./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label46.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_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/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_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label46.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/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_5165bca8-0846-493f-9e2d-e4780dcf124d/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 3f83959aec6dac2930f68b7df14b6587f62827dd ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:24:54,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:24:54,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:24:54,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:24:54,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:24:54,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:24:54,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:24:54,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:24:54,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:24:54,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:24:54,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:24:54,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:24:54,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:24:54,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:24:54,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:24:54,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:24:54,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:24:54,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:24:54,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:24:54,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:24:54,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:24:54,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:24:54,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:24:54,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:24:54,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:24:54,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:24:54,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:24:54,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:24:54,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:24:54,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:24:54,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:24:54,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:24:54,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:24:54,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:24:54,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:24:54,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:24:54,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:24:54,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:24:54,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:24:54,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:24:54,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:24:54,148 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:24:54,174 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:24:54,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:24:54,175 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:24:54,175 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:24:54,176 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:24:54,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:24:54,177 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:24:54,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:24:54,178 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:24:54,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:24:54,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:24:54,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:24:54,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:24:54,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:24:54,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:24:54,179 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:24:54,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:24:54,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:24:54,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:24:54,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:24:54,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:24:54,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:24:54,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:24:54,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:24:54,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:24:54,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:24:54,182 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:24:54,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:24:54,182 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:24:54,183 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:24:54,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:24:54,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:24:54,183 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_5165bca8-0846-493f-9e2d-e4780dcf124d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f83959aec6dac2930f68b7df14b6587f62827dd [2021-10-15 19:24:54,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:24:54,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:24:54,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:24:54,439 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:24:54,440 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:24:54,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem14_label46.c [2021-10-15 19:24:54,509 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/data/5caef961f/df85c487fad44db4bb4ab5f3499eb355/FLAGf9e062c35 [2021-10-15 19:24:55,133 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:24:55,134 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/sv-benchmarks/c/eca-rers2012/Problem14_label46.c [2021-10-15 19:24:55,155 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/data/5caef961f/df85c487fad44db4bb4ab5f3499eb355/FLAGf9e062c35 [2021-10-15 19:24:55,412 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/data/5caef961f/df85c487fad44db4bb4ab5f3499eb355 [2021-10-15 19:24:55,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:24:55,418 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:24:55,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:24:55,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:24:55,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:24:55,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:24:55" (1/1) ... [2021-10-15 19:24:55,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c5aa7cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:55, skipping insertion in model container [2021-10-15 19:24:55,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:24:55" (1/1) ... [2021-10-15 19:24:55,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:24:55,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:24:55,799 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_5165bca8-0846-493f-9e2d-e4780dcf124d/sv-benchmarks/c/eca-rers2012/Problem14_label46.c[4146,4159] [2021-10-15 19:24:56,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:24:56,072 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:24:56,106 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_5165bca8-0846-493f-9e2d-e4780dcf124d/sv-benchmarks/c/eca-rers2012/Problem14_label46.c[4146,4159] [2021-10-15 19:24:56,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:24:56,235 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:24:56,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:56 WrapperNode [2021-10-15 19:24:56,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:24:56,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:24:56,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:24:56,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:24:56,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:56" (1/1) ... [2021-10-15 19:24:56,280 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:56" (1/1) ... [2021-10-15 19:24:56,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:24:56,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:24:56,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:24:56,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:24:56,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:56" (1/1) ... [2021-10-15 19:24:56,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:56" (1/1) ... [2021-10-15 19:24:56,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:56" (1/1) ... [2021-10-15 19:24:56,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:56" (1/1) ... [2021-10-15 19:24:56,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:56" (1/1) ... [2021-10-15 19:24:56,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:56" (1/1) ... [2021-10-15 19:24:56,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:56" (1/1) ... [2021-10-15 19:24:56,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:24:56,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:24:56,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:24:56,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:24:56,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:56" (1/1) ... [2021-10-15 19:24:56,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:24:56,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:24:56,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:24:56,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:24:56,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:24:56,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:24:56,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:24:56,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:24:58,017 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:24:58,018 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:24:58,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:24:58 BoogieIcfgContainer [2021-10-15 19:24:58,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:24:58,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:24:58,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:24:58,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:24:58,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:24:55" (1/3) ... [2021-10-15 19:24:58,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f74e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:24:58, skipping insertion in model container [2021-10-15 19:24:58,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:24:56" (2/3) ... [2021-10-15 19:24:58,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f74e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:24:58, skipping insertion in model container [2021-10-15 19:24:58,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:24:58" (3/3) ... [2021-10-15 19:24:58,032 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label46.c [2021-10-15 19:24:58,037 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:24:58,038 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:24:58,098 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:24:58,106 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 19:24:58,107 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:24:58,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 245 places, 422 transitions, 844 flow [2021-10-15 19:24:58,220 INFO L129 PetriNetUnfolder]: 178/422 cut-off events. [2021-10-15 19:24:58,221 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:24:58,223 INFO L84 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 422 events. 178/422 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 249 event pairs, 0 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2021-10-15 19:24:58,223 INFO L82 GeneralOperation]: Start removeDead. Operand has 245 places, 422 transitions, 844 flow [2021-10-15 19:24:58,241 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 417 transitions, 834 flow [2021-10-15 19:24:58,256 INFO L129 PetriNetUnfolder]: 35/109 cut-off events. [2021-10-15 19:24:58,256 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:24:58,257 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:24:58,257 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] [2021-10-15 19:24:58,258 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:24:58,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:24:58,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1453294289, now seen corresponding path program 1 times [2021-10-15 19:24:58,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:24:58,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82676392] [2021-10-15 19:24:58,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:24:58,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:24:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:24:58,568 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 19:24:58,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:24:58,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82676392] [2021-10-15 19:24:58,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82676392] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:24:58,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:24:58,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:24:58,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754232705] [2021-10-15 19:24:58,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:24:58,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:24:58,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:24:58,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:24:58,600 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:24:58,603 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 417 transitions, 834 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:24:58,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:24:58,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:24:58,605 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:00,468 INFO L129 PetriNetUnfolder]: 282/881 cut-off events. [2021-10-15 19:25:00,469 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:25:00,472 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1753 conditions, 881 events. 282/881 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1015 event pairs, 0 based on Foata normal form. 63/600 useless extension candidates. Maximal degree in co-relation 1. Up to 477 conditions per place. [2021-10-15 19:25:00,482 INFO L132 encePairwiseOnDemand]: 185/422 looper letters, 640 selfloop transitions, 127 changer transitions 103/875 dead transitions. [2021-10-15 19:25:00,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 875 transitions, 3490 flow [2021-10-15 19:25:00,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:25:00,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:25:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1146 transitions. [2021-10-15 19:25:00,508 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6789099526066351 [2021-10-15 19:25:00,509 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1146 transitions. [2021-10-15 19:25:00,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1146 transitions. [2021-10-15 19:25:00,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:00,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1146 transitions. [2021-10-15 19:25:00,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 286.5) internal successors, (1146), 4 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:00,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:00,539 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:00,541 INFO L186 Difference]: Start difference. First operand has 242 places, 417 transitions, 834 flow. Second operand 4 states and 1146 transitions. [2021-10-15 19:25:00,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 875 transitions, 3490 flow [2021-10-15 19:25:00,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 875 transitions, 3490 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:25:00,582 INFO L242 Difference]: Finished difference. Result has 248 places, 422 transitions, 1788 flow [2021-10-15 19:25:00,584 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1788, PETRI_PLACES=248, PETRI_TRANSITIONS=422} [2021-10-15 19:25:00,585 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 6 predicate places. [2021-10-15 19:25:00,586 INFO L470 AbstractCegarLoop]: Abstraction has has 248 places, 422 transitions, 1788 flow [2021-10-15 19:25:00,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:00,586 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:00,587 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:25:00,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:25:00,588 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:00,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:00,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1976295897, now seen corresponding path program 1 times [2021-10-15 19:25:00,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:00,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293460562] [2021-10-15 19:25:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:00,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-15 19:25:00,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:00,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293460562] [2021-10-15 19:25:00,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293460562] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:00,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:25:00,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:25:00,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031277467] [2021-10-15 19:25:00,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:25:00,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:00,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:25:00,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:25:00,773 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:25:00,773 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 422 transitions, 1788 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:00,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:00,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:25:00,774 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:01,820 INFO L129 PetriNetUnfolder]: 253/968 cut-off events. [2021-10-15 19:25:01,820 INFO L130 PetriNetUnfolder]: For 331/331 co-relation queries the response was YES. [2021-10-15 19:25:01,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2417 conditions, 968 events. 253/968 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1115 event pairs, 0 based on Foata normal form. 102/1070 useless extension candidates. Maximal degree in co-relation 1310. Up to 759 conditions per place. [2021-10-15 19:25:01,830 INFO L132 encePairwiseOnDemand]: 307/422 looper letters, 497 selfloop transitions, 107 changer transitions 0/609 dead transitions. [2021-10-15 19:25:01,831 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 609 transitions, 3406 flow [2021-10-15 19:25:01,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:25:01,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:25:01,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2021-10-15 19:25:01,835 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47709320695102686 [2021-10-15 19:25:01,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2021-10-15 19:25:01,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2021-10-15 19:25:01,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:01,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2021-10-15 19:25:01,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:01,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:01,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:01,849 INFO L186 Difference]: Start difference. First operand has 248 places, 422 transitions, 1788 flow. Second operand 3 states and 604 transitions. [2021-10-15 19:25:01,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 609 transitions, 3406 flow [2021-10-15 19:25:01,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 609 transitions, 3406 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:25:01,894 INFO L242 Difference]: Finished difference. Result has 192 places, 434 transitions, 2430 flow [2021-10-15 19:25:01,896 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2430, PETRI_PLACES=192, PETRI_TRANSITIONS=434} [2021-10-15 19:25:01,903 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -50 predicate places. [2021-10-15 19:25:01,903 INFO L470 AbstractCegarLoop]: Abstraction has has 192 places, 434 transitions, 2430 flow [2021-10-15 19:25:01,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:01,904 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:01,904 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:25:01,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:25:01,905 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:01,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:01,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1989656586, now seen corresponding path program 1 times [2021-10-15 19:25:01,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:01,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235392181] [2021-10-15 19:25:01,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:01,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 19:25:02,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:02,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235392181] [2021-10-15 19:25:02,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235392181] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:02,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:25:02,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:25:02,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564215243] [2021-10-15 19:25:02,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:25:02,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:02,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:25:02,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:25:02,167 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:25:02,168 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 434 transitions, 2430 flow. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:02,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:02,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:25:02,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:03,389 INFO L129 PetriNetUnfolder]: 288/1388 cut-off events. [2021-10-15 19:25:03,389 INFO L130 PetriNetUnfolder]: For 1167/1167 co-relation queries the response was YES. [2021-10-15 19:25:03,391 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3625 conditions, 1388 events. 288/1388 cut-off events. For 1167/1167 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1581 event pairs, 0 based on Foata normal form. 98/1486 useless extension candidates. Maximal degree in co-relation 2140. Up to 676 conditions per place. [2021-10-15 19:25:03,427 INFO L132 encePairwiseOnDemand]: 343/422 looper letters, 499 selfloop transitions, 9 changer transitions 157/670 dead transitions. [2021-10-15 19:25:03,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 670 transitions, 4400 flow [2021-10-15 19:25:03,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:25:03,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:25:03,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 591 transitions. [2021-10-15 19:25:03,431 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.35011848341232227 [2021-10-15 19:25:03,431 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 591 transitions. [2021-10-15 19:25:03,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 591 transitions. [2021-10-15 19:25:03,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:03,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 591 transitions. [2021-10-15 19:25:03,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:03,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:03,440 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:03,441 INFO L186 Difference]: Start difference. First operand has 192 places, 434 transitions, 2430 flow. Second operand 4 states and 591 transitions. [2021-10-15 19:25:03,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 670 transitions, 4400 flow [2021-10-15 19:25:03,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 670 transitions, 4002 flow, removed 92 selfloop flow, removed 2 redundant places. [2021-10-15 19:25:03,479 INFO L242 Difference]: Finished difference. Result has 195 places, 336 transitions, 1561 flow [2021-10-15 19:25:03,479 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2032, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1561, PETRI_PLACES=195, PETRI_TRANSITIONS=336} [2021-10-15 19:25:03,480 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -47 predicate places. [2021-10-15 19:25:03,480 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 336 transitions, 1561 flow [2021-10-15 19:25:03,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:03,481 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:03,481 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:25:03,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:25:03,482 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:03,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:03,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1545432834, now seen corresponding path program 1 times [2021-10-15 19:25:03,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:03,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121590555] [2021-10-15 19:25:03,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:03,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 174 proven. 130 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-15 19:25:03,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:03,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121590555] [2021-10-15 19:25:03,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121590555] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:25:03,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261637914] [2021-10-15 19:25:03,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:03,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:25:03,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:25:03,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:25:03,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:25:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:04,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:25:04,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:25:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2021-10-15 19:25:05,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261637914] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:05,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:25:05,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 19:25:05,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442701552] [2021-10-15 19:25:05,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:25:05,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:05,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:25:05,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:25:05,108 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:25:05,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 336 transitions, 1561 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 19:25:05,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:05,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:25:05,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:06,370 INFO L129 PetriNetUnfolder]: 216/1821 cut-off events. [2021-10-15 19:25:06,371 INFO L130 PetriNetUnfolder]: For 895/895 co-relation queries the response was YES. [2021-10-15 19:25:06,373 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4251 conditions, 1821 events. 216/1821 cut-off events. For 895/895 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3816 event pairs, 0 based on Foata normal form. 91/1912 useless extension candidates. Maximal degree in co-relation 3101. Up to 986 conditions per place. [2021-10-15 19:25:06,382 INFO L132 encePairwiseOnDemand]: 346/422 looper letters, 451 selfloop transitions, 115 changer transitions 0/571 dead transitions. [2021-10-15 19:25:06,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 571 transitions, 3520 flow [2021-10-15 19:25:06,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:25:06,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:25:06,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2021-10-15 19:25:06,385 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41627172195892576 [2021-10-15 19:25:06,385 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2021-10-15 19:25:06,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2021-10-15 19:25:06,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:06,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2021-10-15 19:25:06,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:06,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:06,393 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:06,393 INFO L186 Difference]: Start difference. First operand has 195 places, 336 transitions, 1561 flow. Second operand 3 states and 527 transitions. [2021-10-15 19:25:06,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 571 transitions, 3520 flow [2021-10-15 19:25:06,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 571 transitions, 3408 flow, removed 50 selfloop flow, removed 2 redundant places. [2021-10-15 19:25:06,416 INFO L242 Difference]: Finished difference. Result has 196 places, 396 transitions, 2580 flow [2021-10-15 19:25:06,417 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2580, PETRI_PLACES=196, PETRI_TRANSITIONS=396} [2021-10-15 19:25:06,417 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -46 predicate places. [2021-10-15 19:25:06,417 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 396 transitions, 2580 flow [2021-10-15 19:25:06,418 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 19:25:06,418 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:06,419 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:25:06,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:25:06,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:25:06,647 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:06,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:06,648 INFO L82 PathProgramCache]: Analyzing trace with hash 560605277, now seen corresponding path program 1 times [2021-10-15 19:25:06,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:06,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391301750] [2021-10-15 19:25:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:06,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 565 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-10-15 19:25:06,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:06,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391301750] [2021-10-15 19:25:06,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391301750] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:06,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:25:06,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:25:06,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741695725] [2021-10-15 19:25:06,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:25:06,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:06,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:25:06,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:25:06,885 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:25:06,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 396 transitions, 2580 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:06,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:06,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:25:06,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:08,403 INFO L129 PetriNetUnfolder]: 265/2404 cut-off events. [2021-10-15 19:25:08,403 INFO L130 PetriNetUnfolder]: For 2472/2472 co-relation queries the response was YES. [2021-10-15 19:25:08,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5874 conditions, 2404 events. 265/2404 cut-off events. For 2472/2472 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 6819 event pairs, 0 based on Foata normal form. 101/2505 useless extension candidates. Maximal degree in co-relation 4254. Up to 1651 conditions per place. [2021-10-15 19:25:08,417 INFO L132 encePairwiseOnDemand]: 345/422 looper letters, 549 selfloop transitions, 66 changer transitions 0/620 dead transitions. [2021-10-15 19:25:08,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 620 transitions, 4654 flow [2021-10-15 19:25:08,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:25:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:25:08,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2021-10-15 19:25:08,421 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41627172195892576 [2021-10-15 19:25:08,421 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2021-10-15 19:25:08,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2021-10-15 19:25:08,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:08,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2021-10-15 19:25:08,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:08,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:08,429 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:08,429 INFO L186 Difference]: Start difference. First operand has 196 places, 396 transitions, 2580 flow. Second operand 3 states and 527 transitions. [2021-10-15 19:25:08,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 620 transitions, 4654 flow [2021-10-15 19:25:08,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 620 transitions, 4368 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:25:08,459 INFO L242 Difference]: Finished difference. Result has 197 places, 445 transitions, 3268 flow [2021-10-15 19:25:08,459 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2350, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3268, PETRI_PLACES=197, PETRI_TRANSITIONS=445} [2021-10-15 19:25:08,460 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -45 predicate places. [2021-10-15 19:25:08,460 INFO L470 AbstractCegarLoop]: Abstraction has has 197 places, 445 transitions, 3268 flow [2021-10-15 19:25:08,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:08,461 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:08,461 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:25:08,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:25:08,462 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:08,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:08,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1453668839, now seen corresponding path program 1 times [2021-10-15 19:25:08,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:08,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851683083] [2021-10-15 19:25:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:08,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 554 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-10-15 19:25:08,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:08,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851683083] [2021-10-15 19:25:08,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851683083] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:08,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:25:08,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:25:08,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128831310] [2021-10-15 19:25:08,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:25:08,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:08,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:25:08,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:25:08,632 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:25:08,633 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 445 transitions, 3268 flow. Second operand has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 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 19:25:08,633 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:08,633 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:25:08,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:10,475 INFO L129 PetriNetUnfolder]: 278/2773 cut-off events. [2021-10-15 19:25:10,475 INFO L130 PetriNetUnfolder]: For 2207/2207 co-relation queries the response was YES. [2021-10-15 19:25:10,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6777 conditions, 2773 events. 278/2773 cut-off events. For 2207/2207 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8812 event pairs, 0 based on Foata normal form. 6/2779 useless extension candidates. Maximal degree in co-relation 6027. Up to 1830 conditions per place. [2021-10-15 19:25:10,490 INFO L132 encePairwiseOnDemand]: 407/422 looper letters, 777 selfloop transitions, 27 changer transitions 0/809 dead transitions. [2021-10-15 19:25:10,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 809 transitions, 5724 flow [2021-10-15 19:25:10,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:25:10,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:25:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 655 transitions. [2021-10-15 19:25:10,495 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38803317535545023 [2021-10-15 19:25:10,496 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 655 transitions. [2021-10-15 19:25:10,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 655 transitions. [2021-10-15 19:25:10,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:10,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 655 transitions. [2021-10-15 19:25:10,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.75) internal successors, (655), 4 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:10,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:10,503 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:10,503 INFO L186 Difference]: Start difference. First operand has 197 places, 445 transitions, 3268 flow. Second operand 4 states and 655 transitions. [2021-10-15 19:25:10,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 809 transitions, 5724 flow [2021-10-15 19:25:10,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 809 transitions, 5614 flow, removed 21 selfloop flow, removed 1 redundant places. [2021-10-15 19:25:10,580 INFO L242 Difference]: Finished difference. Result has 202 places, 454 transitions, 3390 flow [2021-10-15 19:25:10,581 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=3160, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3390, PETRI_PLACES=202, PETRI_TRANSITIONS=454} [2021-10-15 19:25:10,581 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -40 predicate places. [2021-10-15 19:25:10,582 INFO L470 AbstractCegarLoop]: Abstraction has has 202 places, 454 transitions, 3390 flow [2021-10-15 19:25:10,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 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 19:25:10,582 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:10,583 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:25:10,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:25:10,583 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:10,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:10,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1503435120, now seen corresponding path program 1 times [2021-10-15 19:25:10,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:10,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33768192] [2021-10-15 19:25:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:10,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 701 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-10-15 19:25:10,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:10,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33768192] [2021-10-15 19:25:10,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33768192] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:10,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:25:10,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:25:10,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170081633] [2021-10-15 19:25:10,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:25:10,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:10,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:25:10,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:25:10,826 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:25:10,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 454 transitions, 3390 flow. Second operand has 4 states, 4 states have (on average 67.75) internal successors, (271), 4 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:10,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:10,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:25:10,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:12,719 INFO L129 PetriNetUnfolder]: 288/3019 cut-off events. [2021-10-15 19:25:12,719 INFO L130 PetriNetUnfolder]: For 2470/2470 co-relation queries the response was YES. [2021-10-15 19:25:12,723 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7320 conditions, 3019 events. 288/3019 cut-off events. For 2470/2470 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 10382 event pairs, 0 based on Foata normal form. 2/3021 useless extension candidates. Maximal degree in co-relation 6560. Up to 2653 conditions per place. [2021-10-15 19:25:12,735 INFO L132 encePairwiseOnDemand]: 392/422 looper letters, 541 selfloop transitions, 17 changer transitions 103/666 dead transitions. [2021-10-15 19:25:12,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 666 transitions, 5260 flow [2021-10-15 19:25:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:25:12,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:25:12,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 497 transitions. [2021-10-15 19:25:12,739 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2944312796208531 [2021-10-15 19:25:12,739 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 497 transitions. [2021-10-15 19:25:12,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 497 transitions. [2021-10-15 19:25:12,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:12,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 497 transitions. [2021-10-15 19:25:12,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:12,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:12,747 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:12,747 INFO L186 Difference]: Start difference. First operand has 202 places, 454 transitions, 3390 flow. Second operand 4 states and 497 transitions. [2021-10-15 19:25:12,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 666 transitions, 5260 flow [2021-10-15 19:25:12,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 666 transitions, 5254 flow, removed 3 selfloop flow, removed 0 redundant places. [2021-10-15 19:25:12,777 INFO L242 Difference]: Finished difference. Result has 208 places, 388 transitions, 2770 flow [2021-10-15 19:25:12,778 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=3384, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2770, PETRI_PLACES=208, PETRI_TRANSITIONS=388} [2021-10-15 19:25:12,778 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -34 predicate places. [2021-10-15 19:25:12,779 INFO L470 AbstractCegarLoop]: Abstraction has has 208 places, 388 transitions, 2770 flow [2021-10-15 19:25:12,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 4 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:12,779 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:12,780 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:25:12,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:25:12,780 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:12,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:12,781 INFO L82 PathProgramCache]: Analyzing trace with hash -145271439, now seen corresponding path program 2 times [2021-10-15 19:25:12,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:12,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015589387] [2021-10-15 19:25:12,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:12,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 779 proven. 11 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-10-15 19:25:13,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:13,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015589387] [2021-10-15 19:25:13,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015589387] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:25:13,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682900061] [2021-10-15 19:25:13,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:25:13,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:25:13,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:25:13,139 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:25:13,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:25:13,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:25:13,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:25:13,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:25:13,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:25:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 790 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-10-15 19:25:15,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682900061] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:15,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:25:15,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-10-15 19:25:15,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756440522] [2021-10-15 19:25:15,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:25:15,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:15,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:25:15,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:25:15,884 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:25:15,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 388 transitions, 2770 flow. Second operand has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:15,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:15,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:25:15,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:18,182 INFO L129 PetriNetUnfolder]: 228/3464 cut-off events. [2021-10-15 19:25:18,182 INFO L130 PetriNetUnfolder]: For 2979/2979 co-relation queries the response was YES. [2021-10-15 19:25:18,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7997 conditions, 3464 events. 228/3464 cut-off events. For 2979/2979 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 13852 event pairs, 0 based on Foata normal form. 76/3540 useless extension candidates. Maximal degree in co-relation 7592. Up to 1935 conditions per place. [2021-10-15 19:25:18,199 INFO L132 encePairwiseOnDemand]: 363/422 looper letters, 720 selfloop transitions, 57 changer transitions 0/782 dead transitions. [2021-10-15 19:25:18,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 782 transitions, 5284 flow [2021-10-15 19:25:18,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:25:18,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:25:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 717 transitions. [2021-10-15 19:25:18,219 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.33981042654028437 [2021-10-15 19:25:18,219 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 717 transitions. [2021-10-15 19:25:18,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 717 transitions. [2021-10-15 19:25:18,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:18,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 717 transitions. [2021-10-15 19:25:18,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:18,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:18,228 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:18,229 INFO L186 Difference]: Start difference. First operand has 208 places, 388 transitions, 2770 flow. Second operand 5 states and 717 transitions. [2021-10-15 19:25:18,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 782 transitions, 5284 flow [2021-10-15 19:25:18,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 782 transitions, 5224 flow, removed 13 selfloop flow, removed 3 redundant places. [2021-10-15 19:25:18,261 INFO L242 Difference]: Finished difference. Result has 211 places, 407 transitions, 3305 flow [2021-10-15 19:25:18,262 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3305, PETRI_PLACES=211, PETRI_TRANSITIONS=407} [2021-10-15 19:25:18,262 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -31 predicate places. [2021-10-15 19:25:18,262 INFO L470 AbstractCegarLoop]: Abstraction has has 211 places, 407 transitions, 3305 flow [2021-10-15 19:25:18,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:18,263 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:18,263 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:25:18,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:25:18,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:25:18,491 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:18,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:18,491 INFO L82 PathProgramCache]: Analyzing trace with hash 823062922, now seen corresponding path program 1 times [2021-10-15 19:25:18,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:18,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123726658] [2021-10-15 19:25:18,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:18,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-10-15 19:25:18,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:18,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123726658] [2021-10-15 19:25:18,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123726658] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:18,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:25:18,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:25:18,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396581433] [2021-10-15 19:25:18,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:25:18,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:18,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:25:18,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:25:18,726 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:25:18,726 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 407 transitions, 3305 flow. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:18,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:18,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:25:18,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:20,710 INFO L129 PetriNetUnfolder]: 277/4225 cut-off events. [2021-10-15 19:25:20,710 INFO L130 PetriNetUnfolder]: For 4763/4763 co-relation queries the response was YES. [2021-10-15 19:25:20,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9960 conditions, 4225 events. 277/4225 cut-off events. For 4763/4763 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 19240 event pairs, 0 based on Foata normal form. 70/4295 useless extension candidates. Maximal degree in co-relation 9549. Up to 2626 conditions per place. [2021-10-15 19:25:20,728 INFO L132 encePairwiseOnDemand]: 364/422 looper letters, 511 selfloop transitions, 115 changer transitions 0/631 dead transitions. [2021-10-15 19:25:20,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 631 transitions, 5571 flow [2021-10-15 19:25:20,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:25:20,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:25:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2021-10-15 19:25:20,741 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38783570300157977 [2021-10-15 19:25:20,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2021-10-15 19:25:20,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2021-10-15 19:25:20,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:20,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2021-10-15 19:25:20,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:20,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:20,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:20,748 INFO L186 Difference]: Start difference. First operand has 211 places, 407 transitions, 3305 flow. Second operand 3 states and 491 transitions. [2021-10-15 19:25:20,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 631 transitions, 5571 flow [2021-10-15 19:25:20,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 631 transitions, 5548 flow, removed 4 selfloop flow, removed 1 redundant places. [2021-10-15 19:25:20,779 INFO L242 Difference]: Finished difference. Result has 214 places, 456 transitions, 4612 flow [2021-10-15 19:25:20,780 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=3022, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4612, PETRI_PLACES=214, PETRI_TRANSITIONS=456} [2021-10-15 19:25:20,780 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -28 predicate places. [2021-10-15 19:25:20,780 INFO L470 AbstractCegarLoop]: Abstraction has has 214 places, 456 transitions, 4612 flow [2021-10-15 19:25:20,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:20,781 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:20,781 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-10-15 19:25:20,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:25:20,782 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:20,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:20,782 INFO L82 PathProgramCache]: Analyzing trace with hash -2111047309, now seen corresponding path program 1 times [2021-10-15 19:25:20,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:20,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403375791] [2021-10-15 19:25:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:20,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 806 proven. 195 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-10-15 19:25:21,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:21,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403375791] [2021-10-15 19:25:21,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403375791] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:25:21,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469308005] [2021-10-15 19:25:21,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:21,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:25:21,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:25:21,074 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:25:21,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:25:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:21,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:25:21,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:25:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 959 trivial. 0 not checked. [2021-10-15 19:25:23,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469308005] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:23,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:25:23,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 19:25:23,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430215839] [2021-10-15 19:25:23,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:25:23,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:23,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:25:23,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:25:23,331 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:25:23,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 456 transitions, 4612 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:23,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:23,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:25:23,332 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:25,843 INFO L129 PetriNetUnfolder]: 308/4790 cut-off events. [2021-10-15 19:25:25,843 INFO L130 PetriNetUnfolder]: For 7496/7496 co-relation queries the response was YES. [2021-10-15 19:25:25,849 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11633 conditions, 4790 events. 308/4790 cut-off events. For 7496/7496 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 23106 event pairs, 0 based on Foata normal form. 57/4847 useless extension candidates. Maximal degree in co-relation 11219. Up to 3590 conditions per place. [2021-10-15 19:25:25,858 INFO L132 encePairwiseOnDemand]: 364/422 looper letters, 546 selfloop transitions, 111 changer transitions 0/662 dead transitions. [2021-10-15 19:25:25,858 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 662 transitions, 6780 flow [2021-10-15 19:25:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:25:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:25:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2021-10-15 19:25:25,861 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38783570300157977 [2021-10-15 19:25:25,861 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2021-10-15 19:25:25,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2021-10-15 19:25:25,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:25,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2021-10-15 19:25:25,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:25,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:25,868 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:25,868 INFO L186 Difference]: Start difference. First operand has 214 places, 456 transitions, 4612 flow. Second operand 3 states and 491 transitions. [2021-10-15 19:25:25,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 662 transitions, 6780 flow [2021-10-15 19:25:25,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 662 transitions, 6394 flow, removed 60 selfloop flow, removed 2 redundant places. [2021-10-15 19:25:25,905 INFO L242 Difference]: Finished difference. Result has 216 places, 487 transitions, 5324 flow [2021-10-15 19:25:25,906 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4060, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5324, PETRI_PLACES=216, PETRI_TRANSITIONS=487} [2021-10-15 19:25:25,907 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -26 predicate places. [2021-10-15 19:25:25,907 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 487 transitions, 5324 flow [2021-10-15 19:25:25,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:25,907 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:25,908 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 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] [2021-10-15 19:25:25,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:25:26,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 19:25:26,127 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:26,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:26,128 INFO L82 PathProgramCache]: Analyzing trace with hash -932781460, now seen corresponding path program 1 times [2021-10-15 19:25:26,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:26,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127513688] [2021-10-15 19:25:26,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:26,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 882 proven. 195 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-10-15 19:25:26,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:26,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127513688] [2021-10-15 19:25:26,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127513688] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:25:26,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672294777] [2021-10-15 19:25:26,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:26,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:25:26,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:25:26,487 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:25:26,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:25:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:27,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:25:27,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:25:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 782 proven. 0 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2021-10-15 19:25:31,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672294777] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:31,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:25:31,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 19:25:31,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387566440] [2021-10-15 19:25:31,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:25:31,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:31,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:25:31,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:25:31,272 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:25:31,272 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 487 transitions, 5324 flow. Second operand has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 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 19:25:31,273 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:31,273 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:25:31,273 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:33,739 INFO L129 PetriNetUnfolder]: 278/4818 cut-off events. [2021-10-15 19:25:33,739 INFO L130 PetriNetUnfolder]: For 7157/7157 co-relation queries the response was YES. [2021-10-15 19:25:33,744 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11524 conditions, 4818 events. 278/4818 cut-off events. For 7157/7157 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 22652 event pairs, 0 based on Foata normal form. 30/4848 useless extension candidates. Maximal degree in co-relation 11106. Up to 3330 conditions per place. [2021-10-15 19:25:33,754 INFO L132 encePairwiseOnDemand]: 374/422 looper letters, 482 selfloop transitions, 171 changer transitions 0/658 dead transitions. [2021-10-15 19:25:33,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 658 transitions, 6442 flow [2021-10-15 19:25:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:25:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:25:33,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 491 transitions. [2021-10-15 19:25:33,758 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2908767772511848 [2021-10-15 19:25:33,758 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 491 transitions. [2021-10-15 19:25:33,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 491 transitions. [2021-10-15 19:25:33,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:33,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 491 transitions. [2021-10-15 19:25:33,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:33,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:33,765 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:33,765 INFO L186 Difference]: Start difference. First operand has 216 places, 487 transitions, 5324 flow. Second operand 4 states and 491 transitions. [2021-10-15 19:25:33,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 658 transitions, 6442 flow [2021-10-15 19:25:33,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 658 transitions, 6222 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-10-15 19:25:33,802 INFO L242 Difference]: Finished difference. Result has 216 places, 458 transitions, 4913 flow [2021-10-15 19:25:33,803 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4510, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4913, PETRI_PLACES=216, PETRI_TRANSITIONS=458} [2021-10-15 19:25:33,804 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -26 predicate places. [2021-10-15 19:25:33,804 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 458 transitions, 4913 flow [2021-10-15 19:25:33,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 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 19:25:33,804 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:33,805 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:25:33,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:25:34,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 19:25:34,031 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:34,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:34,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1940762816, now seen corresponding path program 1 times [2021-10-15 19:25:34,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:34,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479285493] [2021-10-15 19:25:34,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:34,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 780 proven. 93 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-10-15 19:25:34,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:34,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479285493] [2021-10-15 19:25:34,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479285493] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:25:34,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289173656] [2021-10-15 19:25:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:34,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:25:34,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:25:34,374 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:25:34,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:25:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:35,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:25:35,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:25:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 873 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-10-15 19:25:36,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289173656] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:36,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:25:36,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 19:25:36,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463527818] [2021-10-15 19:25:36,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:25:36,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:36,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:25:36,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:25:36,845 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:25:36,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 458 transitions, 4913 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:36,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:36,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:25:36,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:39,969 INFO L129 PetriNetUnfolder]: 328/6143 cut-off events. [2021-10-15 19:25:39,969 INFO L130 PetriNetUnfolder]: For 9168/9168 co-relation queries the response was YES. [2021-10-15 19:25:39,977 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14620 conditions, 6143 events. 328/6143 cut-off events. For 9168/9168 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 31795 event pairs, 0 based on Foata normal form. 52/6195 useless extension candidates. Maximal degree in co-relation 14205. Up to 3168 conditions per place. [2021-10-15 19:25:39,991 INFO L132 encePairwiseOnDemand]: 366/422 looper letters, 589 selfloop transitions, 90 changer transitions 0/684 dead transitions. [2021-10-15 19:25:39,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 684 transitions, 7461 flow [2021-10-15 19:25:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:25:39,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:25:39,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2021-10-15 19:25:39,995 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3862559241706161 [2021-10-15 19:25:39,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2021-10-15 19:25:39,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2021-10-15 19:25:39,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:39,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2021-10-15 19:25:39,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:40,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:40,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:40,001 INFO L186 Difference]: Start difference. First operand has 216 places, 458 transitions, 4913 flow. Second operand 3 states and 489 transitions. [2021-10-15 19:25:40,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 684 transitions, 7461 flow [2021-10-15 19:25:40,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 684 transitions, 7298 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-10-15 19:25:40,044 INFO L242 Difference]: Finished difference. Result has 219 places, 499 transitions, 5947 flow [2021-10-15 19:25:40,045 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4775, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=5947, PETRI_PLACES=219, PETRI_TRANSITIONS=499} [2021-10-15 19:25:40,046 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -23 predicate places. [2021-10-15 19:25:40,046 INFO L470 AbstractCegarLoop]: Abstraction has has 219 places, 499 transitions, 5947 flow [2021-10-15 19:25:40,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:40,046 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:40,047 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:25:40,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:25:40,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-15 19:25:40,263 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:40,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:40,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1898901820, now seen corresponding path program 1 times [2021-10-15 19:25:40,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:40,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076825644] [2021-10-15 19:25:40,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:40,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 1334 proven. 155 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-10-15 19:25:40,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:40,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076825644] [2021-10-15 19:25:40,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076825644] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:25:40,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761496137] [2021-10-15 19:25:40,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:40,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:25:40,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:25:40,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:25:40,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:25:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:41,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:25:41,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:25:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 725 proven. 0 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-10-15 19:25:43,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761496137] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:25:43,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:25:43,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 19:25:43,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702512121] [2021-10-15 19:25:43,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:25:43,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:43,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:25:43,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:25:43,431 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:25:43,431 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 499 transitions, 5947 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:43,431 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:43,432 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:25:43,432 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:47,217 INFO L129 PetriNetUnfolder]: 350/6699 cut-off events. [2021-10-15 19:25:47,217 INFO L130 PetriNetUnfolder]: For 10456/10456 co-relation queries the response was YES. [2021-10-15 19:25:47,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16114 conditions, 6699 events. 350/6699 cut-off events. For 10456/10456 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 35701 event pairs, 0 based on Foata normal form. 47/6746 useless extension candidates. Maximal degree in co-relation 15695. Up to 3974 conditions per place. [2021-10-15 19:25:47,240 INFO L132 encePairwiseOnDemand]: 363/422 looper letters, 505 selfloop transitions, 186 changer transitions 0/696 dead transitions. [2021-10-15 19:25:47,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 696 transitions, 8038 flow [2021-10-15 19:25:47,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:25:47,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:25:47,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2021-10-15 19:25:47,244 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38704581358609796 [2021-10-15 19:25:47,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2021-10-15 19:25:47,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2021-10-15 19:25:47,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:47,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2021-10-15 19:25:47,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:47,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:47,251 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:47,251 INFO L186 Difference]: Start difference. First operand has 219 places, 499 transitions, 5947 flow. Second operand 3 states and 490 transitions. [2021-10-15 19:25:47,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 696 transitions, 8038 flow [2021-10-15 19:25:47,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 696 transitions, 7850 flow, removed 4 selfloop flow, removed 2 redundant places. [2021-10-15 19:25:47,300 INFO L242 Difference]: Finished difference. Result has 221 places, 521 transitions, 6972 flow [2021-10-15 19:25:47,301 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=5325, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=6972, PETRI_PLACES=221, PETRI_TRANSITIONS=521} [2021-10-15 19:25:47,301 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -21 predicate places. [2021-10-15 19:25:47,301 INFO L470 AbstractCegarLoop]: Abstraction has has 221 places, 521 transitions, 6972 flow [2021-10-15 19:25:47,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:47,302 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:47,303 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:25:47,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:25:47,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:25:47,531 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:47,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:47,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1777817371, now seen corresponding path program 1 times [2021-10-15 19:25:47,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:47,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666779131] [2021-10-15 19:25:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:47,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1919 backedges. 1413 proven. 155 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-10-15 19:25:47,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:47,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666779131] [2021-10-15 19:25:47,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666779131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:25:47,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709607345] [2021-10-15 19:25:47,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:47,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:25:47,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:25:47,916 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:25:47,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:25:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:49,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:25:49,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:25:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1919 backedges. 1413 proven. 155 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-10-15 19:25:51,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709607345] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:25:51,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:25:51,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-10-15 19:25:51,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938361290] [2021-10-15 19:25:51,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:25:51,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:25:51,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:25:51,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:25:51,432 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:25:51,432 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 521 transitions, 6972 flow. Second operand has 4 states, 4 states have (on average 149.25) internal successors, (597), 4 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 19:25:51,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:25:51,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:25:51,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:25:56,625 INFO L129 PetriNetUnfolder]: 405/8207 cut-off events. [2021-10-15 19:25:56,625 INFO L130 PetriNetUnfolder]: For 15118/15118 co-relation queries the response was YES. [2021-10-15 19:25:56,638 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19944 conditions, 8207 events. 405/8207 cut-off events. For 15118/15118 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 44557 event pairs, 0 based on Foata normal form. 29/8236 useless extension candidates. Maximal degree in co-relation 19520. Up to 3570 conditions per place. [2021-10-15 19:25:56,651 INFO L132 encePairwiseOnDemand]: 373/422 looper letters, 773 selfloop transitions, 155 changer transitions 0/933 dead transitions. [2021-10-15 19:25:56,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 933 transitions, 10747 flow [2021-10-15 19:25:56,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:25:56,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:25:56,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 680 transitions. [2021-10-15 19:25:56,655 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4028436018957346 [2021-10-15 19:25:56,655 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 680 transitions. [2021-10-15 19:25:56,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 680 transitions. [2021-10-15 19:25:56,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:25:56,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 680 transitions. [2021-10-15 19:25:56,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:56,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:56,663 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:25:56,664 INFO L186 Difference]: Start difference. First operand has 221 places, 521 transitions, 6972 flow. Second operand 4 states and 680 transitions. [2021-10-15 19:25:56,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 933 transitions, 10747 flow [2021-10-15 19:25:56,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 933 transitions, 10303 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:25:56,727 INFO L242 Difference]: Finished difference. Result has 225 places, 569 transitions, 8222 flow [2021-10-15 19:25:56,728 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=6600, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=8222, PETRI_PLACES=225, PETRI_TRANSITIONS=569} [2021-10-15 19:25:56,729 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -17 predicate places. [2021-10-15 19:25:56,729 INFO L470 AbstractCegarLoop]: Abstraction has has 225 places, 569 transitions, 8222 flow [2021-10-15 19:25:56,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.25) internal successors, (597), 4 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 19:25:56,729 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:25:56,730 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:25:56,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:25:56,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:25:56,955 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:25:56,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:25:56,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1631092303, now seen corresponding path program 1 times [2021-10-15 19:25:56,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:25:56,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048356338] [2021-10-15 19:25:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:56,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:25:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 1613 proven. 93 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2021-10-15 19:25:57,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:25:57,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048356338] [2021-10-15 19:25:57,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048356338] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:25:57,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940738204] [2021-10-15 19:25:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:25:57,480 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:25:57,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:25:57,483 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:25:57,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 19:25:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:25:59,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:25:59,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:26:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 1706 proven. 0 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2021-10-15 19:26:01,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940738204] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:26:01,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:26:01,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 19:26:01,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567559429] [2021-10-15 19:26:01,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:26:01,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:26:01,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:26:01,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:26:01,413 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:26:01,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 569 transitions, 8222 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:01,413 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:26:01,413 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:26:01,414 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:26:07,276 INFO L129 PetriNetUnfolder]: 406/8415 cut-off events. [2021-10-15 19:26:07,276 INFO L130 PetriNetUnfolder]: For 15509/15509 co-relation queries the response was YES. [2021-10-15 19:26:07,291 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20520 conditions, 8415 events. 406/8415 cut-off events. For 15509/15509 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 45967 event pairs, 0 based on Foata normal form. 3/8418 useless extension candidates. Maximal degree in co-relation 20093. Up to 6195 conditions per place. [2021-10-15 19:26:07,302 INFO L132 encePairwiseOnDemand]: 402/422 looper letters, 660 selfloop transitions, 85 changer transitions 0/750 dead transitions. [2021-10-15 19:26:07,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 750 transitions, 10155 flow [2021-10-15 19:26:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:26:07,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:26:07,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2021-10-15 19:26:07,305 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.35624012638230645 [2021-10-15 19:26:07,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2021-10-15 19:26:07,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2021-10-15 19:26:07,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:26:07,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2021-10-15 19:26:07,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:07,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:07,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:07,309 INFO L186 Difference]: Start difference. First operand has 225 places, 569 transitions, 8222 flow. Second operand 3 states and 451 transitions. [2021-10-15 19:26:07,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 750 transitions, 10155 flow [2021-10-15 19:26:07,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 750 transitions, 10155 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:26:07,368 INFO L242 Difference]: Finished difference. Result has 228 places, 567 transitions, 8446 flow [2021-10-15 19:26:07,369 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=8163, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=8446, PETRI_PLACES=228, PETRI_TRANSITIONS=567} [2021-10-15 19:26:07,369 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -14 predicate places. [2021-10-15 19:26:07,369 INFO L470 AbstractCegarLoop]: Abstraction has has 228 places, 567 transitions, 8446 flow [2021-10-15 19:26:07,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:07,370 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:26:07,371 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:26:07,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-15 19:26:07,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:26:07,587 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:26:07,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:26:07,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1968132824, now seen corresponding path program 1 times [2021-10-15 19:26:07,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:26:07,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036646548] [2021-10-15 19:26:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:26:07,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:26:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:26:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1948 trivial. 0 not checked. [2021-10-15 19:26:08,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:26:08,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036646548] [2021-10-15 19:26:08,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036646548] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:26:08,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:26:08,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:26:08,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669355815] [2021-10-15 19:26:08,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:26:08,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:26:08,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:26:08,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:26:08,101 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:26:08,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 567 transitions, 8446 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:08,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:26:08,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:26:08,102 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:26:13,611 INFO L129 PetriNetUnfolder]: 352/8183 cut-off events. [2021-10-15 19:26:13,611 INFO L130 PetriNetUnfolder]: For 16955/16955 co-relation queries the response was YES. [2021-10-15 19:26:13,624 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19639 conditions, 8183 events. 352/8183 cut-off events. For 16955/16955 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 42469 event pairs, 0 based on Foata normal form. 52/8235 useless extension candidates. Maximal degree in co-relation 19205. Up to 6586 conditions per place. [2021-10-15 19:26:13,633 INFO L132 encePairwiseOnDemand]: 374/422 looper letters, 583 selfloop transitions, 100 changer transitions 0/688 dead transitions. [2021-10-15 19:26:13,634 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 688 transitions, 9030 flow [2021-10-15 19:26:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:26:13,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:26:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2021-10-15 19:26:13,637 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37519747235387046 [2021-10-15 19:26:13,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2021-10-15 19:26:13,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2021-10-15 19:26:13,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:26:13,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2021-10-15 19:26:13,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:13,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:13,641 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:13,641 INFO L186 Difference]: Start difference. First operand has 228 places, 567 transitions, 8446 flow. Second operand 3 states and 475 transitions. [2021-10-15 19:26:13,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 688 transitions, 9030 flow [2021-10-15 19:26:13,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 688 transitions, 8952 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:26:13,683 INFO L242 Difference]: Finished difference. Result has 229 places, 513 transitions, 7434 flow [2021-10-15 19:26:13,683 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=7234, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7434, PETRI_PLACES=229, PETRI_TRANSITIONS=513} [2021-10-15 19:26:13,684 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -13 predicate places. [2021-10-15 19:26:13,684 INFO L470 AbstractCegarLoop]: Abstraction has has 229 places, 513 transitions, 7434 flow [2021-10-15 19:26:13,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:13,684 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:26:13,685 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:26:13,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 19:26:13,685 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:26:13,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:26:13,686 INFO L82 PathProgramCache]: Analyzing trace with hash -387054434, now seen corresponding path program 1 times [2021-10-15 19:26:13,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:26:13,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578592142] [2021-10-15 19:26:13,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:26:13,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:26:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:26:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3057 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 2762 trivial. 0 not checked. [2021-10-15 19:26:14,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:26:14,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578592142] [2021-10-15 19:26:14,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578592142] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:26:14,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:26:14,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:26:14,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209866850] [2021-10-15 19:26:14,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:26:14,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:26:14,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:26:14,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:26:14,134 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:26:14,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 513 transitions, 7434 flow. Second operand has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:14,134 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:26:14,135 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:26:14,135 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:26:19,356 INFO L129 PetriNetUnfolder]: 342/8035 cut-off events. [2021-10-15 19:26:19,357 INFO L130 PetriNetUnfolder]: For 14739/14739 co-relation queries the response was YES. [2021-10-15 19:26:19,377 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19347 conditions, 8035 events. 342/8035 cut-off events. For 14739/14739 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 41618 event pairs, 0 based on Foata normal form. 2/8037 useless extension candidates. Maximal degree in co-relation 18915. Up to 7667 conditions per place. [2021-10-15 19:26:19,388 INFO L132 encePairwiseOnDemand]: 409/422 looper letters, 658 selfloop transitions, 12 changer transitions 21/696 dead transitions. [2021-10-15 19:26:19,388 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 696 transitions, 9026 flow [2021-10-15 19:26:19,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:26:19,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:26:19,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 468 transitions. [2021-10-15 19:26:19,391 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2772511848341232 [2021-10-15 19:26:19,391 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 468 transitions. [2021-10-15 19:26:19,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 468 transitions. [2021-10-15 19:26:19,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:26:19,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 468 transitions. [2021-10-15 19:26:19,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:19,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:19,395 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:19,395 INFO L186 Difference]: Start difference. First operand has 229 places, 513 transitions, 7434 flow. Second operand 4 states and 468 transitions. [2021-10-15 19:26:19,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 696 transitions, 9026 flow [2021-10-15 19:26:19,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 696 transitions, 8929 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:26:19,457 INFO L242 Difference]: Finished difference. Result has 232 places, 500 transitions, 7102 flow [2021-10-15 19:26:19,458 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=7163, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=7102, PETRI_PLACES=232, PETRI_TRANSITIONS=500} [2021-10-15 19:26:19,458 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -10 predicate places. [2021-10-15 19:26:19,459 INFO L470 AbstractCegarLoop]: Abstraction has has 232 places, 500 transitions, 7102 flow [2021-10-15 19:26:19,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:19,459 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:26:19,460 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:26:19,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-15 19:26:19,460 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:26:19,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:26:19,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1310024199, now seen corresponding path program 1 times [2021-10-15 19:26:19,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:26:19,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915912853] [2021-10-15 19:26:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:26:19,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:26:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:26:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3529 backedges. 2476 proven. 72 refuted. 0 times theorem prover too weak. 981 trivial. 0 not checked. [2021-10-15 19:26:19,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:26:19,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915912853] [2021-10-15 19:26:19,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915912853] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:26:19,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720793336] [2021-10-15 19:26:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:26:19,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:26:19,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:26:19,975 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:26:20,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 19:26:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:26:21,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:26:21,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:26:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3529 backedges. 2189 proven. 0 refuted. 0 times theorem prover too weak. 1340 trivial. 0 not checked. [2021-10-15 19:26:24,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720793336] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:26:24,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:26:24,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-10-15 19:26:24,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442255944] [2021-10-15 19:26:24,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:26:24,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:26:24,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:26:24,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:26:24,131 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:26:24,132 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 500 transitions, 7102 flow. Second operand has 4 states, 4 states have (on average 137.75) internal successors, (551), 4 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:24,132 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:26:24,132 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:26:24,132 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:26:31,146 INFO L129 PetriNetUnfolder]: 379/9336 cut-off events. [2021-10-15 19:26:31,146 INFO L130 PetriNetUnfolder]: For 17359/17359 co-relation queries the response was YES. [2021-10-15 19:26:31,161 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22301 conditions, 9336 events. 379/9336 cut-off events. For 17359/17359 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 46962 event pairs, 0 based on Foata normal form. 22/9358 useless extension candidates. Maximal degree in co-relation 21866. Up to 5626 conditions per place. [2021-10-15 19:26:31,174 INFO L132 encePairwiseOnDemand]: 373/422 looper letters, 745 selfloop transitions, 149 changer transitions 0/899 dead transitions. [2021-10-15 19:26:31,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 899 transitions, 10627 flow [2021-10-15 19:26:31,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:26:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:26:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 680 transitions. [2021-10-15 19:26:31,184 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4028436018957346 [2021-10-15 19:26:31,184 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 680 transitions. [2021-10-15 19:26:31,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 680 transitions. [2021-10-15 19:26:31,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:26:31,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 680 transitions. [2021-10-15 19:26:31,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:31,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:31,190 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:31,190 INFO L186 Difference]: Start difference. First operand has 232 places, 500 transitions, 7102 flow. Second operand 4 states and 680 transitions. [2021-10-15 19:26:31,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 899 transitions, 10627 flow [2021-10-15 19:26:31,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 899 transitions, 10581 flow, removed 11 selfloop flow, removed 3 redundant places. [2021-10-15 19:26:31,239 INFO L242 Difference]: Finished difference. Result has 234 places, 535 transitions, 8502 flow [2021-10-15 19:26:31,239 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=8502, PETRI_PLACES=234, PETRI_TRANSITIONS=535} [2021-10-15 19:26:31,239 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -8 predicate places. [2021-10-15 19:26:31,239 INFO L470 AbstractCegarLoop]: Abstraction has has 234 places, 535 transitions, 8502 flow [2021-10-15 19:26:31,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.75) internal successors, (551), 4 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:31,240 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:26:31,241 INFO L254 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:26:31,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-15 19:26:31,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:26:31,451 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:26:31,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:26:31,452 INFO L82 PathProgramCache]: Analyzing trace with hash 126987919, now seen corresponding path program 1 times [2021-10-15 19:26:31,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:26:31,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421768834] [2021-10-15 19:26:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:26:31,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:26:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:26:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5983 backedges. 406 proven. 0 refuted. 0 times theorem prover too weak. 5577 trivial. 0 not checked. [2021-10-15 19:26:32,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:26:32,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421768834] [2021-10-15 19:26:32,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421768834] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:26:32,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:26:32,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:26:32,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783715858] [2021-10-15 19:26:32,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:26:32,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:26:32,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:26:32,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:26:32,018 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:26:32,019 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 535 transitions, 8502 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:32,019 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:26:32,019 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:26:32,019 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:26:39,028 INFO L129 PetriNetUnfolder]: 353/9310 cut-off events. [2021-10-15 19:26:39,029 INFO L130 PetriNetUnfolder]: For 19808/19808 co-relation queries the response was YES. [2021-10-15 19:26:39,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22249 conditions, 9310 events. 353/9310 cut-off events. For 19808/19808 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 46548 event pairs, 0 based on Foata normal form. 26/9336 useless extension candidates. Maximal degree in co-relation 21811. Up to 5667 conditions per place. [2021-10-15 19:26:39,057 INFO L132 encePairwiseOnDemand]: 371/422 looper letters, 493 selfloop transitions, 186 changer transitions 0/684 dead transitions. [2021-10-15 19:26:39,057 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 684 transitions, 9615 flow [2021-10-15 19:26:39,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:26:39,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:26:39,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2021-10-15 19:26:39,060 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3736176935229068 [2021-10-15 19:26:39,060 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2021-10-15 19:26:39,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2021-10-15 19:26:39,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:26:39,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2021-10-15 19:26:39,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:39,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:39,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:39,063 INFO L186 Difference]: Start difference. First operand has 234 places, 535 transitions, 8502 flow. Second operand 3 states and 473 transitions. [2021-10-15 19:26:39,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 684 transitions, 9615 flow [2021-10-15 19:26:39,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 684 transitions, 9536 flow, removed 20 selfloop flow, removed 1 redundant places. [2021-10-15 19:26:39,108 INFO L242 Difference]: Finished difference. Result has 235 places, 509 transitions, 8198 flow [2021-10-15 19:26:39,108 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=7826, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=8198, PETRI_PLACES=235, PETRI_TRANSITIONS=509} [2021-10-15 19:26:39,108 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -7 predicate places. [2021-10-15 19:26:39,109 INFO L470 AbstractCegarLoop]: Abstraction has has 235 places, 509 transitions, 8198 flow [2021-10-15 19:26:39,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:39,109 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:26:39,109 INFO L254 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:26:39,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-15 19:26:39,110 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:26:39,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:26:39,110 INFO L82 PathProgramCache]: Analyzing trace with hash 674872807, now seen corresponding path program 1 times [2021-10-15 19:26:39,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:26:39,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319931653] [2021-10-15 19:26:39,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:26:39,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:26:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:26:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7083 backedges. 4482 proven. 252 refuted. 0 times theorem prover too weak. 2349 trivial. 0 not checked. [2021-10-15 19:26:39,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:26:39,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319931653] [2021-10-15 19:26:39,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319931653] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:26:39,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329585933] [2021-10-15 19:26:39,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:26:39,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:26:39,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:26:39,807 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:26:39,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 19:26:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:26:42,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:26:42,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:26:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7083 backedges. 2470 proven. 0 refuted. 0 times theorem prover too weak. 4613 trivial. 0 not checked. [2021-10-15 19:26:45,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329585933] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:26:45,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:26:45,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-10-15 19:26:45,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804894486] [2021-10-15 19:26:45,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:26:45,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:26:45,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:26:45,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:26:45,544 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:26:45,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 509 transitions, 8198 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:45,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:26:45,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:26:45,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:26:52,631 INFO L129 PetriNetUnfolder]: 331/9081 cut-off events. [2021-10-15 19:26:52,631 INFO L130 PetriNetUnfolder]: For 19800/19800 co-relation queries the response was YES. [2021-10-15 19:26:52,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21702 conditions, 9081 events. 331/9081 cut-off events. For 19800/19800 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 35845 event pairs, 0 based on Foata normal form. 16/9097 useless extension candidates. Maximal degree in co-relation 21264. Up to 7801 conditions per place. [2021-10-15 19:26:52,664 INFO L132 encePairwiseOnDemand]: 397/422 looper letters, 601 selfloop transitions, 65 changer transitions 0/671 dead transitions. [2021-10-15 19:26:52,664 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 671 transitions, 9539 flow [2021-10-15 19:26:52,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:26:52,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:26:52,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 455 transitions. [2021-10-15 19:26:52,666 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3593996840442338 [2021-10-15 19:26:52,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 455 transitions. [2021-10-15 19:26:52,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 455 transitions. [2021-10-15 19:26:52,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:26:52,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 455 transitions. [2021-10-15 19:26:52,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:52,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:52,672 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:52,672 INFO L186 Difference]: Start difference. First operand has 235 places, 509 transitions, 8198 flow. Second operand 3 states and 455 transitions. [2021-10-15 19:26:52,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 671 transitions, 9539 flow [2021-10-15 19:26:52,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 671 transitions, 9359 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 19:26:52,726 INFO L242 Difference]: Finished difference. Result has 237 places, 496 transitions, 7882 flow [2021-10-15 19:26:52,727 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=7675, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7882, PETRI_PLACES=237, PETRI_TRANSITIONS=496} [2021-10-15 19:26:52,728 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -5 predicate places. [2021-10-15 19:26:52,728 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 496 transitions, 7882 flow [2021-10-15 19:26:52,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:52,729 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:26:52,730 INFO L254 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:26:52,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:26:52,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:26:52,943 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:26:52,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:26:52,943 INFO L82 PathProgramCache]: Analyzing trace with hash -339858598, now seen corresponding path program 1 times [2021-10-15 19:26:52,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:26:52,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119773813] [2021-10-15 19:26:52,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:26:52,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:26:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:26:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8594 backedges. 4979 proven. 0 refuted. 0 times theorem prover too weak. 3615 trivial. 0 not checked. [2021-10-15 19:26:53,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:26:53,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119773813] [2021-10-15 19:26:53,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119773813] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:26:53,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:26:53,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:26:53,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879595730] [2021-10-15 19:26:53,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:26:53,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:26:53,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:26:53,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:26:53,847 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:26:53,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 496 transitions, 7882 flow. Second operand has 7 states, 7 states have (on average 99.14285714285714) internal successors, (694), 7 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:26:53,848 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:26:53,848 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:26:53,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:27:05,866 INFO L129 PetriNetUnfolder]: 402/12193 cut-off events. [2021-10-15 19:27:05,866 INFO L130 PetriNetUnfolder]: For 29446/29446 co-relation queries the response was YES. [2021-10-15 19:27:05,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28520 conditions, 12193 events. 402/12193 cut-off events. For 29446/29446 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 60686 event pairs, 0 based on Foata normal form. 99/12292 useless extension candidates. Maximal degree in co-relation 28081. Up to 4378 conditions per place. [2021-10-15 19:27:05,917 INFO L132 encePairwiseOnDemand]: 369/422 looper letters, 1017 selfloop transitions, 246 changer transitions 14/1282 dead transitions. [2021-10-15 19:27:05,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 1282 transitions, 13380 flow [2021-10-15 19:27:05,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:27:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:27:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1131 transitions. [2021-10-15 19:27:05,922 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3828706838185511 [2021-10-15 19:27:05,923 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1131 transitions. [2021-10-15 19:27:05,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1131 transitions. [2021-10-15 19:27:05,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:27:05,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1131 transitions. [2021-10-15 19:27:05,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 161.57142857142858) internal successors, (1131), 7 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states 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 19:27:05,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 422.0) internal successors, (3376), 8 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states 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 19:27:05,933 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 422.0) internal successors, (3376), 8 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states 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 19:27:05,933 INFO L186 Difference]: Start difference. First operand has 237 places, 496 transitions, 7882 flow. Second operand 7 states and 1131 transitions. [2021-10-15 19:27:05,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 1282 transitions, 13380 flow [2021-10-15 19:27:05,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 1282 transitions, 13327 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:27:06,006 INFO L242 Difference]: Finished difference. Result has 247 places, 553 transitions, 10078 flow [2021-10-15 19:27:06,007 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=6708, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10078, PETRI_PLACES=247, PETRI_TRANSITIONS=553} [2021-10-15 19:27:06,007 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, 5 predicate places. [2021-10-15 19:27:06,007 INFO L470 AbstractCegarLoop]: Abstraction has has 247 places, 553 transitions, 10078 flow [2021-10-15 19:27:06,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 99.14285714285714) internal successors, (694), 7 states have internal predecessors, (694), 0 states have call successors, (0), 0 states 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 19:27:06,008 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:27:06,008 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 9, 8, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:27:06,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-15 19:27:06,009 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:27:06,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:06,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1276225934, now seen corresponding path program 1 times [2021-10-15 19:27:06,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:06,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402441692] [2021-10-15 19:27:06,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:06,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9575 backedges. 2804 proven. 1045 refuted. 0 times theorem prover too weak. 5726 trivial. 0 not checked. [2021-10-15 19:27:06,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:06,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402441692] [2021-10-15 19:27:06,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402441692] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:27:06,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692978893] [2021-10-15 19:27:06,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:06,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:27:06,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:27:06,940 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:27:06,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 19:27:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:09,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 2137 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:27:09,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:27:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9575 backedges. 3849 proven. 0 refuted. 0 times theorem prover too weak. 5726 trivial. 0 not checked. [2021-10-15 19:27:13,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692978893] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:13,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:27:13,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 19:27:13,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746280098] [2021-10-15 19:27:13,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:27:13,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:13,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:27:13,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:27:13,118 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:27:13,118 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 553 transitions, 10078 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 19:27:13,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:27:13,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:27:13,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:27:25,597 INFO L129 PetriNetUnfolder]: 243/12288 cut-off events. [2021-10-15 19:27:25,597 INFO L130 PetriNetUnfolder]: For 27748/27748 co-relation queries the response was YES. [2021-10-15 19:27:25,631 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27447 conditions, 12288 events. 243/12288 cut-off events. For 27748/27748 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 54457 event pairs, 0 based on Foata normal form. 151/12439 useless extension candidates. Maximal degree in co-relation 27028. Up to 6371 conditions per place. [2021-10-15 19:27:25,640 INFO L132 encePairwiseOnDemand]: 377/422 looper letters, 419 selfloop transitions, 6 changer transitions 156/586 dead transitions. [2021-10-15 19:27:25,640 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 586 transitions, 7848 flow [2021-10-15 19:27:25,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:27:25,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:27:25,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2021-10-15 19:27:25,642 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36018957345971564 [2021-10-15 19:27:25,642 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2021-10-15 19:27:25,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2021-10-15 19:27:25,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:27:25,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2021-10-15 19:27:25,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states 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 19:27:25,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 19:27:25,646 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states 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 19:27:25,646 INFO L186 Difference]: Start difference. First operand has 247 places, 553 transitions, 10078 flow. Second operand 3 states and 456 transitions. [2021-10-15 19:27:25,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 586 transitions, 7848 flow [2021-10-15 19:27:25,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 586 transitions, 7518 flow, removed 18 selfloop flow, removed 12 redundant places. [2021-10-15 19:27:25,688 INFO L242 Difference]: Finished difference. Result has 237 places, 255 transitions, 2145 flow [2021-10-15 19:27:25,688 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=6004, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2145, PETRI_PLACES=237, PETRI_TRANSITIONS=255} [2021-10-15 19:27:25,689 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -5 predicate places. [2021-10-15 19:27:25,689 INFO L470 AbstractCegarLoop]: Abstraction has has 237 places, 255 transitions, 2145 flow [2021-10-15 19:27:25,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 19:27:25,689 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:27:25,690 INFO L254 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 10, 9, 9, 9, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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 19:27:25,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 19:27:25,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:27:25,907 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:27:25,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:25,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1727618608, now seen corresponding path program 1 times [2021-10-15 19:27:25,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:25,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504990477] [2021-10-15 19:27:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:25,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10935 backedges. 2784 proven. 0 refuted. 0 times theorem prover too weak. 8151 trivial. 0 not checked. [2021-10-15 19:27:26,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:26,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504990477] [2021-10-15 19:27:26,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504990477] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:26,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:26,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:27:26,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934366919] [2021-10-15 19:27:26,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:27:26,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:26,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:27:26,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:27:26,806 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:27:26,806 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 255 transitions, 2145 flow. Second operand has 5 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states 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 19:27:26,807 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:27:26,807 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:27:26,807 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:27:32,810 INFO L129 PetriNetUnfolder]: 121/7071 cut-off events. [2021-10-15 19:27:32,811 INFO L130 PetriNetUnfolder]: For 6486/6486 co-relation queries the response was YES. [2021-10-15 19:27:32,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15392 conditions, 7071 events. 121/7071 cut-off events. For 6486/6486 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 22710 event pairs, 0 based on Foata normal form. 1/7072 useless extension candidates. Maximal degree in co-relation 15366. Up to 4811 conditions per place. [2021-10-15 19:27:32,848 INFO L132 encePairwiseOnDemand]: 406/422 looper letters, 604 selfloop transitions, 29 changer transitions 3/641 dead transitions. [2021-10-15 19:27:32,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 641 transitions, 4948 flow [2021-10-15 19:27:32,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:27:32,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:27:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 613 transitions. [2021-10-15 19:27:32,852 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.290521327014218 [2021-10-15 19:27:32,852 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 613 transitions. [2021-10-15 19:27:32,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 613 transitions. [2021-10-15 19:27:32,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:27:32,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 613 transitions. [2021-10-15 19:27:32,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states 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 19:27:32,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states 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 19:27:32,858 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states 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 19:27:32,858 INFO L186 Difference]: Start difference. First operand has 237 places, 255 transitions, 2145 flow. Second operand 5 states and 613 transitions. [2021-10-15 19:27:32,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 641 transitions, 4948 flow [2021-10-15 19:27:32,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 641 transitions, 4808 flow, removed 39 selfloop flow, removed 4 redundant places. [2021-10-15 19:27:32,890 INFO L242 Difference]: Finished difference. Result has 238 places, 274 transitions, 2659 flow [2021-10-15 19:27:32,890 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2033, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2659, PETRI_PLACES=238, PETRI_TRANSITIONS=274} [2021-10-15 19:27:32,890 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -4 predicate places. [2021-10-15 19:27:32,891 INFO L470 AbstractCegarLoop]: Abstraction has has 238 places, 274 transitions, 2659 flow [2021-10-15 19:27:32,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states 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 19:27:32,891 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:27:32,892 INFO L254 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 12, 11, 11, 11, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 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 19:27:32,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-15 19:27:32,893 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:27:32,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:27:32,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2140269625, now seen corresponding path program 1 times [2021-10-15 19:27:32,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:27:32,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234331583] [2021-10-15 19:27:32,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:27:32,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:27:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:27:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 14529 backedges. 3210 proven. 0 refuted. 0 times theorem prover too weak. 11319 trivial. 0 not checked. [2021-10-15 19:27:34,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:27:34,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234331583] [2021-10-15 19:27:34,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234331583] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:27:34,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:27:34,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:27:34,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424830286] [2021-10-15 19:27:34,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:27:34,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:27:34,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:27:34,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:27:34,557 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 422 [2021-10-15 19:27:34,558 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 274 transitions, 2659 flow. Second operand has 4 states, 4 states have (on average 88.75) internal successors, (355), 4 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 19:27:34,558 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:27:34,558 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 422 [2021-10-15 19:27:34,558 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:27:39,816 INFO L129 PetriNetUnfolder]: 119/6889 cut-off events. [2021-10-15 19:27:39,816 INFO L130 PetriNetUnfolder]: For 6247/6247 co-relation queries the response was YES. [2021-10-15 19:27:39,827 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15018 conditions, 6889 events. 119/6889 cut-off events. For 6247/6247 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 21324 event pairs, 0 based on Foata normal form. 1/6890 useless extension candidates. Maximal degree in co-relation 14992. Up to 6588 conditions per place. [2021-10-15 19:27:39,829 INFO L132 encePairwiseOnDemand]: 416/422 looper letters, 0 selfloop transitions, 0 changer transitions 448/448 dead transitions. [2021-10-15 19:27:39,830 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 448 transitions, 3878 flow [2021-10-15 19:27:39,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:27:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:27:39,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 411 transitions. [2021-10-15 19:27:39,831 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.24348341232227488 [2021-10-15 19:27:39,832 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 411 transitions. [2021-10-15 19:27:39,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 411 transitions. [2021-10-15 19:27:39,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:27:39,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 411 transitions. [2021-10-15 19:27:39,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 states 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 19:27:39,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states 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 19:27:39,835 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states 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 19:27:39,835 INFO L186 Difference]: Start difference. First operand has 238 places, 274 transitions, 2659 flow. Second operand 4 states and 411 transitions. [2021-10-15 19:27:39,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 448 transitions, 3878 flow [2021-10-15 19:27:39,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 448 transitions, 3671 flow, removed 93 selfloop flow, removed 5 redundant places. [2021-10-15 19:27:39,851 INFO L242 Difference]: Finished difference. Result has 233 places, 0 transitions, 0 flow [2021-10-15 19:27:39,851 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=233, PETRI_TRANSITIONS=0} [2021-10-15 19:27:39,851 INFO L334 CegarLoopForPetriNet]: 242 programPoint places, -9 predicate places. [2021-10-15 19:27:39,852 INFO L470 AbstractCegarLoop]: Abstraction has has 233 places, 0 transitions, 0 flow [2021-10-15 19:27:39,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 4 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 19:27:39,853 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:27:39,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-15 19:27:39,858 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:27:39,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:27:39 BoogieIcfgContainer [2021-10-15 19:27:39,862 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:27:39,863 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:27:39,863 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:27:39,863 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:27:39,863 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:24:58" (3/4) ... [2021-10-15 19:27:39,865 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:27:39,889 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:27:39,891 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:27:39,893 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:27:39,895 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:27:40,014 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:27:40,015 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:27:40,016 INFO L168 Benchmark]: Toolchain (without parser) took 164597.56 ms. Allocated memory was 107.0 MB in the beginning and 3.5 GB in the end (delta: 3.4 GB). Free memory was 72.2 MB in the beginning and 1.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.8 GB. Max. memory is 16.1 GB. [2021-10-15 19:27:40,017 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 107.0 MB. Free memory is still 62.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:27:40,017 INFO L168 Benchmark]: CACSL2BoogieTranslator took 815.41 ms. Allocated memory is still 107.0 MB. Free memory was 72.2 MB in the beginning and 60.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:27:40,018 INFO L168 Benchmark]: Boogie Procedure Inliner took 149.57 ms. Allocated memory was 107.0 MB in the beginning and 151.0 MB in the end (delta: 44.0 MB). Free memory was 60.3 MB in the beginning and 120.2 MB in the end (delta: -59.9 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:27:40,018 INFO L168 Benchmark]: Boogie Preprocessor took 70.66 ms. Allocated memory is still 151.0 MB. Free memory was 120.2 MB in the beginning and 115.0 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:27:40,019 INFO L168 Benchmark]: RCFGBuilder took 1561.47 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 105.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 67.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:27:40,019 INFO L168 Benchmark]: TraceAbstraction took 161840.40 ms. Allocated memory was 151.0 MB in the beginning and 3.5 GB in the end (delta: 3.3 GB). Free memory was 105.8 MB in the beginning and 1.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.0 GB. Max. memory is 16.1 GB. [2021-10-15 19:27:40,019 INFO L168 Benchmark]: Witness Printer took 152.27 ms. Allocated memory is still 3.5 GB. Free memory was 1.7 GB in the beginning and 1.7 GB in the end (delta: 17.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:27:40,025 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 107.0 MB. Free memory is still 62.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 815.41 ms. Allocated memory is still 107.0 MB. Free memory was 72.2 MB in the beginning and 60.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 149.57 ms. Allocated memory was 107.0 MB in the beginning and 151.0 MB in the end (delta: 44.0 MB). Free memory was 60.3 MB in the beginning and 120.2 MB in the end (delta: -59.9 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 70.66 ms. Allocated memory is still 151.0 MB. Free memory was 120.2 MB in the beginning and 115.0 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1561.47 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 105.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 67.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 161840.40 ms. Allocated memory was 151.0 MB in the beginning and 3.5 GB in the end (delta: 3.3 GB). Free memory was 105.8 MB in the beginning and 1.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.0 GB. Max. memory is 16.1 GB. * Witness Printer took 152.27 ms. Allocated memory is still 3.5 GB. Free memory was 1.7 GB in the beginning and 1.7 GB in the end (delta: 17.8 MB). Peak memory consumption was 18.9 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: 131]: 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, 245 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 9.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 161765.4ms, OverallIterations: 24, TraceHistogramMax: 18, EmptinessCheckTime: 0.0ms, AutomataDifference: 107524.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 139.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2085 SDtfs, 2946 SDslu, 0 SDs, 0 SdLazy, 15052 SolverSat, 1809 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12549.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9633 GetRequests, 9558 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 409.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10078occurred in iteration=21, InterpolantAutomatonStates: 89, 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: 975.1ms SsaConstructionTime, 3487.2ms SatisfiabilityAnalysisTime, 33144.2ms InterpolantComputationTime, 30515 NumberOfCodeBlocks, 30515 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 30480 ConstructedInterpolants, 0 QuantifiedInterpolants, 91548 SizeOfPredicates, 0 NumberOfNonLiveVariables, 12051 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 35 InterpolantComputations, 23 PerfectInterpolantSequences, 110379/112930 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 19:27:40,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5165bca8-0846-493f-9e2d-e4780dcf124d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...