./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label51.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_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/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_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label51.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/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_6d9c3318-1e14-4d14-84f1-e512a9313025/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 9b662101800a9cac954243c459de117719237e24 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:10:54,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:10:54,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:10:54,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:10:54,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:10:54,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:10:54,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:10:54,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:10:54,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:10:54,136 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:10:54,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:10:54,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:10:54,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:10:54,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:10:54,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:10:54,151 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:10:54,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:10:54,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:10:54,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:10:54,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:10:54,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:10:54,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:10:54,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:10:54,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:10:54,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:10:54,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:10:54,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:10:54,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:10:54,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:10:54,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:10:54,189 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:10:54,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:10:54,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:10:54,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:10:54,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:10:54,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:10:54,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:10:54,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:10:54,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:10:54,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:10:54,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:10:54,201 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:10:54,247 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:10:54,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:10:54,248 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:10:54,249 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:10:54,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:10:54,251 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:10:54,252 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:10:54,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:10:54,252 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:10:54,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:10:54,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:10:54,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:10:54,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:10:54,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:10:54,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:10:54,255 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:10:54,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:10:54,255 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:10:54,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:10:54,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:10:54,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:10:54,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:10:54,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:10:54,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:10:54,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:10:54,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:10:54,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:10:54,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:10:54,258 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:10:54,260 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:10:54,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:10:54,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:10:54,261 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_6d9c3318-1e14-4d14-84f1-e512a9313025/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b662101800a9cac954243c459de117719237e24 [2021-10-15 19:10:54,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:10:54,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:10:54,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:10:54,625 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:10:54,626 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:10:54,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem01_label51.c [2021-10-15 19:10:54,705 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/data/c29c61f74/bffd5d3942a94a5c8399fc8cae770467/FLAGe9b61208c [2021-10-15 19:10:55,254 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:10:55,255 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/sv-benchmarks/c/eca-rers2012/Problem01_label51.c [2021-10-15 19:10:55,297 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/data/c29c61f74/bffd5d3942a94a5c8399fc8cae770467/FLAGe9b61208c [2021-10-15 19:10:55,513 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/data/c29c61f74/bffd5d3942a94a5c8399fc8cae770467 [2021-10-15 19:10:55,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:10:55,516 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:10:55,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:10:55,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:10:55,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:10:55,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:10:55" (1/1) ... [2021-10-15 19:10:55,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@447f61b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:55, skipping insertion in model container [2021-10-15 19:10:55,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:10:55" (1/1) ... [2021-10-15 19:10:55,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:10:55,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:10:55,963 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_6d9c3318-1e14-4d14-84f1-e512a9313025/sv-benchmarks/c/eca-rers2012/Problem01_label51.c[18730,18743] [2021-10-15 19:10:56,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:10:56,022 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:10:56,144 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_6d9c3318-1e14-4d14-84f1-e512a9313025/sv-benchmarks/c/eca-rers2012/Problem01_label51.c[18730,18743] [2021-10-15 19:10:56,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:10:56,176 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:10:56,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56 WrapperNode [2021-10-15 19:10:56,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:10:56,178 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:10:56,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:10:56,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:10:56,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (1/1) ... [2021-10-15 19:10:56,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (1/1) ... [2021-10-15 19:10:56,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:10:56,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:10:56,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:10:56,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:10:56,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (1/1) ... [2021-10-15 19:10:56,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (1/1) ... [2021-10-15 19:10:56,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (1/1) ... [2021-10-15 19:10:56,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (1/1) ... [2021-10-15 19:10:56,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (1/1) ... [2021-10-15 19:10:56,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (1/1) ... [2021-10-15 19:10:56,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (1/1) ... [2021-10-15 19:10:56,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:10:56,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:10:56,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:10:56,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:10:56,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (1/1) ... [2021-10-15 19:10:56,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:10:56,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:10:56,436 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:10:56,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:10:56,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:10:56,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:10:56,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:10:56,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:10:57,669 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:10:57,670 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:10:57,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:10:57 BoogieIcfgContainer [2021-10-15 19:10:57,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:10:57,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:10:57,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:10:57,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:10:57,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:10:55" (1/3) ... [2021-10-15 19:10:57,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@270ad0d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:10:57, skipping insertion in model container [2021-10-15 19:10:57,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:10:56" (2/3) ... [2021-10-15 19:10:57,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@270ad0d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:10:57, skipping insertion in model container [2021-10-15 19:10:57,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:10:57" (3/3) ... [2021-10-15 19:10:57,692 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label51.c [2021-10-15 19:10:57,697 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:10:57,698 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:10:57,786 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:10:57,794 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 19:10:57,795 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:10:57,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 198 places, 327 transitions, 654 flow [2021-10-15 19:10:57,924 INFO L129 PetriNetUnfolder]: 130/327 cut-off events. [2021-10-15 19:10:57,924 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:10:57,928 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 19:10:57,929 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 327 transitions, 654 flow [2021-10-15 19:10:57,940 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 322 transitions, 644 flow [2021-10-15 19:10:57,971 INFO L129 PetriNetUnfolder]: 102/245 cut-off events. [2021-10-15 19:10:57,972 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:10:57,972 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:10:57,973 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] [2021-10-15 19:10:57,973 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:10:57,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:10:57,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1145971337, now seen corresponding path program 1 times [2021-10-15 19:10:57,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:10:57,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712030813] [2021-10-15 19:10:57,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:10:57,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:10:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:10:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:10:58,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:10:58,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712030813] [2021-10-15 19:10:58,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712030813] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:10:58,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:10:58,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:10:58,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979686815] [2021-10-15 19:10:58,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:10:58,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:10:58,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:10:58,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:10:58,523 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:10:58,526 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 322 transitions, 644 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 19:10:58,526 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:10:58,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:10:58,530 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:10:59,504 INFO L129 PetriNetUnfolder]: 128/453 cut-off events. [2021-10-15 19:10:59,505 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:10:59,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 898 conditions, 453 events. 128/453 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 610 event pairs, 0 based on Foata normal form. 61/326 useless extension candidates. Maximal degree in co-relation 1. Up to 241 conditions per place. [2021-10-15 19:10:59,515 INFO L132 encePairwiseOnDemand]: 138/327 looper letters, 314 selfloop transitions, 56 changer transitions 73/449 dead transitions. [2021-10-15 19:10:59,516 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 449 transitions, 1784 flow [2021-10-15 19:10:59,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:10:59,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:10:59,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2021-10-15 19:10:59,540 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6085626911314985 [2021-10-15 19:10:59,541 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2021-10-15 19:10:59,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2021-10-15 19:10:59,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:10:59,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2021-10-15 19:10:59,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states 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 19:10:59,567 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 19:10:59,568 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 19:10:59,570 INFO L186 Difference]: Start difference. First operand has 195 places, 322 transitions, 644 flow. Second operand 3 states and 597 transitions. [2021-10-15 19:10:59,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 449 transitions, 1784 flow [2021-10-15 19:10:59,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 449 transitions, 1784 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:10:59,595 INFO L242 Difference]: Finished difference. Result has 199 places, 249 transitions, 842 flow [2021-10-15 19:10:59,598 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=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=842, PETRI_PLACES=199, PETRI_TRANSITIONS=249} [2021-10-15 19:10:59,599 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, 4 predicate places. [2021-10-15 19:10:59,599 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 249 transitions, 842 flow [2021-10-15 19:10:59,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 19:10:59,600 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:10:59,600 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 19:10:59,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:10:59,602 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:10:59,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:10:59,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1083364170, now seen corresponding path program 1 times [2021-10-15 19:10:59,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:10:59,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147858814] [2021-10-15 19:10:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:10:59,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:10:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:10:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:10:59,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:10:59,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147858814] [2021-10-15 19:10:59,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147858814] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:10:59,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:10:59,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:10:59,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877684671] [2021-10-15 19:10:59,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:10:59,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:10:59,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:10:59,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:10:59,715 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:10:59,715 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 249 transitions, 842 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:10:59,716 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:10:59,716 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:10:59,716 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:11:00,315 INFO L129 PetriNetUnfolder]: 182/709 cut-off events. [2021-10-15 19:11:00,315 INFO L130 PetriNetUnfolder]: For 116/116 co-relation queries the response was YES. [2021-10-15 19:11:00,317 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1674 conditions, 709 events. 182/709 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1564 event pairs, 0 based on Foata normal form. 48/757 useless extension candidates. Maximal degree in co-relation 718. Up to 367 conditions per place. [2021-10-15 19:11:00,323 INFO L132 encePairwiseOnDemand]: 259/327 looper letters, 345 selfloop transitions, 92 changer transitions 0/443 dead transitions. [2021-10-15 19:11:00,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 443 transitions, 2300 flow [2021-10-15 19:11:00,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:11:00,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:11:00,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2021-10-15 19:11:00,327 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4240570846075433 [2021-10-15 19:11:00,328 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2021-10-15 19:11:00,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2021-10-15 19:11:00,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:11:00,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2021-10-15 19:11:00,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states 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 19:11:00,334 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 19:11:00,336 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 19:11:00,336 INFO L186 Difference]: Start difference. First operand has 199 places, 249 transitions, 842 flow. Second operand 3 states and 416 transitions. [2021-10-15 19:11:00,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 443 transitions, 2300 flow [2021-10-15 19:11:00,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 443 transitions, 2126 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:11:00,363 INFO L242 Difference]: Finished difference. Result has 141 places, 316 transitions, 1548 flow [2021-10-15 19:11:00,363 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1548, PETRI_PLACES=141, PETRI_TRANSITIONS=316} [2021-10-15 19:11:00,364 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -54 predicate places. [2021-10-15 19:11:00,365 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 316 transitions, 1548 flow [2021-10-15 19:11:00,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 19:11:00,365 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:11:00,366 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] [2021-10-15 19:11:00,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:11:00,366 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:11:00,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:00,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1869328822, now seen corresponding path program 1 times [2021-10-15 19:11:00,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:00,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802473554] [2021-10-15 19:11:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:00,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:00,563 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 19:11:00,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:00,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802473554] [2021-10-15 19:11:00,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802473554] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:11:00,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:11:00,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:11:00,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145508632] [2021-10-15 19:11:00,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:11:00,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:00,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:11:00,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:11:00,568 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:11:00,569 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 316 transitions, 1548 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:00,569 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:11:00,569 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:11:00,570 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:11:01,471 INFO L129 PetriNetUnfolder]: 193/1077 cut-off events. [2021-10-15 19:11:01,471 INFO L130 PetriNetUnfolder]: For 574/574 co-relation queries the response was YES. [2021-10-15 19:11:01,472 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2614 conditions, 1077 events. 193/1077 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3891 event pairs, 0 based on Foata normal form. 98/1175 useless extension candidates. Maximal degree in co-relation 464. Up to 629 conditions per place. [2021-10-15 19:11:01,478 INFO L132 encePairwiseOnDemand]: 272/327 looper letters, 368 selfloop transitions, 15 changer transitions 157/546 dead transitions. [2021-10-15 19:11:01,479 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 546 transitions, 3140 flow [2021-10-15 19:11:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:11:01,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:11:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 535 transitions. [2021-10-15 19:11:01,483 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4090214067278288 [2021-10-15 19:11:01,484 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 535 transitions. [2021-10-15 19:11:01,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 535 transitions. [2021-10-15 19:11:01,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:11:01,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 535 transitions. [2021-10-15 19:11:01,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states 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 19:11:01,491 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 19:11:01,492 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 19:11:01,493 INFO L186 Difference]: Start difference. First operand has 141 places, 316 transitions, 1548 flow. Second operand 4 states and 535 transitions. [2021-10-15 19:11:01,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 546 transitions, 3140 flow [2021-10-15 19:11:01,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 546 transitions, 2952 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:11:01,523 INFO L242 Difference]: Finished difference. Result has 144 places, 262 transitions, 1231 flow [2021-10-15 19:11:01,523 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1231, PETRI_PLACES=144, PETRI_TRANSITIONS=262} [2021-10-15 19:11:01,524 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -51 predicate places. [2021-10-15 19:11:01,524 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 262 transitions, 1231 flow [2021-10-15 19:11:01,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:01,524 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:11:01,525 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] [2021-10-15 19:11:01,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:11:01,525 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:11:01,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:01,526 INFO L82 PathProgramCache]: Analyzing trace with hash 2123843848, now seen corresponding path program 1 times [2021-10-15 19:11:01,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:01,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508273218] [2021-10-15 19:11:01,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:01,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:01,669 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 19:11:01,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:01,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508273218] [2021-10-15 19:11:01,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508273218] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:11:01,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297708028] [2021-10-15 19:11:01,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:01,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:11:01,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:11:01,677 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:11:01,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:11:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:01,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:11:01,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:11:02,258 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 19:11:02,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297708028] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:11:02,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:11:02,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:11:02,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415203225] [2021-10-15 19:11:02,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:11:02,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:02,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:11:02,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:11:02,264 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:11:02,264 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 262 transitions, 1231 flow. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 19:11:02,264 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:11:02,265 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:11:02,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:11:02,907 INFO L129 PetriNetUnfolder]: 176/1358 cut-off events. [2021-10-15 19:11:02,907 INFO L130 PetriNetUnfolder]: For 645/645 co-relation queries the response was YES. [2021-10-15 19:11:02,909 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3189 conditions, 1358 events. 176/1358 cut-off events. For 645/645 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 5756 event pairs, 0 based on Foata normal form. 35/1393 useless extension candidates. Maximal degree in co-relation 2293. Up to 892 conditions per place. [2021-10-15 19:11:02,916 INFO L132 encePairwiseOnDemand]: 280/327 looper letters, 371 selfloop transitions, 50 changer transitions 10/437 dead transitions. [2021-10-15 19:11:02,916 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 437 transitions, 2739 flow [2021-10-15 19:11:02,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:11:02,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:11:02,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2021-10-15 19:11:02,919 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38328236493374107 [2021-10-15 19:11:02,919 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2021-10-15 19:11:02,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2021-10-15 19:11:02,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:11:02,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2021-10-15 19:11:02,922 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 19:11:02,925 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 19:11:02,926 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 19:11:02,926 INFO L186 Difference]: Start difference. First operand has 144 places, 262 transitions, 1231 flow. Second operand 3 states and 376 transitions. [2021-10-15 19:11:02,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 437 transitions, 2739 flow [2021-10-15 19:11:02,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 437 transitions, 2606 flow, removed 56 selfloop flow, removed 2 redundant places. [2021-10-15 19:11:02,955 INFO L242 Difference]: Finished difference. Result has 145 places, 300 transitions, 1766 flow [2021-10-15 19:11:02,956 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1766, PETRI_PLACES=145, PETRI_TRANSITIONS=300} [2021-10-15 19:11:02,956 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -50 predicate places. [2021-10-15 19:11:02,957 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 300 transitions, 1766 flow [2021-10-15 19:11:02,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 19:11:02,957 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:11:02,958 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:11:02,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:11:03,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-10-15 19:11:03,186 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:11:03,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:03,186 INFO L82 PathProgramCache]: Analyzing trace with hash 644801539, now seen corresponding path program 1 times [2021-10-15 19:11:03,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:03,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351074736] [2021-10-15 19:11:03,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:03,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:11:03,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:03,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351074736] [2021-10-15 19:11:03,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351074736] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:11:03,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180524636] [2021-10-15 19:11:03,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:03,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:11:03,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:11:03,260 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:11:03,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:11:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:03,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:11:03,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:11:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:11:03,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180524636] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:11:03,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:11:03,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:11:03,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010552351] [2021-10-15 19:11:03,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:11:03,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:03,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:11:03,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:11:03,844 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:11:03,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 300 transitions, 1766 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 19:11:03,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:11:03,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:11:03,845 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:11:04,720 INFO L129 PetriNetUnfolder]: 247/1953 cut-off events. [2021-10-15 19:11:04,721 INFO L130 PetriNetUnfolder]: For 1492/1492 co-relation queries the response was YES. [2021-10-15 19:11:04,723 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4738 conditions, 1953 events. 247/1953 cut-off events. For 1492/1492 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 9988 event pairs, 0 based on Foata normal form. 57/2010 useless extension candidates. Maximal degree in co-relation 2738. Up to 987 conditions per place. [2021-10-15 19:11:04,733 INFO L132 encePairwiseOnDemand]: 282/327 looper letters, 382 selfloop transitions, 113 changer transitions 7/508 dead transitions. [2021-10-15 19:11:04,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 508 transitions, 3778 flow [2021-10-15 19:11:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:11:04,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:11:04,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2021-10-15 19:11:04,737 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37920489296636084 [2021-10-15 19:11:04,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2021-10-15 19:11:04,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2021-10-15 19:11:04,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:11:04,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2021-10-15 19:11:04,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 19:11:04,742 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 19:11:04,743 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 19:11:04,743 INFO L186 Difference]: Start difference. First operand has 145 places, 300 transitions, 1766 flow. Second operand 3 states and 372 transitions. [2021-10-15 19:11:04,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 508 transitions, 3778 flow [2021-10-15 19:11:04,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 508 transitions, 3482 flow, removed 74 selfloop flow, removed 2 redundant places. [2021-10-15 19:11:04,792 INFO L242 Difference]: Finished difference. Result has 147 places, 374 transitions, 2848 flow [2021-10-15 19:11:04,792 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1506, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2848, PETRI_PLACES=147, PETRI_TRANSITIONS=374} [2021-10-15 19:11:04,793 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -48 predicate places. [2021-10-15 19:11:04,793 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 374 transitions, 2848 flow [2021-10-15 19:11:04,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 19:11:04,793 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:11:04,794 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:11:04,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:11:05,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:11:05,016 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:11:05,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:05,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1963549498, now seen corresponding path program 1 times [2021-10-15 19:11:05,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:05,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390377729] [2021-10-15 19:11:05,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:05,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:11:05,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:05,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390377729] [2021-10-15 19:11:05,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390377729] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:11:05,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:11:05,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:11:05,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347742028] [2021-10-15 19:11:05,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:11:05,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:05,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:11:05,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:11:05,095 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:11:05,096 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 374 transitions, 2848 flow. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 19:11:05,096 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:11:05,096 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:11:05,096 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:11:06,036 INFO L129 PetriNetUnfolder]: 256/2093 cut-off events. [2021-10-15 19:11:06,036 INFO L130 PetriNetUnfolder]: For 2085/2085 co-relation queries the response was YES. [2021-10-15 19:11:06,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5239 conditions, 2093 events. 256/2093 cut-off events. For 2085/2085 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11129 event pairs, 0 based on Foata normal form. 25/2118 useless extension candidates. Maximal degree in co-relation 4158. Up to 1593 conditions per place. [2021-10-15 19:11:06,049 INFO L132 encePairwiseOnDemand]: 297/327 looper letters, 444 selfloop transitions, 67 changer transitions 0/517 dead transitions. [2021-10-15 19:11:06,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 517 transitions, 4262 flow [2021-10-15 19:11:06,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:11:06,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:11:06,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2021-10-15 19:11:06,052 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3598369011213048 [2021-10-15 19:11:06,052 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2021-10-15 19:11:06,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2021-10-15 19:11:06,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:11:06,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2021-10-15 19:11:06,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states 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 19:11:06,057 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 19:11:06,059 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 19:11:06,059 INFO L186 Difference]: Start difference. First operand has 147 places, 374 transitions, 2848 flow. Second operand 3 states and 353 transitions. [2021-10-15 19:11:06,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 517 transitions, 4262 flow [2021-10-15 19:11:06,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 517 transitions, 3898 flow, removed 64 selfloop flow, removed 2 redundant places. [2021-10-15 19:11:06,096 INFO L242 Difference]: Finished difference. Result has 149 places, 390 transitions, 2954 flow [2021-10-15 19:11:06,097 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2494, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2954, PETRI_PLACES=149, PETRI_TRANSITIONS=390} [2021-10-15 19:11:06,097 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -46 predicate places. [2021-10-15 19:11:06,101 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 390 transitions, 2954 flow [2021-10-15 19:11:06,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 19:11:06,101 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:11:06,102 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:11:06,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:11:06,102 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:11:06,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:06,103 INFO L82 PathProgramCache]: Analyzing trace with hash 712915108, now seen corresponding path program 1 times [2021-10-15 19:11:06,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:06,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879966079] [2021-10-15 19:11:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:06,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-15 19:11:06,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:06,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879966079] [2021-10-15 19:11:06,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879966079] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:11:06,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:11:06,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:11:06,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065551459] [2021-10-15 19:11:06,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:11:06,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:06,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:11:06,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:11:06,178 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:11:06,178 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 390 transitions, 2954 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:06,179 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:11:06,181 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:11:06,181 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:11:07,278 INFO L129 PetriNetUnfolder]: 326/2687 cut-off events. [2021-10-15 19:11:07,278 INFO L130 PetriNetUnfolder]: For 2439/2439 co-relation queries the response was YES. [2021-10-15 19:11:07,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6694 conditions, 2687 events. 326/2687 cut-off events. For 2439/2439 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 15992 event pairs, 0 based on Foata normal form. 3/2690 useless extension candidates. Maximal degree in co-relation 3980. Up to 2013 conditions per place. [2021-10-15 19:11:07,329 INFO L132 encePairwiseOnDemand]: 283/327 looper letters, 451 selfloop transitions, 130 changer transitions 0/587 dead transitions. [2021-10-15 19:11:07,329 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 587 transitions, 5106 flow [2021-10-15 19:11:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:11:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:11:07,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2021-10-15 19:11:07,333 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3761467889908257 [2021-10-15 19:11:07,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2021-10-15 19:11:07,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2021-10-15 19:11:07,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:11:07,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2021-10-15 19:11:07,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states 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 19:11:07,338 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 19:11:07,339 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 19:11:07,339 INFO L186 Difference]: Start difference. First operand has 149 places, 390 transitions, 2954 flow. Second operand 3 states and 369 transitions. [2021-10-15 19:11:07,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 587 transitions, 5106 flow [2021-10-15 19:11:07,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 587 transitions, 4874 flow, removed 27 selfloop flow, removed 2 redundant places. [2021-10-15 19:11:07,375 INFO L242 Difference]: Finished difference. Result has 151 places, 460 transitions, 4124 flow [2021-10-15 19:11:07,376 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2778, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4124, PETRI_PLACES=151, PETRI_TRANSITIONS=460} [2021-10-15 19:11:07,377 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -44 predicate places. [2021-10-15 19:11:07,377 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 460 transitions, 4124 flow [2021-10-15 19:11:07,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:07,378 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:11:07,378 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:11:07,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:11:07,379 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:11:07,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:07,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1892191701, now seen corresponding path program 1 times [2021-10-15 19:11:07,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:07,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234448546] [2021-10-15 19:11:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:07,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:07,478 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-15 19:11:07,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:07,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234448546] [2021-10-15 19:11:07,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234448546] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:11:07,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:11:07,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:11:07,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212859847] [2021-10-15 19:11:07,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:11:07,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:07,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:11:07,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:11:07,483 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:11:07,483 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 460 transitions, 4124 flow. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 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 19:11:07,483 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:11:07,483 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:11:07,484 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:11:09,053 INFO L129 PetriNetUnfolder]: 339/2962 cut-off events. [2021-10-15 19:11:09,053 INFO L130 PetriNetUnfolder]: For 3618/3618 co-relation queries the response was YES. [2021-10-15 19:11:09,058 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7500 conditions, 2962 events. 339/2962 cut-off events. For 3618/3618 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 18186 event pairs, 0 based on Foata normal form. 19/2981 useless extension candidates. Maximal degree in co-relation 4534. Up to 1861 conditions per place. [2021-10-15 19:11:09,073 INFO L132 encePairwiseOnDemand]: 287/327 looper letters, 569 selfloop transitions, 152 changer transitions 0/727 dead transitions. [2021-10-15 19:11:09,073 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 727 transitions, 6192 flow [2021-10-15 19:11:09,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:11:09,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:11:09,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 515 transitions. [2021-10-15 19:11:09,077 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3937308868501529 [2021-10-15 19:11:09,077 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 515 transitions. [2021-10-15 19:11:09,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 515 transitions. [2021-10-15 19:11:09,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:11:09,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 515 transitions. [2021-10-15 19:11:09,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:09,084 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 19:11:09,085 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 19:11:09,085 INFO L186 Difference]: Start difference. First operand has 151 places, 460 transitions, 4124 flow. Second operand 4 states and 515 transitions. [2021-10-15 19:11:09,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 727 transitions, 6192 flow [2021-10-15 19:11:09,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 727 transitions, 5802 flow, removed 59 selfloop flow, removed 2 redundant places. [2021-10-15 19:11:09,129 INFO L242 Difference]: Finished difference. Result has 154 places, 473 transitions, 4420 flow [2021-10-15 19:11:09,130 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=3554, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4420, PETRI_PLACES=154, PETRI_TRANSITIONS=473} [2021-10-15 19:11:09,130 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -41 predicate places. [2021-10-15 19:11:09,130 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 473 transitions, 4420 flow [2021-10-15 19:11:09,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 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 19:11:09,131 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:11:09,131 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-15 19:11:09,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:11:09,131 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:11:09,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:09,132 INFO L82 PathProgramCache]: Analyzing trace with hash 101584918, now seen corresponding path program 1 times [2021-10-15 19:11:09,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:09,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77257279] [2021-10-15 19:11:09,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:09,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 66 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:11:09,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:09,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77257279] [2021-10-15 19:11:09,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77257279] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:11:09,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885788209] [2021-10-15 19:11:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:09,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:11:09,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:11:09,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:11:09,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:11:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:09,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:11:09,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:11:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-15 19:11:10,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885788209] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:11:10,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:11:10,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:11:10,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923053376] [2021-10-15 19:11:10,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:11:10,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:10,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:11:10,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:11:10,050 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:11:10,050 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 473 transitions, 4420 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 19:11:10,050 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:11:10,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:11:10,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:11:11,402 INFO L129 PetriNetUnfolder]: 393/3671 cut-off events. [2021-10-15 19:11:11,402 INFO L130 PetriNetUnfolder]: For 5131/5131 co-relation queries the response was YES. [2021-10-15 19:11:11,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9296 conditions, 3671 events. 393/3671 cut-off events. For 5131/5131 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 24801 event pairs, 0 based on Foata normal form. 70/3741 useless extension candidates. Maximal degree in co-relation 7671. Up to 2152 conditions per place. [2021-10-15 19:11:11,427 INFO L132 encePairwiseOnDemand]: 284/327 looper letters, 517 selfloop transitions, 131 changer transitions 0/654 dead transitions. [2021-10-15 19:11:11,428 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 654 transitions, 6627 flow [2021-10-15 19:11:11,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:11:11,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:11:11,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2021-10-15 19:11:11,430 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3761467889908257 [2021-10-15 19:11:11,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2021-10-15 19:11:11,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2021-10-15 19:11:11,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:11:11,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2021-10-15 19:11:11,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states 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 19:11:11,436 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 19:11:11,436 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 19:11:11,437 INFO L186 Difference]: Start difference. First operand has 154 places, 473 transitions, 4420 flow. Second operand 3 states and 369 transitions. [2021-10-15 19:11:11,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 654 transitions, 6627 flow [2021-10-15 19:11:11,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 654 transitions, 6627 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:11:11,485 INFO L242 Difference]: Finished difference. Result has 158 places, 527 transitions, 5849 flow [2021-10-15 19:11:11,486 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=4308, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5849, PETRI_PLACES=158, PETRI_TRANSITIONS=527} [2021-10-15 19:11:11,486 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -37 predicate places. [2021-10-15 19:11:11,486 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 527 transitions, 5849 flow [2021-10-15 19:11:11,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 19:11:11,487 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:11:11,487 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:11:11,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:11:11,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:11:11,702 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:11:11,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:11,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1219695243, now seen corresponding path program 1 times [2021-10-15 19:11:11,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:11,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292317120] [2021-10-15 19:11:11,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:11,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-15 19:11:11,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:11,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292317120] [2021-10-15 19:11:11,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292317120] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:11:11,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:11:11,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:11:11,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218893304] [2021-10-15 19:11:11,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:11:11,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:11,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:11:11,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:11:11,783 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:11:11,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 527 transitions, 5849 flow. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 19:11:11,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:11:11,784 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:11:11,784 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:11:13,395 INFO L129 PetriNetUnfolder]: 377/3655 cut-off events. [2021-10-15 19:11:13,395 INFO L130 PetriNetUnfolder]: For 6356/6356 co-relation queries the response was YES. [2021-10-15 19:11:13,401 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9571 conditions, 3655 events. 377/3655 cut-off events. For 6356/6356 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 24370 event pairs, 0 based on Foata normal form. 16/3671 useless extension candidates. Maximal degree in co-relation 7903. Up to 2009 conditions per place. [2021-10-15 19:11:13,415 INFO L132 encePairwiseOnDemand]: 294/327 looper letters, 566 selfloop transitions, 193 changer transitions 0/765 dead transitions. [2021-10-15 19:11:13,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 765 transitions, 7684 flow [2021-10-15 19:11:13,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:11:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:11:13,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 520 transitions. [2021-10-15 19:11:13,418 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.39755351681957185 [2021-10-15 19:11:13,418 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 520 transitions. [2021-10-15 19:11:13,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 520 transitions. [2021-10-15 19:11:13,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:11:13,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 520 transitions. [2021-10-15 19:11:13,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:11:13,423 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 19:11:13,424 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 19:11:13,424 INFO L186 Difference]: Start difference. First operand has 158 places, 527 transitions, 5849 flow. Second operand 4 states and 520 transitions. [2021-10-15 19:11:13,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 765 transitions, 7684 flow [2021-10-15 19:11:13,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 765 transitions, 7416 flow, removed 10 selfloop flow, removed 2 redundant places. [2021-10-15 19:11:13,481 INFO L242 Difference]: Finished difference. Result has 159 places, 511 transitions, 5776 flow [2021-10-15 19:11:13,482 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=5390, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5776, PETRI_PLACES=159, PETRI_TRANSITIONS=511} [2021-10-15 19:11:13,482 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -36 predicate places. [2021-10-15 19:11:13,482 INFO L470 AbstractCegarLoop]: Abstraction has has 159 places, 511 transitions, 5776 flow [2021-10-15 19:11:13,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 19:11:13,483 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:11:13,483 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:11:13,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:11:13,484 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:11:13,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:11:13,484 INFO L82 PathProgramCache]: Analyzing trace with hash -908696778, now seen corresponding path program 1 times [2021-10-15 19:11:13,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:11:13,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712582414] [2021-10-15 19:11:13,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:13,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:11:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 120 proven. 6 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-15 19:11:13,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:11:13,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712582414] [2021-10-15 19:11:13,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712582414] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:11:13,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694827893] [2021-10-15 19:11:13,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:11:13,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:11:13,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:11:13,569 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:11:13,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:11:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:11:13,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:11:13,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:11:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-15 19:11:14,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694827893] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:11:14,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:11:14,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:11:14,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392928700] [2021-10-15 19:11:14,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:11:14,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:11:14,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:11:14,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:11:14,432 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:11:14,432 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 511 transitions, 5776 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 19:11:14,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:11:14,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:11:14,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:11:15,603 INFO L129 PetriNetUnfolder]: 317/3593 cut-off events. [2021-10-15 19:11:15,603 INFO L130 PetriNetUnfolder]: For 6484/6484 co-relation queries the response was YES. [2021-10-15 19:11:15,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9103 conditions, 3593 events. 317/3593 cut-off events. For 6484/6484 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 24300 event pairs, 0 based on Foata normal form. 61/3654 useless extension candidates. Maximal degree in co-relation 7444. Up to 1960 conditions per place. [2021-10-15 19:11:15,609 INFO L132 encePairwiseOnDemand]: 295/327 looper letters, 0 selfloop transitions, 0 changer transitions 576/576 dead transitions. [2021-10-15 19:11:15,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 576 transitions, 6256 flow [2021-10-15 19:11:15,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:11:15,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:11:15,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2021-10-15 19:11:15,611 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36187563710499493 [2021-10-15 19:11:15,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2021-10-15 19:11:15,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2021-10-15 19:11:15,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:11:15,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2021-10-15 19:11:15,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 19:11:15,616 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 19:11:15,616 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 19:11:15,616 INFO L186 Difference]: Start difference. First operand has 159 places, 511 transitions, 5776 flow. Second operand 3 states and 355 transitions. [2021-10-15 19:11:15,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 576 transitions, 6256 flow [2021-10-15 19:11:15,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 576 transitions, 6089 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:11:15,648 INFO L242 Difference]: Finished difference. Result has 158 places, 0 transitions, 0 flow [2021-10-15 19:11:15,649 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=4693, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=158, PETRI_TRANSITIONS=0} [2021-10-15 19:11:15,649 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -37 predicate places. [2021-10-15 19:11:15,650 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 0 transitions, 0 flow [2021-10-15 19:11:15,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 19:11:15,652 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:11:15,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:11:15,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 19:11:15,869 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:11:15,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:11:15 BoogieIcfgContainer [2021-10-15 19:11:15,872 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:11:15,873 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:11:15,873 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:11:15,873 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:11:15,874 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:10:57" (3/4) ... [2021-10-15 19:11:15,876 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:11:15,897 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:11:15,898 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:11:15,899 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:11:15,901 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:11:16,007 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:11:16,008 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:11:16,009 INFO L168 Benchmark]: Toolchain (without parser) took 20491.91 ms. Allocated memory was 104.9 MB in the beginning and 299.9 MB in the end (delta: 195.0 MB). Free memory was 61.9 MB in the beginning and 132.4 MB in the end (delta: -70.5 MB). Peak memory consumption was 126.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:16,010 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 104.9 MB. Free memory is still 80.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:11:16,010 INFO L168 Benchmark]: CACSL2BoogieTranslator took 643.35 ms. Allocated memory is still 104.9 MB. Free memory was 61.7 MB in the beginning and 62.4 MB in the end (delta: -676.9 kB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:16,010 INFO L168 Benchmark]: Boogie Procedure Inliner took 124.81 ms. Allocated memory is still 104.9 MB. Free memory was 62.4 MB in the beginning and 57.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:16,011 INFO L168 Benchmark]: Boogie Preprocessor took 78.41 ms. Allocated memory is still 104.9 MB. Free memory was 56.6 MB in the beginning and 52.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:16,011 INFO L168 Benchmark]: RCFGBuilder took 1289.72 ms. Allocated memory was 104.9 MB in the beginning and 127.9 MB in the end (delta: 23.1 MB). Free memory was 52.4 MB in the beginning and 62.0 MB in the end (delta: -9.6 MB). Peak memory consumption was 26.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:16,012 INFO L168 Benchmark]: TraceAbstraction took 18197.93 ms. Allocated memory was 127.9 MB in the beginning and 299.9 MB in the end (delta: 172.0 MB). Free memory was 61.3 MB in the beginning and 146.5 MB in the end (delta: -85.2 MB). Peak memory consumption was 87.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:16,012 INFO L168 Benchmark]: Witness Printer took 134.96 ms. Allocated memory is still 299.9 MB. Free memory was 146.5 MB in the beginning and 132.4 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:11:16,014 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 104.9 MB. Free memory is still 80.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 643.35 ms. Allocated memory is still 104.9 MB. Free memory was 61.7 MB in the beginning and 62.4 MB in the end (delta: -676.9 kB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 124.81 ms. Allocated memory is still 104.9 MB. Free memory was 62.4 MB in the beginning and 57.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 78.41 ms. Allocated memory is still 104.9 MB. Free memory was 56.6 MB in the beginning and 52.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1289.72 ms. Allocated memory was 104.9 MB in the beginning and 127.9 MB in the end (delta: 23.1 MB). Free memory was 52.4 MB in the beginning and 62.0 MB in the end (delta: -9.6 MB). Peak memory consumption was 26.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18197.93 ms. Allocated memory was 127.9 MB in the beginning and 299.9 MB in the end (delta: 172.0 MB). Free memory was 61.3 MB in the beginning and 146.5 MB in the end (delta: -85.2 MB). Peak memory consumption was 87.3 MB. Max. memory is 16.1 GB. * Witness Printer took 134.96 ms. Allocated memory is still 299.9 MB. Free memory was 146.5 MB in the beginning and 132.4 MB in the end (delta: 14.1 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: 504]: 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: 31.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 18088.8ms, OverallIterations: 11, TraceHistogramMax: 5, EmptinessCheckTime: 0.0ms, AutomataDifference: 12561.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 145.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 894 SDtfs, 1165 SDslu, 0 SDs, 0 SdLazy, 4351 SolverSat, 557 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4106.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 676 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5849occurred in iteration=9, InterpolantAutomatonStates: 36, 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: 191.3ms SsaConstructionTime, 608.0ms SatisfiabilityAnalysisTime, 2955.9ms InterpolantComputationTime, 2295 NumberOfCodeBlocks, 2295 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 2280 ConstructedInterpolants, 0 QuantifiedInterpolants, 6926 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1289 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 15 InterpolantComputations, 11 PerfectInterpolantSequences, 970/1011 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 19:11:16,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9c3318-1e14-4d14-84f1-e512a9313025/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...