 MB in the beginning and 134.2 MB in the end (delta: 27.3 MB). Free memory was 54.6 MB in the beginning and 74.0 MB in the end (delta: -19.4 MB). Peak memory consumption was 33.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:20,117 INFO L168 Benchmark]: TraceAbstraction took 13270.25 ms. Allocated memory was 134.2 MB in the beginning and 234.9 MB in the end (delta: 100.7 MB). Free memory was 74.0 MB in the beginning and 88.4 MB in the end (delta: -14.4 MB). Peak memory consumption was 85.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:20,118 INFO L168 Benchmark]: Witness Printer took 146.98 ms. Allocated memory is still 234.9 MB. Free memory was 88.4 MB in the beginning and 74.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:20,120 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 107.0 MB. Free memory is still 86.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 732.20 ms. Allocated memory is still 107.0 MB. Free memory was 67.6 MB in the beginning and 64.5 MB in the end (delta: 3.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 107.39 ms. Allocated memory is still 107.0 MB. Free memory was 64.5 MB in the beginning and 58.9 MB in the end (delta: 5.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 78.86 ms. Allocated memory is still 107.0 MB. Free memory was 58.9 MB in the beginning and 54.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1098.36 ms. Allocated memory was 107.0 MB in the beginning and 134.2 MB in the end (delta: 27.3 MB). Free memory was 54.6 MB in the beginning and 74.0 MB in the end (delta: -19.4 MB). Peak memory consumption was 33.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13270.25 ms. Allocated memory was 134.2 MB in the beginning and 234.9 MB in the end (delta: 100.7 MB). Free memory was 74.0 MB in the beginning and 88.4 MB in the end (delta: -14.4 MB). Peak memory consumption was 85.3 MB. Max. memory is 16.1 GB. * Witness Printer took 146.98 ms. Allocated memory is still 234.9 MB. Free memory was 88.4 MB in the beginning and 74.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 543]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 198 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 30.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 13202.8ms, OverallIterations: 8, TraceHistogramMax: 5, EmptinessCheckTime: 0.0ms, AutomataDifference: 7701.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 121.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 519 SDtfs, 976 SDslu, 0 SDs, 0 SdLazy, 3393 SolverSat, 618 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3183.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 681 GetRequests, 661 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5178occurred in iteration=7, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 228.4ms SsaConstructionTime, 543.9ms SatisfiabilityAnalysisTime, 2961.3ms InterpolantComputationTime, 1926 NumberOfCodeBlocks, 1926 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1914 ConstructedInterpolants, 0 QuantifiedInterpolants, 7637 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1360 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 12 InterpolantComputations, 8 PerfectInterpolantSequences, 798/836 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:57:20,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83c1a76a-8378-46ba-8e5e-4b2ab5739d07/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...