./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/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_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/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 64bit --witnessprinter.graph.data.programhash e10b2441e14d74a50d8506d85f59a648f8fbd39a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:09:28,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:09:28,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:09:28,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:09:28,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:09:28,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:09:28,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:09:28,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:09:28,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:09:28,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:09:28,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:09:28,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:09:28,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:09:28,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:09:28,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:09:28,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:09:28,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:09:28,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:09:28,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:09:28,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:09:28,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:09:28,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:09:28,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:09:28,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:09:28,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:09:28,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:09:28,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:09:28,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:09:28,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:09:28,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:09:28,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:09:28,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:09:28,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:09:28,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:09:28,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:09:28,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:09:28,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:09:28,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:09:28,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:09:28,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:09:28,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:09:28,294 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-10-15 19:09:28,321 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:09:28,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:09:28,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:09:28,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:09:28,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:09:28,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:09:28,329 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:09:28,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:09:28,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:09:28,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:09:28,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:09:28,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:09:28,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:09:28,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:09:28,331 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:09:28,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:09:28,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:09:28,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:09:28,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:09:28,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:09:28,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:09:28,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:09:28,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:09:28,333 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:09:28,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:09:28,334 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:09:28,334 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:09:28,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:09:28,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:09:28,337 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_520d3386-3a37-49b7-a385-857a56a702bd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e10b2441e14d74a50d8506d85f59a648f8fbd39a [2021-10-15 19:09:28,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:09:28,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:09:28,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:09:28,681 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:09:28,685 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:09:28,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i [2021-10-15 19:09:28,772 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/data/54ba46fc3/2ebd42ba64af4384aec213ff3125773f/FLAG7edb61160 [2021-10-15 19:09:29,467 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:09:29,467 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i [2021-10-15 19:09:29,518 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/data/54ba46fc3/2ebd42ba64af4384aec213ff3125773f/FLAG7edb61160 [2021-10-15 19:09:29,735 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/data/54ba46fc3/2ebd42ba64af4384aec213ff3125773f [2021-10-15 19:09:29,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:09:29,743 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:09:29,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:09:29,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:09:29,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:09:29,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:09:29" (1/1) ... [2021-10-15 19:09:29,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba1480d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:29, skipping insertion in model container [2021-10-15 19:09:29,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:09:29" (1/1) ... [2021-10-15 19:09:29,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:09:29,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:09:30,287 WARN L1214 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [1764] [2021-10-15 19:09:30,288 WARN L1214 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [1765-1766] [2021-10-15 19:09:30,402 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i[52456,52469] [2021-10-15 19:09:30,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:09:30,593 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:09:30,656 WARN L1214 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [1764] [2021-10-15 19:09:30,657 WARN L1214 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [1765-1766] [2021-10-15 19:09:30,673 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_520d3386-3a37-49b7-a385-857a56a702bd/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i[52456,52469] [2021-10-15 19:09:30,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:09:30,826 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:09:30,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:30 WrapperNode [2021-10-15 19:09:30,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:09:30,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:09:30,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:09:30,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:09:30,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:30" (1/1) ... [2021-10-15 19:09:30,895 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:30" (1/1) ... [2021-10-15 19:09:31,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:09:31,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:09:31,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:09:31,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:09:31,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:30" (1/1) ... [2021-10-15 19:09:31,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:30" (1/1) ... [2021-10-15 19:09:31,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:30" (1/1) ... [2021-10-15 19:09:31,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:30" (1/1) ... [2021-10-15 19:09:31,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:30" (1/1) ... [2021-10-15 19:09:31,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:30" (1/1) ... [2021-10-15 19:09:31,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:30" (1/1) ... [2021-10-15 19:09:31,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:09:31,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:09:31,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:09:31,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:09:31,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:30" (1/1) ... [2021-10-15 19:09:31,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:09:31,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:09:31,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:09:31,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:09:31,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:09:31,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:09:31,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 19:09:31,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 19:09:31,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:09:31,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 19:09:31,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:09:31,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-15 19:09:31,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:09:31,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:09:31,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:09:33,406 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:09:33,407 INFO L299 CfgBuilder]: Removed 358 assume(true) statements. [2021-10-15 19:09:33,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:09:33 BoogieIcfgContainer [2021-10-15 19:09:33,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:09:33,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:09:33,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:09:33,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:09:33,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:09:29" (1/3) ... [2021-10-15 19:09:33,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b3fb0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:09:33, skipping insertion in model container [2021-10-15 19:09:33,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:09:30" (2/3) ... [2021-10-15 19:09:33,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b3fb0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:09:33, skipping insertion in model container [2021-10-15 19:09:33,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:09:33" (3/3) ... [2021-10-15 19:09:33,423 INFO L111 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i [2021-10-15 19:09:33,433 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:09:33,433 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-10-15 19:09:33,496 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:09:33,503 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 19:09:33,504 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-15 19:09:33,537 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 350 places, 506 transitions, 1012 flow [2021-10-15 19:09:33,660 INFO L129 PetriNetUnfolder]: 157/506 cut-off events. [2021-10-15 19:09:33,666 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:09:33,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 507 conditions, 506 events. 157/506 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2043 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2021-10-15 19:09:33,671 INFO L82 GeneralOperation]: Start removeDead. Operand has 350 places, 506 transitions, 1012 flow [2021-10-15 19:09:33,696 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 313 places, 449 transitions, 898 flow [2021-10-15 19:09:33,709 INFO L129 PetriNetUnfolder]: 66/224 cut-off events. [2021-10-15 19:09:33,709 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:09:33,710 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:09:33,710 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] [2021-10-15 19:09:33,711 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-15 19:09:33,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:33,717 INFO L82 PathProgramCache]: Analyzing trace with hash 519222377, now seen corresponding path program 1 times [2021-10-15 19:09:33,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:33,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425985752] [2021-10-15 19:09:33,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:33,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:34,285 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 19:09:34,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:34,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425985752] [2021-10-15 19:09:34,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425985752] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:34,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:34,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:09:34,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672076695] [2021-10-15 19:09:34,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:09:34,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:34,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:09:34,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:09:34,323 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 483 out of 506 [2021-10-15 19:09:34,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 449 transitions, 898 flow. Second operand has 3 states, 3 states have (on average 484.3333333333333) internal successors, (1453), 3 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:34,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:34,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 483 of 506 [2021-10-15 19:09:34,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:09:35,468 INFO L129 PetriNetUnfolder]: 188/632 cut-off events. [2021-10-15 19:09:35,468 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:09:35,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 632 events. 188/632 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2804 event pairs, 0 based on Foata normal form. 10/451 useless extension candidates. Maximal degree in co-relation 209. Up to 83 conditions per place. [2021-10-15 19:09:35,474 INFO L132 encePairwiseOnDemand]: 490/506 looper letters, 9 selfloop transitions, 3 changer transitions 0/442 dead transitions. [2021-10-15 19:09:35,475 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 442 transitions, 908 flow [2021-10-15 19:09:35,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:09:35,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:09:35,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1474 transitions. [2021-10-15 19:09:35,502 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9710144927536232 [2021-10-15 19:09:35,503 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1474 transitions. [2021-10-15 19:09:35,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1474 transitions. [2021-10-15 19:09:35,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:09:35,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1474 transitions. [2021-10-15 19:09:35,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 491.3333333333333) internal successors, (1474), 3 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:35,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:35,538 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:35,540 INFO L186 Difference]: Start difference. First operand has 313 places, 449 transitions, 898 flow. Second operand 3 states and 1474 transitions. [2021-10-15 19:09:35,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 442 transitions, 908 flow [2021-10-15 19:09:35,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 442 transitions, 908 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:09:35,567 INFO L242 Difference]: Finished difference. Result has 317 places, 440 transitions, 900 flow [2021-10-15 19:09:35,570 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=900, PETRI_PLACES=317, PETRI_TRANSITIONS=440} [2021-10-15 19:09:35,571 INFO L334 CegarLoopForPetriNet]: 313 programPoint places, 4 predicate places. [2021-10-15 19:09:35,572 INFO L470 AbstractCegarLoop]: Abstraction has has 317 places, 440 transitions, 900 flow [2021-10-15 19:09:35,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 484.3333333333333) internal successors, (1453), 3 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:35,574 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:09:35,574 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] [2021-10-15 19:09:35,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:09:35,575 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-15 19:09:35,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:35,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1139587811, now seen corresponding path program 1 times [2021-10-15 19:09:35,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:35,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201033069] [2021-10-15 19:09:35,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:35,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:35,791 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 19:09:35,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:35,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201033069] [2021-10-15 19:09:35,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201033069] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:35,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:35,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:09:35,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176722058] [2021-10-15 19:09:35,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:09:35,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:35,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:09:35,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:09:35,805 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 506 [2021-10-15 19:09:35,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 440 transitions, 900 flow. Second operand has 3 states, 3 states have (on average 491.6666666666667) internal successors, (1475), 3 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:35,809 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:35,809 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 506 [2021-10-15 19:09:35,809 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:09:35,851 INFO L129 PetriNetUnfolder]: 187/631 cut-off events. [2021-10-15 19:09:35,852 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 19:09:35,853 INFO L84 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 631 events. 187/631 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2738 event pairs, 0 based on Foata normal form. 0/444 useless extension candidates. Maximal degree in co-relation 516. Up to 83 conditions per place. [2021-10-15 19:09:35,857 INFO L132 encePairwiseOnDemand]: 504/506 looper letters, 1 selfloop transitions, 1 changer transitions 0/439 dead transitions. [2021-10-15 19:09:35,860 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 439 transitions, 902 flow [2021-10-15 19:09:35,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:09:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:09:35,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1476 transitions. [2021-10-15 19:09:35,887 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9723320158102767 [2021-10-15 19:09:35,887 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1476 transitions. [2021-10-15 19:09:35,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1476 transitions. [2021-10-15 19:09:35,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:09:35,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1476 transitions. [2021-10-15 19:09:35,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 492.0) internal successors, (1476), 3 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:35,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:35,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:35,908 INFO L186 Difference]: Start difference. First operand has 317 places, 440 transitions, 900 flow. Second operand 3 states and 1476 transitions. [2021-10-15 19:09:35,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 439 transitions, 902 flow [2021-10-15 19:09:35,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 439 transitions, 896 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:09:35,923 INFO L242 Difference]: Finished difference. Result has 317 places, 439 transitions, 894 flow [2021-10-15 19:09:35,924 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=894, PETRI_PLACES=317, PETRI_TRANSITIONS=439} [2021-10-15 19:09:35,925 INFO L334 CegarLoopForPetriNet]: 313 programPoint places, 4 predicate places. [2021-10-15 19:09:35,925 INFO L470 AbstractCegarLoop]: Abstraction has has 317 places, 439 transitions, 894 flow [2021-10-15 19:09:35,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 491.6666666666667) internal successors, (1475), 3 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:35,928 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:09:35,929 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] [2021-10-15 19:09:35,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:09:35,934 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-15 19:09:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:35,937 INFO L82 PathProgramCache]: Analyzing trace with hash 236856078, now seen corresponding path program 1 times [2021-10-15 19:09:35,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:35,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64330943] [2021-10-15 19:09:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:35,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:36,088 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 19:09:36,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:36,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64330943] [2021-10-15 19:09:36,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64330943] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:36,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:36,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:09:36,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390984135] [2021-10-15 19:09:36,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:09:36,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:36,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:09:36,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:09:36,094 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 506 [2021-10-15 19:09:36,097 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 439 transitions, 894 flow. Second operand has 3 states, 3 states have (on average 475.6666666666667) internal successors, (1427), 3 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:36,098 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:36,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 506 [2021-10-15 19:09:36,098 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:09:36,244 INFO L129 PetriNetUnfolder]: 370/1198 cut-off events. [2021-10-15 19:09:36,244 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:09:36,246 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1258 conditions, 1198 events. 370/1198 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6459 event pairs, 1 based on Foata normal form. 1/858 useless extension candidates. Maximal degree in co-relation 1251. Up to 157 conditions per place. [2021-10-15 19:09:36,251 INFO L132 encePairwiseOnDemand]: 492/506 looper letters, 21 selfloop transitions, 9 changer transitions 0/451 dead transitions. [2021-10-15 19:09:36,252 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 451 transitions, 978 flow [2021-10-15 19:09:36,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:09:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:09:36,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1460 transitions. [2021-10-15 19:09:36,258 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9617918313570487 [2021-10-15 19:09:36,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1460 transitions. [2021-10-15 19:09:36,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1460 transitions. [2021-10-15 19:09:36,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:09:36,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1460 transitions. [2021-10-15 19:09:36,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 486.6666666666667) internal successors, (1460), 3 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:36,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:36,273 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:36,274 INFO L186 Difference]: Start difference. First operand has 317 places, 439 transitions, 894 flow. Second operand 3 states and 1460 transitions. [2021-10-15 19:09:36,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 451 transitions, 978 flow [2021-10-15 19:09:36,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 451 transitions, 977 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:09:36,286 INFO L242 Difference]: Finished difference. Result has 320 places, 447 transitions, 971 flow [2021-10-15 19:09:36,287 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=971, PETRI_PLACES=320, PETRI_TRANSITIONS=447} [2021-10-15 19:09:36,288 INFO L334 CegarLoopForPetriNet]: 313 programPoint places, 7 predicate places. [2021-10-15 19:09:36,289 INFO L470 AbstractCegarLoop]: Abstraction has has 320 places, 447 transitions, 971 flow [2021-10-15 19:09:36,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 475.6666666666667) internal successors, (1427), 3 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:36,291 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:09:36,291 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:09:36,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:09:36,293 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-15 19:09:36,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:36,294 INFO L82 PathProgramCache]: Analyzing trace with hash -2121048348, now seen corresponding path program 1 times [2021-10-15 19:09:36,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:36,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707226125] [2021-10-15 19:09:36,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:36,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:09:36,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:36,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707226125] [2021-10-15 19:09:36,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707226125] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:36,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:36,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:09:36,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685596857] [2021-10-15 19:09:36,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:09:36,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:36,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:09:36,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:09:36,418 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 468 out of 506 [2021-10-15 19:09:36,421 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 447 transitions, 971 flow. Second operand has 3 states, 3 states have (on average 469.6666666666667) internal successors, (1409), 3 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:36,421 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:36,421 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 468 of 506 [2021-10-15 19:09:36,422 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:09:36,661 INFO L129 PetriNetUnfolder]: 660/2145 cut-off events. [2021-10-15 19:09:36,662 INFO L130 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2021-10-15 19:09:36,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2350 conditions, 2145 events. 660/2145 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 13629 event pairs, 1 based on Foata normal form. 0/1538 useless extension candidates. Maximal degree in co-relation 2340. Up to 271 conditions per place. [2021-10-15 19:09:36,673 INFO L132 encePairwiseOnDemand]: 502/506 looper letters, 28 selfloop transitions, 3 changer transitions 0/449 dead transitions. [2021-10-15 19:09:36,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 449 transitions, 1039 flow [2021-10-15 19:09:36,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:09:36,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:09:36,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1433 transitions. [2021-10-15 19:09:36,679 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9440052700922266 [2021-10-15 19:09:36,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1433 transitions. [2021-10-15 19:09:36,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1433 transitions. [2021-10-15 19:09:36,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:09:36,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1433 transitions. [2021-10-15 19:09:36,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 477.6666666666667) internal successors, (1433), 3 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:36,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:36,693 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:36,693 INFO L186 Difference]: Start difference. First operand has 320 places, 447 transitions, 971 flow. Second operand 3 states and 1433 transitions. [2021-10-15 19:09:36,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 449 transitions, 1039 flow [2021-10-15 19:09:36,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 449 transitions, 1021 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:09:36,707 INFO L242 Difference]: Finished difference. Result has 322 places, 449 transitions, 977 flow [2021-10-15 19:09:36,708 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=977, PETRI_PLACES=322, PETRI_TRANSITIONS=449} [2021-10-15 19:09:36,708 INFO L334 CegarLoopForPetriNet]: 313 programPoint places, 9 predicate places. [2021-10-15 19:09:36,709 INFO L470 AbstractCegarLoop]: Abstraction has has 322 places, 449 transitions, 977 flow [2021-10-15 19:09:36,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 469.6666666666667) internal successors, (1409), 3 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:36,710 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:09:36,710 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 19:09:36,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:09:36,711 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-15 19:09:36,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:36,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1129102007, now seen corresponding path program 1 times [2021-10-15 19:09:36,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:36,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550146884] [2021-10-15 19:09:36,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:36,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:09:36,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:36,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550146884] [2021-10-15 19:09:36,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550146884] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:36,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:36,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:09:36,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839259622] [2021-10-15 19:09:36,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:09:36,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:36,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:09:36,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:09:36,802 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 468 out of 506 [2021-10-15 19:09:36,804 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 449 transitions, 977 flow. Second operand has 3 states, 3 states have (on average 469.6666666666667) internal successors, (1409), 3 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:36,805 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:36,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 468 of 506 [2021-10-15 19:09:36,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:09:37,156 INFO L129 PetriNetUnfolder]: 1164/3815 cut-off events. [2021-10-15 19:09:37,156 INFO L130 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2021-10-15 19:09:37,163 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4192 conditions, 3815 events. 1164/3815 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 28432 event pairs, 11 based on Foata normal form. 0/2740 useless extension candidates. Maximal degree in co-relation 4180. Up to 459 conditions per place. [2021-10-15 19:09:37,178 INFO L132 encePairwiseOnDemand]: 502/506 looper letters, 29 selfloop transitions, 4 changer transitions 0/452 dead transitions. [2021-10-15 19:09:37,178 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 452 transitions, 1059 flow [2021-10-15 19:09:37,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:09:37,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:09:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1433 transitions. [2021-10-15 19:09:37,184 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9440052700922266 [2021-10-15 19:09:37,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1433 transitions. [2021-10-15 19:09:37,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1433 transitions. [2021-10-15 19:09:37,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:09:37,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1433 transitions. [2021-10-15 19:09:37,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 477.6666666666667) internal successors, (1433), 3 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:37,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:37,198 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:37,198 INFO L186 Difference]: Start difference. First operand has 322 places, 449 transitions, 977 flow. Second operand 3 states and 1433 transitions. [2021-10-15 19:09:37,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 452 transitions, 1059 flow [2021-10-15 19:09:37,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 452 transitions, 1051 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:09:37,214 INFO L242 Difference]: Finished difference. Result has 324 places, 452 transitions, 1009 flow [2021-10-15 19:09:37,215 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1009, PETRI_PLACES=324, PETRI_TRANSITIONS=452} [2021-10-15 19:09:37,215 INFO L334 CegarLoopForPetriNet]: 313 programPoint places, 11 predicate places. [2021-10-15 19:09:37,216 INFO L470 AbstractCegarLoop]: Abstraction has has 324 places, 452 transitions, 1009 flow [2021-10-15 19:09:37,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 469.6666666666667) internal successors, (1409), 3 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:37,222 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:09:37,223 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:09:37,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:09:37,223 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-15 19:09:37,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:37,224 INFO L82 PathProgramCache]: Analyzing trace with hash -457313738, now seen corresponding path program 1 times [2021-10-15 19:09:37,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:37,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551921492] [2021-10-15 19:09:37,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:37,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 19:09:37,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:37,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551921492] [2021-10-15 19:09:37,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551921492] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:37,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:37,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:09:37,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189975379] [2021-10-15 19:09:37,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:09:37,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:37,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:09:37,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:09:37,348 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 489 out of 506 [2021-10-15 19:09:37,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 452 transitions, 1009 flow. Second operand has 3 states, 3 states have (on average 490.0) internal successors, (1470), 3 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:37,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:37,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 489 of 506 [2021-10-15 19:09:37,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:09:37,760 INFO L129 PetriNetUnfolder]: 1876/6021 cut-off events. [2021-10-15 19:09:37,760 INFO L130 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2021-10-15 19:09:37,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6490 conditions, 6021 events. 1876/6021 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 51203 event pairs, 22 based on Foata normal form. 0/4322 useless extension candidates. Maximal degree in co-relation 6477. Up to 917 conditions per place. [2021-10-15 19:09:37,803 INFO L132 encePairwiseOnDemand]: 502/506 looper letters, 5 selfloop transitions, 4 changer transitions 0/455 dead transitions. [2021-10-15 19:09:37,804 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 455 transitions, 1037 flow [2021-10-15 19:09:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:09:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:09:37,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1475 transitions. [2021-10-15 19:09:37,810 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.97167325428195 [2021-10-15 19:09:37,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1475 transitions. [2021-10-15 19:09:37,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1475 transitions. [2021-10-15 19:09:37,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:09:37,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1475 transitions. [2021-10-15 19:09:37,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 491.6666666666667) internal successors, (1475), 3 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:37,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:37,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:37,827 INFO L186 Difference]: Start difference. First operand has 324 places, 452 transitions, 1009 flow. Second operand 3 states and 1475 transitions. [2021-10-15 19:09:37,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 455 transitions, 1037 flow [2021-10-15 19:09:37,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 455 transitions, 1029 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:09:37,844 INFO L242 Difference]: Finished difference. Result has 326 places, 455 transitions, 1035 flow [2021-10-15 19:09:37,845 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1035, PETRI_PLACES=326, PETRI_TRANSITIONS=455} [2021-10-15 19:09:37,846 INFO L334 CegarLoopForPetriNet]: 313 programPoint places, 13 predicate places. [2021-10-15 19:09:37,846 INFO L470 AbstractCegarLoop]: Abstraction has has 326 places, 455 transitions, 1035 flow [2021-10-15 19:09:37,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 490.0) internal successors, (1470), 3 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:37,848 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:09:37,849 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:09:37,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:09:37,849 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-15 19:09:37,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:37,850 INFO L82 PathProgramCache]: Analyzing trace with hash -316765128, now seen corresponding path program 1 times [2021-10-15 19:09:37,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:37,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436470558] [2021-10-15 19:09:37,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:37,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 19:09:38,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:38,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436470558] [2021-10-15 19:09:38,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436470558] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:38,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:38,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:09:38,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728272711] [2021-10-15 19:09:38,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:09:38,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:38,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:09:38,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:09:38,047 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 483 out of 506 [2021-10-15 19:09:38,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 455 transitions, 1035 flow. Second operand has 4 states, 4 states have (on average 484.5) internal successors, (1938), 4 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:38,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:38,052 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 483 of 506 [2021-10-15 19:09:38,052 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:09:39,275 INFO L129 PetriNetUnfolder]: 1171/3926 cut-off events. [2021-10-15 19:09:39,275 INFO L130 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2021-10-15 19:09:39,283 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4335 conditions, 3926 events. 1171/3926 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 27673 event pairs, 11 based on Foata normal form. 32/2876 useless extension candidates. Maximal degree in co-relation 4321. Up to 476 conditions per place. [2021-10-15 19:09:39,300 INFO L132 encePairwiseOnDemand]: 501/506 looper letters, 13 selfloop transitions, 0 changer transitions 8/456 dead transitions. [2021-10-15 19:09:39,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 456 transitions, 1067 flow [2021-10-15 19:09:39,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:09:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:09:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1946 transitions. [2021-10-15 19:09:39,309 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9614624505928854 [2021-10-15 19:09:39,309 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1946 transitions. [2021-10-15 19:09:39,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1946 transitions. [2021-10-15 19:09:39,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:09:39,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1946 transitions. [2021-10-15 19:09:39,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 486.5) internal successors, (1946), 4 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:39,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 506.0) internal successors, (2530), 5 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:39,328 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 506.0) internal successors, (2530), 5 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:39,329 INFO L186 Difference]: Start difference. First operand has 326 places, 455 transitions, 1035 flow. Second operand 4 states and 1946 transitions. [2021-10-15 19:09:39,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 456 transitions, 1067 flow [2021-10-15 19:09:39,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 456 transitions, 1059 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:09:39,344 INFO L242 Difference]: Finished difference. Result has 329 places, 448 transitions, 1019 flow [2021-10-15 19:09:39,345 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1019, PETRI_PLACES=329, PETRI_TRANSITIONS=448} [2021-10-15 19:09:39,345 INFO L334 CegarLoopForPetriNet]: 313 programPoint places, 16 predicate places. [2021-10-15 19:09:39,345 INFO L470 AbstractCegarLoop]: Abstraction has has 329 places, 448 transitions, 1019 flow [2021-10-15 19:09:39,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 484.5) internal successors, (1938), 4 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:39,347 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:09:39,347 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:09:39,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:09:39,348 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-15 19:09:39,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:39,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1641982326, now seen corresponding path program 1 times [2021-10-15 19:09:39,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:39,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341356464] [2021-10-15 19:09:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:39,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:09:39,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:39,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341356464] [2021-10-15 19:09:39,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341356464] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:39,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:39,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:09:39,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691254512] [2021-10-15 19:09:39,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:09:39,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:39,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:09:39,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:09:39,472 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 468 out of 506 [2021-10-15 19:09:39,475 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 448 transitions, 1019 flow. Second operand has 3 states, 3 states have (on average 470.0) internal successors, (1410), 3 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:39,475 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:39,476 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 468 of 506 [2021-10-15 19:09:39,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:09:40,902 INFO L129 PetriNetUnfolder]: 1695/5642 cut-off events. [2021-10-15 19:09:40,902 INFO L130 PetriNetUnfolder]: For 203/203 co-relation queries the response was YES. [2021-10-15 19:09:40,919 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 5642 events. 1695/5642 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 43159 event pairs, 17 based on Foata normal form. 20/4100 useless extension candidates. Maximal degree in co-relation 6290. Up to 692 conditions per place. [2021-10-15 19:09:40,946 INFO L132 encePairwiseOnDemand]: 492/506 looper letters, 34 selfloop transitions, 10 changer transitions 0/459 dead transitions. [2021-10-15 19:09:40,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 459 transitions, 1151 flow [2021-10-15 19:09:40,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:09:40,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:09:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1447 transitions. [2021-10-15 19:09:40,953 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.953227931488801 [2021-10-15 19:09:40,954 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1447 transitions. [2021-10-15 19:09:40,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1447 transitions. [2021-10-15 19:09:40,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:09:40,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1447 transitions. [2021-10-15 19:09:40,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 482.3333333333333) internal successors, (1447), 3 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:40,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:40,968 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:40,968 INFO L186 Difference]: Start difference. First operand has 329 places, 448 transitions, 1019 flow. Second operand 3 states and 1447 transitions. [2021-10-15 19:09:40,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 459 transitions, 1151 flow [2021-10-15 19:09:40,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 459 transitions, 1135 flow, removed 8 selfloop flow, removed 2 redundant places. [2021-10-15 19:09:40,987 INFO L242 Difference]: Finished difference. Result has 326 places, 454 transitions, 1105 flow [2021-10-15 19:09:40,989 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1105, PETRI_PLACES=326, PETRI_TRANSITIONS=454} [2021-10-15 19:09:40,989 INFO L334 CegarLoopForPetriNet]: 313 programPoint places, 13 predicate places. [2021-10-15 19:09:40,989 INFO L470 AbstractCegarLoop]: Abstraction has has 326 places, 454 transitions, 1105 flow [2021-10-15 19:09:40,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 470.0) internal successors, (1410), 3 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:40,990 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:09:40,990 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 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 19:09:40,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:09:40,991 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-15 19:09:40,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:40,992 INFO L82 PathProgramCache]: Analyzing trace with hash -2092529363, now seen corresponding path program 1 times [2021-10-15 19:09:40,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:40,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294526115] [2021-10-15 19:09:40,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:40,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:09:41,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:41,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294526115] [2021-10-15 19:09:41,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294526115] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:41,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:41,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:09:41,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419336910] [2021-10-15 19:09:41,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:09:41,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:41,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:09:41,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:09:41,126 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 479 out of 506 [2021-10-15 19:09:41,130 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 454 transitions, 1105 flow. Second operand has 4 states, 4 states have (on average 481.25) internal successors, (1925), 4 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:41,130 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:41,130 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 479 of 506 [2021-10-15 19:09:41,130 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:09:42,879 INFO L129 PetriNetUnfolder]: 1683/5630 cut-off events. [2021-10-15 19:09:42,879 INFO L130 PetriNetUnfolder]: For 348/348 co-relation queries the response was YES. [2021-10-15 19:09:42,895 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6328 conditions, 5630 events. 1683/5630 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 43141 event pairs, 17 based on Foata normal form. 12/4120 useless extension candidates. Maximal degree in co-relation 6318. Up to 692 conditions per place. [2021-10-15 19:09:42,916 INFO L132 encePairwiseOnDemand]: 501/506 looper letters, 12 selfloop transitions, 8 changer transitions 1/455 dead transitions. [2021-10-15 19:09:42,916 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 455 transitions, 1147 flow [2021-10-15 19:09:42,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:09:42,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:09:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1932 transitions. [2021-10-15 19:09:42,924 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9545454545454546 [2021-10-15 19:09:42,924 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1932 transitions. [2021-10-15 19:09:42,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1932 transitions. [2021-10-15 19:09:42,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:09:42,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1932 transitions. [2021-10-15 19:09:42,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 483.0) internal successors, (1932), 4 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:42,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 506.0) internal successors, (2530), 5 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:42,939 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 506.0) internal successors, (2530), 5 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:42,939 INFO L186 Difference]: Start difference. First operand has 326 places, 454 transitions, 1105 flow. Second operand 4 states and 1932 transitions. [2021-10-15 19:09:42,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 455 transitions, 1147 flow [2021-10-15 19:09:42,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 455 transitions, 1127 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:09:42,955 INFO L242 Difference]: Finished difference. Result has 327 places, 452 transitions, 1095 flow [2021-10-15 19:09:42,956 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1095, PETRI_PLACES=327, PETRI_TRANSITIONS=452} [2021-10-15 19:09:42,956 INFO L334 CegarLoopForPetriNet]: 313 programPoint places, 14 predicate places. [2021-10-15 19:09:42,957 INFO L470 AbstractCegarLoop]: Abstraction has has 327 places, 452 transitions, 1095 flow [2021-10-15 19:09:42,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 481.25) internal successors, (1925), 4 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:42,958 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:09:42,958 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 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 19:09:42,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:09:42,958 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-15 19:09:42,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:42,959 INFO L82 PathProgramCache]: Analyzing trace with hash 664097903, now seen corresponding path program 1 times [2021-10-15 19:09:42,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:42,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547549826] [2021-10-15 19:09:42,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:42,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:09:43,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:43,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547549826] [2021-10-15 19:09:43,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547549826] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:43,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:43,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:09:43,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040182401] [2021-10-15 19:09:43,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:09:43,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:43,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:09:43,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:09:43,075 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 468 out of 506 [2021-10-15 19:09:43,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 452 transitions, 1095 flow. Second operand has 3 states, 3 states have (on average 470.0) internal successors, (1410), 3 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:43,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:43,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 468 of 506 [2021-10-15 19:09:43,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:09:44,850 INFO L129 PetriNetUnfolder]: 2457/8263 cut-off events. [2021-10-15 19:09:44,851 INFO L130 PetriNetUnfolder]: For 479/479 co-relation queries the response was YES. [2021-10-15 19:09:44,870 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9393 conditions, 8263 events. 2457/8263 cut-off events. For 479/479 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 68802 event pairs, 31 based on Foata normal form. 30/6035 useless extension candidates. Maximal degree in co-relation 9383. Up to 1010 conditions per place. [2021-10-15 19:09:44,900 INFO L132 encePairwiseOnDemand]: 492/506 looper letters, 35 selfloop transitions, 12 changer transitions 0/464 dead transitions. [2021-10-15 19:09:44,901 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 464 transitions, 1249 flow [2021-10-15 19:09:44,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:09:44,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:09:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1447 transitions. [2021-10-15 19:09:44,907 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.953227931488801 [2021-10-15 19:09:44,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1447 transitions. [2021-10-15 19:09:44,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1447 transitions. [2021-10-15 19:09:44,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:09:44,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1447 transitions. [2021-10-15 19:09:44,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 482.3333333333333) internal successors, (1447), 3 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:44,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:44,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:44,921 INFO L186 Difference]: Start difference. First operand has 327 places, 452 transitions, 1095 flow. Second operand 3 states and 1447 transitions. [2021-10-15 19:09:44,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 464 transitions, 1249 flow [2021-10-15 19:09:44,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 464 transitions, 1225 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 19:09:44,936 INFO L242 Difference]: Finished difference. Result has 328 places, 459 transitions, 1199 flow [2021-10-15 19:09:44,938 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=1077, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1199, PETRI_PLACES=328, PETRI_TRANSITIONS=459} [2021-10-15 19:09:44,938 INFO L334 CegarLoopForPetriNet]: 313 programPoint places, 15 predicate places. [2021-10-15 19:09:44,939 INFO L470 AbstractCegarLoop]: Abstraction has has 328 places, 459 transitions, 1199 flow [2021-10-15 19:09:44,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 470.0) internal successors, (1410), 3 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:44,940 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:09:44,940 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 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] [2021-10-15 19:09:44,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:09:44,941 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-15 19:09:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:44,943 INFO L82 PathProgramCache]: Analyzing trace with hash 979955502, now seen corresponding path program 1 times [2021-10-15 19:09:44,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:44,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765662079] [2021-10-15 19:09:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:44,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:09:45,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:45,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765662079] [2021-10-15 19:09:45,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765662079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:09:45,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217675237] [2021-10-15 19:09:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:45,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:09:45,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:09:45,115 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:09:45,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:09:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:45,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:09:45,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:09:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 19:09:45,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217675237] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:45,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:09:45,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-10-15 19:09:45,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696258519] [2021-10-15 19:09:45,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:09:45,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:45,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:09:45,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:09:45,850 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 463 out of 506 [2021-10-15 19:09:45,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 459 transitions, 1199 flow. Second operand has 5 states, 5 states have (on average 464.4) internal successors, (2322), 5 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:45,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:45,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 463 of 506 [2021-10-15 19:09:45,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:09:47,768 INFO L129 PetriNetUnfolder]: 2691/9271 cut-off events. [2021-10-15 19:09:47,768 INFO L130 PetriNetUnfolder]: For 735/735 co-relation queries the response was YES. [2021-10-15 19:09:47,792 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10813 conditions, 9271 events. 2691/9271 cut-off events. For 735/735 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 79754 event pairs, 31 based on Foata normal form. 36/6857 useless extension candidates. Maximal degree in co-relation 10802. Up to 1010 conditions per place. [2021-10-15 19:09:47,816 INFO L132 encePairwiseOnDemand]: 500/506 looper letters, 36 selfloop transitions, 2 changer transitions 3/462 dead transitions. [2021-10-15 19:09:47,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 462 transitions, 1287 flow [2021-10-15 19:09:47,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:09:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:09:47,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2348 transitions. [2021-10-15 19:09:47,825 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9280632411067193 [2021-10-15 19:09:47,826 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2348 transitions. [2021-10-15 19:09:47,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2348 transitions. [2021-10-15 19:09:47,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:09:47,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2348 transitions. [2021-10-15 19:09:47,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 469.6) internal successors, (2348), 5 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:47,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 506.0) internal successors, (3036), 6 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:47,844 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 506.0) internal successors, (3036), 6 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:47,844 INFO L186 Difference]: Start difference. First operand has 328 places, 459 transitions, 1199 flow. Second operand 5 states and 2348 transitions. [2021-10-15 19:09:47,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 462 transitions, 1287 flow [2021-10-15 19:09:47,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 462 transitions, 1263 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:09:47,862 INFO L242 Difference]: Finished difference. Result has 333 places, 459 transitions, 1205 flow [2021-10-15 19:09:47,863 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1205, PETRI_PLACES=333, PETRI_TRANSITIONS=459} [2021-10-15 19:09:47,863 INFO L334 CegarLoopForPetriNet]: 313 programPoint places, 20 predicate places. [2021-10-15 19:09:47,863 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 459 transitions, 1205 flow [2021-10-15 19:09:47,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 464.4) internal successors, (2322), 5 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:47,865 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:09:47,866 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 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] [2021-10-15 19:09:47,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:09:48,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:09:48,090 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-15 19:09:48,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:48,091 INFO L82 PathProgramCache]: Analyzing trace with hash 9935809, now seen corresponding path program 1 times [2021-10-15 19:09:48,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:48,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350675007] [2021-10-15 19:09:48,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:48,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 19:09:48,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:48,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350675007] [2021-10-15 19:09:48,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350675007] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:48,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:48,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:09:48,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527291623] [2021-10-15 19:09:48,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:09:48,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:48,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:09:48,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:09:48,221 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 491 out of 506 [2021-10-15 19:09:48,223 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 459 transitions, 1205 flow. Second operand has 3 states, 3 states have (on average 491.6666666666667) internal successors, (1475), 3 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:48,223 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:48,223 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 491 of 506 [2021-10-15 19:09:48,223 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:09:49,258 INFO L129 PetriNetUnfolder]: 2655/9145 cut-off events. [2021-10-15 19:09:49,258 INFO L130 PetriNetUnfolder]: For 439/439 co-relation queries the response was YES. [2021-10-15 19:09:49,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10185 conditions, 9145 events. 2655/9145 cut-off events. For 439/439 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 78121 event pairs, 31 based on Foata normal form. 0/6707 useless extension candidates. Maximal degree in co-relation 10171. Up to 1010 conditions per place. [2021-10-15 19:09:49,313 INFO L132 encePairwiseOnDemand]: 504/506 looper letters, 1 selfloop transitions, 1 changer transitions 0/455 dead transitions. [2021-10-15 19:09:49,313 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 455 transitions, 1201 flow [2021-10-15 19:09:49,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:09:49,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:09:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1476 transitions. [2021-10-15 19:09:49,320 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9723320158102767 [2021-10-15 19:09:49,320 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1476 transitions. [2021-10-15 19:09:49,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1476 transitions. [2021-10-15 19:09:49,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:09:49,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1476 transitions. [2021-10-15 19:09:49,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 492.0) internal successors, (1476), 3 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:49,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:49,333 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:49,334 INFO L186 Difference]: Start difference. First operand has 333 places, 459 transitions, 1205 flow. Second operand 3 states and 1476 transitions. [2021-10-15 19:09:49,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 455 transitions, 1201 flow [2021-10-15 19:09:49,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 455 transitions, 1177 flow, removed 11 selfloop flow, removed 3 redundant places. [2021-10-15 19:09:49,353 INFO L242 Difference]: Finished difference. Result has 328 places, 455 transitions, 1175 flow [2021-10-15 19:09:49,354 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1175, PETRI_PLACES=328, PETRI_TRANSITIONS=455} [2021-10-15 19:09:49,354 INFO L334 CegarLoopForPetriNet]: 313 programPoint places, 15 predicate places. [2021-10-15 19:09:49,355 INFO L470 AbstractCegarLoop]: Abstraction has has 328 places, 455 transitions, 1175 flow [2021-10-15 19:09:49,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 491.6666666666667) internal successors, (1475), 3 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:49,356 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:09:49,356 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 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] [2021-10-15 19:09:49,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 19:09:49,357 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-15 19:09:49,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:49,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1410017757, now seen corresponding path program 1 times [2021-10-15 19:09:49,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:49,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286905569] [2021-10-15 19:09:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:49,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:09:49,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:49,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286905569] [2021-10-15 19:09:49,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286905569] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:09:49,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758240436] [2021-10-15 19:09:49,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:49,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:09:49,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:09:49,567 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:09:49,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:09:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:49,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:09:49,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:09:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:09:50,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758240436] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:50,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:09:50,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-10-15 19:09:50,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581580909] [2021-10-15 19:09:50,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:09:50,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:50,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:09:50,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:09:50,243 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 484 out of 506 [2021-10-15 19:09:50,246 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 455 transitions, 1175 flow. Second operand has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:50,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:50,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 484 of 506 [2021-10-15 19:09:50,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:09:53,244 INFO L129 PetriNetUnfolder]: 7903/26943 cut-off events. [2021-10-15 19:09:53,244 INFO L130 PetriNetUnfolder]: For 994/994 co-relation queries the response was YES. [2021-10-15 19:09:53,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30278 conditions, 26943 events. 7903/26943 cut-off events. For 994/994 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 286064 event pairs, 110 based on Foata normal form. 18/19725 useless extension candidates. Maximal degree in co-relation 30266. Up to 3028 conditions per place. [2021-10-15 19:09:53,357 INFO L132 encePairwiseOnDemand]: 498/506 looper letters, 14 selfloop transitions, 11 changer transitions 0/470 dead transitions. [2021-10-15 19:09:53,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 470 transitions, 1273 flow [2021-10-15 19:09:53,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:09:53,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:09:53,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1962 transitions. [2021-10-15 19:09:53,365 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9693675889328063 [2021-10-15 19:09:53,365 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1962 transitions. [2021-10-15 19:09:53,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1962 transitions. [2021-10-15 19:09:53,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:09:53,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1962 transitions. [2021-10-15 19:09:53,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 490.5) internal successors, (1962), 4 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:53,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 506.0) internal successors, (2530), 5 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:53,380 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 506.0) internal successors, (2530), 5 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:53,380 INFO L186 Difference]: Start difference. First operand has 328 places, 455 transitions, 1175 flow. Second operand 4 states and 1962 transitions. [2021-10-15 19:09:53,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 470 transitions, 1273 flow [2021-10-15 19:09:53,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 470 transitions, 1272 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:09:53,403 INFO L242 Difference]: Finished difference. Result has 333 places, 465 transitions, 1268 flow [2021-10-15 19:09:53,404 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1268, PETRI_PLACES=333, PETRI_TRANSITIONS=465} [2021-10-15 19:09:53,405 INFO L334 CegarLoopForPetriNet]: 313 programPoint places, 20 predicate places. [2021-10-15 19:09:53,405 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 465 transitions, 1268 flow [2021-10-15 19:09:53,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:53,406 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:09:53,406 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:09:53,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:09:53,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 19:09:53,634 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-15 19:09:53,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:53,635 INFO L82 PathProgramCache]: Analyzing trace with hash 552854658, now seen corresponding path program 1 times [2021-10-15 19:09:53,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:53,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270464268] [2021-10-15 19:09:53,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:53,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 19:09:53,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:53,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270464268] [2021-10-15 19:09:53,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270464268] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:53,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:53,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:09:53,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416283126] [2021-10-15 19:09:53,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:09:53,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:53,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:09:53,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:09:53,756 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 483 out of 506 [2021-10-15 19:09:53,758 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 465 transitions, 1268 flow. Second operand has 3 states, 3 states have (on average 485.3333333333333) internal successors, (1456), 3 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:53,759 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:53,759 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 483 of 506 [2021-10-15 19:09:53,759 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:09:55,680 INFO L129 PetriNetUnfolder]: 2494/7971 cut-off events. [2021-10-15 19:09:55,680 INFO L130 PetriNetUnfolder]: For 790/790 co-relation queries the response was YES. [2021-10-15 19:09:55,695 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9576 conditions, 7971 events. 2494/7971 cut-off events. For 790/790 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 67765 event pairs, 34 based on Foata normal form. 108/5826 useless extension candidates. Maximal degree in co-relation 9562. Up to 1567 conditions per place. [2021-10-15 19:09:55,714 INFO L132 encePairwiseOnDemand]: 503/506 looper letters, 11 selfloop transitions, 1 changer transitions 8/447 dead transitions. [2021-10-15 19:09:55,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 447 transitions, 1158 flow [2021-10-15 19:09:55,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:09:55,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:09:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1461 transitions. [2021-10-15 19:09:55,721 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9624505928853755 [2021-10-15 19:09:55,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1461 transitions. [2021-10-15 19:09:55,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1461 transitions. [2021-10-15 19:09:55,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:09:55,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1461 transitions. [2021-10-15 19:09:55,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 487.0) internal successors, (1461), 3 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:55,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:55,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:55,733 INFO L186 Difference]: Start difference. First operand has 333 places, 465 transitions, 1268 flow. Second operand 3 states and 1461 transitions. [2021-10-15 19:09:55,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 447 transitions, 1158 flow [2021-10-15 19:09:55,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 447 transitions, 1154 flow, removed 2 selfloop flow, removed 0 redundant places. [2021-10-15 19:09:55,748 INFO L242 Difference]: Finished difference. Result has 327 places, 437 transitions, 1108 flow [2021-10-15 19:09:55,749 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1108, PETRI_PLACES=327, PETRI_TRANSITIONS=437} [2021-10-15 19:09:55,749 INFO L334 CegarLoopForPetriNet]: 313 programPoint places, 14 predicate places. [2021-10-15 19:09:55,749 INFO L470 AbstractCegarLoop]: Abstraction has has 327 places, 437 transitions, 1108 flow [2021-10-15 19:09:55,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 485.3333333333333) internal successors, (1456), 3 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:55,750 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:09:55,750 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 3, 3, 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] [2021-10-15 19:09:55,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-15 19:09:55,751 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-15 19:09:55,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:55,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1293494006, now seen corresponding path program 1 times [2021-10-15 19:09:55,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:55,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985020526] [2021-10-15 19:09:55,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:55,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-15 19:09:55,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:55,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985020526] [2021-10-15 19:09:55,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985020526] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:55,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:55,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:09:55,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360103095] [2021-10-15 19:09:55,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:09:55,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:55,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:09:55,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:09:55,970 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 474 out of 506 [2021-10-15 19:09:55,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 437 transitions, 1108 flow. Second operand has 3 states, 3 states have (on average 476.0) internal successors, (1428), 3 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:55,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:55,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 474 of 506 [2021-10-15 19:09:55,972 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:09:57,230 INFO L129 PetriNetUnfolder]: 4810/15336 cut-off events. [2021-10-15 19:09:57,231 INFO L130 PetriNetUnfolder]: For 810/810 co-relation queries the response was YES. [2021-10-15 19:09:57,272 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18134 conditions, 15336 events. 4810/15336 cut-off events. For 810/810 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 151847 event pairs, 68 based on Foata normal form. 0/11013 useless extension candidates. Maximal degree in co-relation 18119. Up to 3082 conditions per place. [2021-10-15 19:09:57,404 INFO L132 encePairwiseOnDemand]: 498/506 looper letters, 24 selfloop transitions, 7 changer transitions 0/451 dead transitions. [2021-10-15 19:09:57,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 451 transitions, 1202 flow [2021-10-15 19:09:57,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:09:57,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:09:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1453 transitions. [2021-10-15 19:09:57,410 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9571805006587615 [2021-10-15 19:09:57,411 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1453 transitions. [2021-10-15 19:09:57,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1453 transitions. [2021-10-15 19:09:57,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:09:57,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1453 transitions. [2021-10-15 19:09:57,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 484.3333333333333) internal successors, (1453), 3 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:57,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:57,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 506.0) internal successors, (2024), 4 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:57,422 INFO L186 Difference]: Start difference. First operand has 327 places, 437 transitions, 1108 flow. Second operand 3 states and 1453 transitions. [2021-10-15 19:09:57,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 451 transitions, 1202 flow [2021-10-15 19:09:57,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 451 transitions, 1199 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 19:09:57,438 INFO L242 Difference]: Finished difference. Result has 324 places, 443 transitions, 1163 flow [2021-10-15 19:09:57,440 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1163, PETRI_PLACES=324, PETRI_TRANSITIONS=443} [2021-10-15 19:09:57,440 INFO L334 CegarLoopForPetriNet]: 313 programPoint places, 11 predicate places. [2021-10-15 19:09:57,440 INFO L470 AbstractCegarLoop]: Abstraction has has 324 places, 443 transitions, 1163 flow [2021-10-15 19:09:57,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 476.0) internal successors, (1428), 3 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:57,441 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:09:57,441 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 3, 3, 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] [2021-10-15 19:09:57,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 19:09:57,442 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-15 19:09:57,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:09:57,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1610575735, now seen corresponding path program 1 times [2021-10-15 19:09:57,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:09:57,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091621113] [2021-10-15 19:09:57,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:09:57,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:09:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:09:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-15 19:09:57,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:09:57,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091621113] [2021-10-15 19:09:57,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091621113] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:09:57,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:09:57,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:09:57,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970882391] [2021-10-15 19:09:57,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:09:57,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:09:57,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:09:57,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:09:57,638 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 459 out of 506 [2021-10-15 19:09:57,641 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 443 transitions, 1163 flow. Second operand has 4 states, 4 states have (on average 460.5) internal successors, (1842), 4 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:57,641 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:09:57,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 459 of 506 [2021-10-15 19:09:57,641 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:09:57,759 INFO L129 PetriNetUnfolder]: 190/792 cut-off events. [2021-10-15 19:09:57,759 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-10-15 19:09:57,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 936 conditions, 792 events. 190/792 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4047 event pairs, 0 based on Foata normal form. 6/630 useless extension candidates. Maximal degree in co-relation 921. Up to 60 conditions per place. [2021-10-15 19:09:57,762 INFO L132 encePairwiseOnDemand]: 501/506 looper letters, 0 selfloop transitions, 0 changer transitions 185/185 dead transitions. [2021-10-15 19:09:57,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 185 transitions, 450 flow [2021-10-15 19:09:57,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:09:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:09:57,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1851 transitions. [2021-10-15 19:09:57,770 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9145256916996047 [2021-10-15 19:09:57,771 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1851 transitions. [2021-10-15 19:09:57,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1851 transitions. [2021-10-15 19:09:57,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:09:57,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1851 transitions. [2021-10-15 19:09:57,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 462.75) internal successors, (1851), 4 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:57,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 506.0) internal successors, (2530), 5 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:57,786 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 506.0) internal successors, (2530), 5 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:57,787 INFO L186 Difference]: Start difference. First operand has 324 places, 443 transitions, 1163 flow. Second operand 4 states and 1851 transitions. [2021-10-15 19:09:57,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 185 transitions, 450 flow [2021-10-15 19:09:57,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 185 transitions, 426 flow, removed 4 selfloop flow, removed 12 redundant places. [2021-10-15 19:09:57,792 INFO L242 Difference]: Finished difference. Result has 150 places, 0 transitions, 0 flow [2021-10-15 19:09:57,793 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=506, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=150, PETRI_TRANSITIONS=0} [2021-10-15 19:09:57,793 INFO L334 CegarLoopForPetriNet]: 313 programPoint places, -163 predicate places. [2021-10-15 19:09:57,793 INFO L470 AbstractCegarLoop]: Abstraction has has 150 places, 0 transitions, 0 flow [2021-10-15 19:09:57,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 460.5) internal successors, (1842), 4 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:09:57,797 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:09:57,798 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:09:57,799 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:09:57,799 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:09:57,799 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:09:57,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 19:09:57,809 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:09:57,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:09:57 BoogieIcfgContainer [2021-10-15 19:09:57,819 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:09:57,820 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:09:57,820 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:09:57,820 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:09:57,821 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:09:33" (3/4) ... [2021-10-15 19:09:57,824 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:09:57,874 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 164 nodes and edges [2021-10-15 19:09:57,878 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 72 nodes and edges [2021-10-15 19:09:57,883 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-15 19:09:57,886 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-15 19:09:57,890 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-15 19:09:57,894 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:09:57,897 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:09:58,109 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:09:58,110 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:09:58,112 INFO L168 Benchmark]: Toolchain (without parser) took 28367.04 ms. Allocated memory was 100.7 MB in the beginning and 1.3 GB in the end (delta: 1.2 GB). Free memory was 58.2 MB in the beginning and 830.8 MB in the end (delta: -772.6 MB). Peak memory consumption was 408.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:09:58,112 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 100.7 MB. Free memory is still 78.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:09:58,113 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1069.70 ms. Allocated memory was 100.7 MB in the beginning and 153.1 MB in the end (delta: 52.4 MB). Free memory was 58.0 MB in the beginning and 119.6 MB in the end (delta: -61.6 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:09:58,114 INFO L168 Benchmark]: Boogie Procedure Inliner took 186.28 ms. Allocated memory is still 153.1 MB. Free memory was 119.6 MB in the beginning and 110.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:09:58,114 INFO L168 Benchmark]: Boogie Preprocessor took 115.97 ms. Allocated memory is still 153.1 MB. Free memory was 110.0 MB in the beginning and 102.2 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:09:58,114 INFO L168 Benchmark]: RCFGBuilder took 2278.50 ms. Allocated memory is still 153.1 MB. Free memory was 102.2 MB in the beginning and 81.2 MB in the end (delta: 21.0 MB). Peak memory consumption was 45.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:09:58,115 INFO L168 Benchmark]: TraceAbstraction took 24404.12 ms. Allocated memory was 153.1 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 80.2 MB in the beginning and 862.2 MB in the end (delta: -782.0 MB). Peak memory consumption was 347.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:09:58,115 INFO L168 Benchmark]: Witness Printer took 290.01 ms. Allocated memory is still 1.3 GB. Free memory was 862.2 MB in the beginning and 830.8 MB in the end (delta: 31.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:09:58,118 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 100.7 MB. Free memory is still 78.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1069.70 ms. Allocated memory was 100.7 MB in the beginning and 153.1 MB in the end (delta: 52.4 MB). Free memory was 58.0 MB in the beginning and 119.6 MB in the end (delta: -61.6 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 186.28 ms. Allocated memory is still 153.1 MB. Free memory was 119.6 MB in the beginning and 110.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 115.97 ms. Allocated memory is still 153.1 MB. Free memory was 110.0 MB in the beginning and 102.2 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2278.50 ms. Allocated memory is still 153.1 MB. Free memory was 102.2 MB in the beginning and 81.2 MB in the end (delta: 21.0 MB). Peak memory consumption was 45.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 24404.12 ms. Allocated memory was 153.1 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 80.2 MB in the beginning and 862.2 MB in the end (delta: -782.0 MB). Peak memory consumption was 347.3 MB. Max. memory is 16.1 GB. * Witness Printer took 290.01 ms. Allocated memory is still 1.3 GB. Free memory was 862.2 MB in the beginning and 830.8 MB in the end (delta: 31.5 MB). Peak memory consumption was 31.5 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: 2013]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 2013]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 2013]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 2013]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 2013]: 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, 350 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 13.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 24317.1ms, OverallIterations: 16, TraceHistogramMax: 5, EmptinessCheckTime: 0.0ms, AutomataDifference: 19270.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 192.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 177 SDtfs, 72 SDslu, 68 SDs, 0 SdLazy, 267 SolverSat, 73 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7396.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 208 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 221.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1268occurred in iteration=13, InterpolantAutomatonStates: 54, 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: 301.4ms SsaConstructionTime, 1281.6ms SatisfiabilityAnalysisTime, 2116.6ms InterpolantComputationTime, 1089 NumberOfCodeBlocks, 1089 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 1071 ConstructedInterpolants, 0 QuantifiedInterpolants, 1824 SizeOfPredicates, 2 NumberOfNonLiveVariables, 1929 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 18 InterpolantComputations, 16 PerfectInterpolantSequences, 209/235 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 5 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:09:58,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_520d3386-3a37-49b7-a385-857a56a702bd/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...