./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/ex3_forlist.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/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_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/ex3_forlist.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 78f95c70d702e3726c098ef8eec3c10bcd690c4e ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 20:27:13,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:27:13,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:27:14,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:27:14,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:27:14,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:27:14,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:27:14,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:27:14,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:27:14,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:27:14,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:27:14,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:27:14,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:27:14,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:27:14,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:27:14,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:27:14,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:27:14,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:27:14,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:27:14,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:27:14,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:27:14,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:27:14,111 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:27:14,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:27:14,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:27:14,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:27:14,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:27:14,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:27:14,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:27:14,130 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:27:14,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:27:14,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:27:14,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:27:14,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:27:14,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:27:14,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:27:14,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:27:14,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:27:14,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:27:14,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:27:14,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:27:14,143 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:27:14,194 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:27:14,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:27:14,195 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:27:14,195 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:27:14,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:27:14,197 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:27:14,197 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:27:14,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:27:14,198 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:27:14,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:27:14,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:27:14,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:27:14,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:27:14,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:27:14,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:27:14,200 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:27:14,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:27:14,200 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:27:14,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:27:14,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:27:14,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:27:14,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:27:14,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:27:14,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:27:14,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:27:14,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:27:14,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:27:14,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:27:14,204 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:27:14,204 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:27:14,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:27:14,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:27:14,205 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_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78f95c70d702e3726c098ef8eec3c10bcd690c4e [2021-10-15 20:27:14,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:27:14,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:27:14,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:27:14,553 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:27:14,554 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:27:14,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/ldv-regression/ex3_forlist.i [2021-10-15 20:27:14,640 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/data/ef73ecdf7/5098cf6bce134dd3bfe83e699a100706/FLAGf30555c7e [2021-10-15 20:27:15,343 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:27:15,345 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/sv-benchmarks/c/ldv-regression/ex3_forlist.i [2021-10-15 20:27:15,360 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/data/ef73ecdf7/5098cf6bce134dd3bfe83e699a100706/FLAGf30555c7e [2021-10-15 20:27:15,678 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/data/ef73ecdf7/5098cf6bce134dd3bfe83e699a100706 [2021-10-15 20:27:15,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:27:15,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:27:15,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:27:15,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:27:15,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:27:15,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:27:15" (1/1) ... [2021-10-15 20:27:15,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a2d1a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:27:15, skipping insertion in model container [2021-10-15 20:27:15,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:27:15" (1/1) ... [2021-10-15 20:27:15,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:27:15,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:27:16,018 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_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/sv-benchmarks/c/ldv-regression/ex3_forlist.i[293,306] [2021-10-15 20:27:16,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:27:16,086 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:27:16,103 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_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/sv-benchmarks/c/ldv-regression/ex3_forlist.i[293,306] [2021-10-15 20:27:16,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:27:16,154 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:27:16,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:27:16 WrapperNode [2021-10-15 20:27:16,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:27:16,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:27:16,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:27:16,158 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:27:16,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:27:16" (1/1) ... [2021-10-15 20:27:16,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:27:16" (1/1) ... [2021-10-15 20:27:16,233 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:27:16,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:27:16,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:27:16,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:27:16,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:27:16" (1/1) ... [2021-10-15 20:27:16,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:27:16" (1/1) ... [2021-10-15 20:27:16,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:27:16" (1/1) ... [2021-10-15 20:27:16,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:27:16" (1/1) ... [2021-10-15 20:27:16,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:27:16" (1/1) ... [2021-10-15 20:27:16,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:27:16" (1/1) ... [2021-10-15 20:27:16,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:27:16" (1/1) ... [2021-10-15 20:27:16,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:27:16,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:27:16,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:27:16,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:27:16,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:27:16" (1/1) ... [2021-10-15 20:27:16,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:27:16,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:16,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:27:16,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:27:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 20:27:16,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-15 20:27:16,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:27:16,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 20:27:16,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:27:16,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 20:27:16,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:27:16,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:27:16,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 20:27:16,811 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:27:16,811 INFO L299 CfgBuilder]: Removed 27 assume(true) statements. [2021-10-15 20:27:16,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:27:16 BoogieIcfgContainer [2021-10-15 20:27:16,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:27:16,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:27:16,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:27:16,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:27:16,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:27:15" (1/3) ... [2021-10-15 20:27:16,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43607b46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:27:16, skipping insertion in model container [2021-10-15 20:27:16,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:27:16" (2/3) ... [2021-10-15 20:27:16,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43607b46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:27:16, skipping insertion in model container [2021-10-15 20:27:16,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:27:16" (3/3) ... [2021-10-15 20:27:16,823 INFO L111 eAbstractionObserver]: Analyzing ICFG ex3_forlist.i [2021-10-15 20:27:16,829 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:27:16,829 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-15 20:27:16,937 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:27:16,956 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 20:27:16,956 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-15 20:27:16,972 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 35 places, 51 transitions, 102 flow [2021-10-15 20:27:17,018 INFO L129 PetriNetUnfolder]: 17/51 cut-off events. [2021-10-15 20:27:17,021 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:27:17,024 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 51 events. 17/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 67 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 20:27:17,024 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 51 transitions, 102 flow [2021-10-15 20:27:17,040 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 45 transitions, 90 flow [2021-10-15 20:27:17,053 INFO L129 PetriNetUnfolder]: 13/39 cut-off events. [2021-10-15 20:27:17,054 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:27:17,054 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:17,055 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:17,060 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:17,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:17,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1350473018, now seen corresponding path program 1 times [2021-10-15 20:27:17,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:17,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347587496] [2021-10-15 20:27:17,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:17,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:17,265 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 20:27:17,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:17,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347587496] [2021-10-15 20:27:17,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347587496] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:27:17,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:27:17,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:27:17,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254466554] [2021-10-15 20:27:17,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:27:17,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:17,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:27:17,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:27:17,300 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 51 [2021-10-15 20:27:17,304 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 45 transitions, 90 flow. Second operand has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:17,304 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:17,305 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 51 [2021-10-15 20:27:17,306 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:17,318 INFO L129 PetriNetUnfolder]: 9/39 cut-off events. [2021-10-15 20:27:17,319 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:27:17,320 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 39 events. 9/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 6/35 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2021-10-15 20:27:17,322 INFO L132 encePairwiseOnDemand]: 45/51 looper letters, 0 selfloop transitions, 0 changer transitions 0/39 dead transitions. [2021-10-15 20:27:17,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 78 flow [2021-10-15 20:27:17,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:27:17,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:27:17,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 94 transitions. [2021-10-15 20:27:17,336 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9215686274509803 [2021-10-15 20:27:17,337 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 94 transitions. [2021-10-15 20:27:17,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 94 transitions. [2021-10-15 20:27:17,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:17,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 94 transitions. [2021-10-15 20:27:17,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 47.0) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:17,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:17,350 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:17,353 INFO L186 Difference]: Start difference. First operand has 31 places, 45 transitions, 90 flow. Second operand 2 states and 94 transitions. [2021-10-15 20:27:17,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 78 flow [2021-10-15 20:27:17,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 39 transitions, 78 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:27:17,361 INFO L242 Difference]: Finished difference. Result has 32 places, 39 transitions, 78 flow [2021-10-15 20:27:17,364 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=78, PETRI_PLACES=32, PETRI_TRANSITIONS=39} [2021-10-15 20:27:17,365 INFO L334 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2021-10-15 20:27:17,366 INFO L470 AbstractCegarLoop]: Abstraction has has 32 places, 39 transitions, 78 flow [2021-10-15 20:27:17,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:17,366 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:17,367 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:17,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:27:17,369 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:17,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:17,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1581099477, now seen corresponding path program 1 times [2021-10-15 20:27:17,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:17,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192269337] [2021-10-15 20:27:17,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:17,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:17,512 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 20:27:17,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:17,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192269337] [2021-10-15 20:27:17,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192269337] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:27:17,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:27:17,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:27:17,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970437245] [2021-10-15 20:27:17,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:27:17,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:17,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:27:17,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:27:17,519 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 51 [2021-10-15 20:27:17,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 39 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:17,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:17,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 51 [2021-10-15 20:27:17,520 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:17,547 INFO L129 PetriNetUnfolder]: 9/41 cut-off events. [2021-10-15 20:27:17,547 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:27:17,548 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 9/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 47. Up to 5 conditions per place. [2021-10-15 20:27:17,549 INFO L132 encePairwiseOnDemand]: 48/51 looper letters, 4 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2021-10-15 20:27:17,549 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 41 transitions, 94 flow [2021-10-15 20:27:17,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:27:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:27:17,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2021-10-15 20:27:17,552 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8300653594771242 [2021-10-15 20:27:17,553 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 127 transitions. [2021-10-15 20:27:17,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 127 transitions. [2021-10-15 20:27:17,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:17,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 127 transitions. [2021-10-15 20:27:17,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:17,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:17,558 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:17,559 INFO L186 Difference]: Start difference. First operand has 32 places, 39 transitions, 78 flow. Second operand 3 states and 127 transitions. [2021-10-15 20:27:17,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 41 transitions, 94 flow [2021-10-15 20:27:17,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 94 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:27:17,563 INFO L242 Difference]: Finished difference. Result has 35 places, 40 transitions, 90 flow [2021-10-15 20:27:17,564 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=35, PETRI_TRANSITIONS=40} [2021-10-15 20:27:17,564 INFO L334 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2021-10-15 20:27:17,565 INFO L470 AbstractCegarLoop]: Abstraction has has 35 places, 40 transitions, 90 flow [2021-10-15 20:27:17,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:17,566 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:17,566 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:17,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:27:17,566 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:17,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:17,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1658708759, now seen corresponding path program 1 times [2021-10-15 20:27:17,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:17,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713429937] [2021-10-15 20:27:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:17,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:27:17,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:17,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713429937] [2021-10-15 20:27:17,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713429937] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:17,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088295066] [2021-10-15 20:27:17,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:17,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:17,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:17,661 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:27:17,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:27:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:17,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:27:17,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:27:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:27:17,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088295066] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:27:17,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:27:17,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 20:27:17,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001566096] [2021-10-15 20:27:17,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:27:17,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:17,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:27:17,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:27:17,882 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 51 [2021-10-15 20:27:17,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 40 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:17,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:17,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 51 [2021-10-15 20:27:17,885 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:17,970 INFO L129 PetriNetUnfolder]: 14/69 cut-off events. [2021-10-15 20:27:17,970 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 20:27:17,971 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 69 events. 14/69 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 140 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 91. Up to 11 conditions per place. [2021-10-15 20:27:17,972 INFO L132 encePairwiseOnDemand]: 45/51 looper letters, 13 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2021-10-15 20:27:17,979 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 47 transitions, 138 flow [2021-10-15 20:27:17,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:27:17,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:27:17,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2021-10-15 20:27:17,983 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7908496732026143 [2021-10-15 20:27:17,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 121 transitions. [2021-10-15 20:27:17,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 121 transitions. [2021-10-15 20:27:17,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:17,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 121 transitions. [2021-10-15 20:27:17,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:17,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:17,988 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:17,988 INFO L186 Difference]: Start difference. First operand has 35 places, 40 transitions, 90 flow. Second operand 3 states and 121 transitions. [2021-10-15 20:27:17,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 47 transitions, 138 flow [2021-10-15 20:27:17,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 47 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:27:17,993 INFO L242 Difference]: Finished difference. Result has 38 places, 43 transitions, 120 flow [2021-10-15 20:27:17,993 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=38, PETRI_TRANSITIONS=43} [2021-10-15 20:27:17,993 INFO L334 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2021-10-15 20:27:17,994 INFO L470 AbstractCegarLoop]: Abstraction has has 38 places, 43 transitions, 120 flow [2021-10-15 20:27:17,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:17,994 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:17,995 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:18,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:27:18,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:18,214 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:18,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:18,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1382422530, now seen corresponding path program 1 times [2021-10-15 20:27:18,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:18,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600145926] [2021-10-15 20:27:18,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:18,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:18,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:27:18,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:18,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600145926] [2021-10-15 20:27:18,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600145926] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:18,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600492691] [2021-10-15 20:27:18,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:18,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:18,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:18,281 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:27:18,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:27:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:18,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:27:18,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:27:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:27:18,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600492691] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:18,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:27:18,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-15 20:27:18,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081157419] [2021-10-15 20:27:18,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:27:18,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:18,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:27:18,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:27:18,553 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 51 [2021-10-15 20:27:18,555 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 43 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:18,558 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:18,558 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 51 [2021-10-15 20:27:18,559 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:18,602 INFO L129 PetriNetUnfolder]: 14/70 cut-off events. [2021-10-15 20:27:18,607 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-15 20:27:18,609 INFO L84 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 70 events. 14/70 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 140 event pairs, 0 based on Foata normal form. 1/57 useless extension candidates. Maximal degree in co-relation 94. Up to 7 conditions per place. [2021-10-15 20:27:18,613 INFO L132 encePairwiseOnDemand]: 47/51 looper letters, 3 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2021-10-15 20:27:18,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 138 flow [2021-10-15 20:27:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:27:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:27:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 168 transitions. [2021-10-15 20:27:18,624 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8235294117647058 [2021-10-15 20:27:18,625 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 168 transitions. [2021-10-15 20:27:18,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 168 transitions. [2021-10-15 20:27:18,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:18,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 168 transitions. [2021-10-15 20:27:18,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:18,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:18,638 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:18,638 INFO L186 Difference]: Start difference. First operand has 38 places, 43 transitions, 120 flow. Second operand 4 states and 168 transitions. [2021-10-15 20:27:18,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 138 flow [2021-10-15 20:27:18,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 130 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:27:18,646 INFO L242 Difference]: Finished difference. Result has 41 places, 44 transitions, 132 flow [2021-10-15 20:27:18,648 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=41, PETRI_TRANSITIONS=44} [2021-10-15 20:27:18,648 INFO L334 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2021-10-15 20:27:18,648 INFO L470 AbstractCegarLoop]: Abstraction has has 41 places, 44 transitions, 132 flow [2021-10-15 20:27:18,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:18,649 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:18,651 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:18,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:27:18,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:18,877 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:18,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1994936256, now seen corresponding path program 2 times [2021-10-15 20:27:18,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:18,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763919141] [2021-10-15 20:27:18,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:18,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:27:19,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:19,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763919141] [2021-10-15 20:27:19,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763919141] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:27:19,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:27:19,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 20:27:19,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599168651] [2021-10-15 20:27:19,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:27:19,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:19,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:27:19,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:27:19,565 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2021-10-15 20:27:19,566 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 132 flow. Second operand has 9 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:19,566 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:19,566 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2021-10-15 20:27:19,566 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:20,083 INFO L129 PetriNetUnfolder]: 19/97 cut-off events. [2021-10-15 20:27:20,083 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-10-15 20:27:20,084 INFO L84 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 97 events. 19/97 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 273 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 181. Up to 33 conditions per place. [2021-10-15 20:27:20,086 INFO L132 encePairwiseOnDemand]: 40/51 looper letters, 36 selfloop transitions, 11 changer transitions 0/62 dead transitions. [2021-10-15 20:27:20,087 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 268 flow [2021-10-15 20:27:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 20:27:20,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 20:27:20,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2021-10-15 20:27:20,089 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.44313725490196076 [2021-10-15 20:27:20,090 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 226 transitions. [2021-10-15 20:27:20,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 226 transitions. [2021-10-15 20:27:20,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:20,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 226 transitions. [2021-10-15 20:27:20,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 22.6) internal successors, (226), 10 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:20,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 51.0) internal successors, (561), 11 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:20,095 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 51.0) internal successors, (561), 11 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:20,095 INFO L186 Difference]: Start difference. First operand has 41 places, 44 transitions, 132 flow. Second operand 10 states and 226 transitions. [2021-10-15 20:27:20,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 268 flow [2021-10-15 20:27:20,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 264 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 20:27:20,099 INFO L242 Difference]: Finished difference. Result has 53 places, 49 transitions, 185 flow [2021-10-15 20:27:20,100 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=185, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2021-10-15 20:27:20,100 INFO L334 CegarLoopForPetriNet]: 31 programPoint places, 22 predicate places. [2021-10-15 20:27:20,100 INFO L470 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 185 flow [2021-10-15 20:27:20,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:20,101 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:20,101 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] [2021-10-15 20:27:20,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 20:27:20,101 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:20,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:20,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1264833415, now seen corresponding path program 1 times [2021-10-15 20:27:20,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:20,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847672484] [2021-10-15 20:27:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:20,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:27:20,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:20,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847672484] [2021-10-15 20:27:20,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847672484] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:20,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38572076] [2021-10-15 20:27:20,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:20,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:20,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:20,170 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:27:20,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:27:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:20,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:27:20,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:27:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:27:20,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38572076] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:20,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:27:20,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-15 20:27:20,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795146653] [2021-10-15 20:27:20,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:27:20,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:20,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:27:20,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:27:20,394 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 51 [2021-10-15 20:27:20,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 185 flow. Second operand has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:20,395 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:20,395 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 51 [2021-10-15 20:27:20,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:20,505 INFO L129 PetriNetUnfolder]: 22/120 cut-off events. [2021-10-15 20:27:20,506 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2021-10-15 20:27:20,506 INFO L84 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 120 events. 22/120 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 361 event pairs, 0 based on Foata normal form. 3/103 useless extension candidates. Maximal degree in co-relation 203. Up to 12 conditions per place. [2021-10-15 20:27:20,507 INFO L132 encePairwiseOnDemand]: 43/51 looper letters, 13 selfloop transitions, 10 changer transitions 0/55 dead transitions. [2021-10-15 20:27:20,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 253 flow [2021-10-15 20:27:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:27:20,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:27:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2021-10-15 20:27:20,519 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7745098039215687 [2021-10-15 20:27:20,519 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 158 transitions. [2021-10-15 20:27:20,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 158 transitions. [2021-10-15 20:27:20,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:20,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 158 transitions. [2021-10-15 20:27:20,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:20,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:20,529 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:20,529 INFO L186 Difference]: Start difference. First operand has 53 places, 49 transitions, 185 flow. Second operand 4 states and 158 transitions. [2021-10-15 20:27:20,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 253 flow [2021-10-15 20:27:20,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 242 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-10-15 20:27:20,539 INFO L242 Difference]: Finished difference. Result has 54 places, 52 transitions, 226 flow [2021-10-15 20:27:20,541 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2021-10-15 20:27:20,541 INFO L334 CegarLoopForPetriNet]: 31 programPoint places, 23 predicate places. [2021-10-15 20:27:20,542 INFO L470 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 226 flow [2021-10-15 20:27:20,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:20,546 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:20,546 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:20,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:27:20,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:20,757 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:20,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:20,757 INFO L82 PathProgramCache]: Analyzing trace with hash 964936531, now seen corresponding path program 1 times [2021-10-15 20:27:20,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:20,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197056114] [2021-10-15 20:27:20,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:20,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 20:27:20,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:20,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197056114] [2021-10-15 20:27:20,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197056114] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:27:20,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:27:20,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:27:20,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486801457] [2021-10-15 20:27:20,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:27:20,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:20,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:27:20,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:27:20,974 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2021-10-15 20:27:20,974 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 226 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:20,975 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:20,975 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2021-10-15 20:27:20,975 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:21,408 INFO L129 PetriNetUnfolder]: 32/180 cut-off events. [2021-10-15 20:27:21,409 INFO L130 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2021-10-15 20:27:21,410 INFO L84 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 180 events. 32/180 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 685 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 398. Up to 59 conditions per place. [2021-10-15 20:27:21,411 INFO L132 encePairwiseOnDemand]: 31/51 looper letters, 67 selfloop transitions, 42 changer transitions 0/123 dead transitions. [2021-10-15 20:27:21,411 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 123 transitions, 616 flow [2021-10-15 20:27:21,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 20:27:21,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 20:27:21,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 334 transitions. [2021-10-15 20:27:21,417 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4677871148459384 [2021-10-15 20:27:21,417 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 334 transitions. [2021-10-15 20:27:21,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 334 transitions. [2021-10-15 20:27:21,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:21,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 334 transitions. [2021-10-15 20:27:21,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 23.857142857142858) internal successors, (334), 14 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:21,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 51.0) internal successors, (765), 15 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:21,423 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 51.0) internal successors, (765), 15 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:21,424 INFO L186 Difference]: Start difference. First operand has 54 places, 52 transitions, 226 flow. Second operand 14 states and 334 transitions. [2021-10-15 20:27:21,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 123 transitions, 616 flow [2021-10-15 20:27:21,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 123 transitions, 600 flow, removed 5 selfloop flow, removed 1 redundant places. [2021-10-15 20:27:21,436 INFO L242 Difference]: Finished difference. Result has 73 places, 85 transitions, 464 flow [2021-10-15 20:27:21,437 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=464, PETRI_PLACES=73, PETRI_TRANSITIONS=85} [2021-10-15 20:27:21,437 INFO L334 CegarLoopForPetriNet]: 31 programPoint places, 42 predicate places. [2021-10-15 20:27:21,437 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 85 transitions, 464 flow [2021-10-15 20:27:21,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:21,438 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:21,438 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:21,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 20:27:21,439 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:21,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:21,440 INFO L82 PathProgramCache]: Analyzing trace with hash -554343156, now seen corresponding path program 1 times [2021-10-15 20:27:21,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:21,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833366606] [2021-10-15 20:27:21,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:21,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:27:21,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:21,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833366606] [2021-10-15 20:27:21,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833366606] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:21,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279776577] [2021-10-15 20:27:21,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:21,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:21,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:21,895 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:27:21,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:27:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:22,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-15 20:27:22,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:27:22,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-10-15 20:27:22,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:27:22,517 INFO L354 Elim1Store]: treesize reduction 106, result has 15.2 percent of original size [2021-10-15 20:27:22,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 40 [2021-10-15 20:27:22,784 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-15 20:27:22,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 22 [2021-10-15 20:27:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:27:22,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279776577] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:27:22,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:27:22,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 14 [2021-10-15 20:27:22,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57256516] [2021-10-15 20:27:22,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 20:27:22,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:22,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 20:27:22,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:27:22,798 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2021-10-15 20:27:22,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 85 transitions, 464 flow. Second operand has 10 states, 10 states have (on average 17.4) internal successors, (174), 10 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:22,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:22,799 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2021-10-15 20:27:22,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:25,536 INFO L129 PetriNetUnfolder]: 37/211 cut-off events. [2021-10-15 20:27:25,536 INFO L130 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2021-10-15 20:27:25,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 211 events. 37/211 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 924 event pairs, 0 based on Foata normal form. 3/214 useless extension candidates. Maximal degree in co-relation 656. Up to 62 conditions per place. [2021-10-15 20:27:25,540 INFO L132 encePairwiseOnDemand]: 31/51 looper letters, 84 selfloop transitions, 46 changer transitions 0/144 dead transitions. [2021-10-15 20:27:25,540 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 144 transitions, 1018 flow [2021-10-15 20:27:25,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 20:27:25,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 20:27:25,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 336 transitions. [2021-10-15 20:27:25,543 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2021-10-15 20:27:25,543 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 336 transitions. [2021-10-15 20:27:25,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 336 transitions. [2021-10-15 20:27:25,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:25,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 336 transitions. [2021-10-15 20:27:25,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 24.0) internal successors, (336), 14 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:25,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 51.0) internal successors, (765), 15 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:25,548 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 51.0) internal successors, (765), 15 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:25,548 INFO L186 Difference]: Start difference. First operand has 73 places, 85 transitions, 464 flow. Second operand 14 states and 336 transitions. [2021-10-15 20:27:25,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 144 transitions, 1018 flow [2021-10-15 20:27:25,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 144 transitions, 1007 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-10-15 20:27:25,561 INFO L242 Difference]: Finished difference. Result has 86 places, 99 transitions, 650 flow [2021-10-15 20:27:25,561 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=650, PETRI_PLACES=86, PETRI_TRANSITIONS=99} [2021-10-15 20:27:25,562 INFO L334 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2021-10-15 20:27:25,562 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 650 flow [2021-10-15 20:27:25,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.4) internal successors, (174), 10 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:25,562 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:25,562 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:25,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:27:25,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:25,781 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:25,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:25,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2029788007, now seen corresponding path program 1 times [2021-10-15 20:27:25,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:25,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80832588] [2021-10-15 20:27:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:25,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 20:27:26,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:26,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80832588] [2021-10-15 20:27:26,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80832588] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:26,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305014613] [2021-10-15 20:27:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:26,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:26,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:26,282 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:27:26,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:27:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:26,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-15 20:27:26,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:27:26,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 88 [2021-10-15 20:27:26,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 11 [2021-10-15 20:27:26,734 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 20:27:26,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 25 [2021-10-15 20:27:27,588 INFO L354 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2021-10-15 20:27:27,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 50 [2021-10-15 20:27:27,864 INFO L354 Elim1Store]: treesize reduction 126, result has 13.1 percent of original size [2021-10-15 20:27:27,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 29 [2021-10-15 20:27:27,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-15 20:27:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:27:27,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305014613] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:27,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:27:27,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16] total 23 [2021-10-15 20:27:27,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965938139] [2021-10-15 20:27:27,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-15 20:27:27,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:27,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-15 20:27:27,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-10-15 20:27:27,999 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 51 [2021-10-15 20:27:28,000 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 99 transitions, 650 flow. Second operand has 24 states, 24 states have (on average 11.041666666666666) internal successors, (265), 24 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:28,000 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:28,000 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 51 [2021-10-15 20:27:28,001 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:29,549 INFO L129 PetriNetUnfolder]: 20/122 cut-off events. [2021-10-15 20:27:29,552 INFO L130 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2021-10-15 20:27:29,553 INFO L84 FinitePrefix]: Finished finitePrefix Result has 469 conditions, 122 events. 20/122 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 381 event pairs, 0 based on Foata normal form. 1/123 useless extension candidates. Maximal degree in co-relation 445. Up to 81 conditions per place. [2021-10-15 20:27:29,555 INFO L132 encePairwiseOnDemand]: 42/51 looper letters, 48 selfloop transitions, 8 changer transitions 0/70 dead transitions. [2021-10-15 20:27:29,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 70 transitions, 554 flow [2021-10-15 20:27:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 20:27:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 20:27:29,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2021-10-15 20:27:29,557 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2411764705882353 [2021-10-15 20:27:29,558 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 123 transitions. [2021-10-15 20:27:29,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 123 transitions. [2021-10-15 20:27:29,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:29,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 123 transitions. [2021-10-15 20:27:29,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:29,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 51.0) internal successors, (561), 11 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:29,561 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 51.0) internal successors, (561), 11 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:29,561 INFO L186 Difference]: Start difference. First operand has 86 places, 99 transitions, 650 flow. Second operand 10 states and 123 transitions. [2021-10-15 20:27:29,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 70 transitions, 554 flow [2021-10-15 20:27:29,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 493 flow, removed 20 selfloop flow, removed 13 redundant places. [2021-10-15 20:27:29,572 INFO L242 Difference]: Finished difference. Result has 75 places, 69 transitions, 393 flow [2021-10-15 20:27:29,572 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=393, PETRI_PLACES=75, PETRI_TRANSITIONS=69} [2021-10-15 20:27:29,572 INFO L334 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2021-10-15 20:27:29,573 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 69 transitions, 393 flow [2021-10-15 20:27:29,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.041666666666666) internal successors, (265), 24 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:29,573 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:29,573 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:29,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:27:29,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-15 20:27:29,800 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:29,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:29,801 INFO L82 PathProgramCache]: Analyzing trace with hash 93482631, now seen corresponding path program 1 times [2021-10-15 20:27:29,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:29,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976083040] [2021-10-15 20:27:29,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:29,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:27:30,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:30,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976083040] [2021-10-15 20:27:30,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976083040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:30,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768739225] [2021-10-15 20:27:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:30,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:30,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:30,076 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:27:30,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 20:27:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:30,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 20:27:30,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:27:30,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-15 20:27:30,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-15 20:27:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:27:30,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768739225] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:30,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:27:30,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-10-15 20:27:30,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507499866] [2021-10-15 20:27:30,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:27:30,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:30,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:27:30,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:27:30,479 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2021-10-15 20:27:30,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 69 transitions, 393 flow. Second operand has 16 states, 16 states have (on average 17.9375) internal successors, (287), 16 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:30,480 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:30,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2021-10-15 20:27:30,480 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:31,222 INFO L129 PetriNetUnfolder]: 24/145 cut-off events. [2021-10-15 20:27:31,222 INFO L130 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2021-10-15 20:27:31,223 INFO L84 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 145 events. 24/145 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 485 event pairs, 0 based on Foata normal form. 6/151 useless extension candidates. Maximal degree in co-relation 472. Up to 33 conditions per place. [2021-10-15 20:27:31,225 INFO L132 encePairwiseOnDemand]: 31/51 looper letters, 42 selfloop transitions, 50 changer transitions 0/105 dead transitions. [2021-10-15 20:27:31,225 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 105 transitions, 761 flow [2021-10-15 20:27:31,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 20:27:31,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-15 20:27:31,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 327 transitions. [2021-10-15 20:27:31,228 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4007352941176471 [2021-10-15 20:27:31,229 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 327 transitions. [2021-10-15 20:27:31,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 327 transitions. [2021-10-15 20:27:31,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:31,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 327 transitions. [2021-10-15 20:27:31,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 20.4375) internal successors, (327), 16 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:31,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 51.0) internal successors, (867), 17 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:31,235 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 51.0) internal successors, (867), 17 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:31,235 INFO L186 Difference]: Start difference. First operand has 75 places, 69 transitions, 393 flow. Second operand 16 states and 327 transitions. [2021-10-15 20:27:31,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 105 transitions, 761 flow [2021-10-15 20:27:31,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 105 transitions, 746 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-10-15 20:27:31,243 INFO L242 Difference]: Finished difference. Result has 86 places, 91 transitions, 663 flow [2021-10-15 20:27:31,244 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=663, PETRI_PLACES=86, PETRI_TRANSITIONS=91} [2021-10-15 20:27:31,244 INFO L334 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2021-10-15 20:27:31,244 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 91 transitions, 663 flow [2021-10-15 20:27:31,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 17.9375) internal successors, (287), 16 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:31,245 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:31,245 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:31,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:27:31,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:31,460 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:31,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:31,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1064810912, now seen corresponding path program 1 times [2021-10-15 20:27:31,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:31,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337141772] [2021-10-15 20:27:31,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:31,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 20:27:31,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:31,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337141772] [2021-10-15 20:27:31,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337141772] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:31,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049252944] [2021-10-15 20:27:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:31,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:31,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:31,803 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:27:31,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 20:27:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:31,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-15 20:27:31,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:27:31,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 291 [2021-10-15 20:27:32,390 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-15 20:27:32,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 43 [2021-10-15 20:27:32,409 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-15 20:27:32,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 19 [2021-10-15 20:27:32,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-10-15 20:27:32,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-15 20:27:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-15 20:27:32,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049252944] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:32,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:27:32,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-15 20:27:32,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495995029] [2021-10-15 20:27:32,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-15 20:27:32,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:32,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-15 20:27:32,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-10-15 20:27:32,826 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 51 [2021-10-15 20:27:32,827 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 91 transitions, 663 flow. Second operand has 19 states, 19 states have (on average 11.421052631578947) internal successors, (217), 19 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:32,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:32,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 51 [2021-10-15 20:27:32,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:33,761 INFO L129 PetriNetUnfolder]: 9/68 cut-off events. [2021-10-15 20:27:33,761 INFO L130 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2021-10-15 20:27:33,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 68 events. 9/68 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 92 event pairs, 0 based on Foata normal form. 2/70 useless extension candidates. Maximal degree in co-relation 278. Up to 33 conditions per place. [2021-10-15 20:27:33,762 INFO L132 encePairwiseOnDemand]: 33/51 looper letters, 32 selfloop transitions, 17 changer transitions 0/59 dead transitions. [2021-10-15 20:27:33,763 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 59 transitions, 502 flow [2021-10-15 20:27:33,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 20:27:33,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-15 20:27:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 183 transitions. [2021-10-15 20:27:33,766 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.22426470588235295 [2021-10-15 20:27:33,766 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 183 transitions. [2021-10-15 20:27:33,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 183 transitions. [2021-10-15 20:27:33,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:33,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 183 transitions. [2021-10-15 20:27:33,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 11.4375) internal successors, (183), 16 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:33,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 51.0) internal successors, (867), 17 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:33,771 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 51.0) internal successors, (867), 17 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:33,771 INFO L186 Difference]: Start difference. First operand has 86 places, 91 transitions, 663 flow. Second operand 16 states and 183 transitions. [2021-10-15 20:27:33,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 59 transitions, 502 flow [2021-10-15 20:27:33,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 59 transitions, 393 flow, removed 30 selfloop flow, removed 17 redundant places. [2021-10-15 20:27:33,792 INFO L242 Difference]: Finished difference. Result has 78 places, 58 transitions, 335 flow [2021-10-15 20:27:33,792 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=335, PETRI_PLACES=78, PETRI_TRANSITIONS=58} [2021-10-15 20:27:33,793 INFO L334 CegarLoopForPetriNet]: 31 programPoint places, 47 predicate places. [2021-10-15 20:27:33,793 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 58 transitions, 335 flow [2021-10-15 20:27:33,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.421052631578947) internal successors, (217), 19 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:33,793 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:33,794 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:33,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 20:27:34,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:34,009 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:34,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:34,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2098228492, now seen corresponding path program 1 times [2021-10-15 20:27:34,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:34,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250992499] [2021-10-15 20:27:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:34,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 20:27:34,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:34,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250992499] [2021-10-15 20:27:34,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250992499] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:34,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168061800] [2021-10-15 20:27:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:34,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:34,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:34,063 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:27:34,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 20:27:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:34,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 20:27:34,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:27:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 20:27:34,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168061800] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:27:34,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:27:34,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2021-10-15 20:27:34,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747406575] [2021-10-15 20:27:34,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:27:34,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:34,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:27:34,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:27:34,479 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 51 [2021-10-15 20:27:34,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 58 transitions, 335 flow. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:34,480 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:34,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 51 [2021-10-15 20:27:34,480 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:34,537 INFO L129 PetriNetUnfolder]: 5/67 cut-off events. [2021-10-15 20:27:34,537 INFO L130 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2021-10-15 20:27:34,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 67 events. 5/67 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 4/71 useless extension candidates. Maximal degree in co-relation 211. Up to 12 conditions per place. [2021-10-15 20:27:34,539 INFO L132 encePairwiseOnDemand]: 45/51 looper letters, 13 selfloop transitions, 7 changer transitions 9/55 dead transitions. [2021-10-15 20:27:34,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 55 transitions, 371 flow [2021-10-15 20:27:34,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:27:34,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:27:34,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2021-10-15 20:27:34,543 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7098039215686275 [2021-10-15 20:27:34,543 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 181 transitions. [2021-10-15 20:27:34,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 181 transitions. [2021-10-15 20:27:34,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:34,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 181 transitions. [2021-10-15 20:27:34,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 36.2) internal successors, (181), 5 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:34,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:34,546 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:34,547 INFO L186 Difference]: Start difference. First operand has 78 places, 58 transitions, 335 flow. Second operand 5 states and 181 transitions. [2021-10-15 20:27:34,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 55 transitions, 371 flow [2021-10-15 20:27:34,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 55 transitions, 325 flow, removed 3 selfloop flow, removed 17 redundant places. [2021-10-15 20:27:34,551 INFO L242 Difference]: Finished difference. Result has 64 places, 44 transitions, 228 flow [2021-10-15 20:27:34,552 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=228, PETRI_PLACES=64, PETRI_TRANSITIONS=44} [2021-10-15 20:27:34,552 INFO L334 CegarLoopForPetriNet]: 31 programPoint places, 33 predicate places. [2021-10-15 20:27:34,552 INFO L470 AbstractCegarLoop]: Abstraction has has 64 places, 44 transitions, 228 flow [2021-10-15 20:27:34,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:34,553 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:34,553 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:34,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 20:27:34,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:34,765 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:34,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:34,765 INFO L82 PathProgramCache]: Analyzing trace with hash 591619839, now seen corresponding path program 1 times [2021-10-15 20:27:34,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:34,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241685242] [2021-10-15 20:27:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:34,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 20:27:35,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:35,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241685242] [2021-10-15 20:27:35,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241685242] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:35,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068277476] [2021-10-15 20:27:35,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:35,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:35,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:35,456 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:27:35,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 20:27:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:35,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-15 20:27:35,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:27:35,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 395 treesize of output 387 [2021-10-15 20:27:36,277 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-15 20:27:36,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2021-10-15 20:27:36,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-10-15 20:27:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 20:27:36,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068277476] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:36,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:27:36,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-10-15 20:27:36,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461589536] [2021-10-15 20:27:36,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:27:36,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:36,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:27:36,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:27:36,458 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2021-10-15 20:27:36,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 44 transitions, 228 flow. Second operand has 16 states, 16 states have (on average 18.875) internal successors, (302), 16 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:36,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:36,459 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2021-10-15 20:27:36,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:36,942 INFO L129 PetriNetUnfolder]: 2/49 cut-off events. [2021-10-15 20:27:36,942 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2021-10-15 20:27:36,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 49 events. 2/49 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 16 event pairs, 0 based on Foata normal form. 2/51 useless extension candidates. Maximal degree in co-relation 165. Up to 9 conditions per place. [2021-10-15 20:27:36,942 INFO L132 encePairwiseOnDemand]: 38/51 looper letters, 18 selfloop transitions, 12 changer transitions 7/46 dead transitions. [2021-10-15 20:27:36,942 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 46 transitions, 308 flow [2021-10-15 20:27:36,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 20:27:36,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 20:27:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 253 transitions. [2021-10-15 20:27:36,946 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3815987933634992 [2021-10-15 20:27:36,946 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 253 transitions. [2021-10-15 20:27:36,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 253 transitions. [2021-10-15 20:27:36,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:36,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 253 transitions. [2021-10-15 20:27:36,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 19.46153846153846) internal successors, (253), 13 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:36,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 51.0) internal successors, (714), 14 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:36,953 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 51.0) internal successors, (714), 14 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:36,953 INFO L186 Difference]: Start difference. First operand has 64 places, 44 transitions, 228 flow. Second operand 13 states and 253 transitions. [2021-10-15 20:27:36,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 46 transitions, 308 flow [2021-10-15 20:27:36,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 46 transitions, 279 flow, removed 9 selfloop flow, removed 5 redundant places. [2021-10-15 20:27:36,962 INFO L242 Difference]: Finished difference. Result has 73 places, 39 transitions, 207 flow [2021-10-15 20:27:36,963 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=207, PETRI_PLACES=73, PETRI_TRANSITIONS=39} [2021-10-15 20:27:36,963 INFO L334 CegarLoopForPetriNet]: 31 programPoint places, 42 predicate places. [2021-10-15 20:27:36,964 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 39 transitions, 207 flow [2021-10-15 20:27:36,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 18.875) internal successors, (302), 16 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:36,964 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:36,965 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 20:27:37,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 20:27:37,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 20:27:37,189 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:37,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:37,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1631106707, now seen corresponding path program 1 times [2021-10-15 20:27:37,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:37,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874921812] [2021-10-15 20:27:37,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:37,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:27:38,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:38,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874921812] [2021-10-15 20:27:38,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874921812] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:38,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795830956] [2021-10-15 20:27:38,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:38,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:38,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:38,110 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:27:38,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 20:27:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:27:38,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-15 20:27:38,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:27:38,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 402 treesize of output 394 [2021-10-15 20:27:38,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 11 [2021-10-15 20:27:39,022 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-10-15 20:27:39,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-10-15 20:27:39,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-15 20:27:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 20:27:39,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795830956] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:39,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:27:39,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 29 [2021-10-15 20:27:39,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948395422] [2021-10-15 20:27:39,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-15 20:27:39,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:39,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-15 20:27:39,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-10-15 20:27:39,177 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 51 [2021-10-15 20:27:39,178 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 39 transitions, 207 flow. Second operand has 30 states, 30 states have (on average 11.133333333333333) internal successors, (334), 30 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:39,178 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:39,178 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 51 [2021-10-15 20:27:39,178 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:39,824 INFO L129 PetriNetUnfolder]: 1/27 cut-off events. [2021-10-15 20:27:39,824 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2021-10-15 20:27:39,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 27 events. 1/27 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 1/28 useless extension candidates. Maximal degree in co-relation 96. Up to 5 conditions per place. [2021-10-15 20:27:39,825 INFO L132 encePairwiseOnDemand]: 38/51 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2021-10-15 20:27:39,825 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 26 transitions, 182 flow [2021-10-15 20:27:39,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 20:27:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 20:27:39,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 139 transitions. [2021-10-15 20:27:39,826 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2096530920060332 [2021-10-15 20:27:39,826 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 139 transitions. [2021-10-15 20:27:39,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 139 transitions. [2021-10-15 20:27:39,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:39,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 139 transitions. [2021-10-15 20:27:39,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 10.692307692307692) internal successors, (139), 13 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:39,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 51.0) internal successors, (714), 14 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:39,829 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 51.0) internal successors, (714), 14 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:39,829 INFO L186 Difference]: Start difference. First operand has 73 places, 39 transitions, 207 flow. Second operand 13 states and 139 transitions. [2021-10-15 20:27:39,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 26 transitions, 182 flow [2021-10-15 20:27:39,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 26 transitions, 136 flow, removed 2 selfloop flow, removed 19 redundant places. [2021-10-15 20:27:39,830 INFO L242 Difference]: Finished difference. Result has 51 places, 0 transitions, 0 flow [2021-10-15 20:27:39,831 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=0, PETRI_PLACES=51, PETRI_TRANSITIONS=0} [2021-10-15 20:27:39,831 INFO L334 CegarLoopForPetriNet]: 31 programPoint places, 20 predicate places. [2021-10-15 20:27:39,831 INFO L470 AbstractCegarLoop]: Abstraction has has 51 places, 0 transitions, 0 flow [2021-10-15 20:27:39,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 11.133333333333333) internal successors, (334), 30 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:39,834 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:27:39,834 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:27:39,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 20:27:40,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 20:27:40,053 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:27:40,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:27:40 BoogieIcfgContainer [2021-10-15 20:27:40,058 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:27:40,058 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:27:40,058 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:27:40,059 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:27:40,059 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:27:16" (3/4) ... [2021-10-15 20:27:40,062 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:27:40,075 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-15 20:27:40,075 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:27:40,076 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:27:40,076 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:27:40,120 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:27:40,120 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:27:40,121 INFO L168 Benchmark]: Toolchain (without parser) took 24436.76 ms. Allocated memory was 92.3 MB in the beginning and 197.1 MB in the end (delta: 104.9 MB). Free memory was 54.2 MB in the beginning and 61.0 MB in the end (delta: -6.8 MB). Peak memory consumption was 96.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:27:40,121 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 92.3 MB. Free memory is still 70.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:27:40,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 467.16 ms. Allocated memory is still 92.3 MB. Free memory was 54.0 MB in the beginning and 68.2 MB in the end (delta: -14.2 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2021-10-15 20:27:40,122 INFO L168 Benchmark]: Boogie Procedure Inliner took 78.92 ms. Allocated memory is still 92.3 MB. Free memory was 68.2 MB in the beginning and 66.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:27:40,123 INFO L168 Benchmark]: Boogie Preprocessor took 66.64 ms. Allocated memory is still 92.3 MB. Free memory was 66.4 MB in the beginning and 64.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:27:40,123 INFO L168 Benchmark]: RCFGBuilder took 508.34 ms. Allocated memory is still 92.3 MB. Free memory was 64.8 MB in the beginning and 51.0 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 20:27:40,124 INFO L168 Benchmark]: TraceAbstraction took 23242.25 ms. Allocated memory was 92.3 MB in the beginning and 197.1 MB in the end (delta: 104.9 MB). Free memory was 50.5 MB in the beginning and 65.2 MB in the end (delta: -14.7 MB). Peak memory consumption was 90.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:27:40,124 INFO L168 Benchmark]: Witness Printer took 61.92 ms. Allocated memory is still 197.1 MB. Free memory was 65.2 MB in the beginning and 61.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:27:40,126 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 92.3 MB. Free memory is still 70.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 467.16 ms. Allocated memory is still 92.3 MB. Free memory was 54.0 MB in the beginning and 68.2 MB in the end (delta: -14.2 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 78.92 ms. Allocated memory is still 92.3 MB. Free memory was 68.2 MB in the beginning and 66.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 66.64 ms. Allocated memory is still 92.3 MB. Free memory was 66.4 MB in the beginning and 64.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 508.34 ms. Allocated memory is still 92.3 MB. Free memory was 64.8 MB in the beginning and 51.0 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 23242.25 ms. Allocated memory was 92.3 MB in the beginning and 197.1 MB in the end (delta: 104.9 MB). Free memory was 50.5 MB in the beginning and 65.2 MB in the end (delta: -14.7 MB). Peak memory consumption was 90.9 MB. Max. memory is 16.1 GB. * Witness Printer took 61.92 ms. Allocated memory is still 197.1 MB. Free memory was 65.2 MB in the beginning and 61.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms 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: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 8]: 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, 35 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 13.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 23122.9ms, OverallIterations: 14, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 8795.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 83.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 109 SDtfs, 650 SDslu, 504 SDs, 0 SdLazy, 1907 SolverSat, 271 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 4192.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 443 GetRequests, 232 SyntacticMatches, 8 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 6048.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=663occurred in iteration=10, InterpolantAutomatonStates: 127, 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: 210.7ms SsaConstructionTime, 1122.1ms SatisfiabilityAnalysisTime, 9043.8ms InterpolantComputationTime, 621 NumberOfCodeBlocks, 621 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 597 ConstructedInterpolants, 14 QuantifiedInterpolants, 6267 SizeOfPredicates, 87 NumberOfNonLiveVariables, 1892 ConjunctsInSsa, 195 ConjunctsInUnsatCore, 24 InterpolantComputations, 7 PerfectInterpolantSequences, 115/176 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 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:27:40,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1c793f3-6b40-4190-8f7c-bcc218bef2d0/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...