./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cf0bb070a6f67963fcaf42c16427fd9b591ad6ca597a21a650e9cf23fa51a6dd ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:44:44,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:44:44,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:44:44,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:44:44,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:44:44,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:44:44,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:44:44,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:44:44,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:44:44,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:44:44,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:44:44,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:44:44,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:44:44,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:44:44,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:44:44,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:44:44,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:44:44,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:44:44,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:44:44,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:44:44,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:44:44,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:44:44,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:44:44,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:44:44,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:44:44,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:44:44,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:44:44,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:44:44,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:44:44,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:44:44,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:44:44,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:44:44,849 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:44:44,850 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:44:44,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:44:44,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:44:44,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:44:44,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:44:44,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:44:44,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:44:44,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:44:44,856 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:44:44,899 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:44:44,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:44:44,903 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:44:44,903 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:44:44,911 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:44:44,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:44:44,912 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:44:44,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:44:44,913 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:44:44,913 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:44:44,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:44:44,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:44:44,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:44:44,915 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:44:44,915 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:44:44,915 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:44:44,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:44:44,915 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:44:44,916 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:44:44,916 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:44:44,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:44:44,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:44:44,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:44:44,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:44:44,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:44:44,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:44:44,918 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:44:44,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:44:44,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:44:44,920 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_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf0bb070a6f67963fcaf42c16427fd9b591ad6ca597a21a650e9cf23fa51a6dd [2021-10-21 19:44:45,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:44:45,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:44:45,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:44:45,248 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:44:45,249 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:44:45,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2021-10-21 19:44:45,320 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/data/0a8742d3d/3c03e51f94ed480db88efafa078102e5/FLAGad81912b6 [2021-10-21 19:44:45,789 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:44:45,789 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2021-10-21 19:44:45,794 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/data/0a8742d3d/3c03e51f94ed480db88efafa078102e5/FLAGad81912b6 [2021-10-21 19:44:46,187 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/data/0a8742d3d/3c03e51f94ed480db88efafa078102e5 [2021-10-21 19:44:46,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:44:46,191 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:44:46,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:44:46,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:44:46,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:44:46,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:44:46" (1/1) ... [2021-10-21 19:44:46,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be60ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:44:46, skipping insertion in model container [2021-10-21 19:44:46,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:44:46" (1/1) ... [2021-10-21 19:44:46,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:44:46,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:44:46,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:44:46,399 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:44:46,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:44:46,449 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:44:46,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:44:46 WrapperNode [2021-10-21 19:44:46,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:44:46,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:44:46,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:44:46,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:44:46,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:44:46" (1/1) ... [2021-10-21 19:44:46,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:44:46" (1/1) ... [2021-10-21 19:44:46,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:44:46" (1/1) ... [2021-10-21 19:44:46,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:44:46" (1/1) ... [2021-10-21 19:44:46,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:44:46" (1/1) ... [2021-10-21 19:44:46,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:44:46" (1/1) ... [2021-10-21 19:44:46,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:44:46" (1/1) ... [2021-10-21 19:44:46,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:44:46,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:44:46,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:44:46,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:44:46,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:44:46" (1/1) ... [2021-10-21 19:44:46,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:44:46,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:46,524 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:44:46,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:44:46,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:44:46,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:44:46,565 INFO L138 BoogieDeclarations]: Found implementation of procedure getNumbers [2021-10-21 19:44:46,565 INFO L138 BoogieDeclarations]: Found implementation of procedure getNumbers2 [2021-10-21 19:44:46,566 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:44:46,566 INFO L130 BoogieDeclarations]: Found specification of procedure getNumbers [2021-10-21 19:44:46,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:44:46,566 INFO L130 BoogieDeclarations]: Found specification of procedure getNumbers2 [2021-10-21 19:44:46,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:44:46,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:44:46,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:44:46,567 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:44:46,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:44:46,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:44:46,778 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:44:46,779 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-21 19:44:46,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:44:46 BoogieIcfgContainer [2021-10-21 19:44:46,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:44:46,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:44:46,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:44:46,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:44:46,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:44:46" (1/3) ... [2021-10-21 19:44:46,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@261661e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:44:46, skipping insertion in model container [2021-10-21 19:44:46,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:44:46" (2/3) ... [2021-10-21 19:44:46,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@261661e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:44:46, skipping insertion in model container [2021-10-21 19:44:46,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:44:46" (3/3) ... [2021-10-21 19:44:46,790 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers2.c [2021-10-21 19:44:46,809 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:44:46,810 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-10-21 19:44:46,857 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:44:46,864 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-10-21 19:44:46,864 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-10-21 19:44:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.619047619047619) internal successors, (34), 30 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:44:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:44:46,910 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:46,911 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:46,912 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting getNumbersErr1REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:44:46,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:46,918 INFO L82 PathProgramCache]: Analyzing trace with hash -262167437, now seen corresponding path program 1 times [2021-10-21 19:44:46,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:46,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259162071] [2021-10-21 19:44:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:46,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:47,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:44:47,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:47,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259162071] [2021-10-21 19:44:47,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259162071] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:44:47,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:44:47,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:44:47,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916465084] [2021-10-21 19:44:47,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:44:47,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:47,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:44:47,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:44:47,318 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.619047619047619) internal successors, (34), 30 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:44:47,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:47,564 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-10-21 19:44:47,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:44:47,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-21 19:44:47,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:47,576 INFO L225 Difference]: With dead ends: 43 [2021-10-21 19:44:47,577 INFO L226 Difference]: Without dead ends: 40 [2021-10-21 19:44:47,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:44:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-21 19:44:47,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-10-21 19:44:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.5) internal successors, (33), 30 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:44:47,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-10-21 19:44:47,613 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 10 [2021-10-21 19:44:47,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:47,614 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-10-21 19:44:47,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:44:47,614 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-10-21 19:44:47,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:44:47,615 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:47,615 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:47,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:44:47,615 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting getNumbersErr0REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:44:47,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:47,616 INFO L82 PathProgramCache]: Analyzing trace with hash -262167438, now seen corresponding path program 1 times [2021-10-21 19:44:47,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:47,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131498107] [2021-10-21 19:44:47,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:47,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:47,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:44:47,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:47,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131498107] [2021-10-21 19:44:47,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131498107] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:44:47,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:44:47,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:44:47,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824919187] [2021-10-21 19:44:47,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:44:47,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:47,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:44:47,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:44:47,750 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 4 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:44:47,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:47,873 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-10-21 19:44:47,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:44:47,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-21 19:44:47,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:47,878 INFO L225 Difference]: With dead ends: 37 [2021-10-21 19:44:47,879 INFO L226 Difference]: Without dead ends: 37 [2021-10-21 19:44:47,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:44:47,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-21 19:44:47,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-21 19:44:47,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 29 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:44:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-10-21 19:44:47,893 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 10 [2021-10-21 19:44:47,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:47,894 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-10-21 19:44:47,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:44:47,895 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-10-21 19:44:47,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:44:47,896 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:47,896 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:47,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:44:47,897 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting getNumbersErr1REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:44:47,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:47,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1979581628, now seen corresponding path program 1 times [2021-10-21 19:44:47,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:47,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774994171] [2021-10-21 19:44:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:47,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:48,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:44:48,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:48,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774994171] [2021-10-21 19:44:48,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774994171] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:48,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995709704] [2021-10-21 19:44:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:48,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:48,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:48,161 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:48,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:44:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:48,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:44:48,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:48,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-21 19:44:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:44:48,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995709704] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:48,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:48,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-21 19:44:48,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458463120] [2021-10-21 19:44:48,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:44:48,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:48,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:44:48,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:44:48,438 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:44:48,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:48,581 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-10-21 19:44:48,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:44:48,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-21 19:44:48,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:48,582 INFO L225 Difference]: With dead ends: 41 [2021-10-21 19:44:48,583 INFO L226 Difference]: Without dead ends: 41 [2021-10-21 19:44:48,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:44:48,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-21 19:44:48,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-10-21 19:44:48,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.36) internal successors, (34), 32 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:44:48,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-10-21 19:44:48,589 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 13 [2021-10-21 19:44:48,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:48,589 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-10-21 19:44:48,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:44:48,590 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-10-21 19:44:48,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 19:44:48,590 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:48,590 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:48,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:44:48,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:48,805 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting getNumbersErr1REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:44:48,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:48,806 INFO L82 PathProgramCache]: Analyzing trace with hash 479651539, now seen corresponding path program 2 times [2021-10-21 19:44:48,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:48,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414960660] [2021-10-21 19:44:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:48,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:48,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:44:48,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:48,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414960660] [2021-10-21 19:44:48,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414960660] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:48,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124472824] [2021-10-21 19:44:48,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:44:48,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:48,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:48,956 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:48,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:44:49,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:44:49,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:44:49,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:44:49,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:49,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-21 19:44:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:44:49,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124472824] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:44:49,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:44:49,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2021-10-21 19:44:49,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638961935] [2021-10-21 19:44:49,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:44:49,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:49,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:44:49,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:44:49,310 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:44:49,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:49,409 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-10-21 19:44:49,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:44:49,409 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-21 19:44:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:49,412 INFO L225 Difference]: With dead ends: 40 [2021-10-21 19:44:49,412 INFO L226 Difference]: Without dead ends: 40 [2021-10-21 19:44:49,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:44:49,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-21 19:44:49,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-10-21 19:44:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 30 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:44:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-10-21 19:44:49,426 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 16 [2021-10-21 19:44:49,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:49,427 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-10-21 19:44:49,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:44:49,428 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-10-21 19:44:49,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:44:49,429 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:49,429 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:49,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-21 19:44:49,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:49,643 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting getNumbers2Err0REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:44:49,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:49,644 INFO L82 PathProgramCache]: Analyzing trace with hash -680983352, now seen corresponding path program 1 times [2021-10-21 19:44:49,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:49,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961002702] [2021-10-21 19:44:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:49,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:49,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:49,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:44:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:44:49,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:49,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961002702] [2021-10-21 19:44:49,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961002702] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:49,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396759717] [2021-10-21 19:44:49,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:49,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:49,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:49,736 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:49,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:44:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:49,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:44:49,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:44:49,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396759717] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:49,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:49,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2021-10-21 19:44:49,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034165378] [2021-10-21 19:44:49,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:44:49,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:49,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:44:49,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:44:49,903 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:44:49,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:49,994 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-10-21 19:44:49,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:44:49,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-10-21 19:44:49,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:49,998 INFO L225 Difference]: With dead ends: 43 [2021-10-21 19:44:49,998 INFO L226 Difference]: Without dead ends: 43 [2021-10-21 19:44:49,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:44:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-21 19:44:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-10-21 19:44:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 33 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:44:50,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-10-21 19:44:50,008 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 21 [2021-10-21 19:44:50,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:50,008 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-10-21 19:44:50,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:44:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-10-21 19:44:50,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:44:50,010 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:50,010 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:50,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:44:50,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:50,225 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting getNumbers2Err0REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:44:50,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:50,225 INFO L82 PathProgramCache]: Analyzing trace with hash 974975319, now seen corresponding path program 2 times [2021-10-21 19:44:50,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:50,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558067868] [2021-10-21 19:44:50,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:50,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:50,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:50,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:44:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:44:50,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:50,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558067868] [2021-10-21 19:44:50,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558067868] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:50,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975970731] [2021-10-21 19:44:50,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:44:50,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:50,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:50,330 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:50,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:44:50,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-21 19:44:50,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:44:50,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:44:50,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:50,434 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:44:50,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 19:44:50,777 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-10-21 19:44:50,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 38 [2021-10-21 19:44:50,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:44:50,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975970731] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:44:50,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:44:50,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2021-10-21 19:44:50,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360392816] [2021-10-21 19:44:50,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:44:50,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:50,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:44:50,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:44:50,926 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:44:51,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:51,030 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-10-21 19:44:51,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:44:51,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-10-21 19:44:51,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:51,032 INFO L225 Difference]: With dead ends: 40 [2021-10-21 19:44:51,032 INFO L226 Difference]: Without dead ends: 40 [2021-10-21 19:44:51,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:44:51,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-21 19:44:51,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-21 19:44:51,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 32 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:44:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-10-21 19:44:51,037 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 24 [2021-10-21 19:44:51,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:51,037 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-10-21 19:44:51,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:44:51,038 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-10-21 19:44:51,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:44:51,039 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:51,039 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:51,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:44:51,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-21 19:44:51,261 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting getNumbers2Err1REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:44:51,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:51,261 INFO L82 PathProgramCache]: Analyzing trace with hash 974975320, now seen corresponding path program 1 times [2021-10-21 19:44:51,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:51,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037282581] [2021-10-21 19:44:51,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:51,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:51,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:51,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:44:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:44:51,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:51,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037282581] [2021-10-21 19:44:51,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037282581] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:51,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640334789] [2021-10-21 19:44:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:51,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:51,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:51,348 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:51,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:44:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:51,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:44:51,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:44:51,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640334789] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:51,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:51,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-10-21 19:44:51,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826654511] [2021-10-21 19:44:51,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:44:51,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:51,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:44:51,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:44:51,541 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:44:51,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:51,639 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-10-21 19:44:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:44:51,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-10-21 19:44:51,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:51,642 INFO L225 Difference]: With dead ends: 45 [2021-10-21 19:44:51,644 INFO L226 Difference]: Without dead ends: 45 [2021-10-21 19:44:51,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:44:51,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-21 19:44:51,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-10-21 19:44:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 35 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:44:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-10-21 19:44:51,657 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 24 [2021-10-21 19:44:51,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:51,658 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-10-21 19:44:51,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:44:51,658 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-10-21 19:44:51,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:44:51,659 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:51,659 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:51,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:44:51,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-21 19:44:51,881 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting getNumbers2Err1REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:44:51,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:51,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1645381225, now seen corresponding path program 2 times [2021-10-21 19:44:51,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:51,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631860791] [2021-10-21 19:44:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:51,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:51,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:51,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:44:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:44:51,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:51,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631860791] [2021-10-21 19:44:51,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631860791] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:51,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949457251] [2021-10-21 19:44:51,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:44:51,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:51,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:51,970 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:51,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:44:52,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-21 19:44:52,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:44:52,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:44:52,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:52,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-21 19:44:52,310 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:44:52,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-10-21 19:44:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:44:52,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949457251] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:44:52,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:44:52,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2021-10-21 19:44:52,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732474425] [2021-10-21 19:44:52,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:44:52,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:52,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:44:52,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:44:52,356 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:44:52,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:52,455 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-10-21 19:44:52,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:44:52,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-10-21 19:44:52,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:52,457 INFO L225 Difference]: With dead ends: 50 [2021-10-21 19:44:52,457 INFO L226 Difference]: Without dead ends: 50 [2021-10-21 19:44:52,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:44:52,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-21 19:44:52,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-10-21 19:44:52,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.21875) internal successors, (39), 37 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:44:52,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-10-21 19:44:52,464 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 27 [2021-10-21 19:44:52,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:52,467 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-10-21 19:44:52,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:44:52,467 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-10-21 19:44:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:44:52,468 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:52,469 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:52,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:44:52,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:52,693 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting getNumbers2Err2REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:44:52,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:52,693 INFO L82 PathProgramCache]: Analyzing trace with hash -532789623, now seen corresponding path program 1 times [2021-10-21 19:44:52,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:52,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756966087] [2021-10-21 19:44:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:52,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:52,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:52,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:44:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-21 19:44:52,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:52,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756966087] [2021-10-21 19:44:52,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756966087] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:44:52,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:44:52,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:44:52,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881708156] [2021-10-21 19:44:52,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:44:52,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:52,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:44:52,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:44:52,760 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:44:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:52,819 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-10-21 19:44:52,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:44:52,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-10-21 19:44:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:52,821 INFO L225 Difference]: With dead ends: 44 [2021-10-21 19:44:52,821 INFO L226 Difference]: Without dead ends: 44 [2021-10-21 19:44:52,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:44:52,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-21 19:44:52,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-21 19:44:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.1875) internal successors, (38), 36 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:44:52,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-10-21 19:44:52,833 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 28 [2021-10-21 19:44:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:52,834 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-10-21 19:44:52,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:44:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-10-21 19:44:52,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:44:52,838 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:52,838 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:52,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 19:44:52,838 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting getNumbers2Err3REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:44:52,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:52,839 INFO L82 PathProgramCache]: Analyzing trace with hash -532789622, now seen corresponding path program 1 times [2021-10-21 19:44:52,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:52,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894956306] [2021-10-21 19:44:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:52,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:52,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:52,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:44:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:44:52,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:52,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894956306] [2021-10-21 19:44:52,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894956306] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:52,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71162244] [2021-10-21 19:44:52,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:52,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:52,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:52,961 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:52,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:44:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:53,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:44:53,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:44:53,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71162244] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:53,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:53,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 9 [2021-10-21 19:44:53,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420255348] [2021-10-21 19:44:53,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:44:53,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:53,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:44:53,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:44:53,177 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:44:53,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:53,261 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-10-21 19:44:53,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:44:53,262 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-10-21 19:44:53,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:53,263 INFO L225 Difference]: With dead ends: 49 [2021-10-21 19:44:53,263 INFO L226 Difference]: Without dead ends: 49 [2021-10-21 19:44:53,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:44:53,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-21 19:44:53,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-10-21 19:44:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:44:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-10-21 19:44:53,275 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 28 [2021-10-21 19:44:53,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:53,276 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-10-21 19:44:53,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:44:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-10-21 19:44:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 19:44:53,279 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:53,279 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:53,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:44:53,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 19:44:53,505 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting getNumbers2Err3REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:44:53,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:53,505 INFO L82 PathProgramCache]: Analyzing trace with hash 978381595, now seen corresponding path program 2 times [2021-10-21 19:44:53,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:53,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260746640] [2021-10-21 19:44:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:53,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:53,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:53,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:44:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:44:53,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:53,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260746640] [2021-10-21 19:44:53,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260746640] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:53,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45792829] [2021-10-21 19:44:53,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:44:53,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:53,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:53,618 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:53,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:44:53,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-21 19:44:53,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:44:53,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:44:53,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:53,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-21 19:44:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-21 19:44:53,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45792829] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:44:53,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:44:53,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [10] total 11 [2021-10-21 19:44:53,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213417573] [2021-10-21 19:44:53,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:44:53,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:53,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:44:53,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:44:53,865 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:44:53,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:53,885 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-10-21 19:44:53,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:44:53,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2021-10-21 19:44:53,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:53,887 INFO L225 Difference]: With dead ends: 50 [2021-10-21 19:44:53,887 INFO L226 Difference]: Without dead ends: 50 [2021-10-21 19:44:53,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:44:53,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-21 19:44:53,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-10-21 19:44:53,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 40 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:44:53,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-10-21 19:44:53,890 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 31 [2021-10-21 19:44:53,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:53,890 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-10-21 19:44:53,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:44:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-10-21 19:44:53,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-21 19:44:53,891 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:53,891 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:53,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:44:54,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:54,101 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting getNumbers2Err1REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:44:54,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:54,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2092158530, now seen corresponding path program 1 times [2021-10-21 19:44:54,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:54,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240667876] [2021-10-21 19:44:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:54,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:54,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:54,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:44:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:44:54,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:54,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240667876] [2021-10-21 19:44:54,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240667876] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:54,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261793573] [2021-10-21 19:44:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:54,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:54,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:54,197 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:54,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:44:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:54,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:44:54,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:44:54,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261793573] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:54,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:54,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-10-21 19:44:54,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204079803] [2021-10-21 19:44:54,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:44:54,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:54,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:44:54,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:44:54,453 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:44:54,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:54,539 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-10-21 19:44:54,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:44:54,540 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2021-10-21 19:44:54,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:54,541 INFO L225 Difference]: With dead ends: 53 [2021-10-21 19:44:54,541 INFO L226 Difference]: Without dead ends: 53 [2021-10-21 19:44:54,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:44:54,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-21 19:44:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-10-21 19:44:54,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 43 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:44:54,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-10-21 19:44:54,544 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 35 [2021-10-21 19:44:54,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:54,544 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-10-21 19:44:54,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:44:54,545 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-10-21 19:44:54,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 19:44:54,545 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:54,545 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:54,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:44:54,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:54,765 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting getNumbers2Err1REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:44:54,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:54,765 INFO L82 PathProgramCache]: Analyzing trace with hash 675510285, now seen corresponding path program 2 times [2021-10-21 19:44:54,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:54,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632084236] [2021-10-21 19:44:54,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:54,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:54,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:54,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:44:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:44:54,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:54,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632084236] [2021-10-21 19:44:54,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632084236] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:54,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556966862] [2021-10-21 19:44:54,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:44:54,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:54,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:54,865 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:54,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:44:55,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:44:55,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:44:55,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:44:55,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:44:55,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556966862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:55,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:55,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-10-21 19:44:55,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786025936] [2021-10-21 19:44:55,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:44:55,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:55,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:44:55,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:44:55,129 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:44:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:55,189 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-10-21 19:44:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:44:55,190 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2021-10-21 19:44:55,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:55,194 INFO L225 Difference]: With dead ends: 56 [2021-10-21 19:44:55,194 INFO L226 Difference]: Without dead ends: 56 [2021-10-21 19:44:55,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:44:55,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-21 19:44:55,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-10-21 19:44:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 46 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:44:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-10-21 19:44:55,198 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 38 [2021-10-21 19:44:55,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:55,198 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-10-21 19:44:55,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:44:55,198 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-10-21 19:44:55,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-21 19:44:55,200 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:55,200 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:55,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:44:55,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 19:44:55,417 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting getNumbers2Err1REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:44:55,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:55,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1809996638, now seen corresponding path program 3 times [2021-10-21 19:44:55,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:55,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048279104] [2021-10-21 19:44:55,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:55,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:55,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:55,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:44:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:44:55,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:55,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048279104] [2021-10-21 19:44:55,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048279104] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:55,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702056735] [2021-10-21 19:44:55,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:44:55,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:55,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:55,541 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:55,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:44:55,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:44:55,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:44:55,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-21 19:44:55,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:55,763 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:44:55,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 19:44:55,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-21 19:44:56,557 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:44:56,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 31 treesize of output 33 [2021-10-21 19:44:56,580 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-10-21 19:44:56,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 30 treesize of output 36 [2021-10-21 19:44:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-21 19:44:56,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702056735] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:56,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:56,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 17 [2021-10-21 19:44:56,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131126717] [2021-10-21 19:44:56,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 19:44:56,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:56,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 19:44:56,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:44:56,805 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:44:57,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:57,296 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-10-21 19:44:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:44:57,297 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2021-10-21 19:44:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:57,298 INFO L225 Difference]: With dead ends: 67 [2021-10-21 19:44:57,298 INFO L226 Difference]: Without dead ends: 67 [2021-10-21 19:44:57,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 485.6ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-10-21 19:44:57,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-21 19:44:57,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-10-21 19:44:57,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 53 states have internal predecessors, (55), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:44:57,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-10-21 19:44:57,301 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 41 [2021-10-21 19:44:57,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:57,301 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-10-21 19:44:57,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:44:57,301 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-10-21 19:44:57,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 19:44:57,302 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:57,302 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:57,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:44:57,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 19:44:57,513 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting getNumbers2Err3REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:44:57,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:57,513 INFO L82 PathProgramCache]: Analyzing trace with hash -665591034, now seen corresponding path program 1 times [2021-10-21 19:44:57,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:57,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729856893] [2021-10-21 19:44:57,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:57,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:57,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:57,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:44:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:44:57,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:57,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729856893] [2021-10-21 19:44:57,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729856893] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:57,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388426135] [2021-10-21 19:44:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:57,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:57,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:57,669 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:57,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:44:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:57,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:44:57,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:44:58,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388426135] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:58,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:58,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-10-21 19:44:58,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363662053] [2021-10-21 19:44:58,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:44:58,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:58,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:44:58,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:44:58,064 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 11 states have internal predecessors, (39), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:44:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:58,133 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-10-21 19:44:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:44:58,134 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 11 states have internal predecessors, (39), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2021-10-21 19:44:58,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:58,135 INFO L225 Difference]: With dead ends: 66 [2021-10-21 19:44:58,135 INFO L226 Difference]: Without dead ends: 66 [2021-10-21 19:44:58,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:44:58,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-21 19:44:58,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-10-21 19:44:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 56 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:44:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-10-21 19:44:58,140 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 45 [2021-10-21 19:44:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:58,141 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-10-21 19:44:58,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 11 states have internal predecessors, (39), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:44:58,141 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-10-21 19:44:58,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-21 19:44:58,143 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:58,143 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:58,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:44:58,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:44:58,357 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting getNumbers2Err3REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:44:58,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:58,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1878971029, now seen corresponding path program 2 times [2021-10-21 19:44:58,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:58,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126976674] [2021-10-21 19:44:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:58,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:58,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:58,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:44:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:44:58,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:58,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126976674] [2021-10-21 19:44:58,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126976674] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:58,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582127610] [2021-10-21 19:44:58,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:44:58,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:58,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:58,501 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:58,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:44:58,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-21 19:44:58,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:44:58,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:44:58,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:44:58,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-21 19:44:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-10-21 19:44:59,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582127610] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:59,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:44:59,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 20 [2021-10-21 19:44:59,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511761983] [2021-10-21 19:44:59,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 19:44:59,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:44:59,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 19:44:59,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:44:59,026 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 17 states have internal predecessors, (58), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:44:59,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:44:59,387 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-10-21 19:44:59,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 19:44:59,388 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 17 states have internal predecessors, (58), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2021-10-21 19:44:59,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:44:59,389 INFO L225 Difference]: With dead ends: 66 [2021-10-21 19:44:59,389 INFO L226 Difference]: Without dead ends: 66 [2021-10-21 19:44:59,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 366.1ms TimeCoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 19:44:59,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-21 19:44:59,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-10-21 19:44:59,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 58 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:44:59,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-10-21 19:44:59,392 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 48 [2021-10-21 19:44:59,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:44:59,393 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-10-21 19:44:59,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 17 states have internal predecessors, (58), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:44:59,393 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-10-21 19:44:59,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-21 19:44:59,393 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:44:59,394 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:44:59,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:44:59,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:44:59,594 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting getNumbers2Err1REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:44:59,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:44:59,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1831341513, now seen corresponding path program 4 times [2021-10-21 19:44:59,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:44:59,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012372241] [2021-10-21 19:44:59,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:44:59,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:44:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:59,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:44:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:59,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:44:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:44:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-21 19:44:59,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:44:59,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012372241] [2021-10-21 19:44:59,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012372241] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:44:59,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134015603] [2021-10-21 19:44:59,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:44:59,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:44:59,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:44:59,905 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:44:59,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:45:00,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:45:00,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:45:00,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 19:45:00,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:45:00,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-21 19:45:00,895 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:45:00,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 25 treesize of output 25 [2021-10-21 19:45:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 126 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:45:01,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134015603] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:01,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:45:01,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19] total 25 [2021-10-21 19:45:01,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727148463] [2021-10-21 19:45:01,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-21 19:45:01,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:01,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-21 19:45:01,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-10-21 19:45:01,101 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 26 states, 25 states have (on average 2.52) internal successors, (63), 22 states have internal predecessors, (63), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:45:02,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:45:02,022 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-10-21 19:45:02,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-21 19:45:02,023 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.52) internal successors, (63), 22 states have internal predecessors, (63), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 55 [2021-10-21 19:45:02,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:45:02,024 INFO L225 Difference]: With dead ends: 74 [2021-10-21 19:45:02,024 INFO L226 Difference]: Without dead ends: 74 [2021-10-21 19:45:02,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 894.9ms TimeCoverageRelationStatistics Valid=373, Invalid=1519, Unknown=0, NotChecked=0, Total=1892 [2021-10-21 19:45:02,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-21 19:45:02,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2021-10-21 19:45:02,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 63 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:45:02,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-10-21 19:45:02,028 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 55 [2021-10-21 19:45:02,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:45:02,028 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-10-21 19:45:02,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.52) internal successors, (63), 22 states have internal predecessors, (63), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:45:02,029 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-10-21 19:45:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-21 19:45:02,030 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:45:02,030 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:02,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:45:02,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:45:02,241 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting getNumbers2Err1REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:45:02,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:02,241 INFO L82 PathProgramCache]: Analyzing trace with hash 256397901, now seen corresponding path program 5 times [2021-10-21 19:45:02,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:02,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819701135] [2021-10-21 19:45:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:02,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:02,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:45:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:02,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:45:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-21 19:45:02,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:02,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819701135] [2021-10-21 19:45:02,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819701135] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:02,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248817965] [2021-10-21 19:45:02,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:45:02,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:02,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:45:02,489 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:45:02,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:45:02,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-10-21 19:45:02,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:45:02,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-21 19:45:02,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:45:02,888 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:45:02,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 19:45:02,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-21 19:45:03,722 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:45:03,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 31 treesize of output 33 [2021-10-21 19:45:03,741 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-10-21 19:45:03,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 30 treesize of output 36 [2021-10-21 19:45:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-21 19:45:04,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248817965] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:04,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:45:04,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2021-10-21 19:45:04,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539699782] [2021-10-21 19:45:04,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:45:04,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:04,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:45:04,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:45:04,176 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 19 states, 18 states have (on average 3.111111111111111) internal successors, (56), 15 states have internal predecessors, (56), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:45:04,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:45:04,513 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-10-21 19:45:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:45:04,514 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.111111111111111) internal successors, (56), 15 states have internal predecessors, (56), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 60 [2021-10-21 19:45:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:45:04,515 INFO L225 Difference]: With dead ends: 79 [2021-10-21 19:45:04,515 INFO L226 Difference]: Without dead ends: 79 [2021-10-21 19:45:04,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 382.5ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:45:04,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-21 19:45:04,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-10-21 19:45:04,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 68 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:45:04,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-10-21 19:45:04,519 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 60 [2021-10-21 19:45:04,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:45:04,519 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-10-21 19:45:04,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.111111111111111) internal successors, (56), 15 states have internal predecessors, (56), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:45:04,519 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-10-21 19:45:04,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-21 19:45:04,520 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:45:04,520 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:04,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-21 19:45:04,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:04,737 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting getNumbers2Err1REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:45:04,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:04,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1410187191, now seen corresponding path program 6 times [2021-10-21 19:45:04,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:04,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757210335] [2021-10-21 19:45:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:04,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:04,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:45:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:04,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:45:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 19 proven. 38 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-21 19:45:05,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:05,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757210335] [2021-10-21 19:45:05,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757210335] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:05,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448628044] [2021-10-21 19:45:05,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:45:05,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:05,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:45:05,021 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:45:05,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:45:05,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-21 19:45:05,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:45:05,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-21 19:45:05,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:45:05,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-21 19:45:05,896 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:45:05,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-10-21 19:45:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-10-21 19:45:06,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448628044] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:45:06,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:45:06,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2021-10-21 19:45:06,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825728458] [2021-10-21 19:45:06,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:45:06,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:06,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:45:06,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:45:06,164 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:45:06,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:45:06,317 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2021-10-21 19:45:06,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:45:06,317 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2021-10-21 19:45:06,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:45:06,318 INFO L225 Difference]: With dead ends: 75 [2021-10-21 19:45:06,318 INFO L226 Difference]: Without dead ends: 75 [2021-10-21 19:45:06,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 380.0ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:45:06,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-21 19:45:06,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-10-21 19:45:06,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 64 states have (on average 1.0625) internal successors, (68), 66 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:45:06,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-10-21 19:45:06,323 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 65 [2021-10-21 19:45:06,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:45:06,324 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-10-21 19:45:06,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:45:06,324 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-10-21 19:45:06,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-10-21 19:45:06,325 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:45:06,325 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:06,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:45:06,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:06,529 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:45:06,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:06,529 INFO L82 PathProgramCache]: Analyzing trace with hash -368674019, now seen corresponding path program 1 times [2021-10-21 19:45:06,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:06,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927274610] [2021-10-21 19:45:06,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:06,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:06,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:45:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:06,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:45:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:06,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:45:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-21 19:45:06,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:06,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927274610] [2021-10-21 19:45:06,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927274610] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:06,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314640353] [2021-10-21 19:45:06,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:06,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:06,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:45:06,679 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:45:06,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:45:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:07,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:45:07,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:45:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-21 19:45:07,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314640353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:07,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:45:07,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-10-21 19:45:07,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657377432] [2021-10-21 19:45:07,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:45:07,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:07,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:45:07,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:45:07,309 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 11 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:45:07,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:45:07,374 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2021-10-21 19:45:07,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:45:07,375 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2021-10-21 19:45:07,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:45:07,375 INFO L225 Difference]: With dead ends: 83 [2021-10-21 19:45:07,375 INFO L226 Difference]: Without dead ends: 83 [2021-10-21 19:45:07,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:45:07,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-21 19:45:07,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2021-10-21 19:45:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 71 states have internal predecessors, (73), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:45:07,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-10-21 19:45:07,379 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 69 [2021-10-21 19:45:07,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:45:07,379 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-10-21 19:45:07,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:45:07,379 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-10-21 19:45:07,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-21 19:45:07,380 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:45:07,380 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:07,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:45:07,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:07,585 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:45:07,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:07,585 INFO L82 PathProgramCache]: Analyzing trace with hash -243103583, now seen corresponding path program 2 times [2021-10-21 19:45:07,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:07,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755599430] [2021-10-21 19:45:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:07,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:07,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:45:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:07,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:45:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:07,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:45:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-21 19:45:07,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:07,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755599430] [2021-10-21 19:45:07,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755599430] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:07,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144905562] [2021-10-21 19:45:07,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:45:07,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:07,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:45:07,745 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:45:07,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:45:08,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:45:08,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:45:08,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:45:08,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:45:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-21 19:45:08,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144905562] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:08,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:45:08,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2021-10-21 19:45:08,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717006885] [2021-10-21 19:45:08,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:45:08,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:08,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:45:08,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:45:08,372 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:45:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:45:08,457 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-10-21 19:45:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:45:08,458 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 74 [2021-10-21 19:45:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:45:08,459 INFO L225 Difference]: With dead ends: 88 [2021-10-21 19:45:08,459 INFO L226 Difference]: Without dead ends: 88 [2021-10-21 19:45:08,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:45:08,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-21 19:45:08,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2021-10-21 19:45:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 74 states have (on average 1.054054054054054) internal successors, (78), 76 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:45:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-10-21 19:45:08,463 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 74 [2021-10-21 19:45:08,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:45:08,463 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-10-21 19:45:08,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:45:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-10-21 19:45:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-21 19:45:08,464 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:45:08,464 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:08,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:45:08,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:08,674 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:45:08,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:08,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1204178333, now seen corresponding path program 3 times [2021-10-21 19:45:08,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:08,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941896383] [2021-10-21 19:45:08,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:08,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:08,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:45:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:08,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:45:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:08,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:45:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-21 19:45:08,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:08,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941896383] [2021-10-21 19:45:08,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941896383] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:08,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644665771] [2021-10-21 19:45:08,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:45:08,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:08,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:45:08,876 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:45:08,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:45:09,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-21 19:45:09,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:45:09,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:45:09,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:45:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-21 19:45:09,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644665771] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:09,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:45:09,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 13 [2021-10-21 19:45:09,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742620682] [2021-10-21 19:45:09,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:45:09,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:09,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:45:09,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:45:09,616 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:45:09,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:45:09,706 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2021-10-21 19:45:09,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:45:09,707 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 79 [2021-10-21 19:45:09,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:45:09,708 INFO L225 Difference]: With dead ends: 93 [2021-10-21 19:45:09,708 INFO L226 Difference]: Without dead ends: 93 [2021-10-21 19:45:09,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:45:09,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-21 19:45:09,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2021-10-21 19:45:09,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 81 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:45:09,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-10-21 19:45:09,713 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 79 [2021-10-21 19:45:09,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:45:09,714 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-10-21 19:45:09,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:45:09,714 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-10-21 19:45:09,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-21 19:45:09,716 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:45:09,716 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:09,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:45:09,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-21 19:45:09,937 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:45:09,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:09,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2025699807, now seen corresponding path program 4 times [2021-10-21 19:45:09,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:09,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053140095] [2021-10-21 19:45:09,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:09,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:09,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:45:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:09,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:45:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:10,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:45:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-21 19:45:10,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:10,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053140095] [2021-10-21 19:45:10,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053140095] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:10,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393360926] [2021-10-21 19:45:10,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:45:10,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:10,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:45:10,141 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:45:10,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:45:10,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:45:10,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:45:10,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:45:10,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:45:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-21 19:45:11,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393360926] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:11,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:45:11,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 14 [2021-10-21 19:45:11,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977473601] [2021-10-21 19:45:11,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:45:11,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:11,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:45:11,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:45:11,136 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:45:11,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:45:11,217 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2021-10-21 19:45:11,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:45:11,217 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 84 [2021-10-21 19:45:11,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:45:11,218 INFO L225 Difference]: With dead ends: 98 [2021-10-21 19:45:11,218 INFO L226 Difference]: Without dead ends: 98 [2021-10-21 19:45:11,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:45:11,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-21 19:45:11,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2021-10-21 19:45:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 86 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:45:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2021-10-21 19:45:11,220 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 84 [2021-10-21 19:45:11,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:45:11,220 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2021-10-21 19:45:11,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:45:11,228 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2021-10-21 19:45:11,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-21 19:45:11,228 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:45:11,228 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:11,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 19:45:11,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-21 19:45:11,429 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:45:11,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:11,429 INFO L82 PathProgramCache]: Analyzing trace with hash -809435107, now seen corresponding path program 5 times [2021-10-21 19:45:11,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:11,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21372981] [2021-10-21 19:45:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:11,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:11,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:45:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:11,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:45:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:11,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:45:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-21 19:45:11,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:11,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21372981] [2021-10-21 19:45:11,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21372981] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:11,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400255555] [2021-10-21 19:45:11,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:45:11,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:11,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:45:11,593 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:45:11,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 19:45:13,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-10-21 19:45:13,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:45:13,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:45:13,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:45:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-21 19:45:13,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400255555] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:13,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:45:13,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 15 [2021-10-21 19:45:13,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055223286] [2021-10-21 19:45:13,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:45:13,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:13,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:45:13,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:45:13,508 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 15 states, 14 states have (on average 4.5) internal successors, (63), 12 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:45:13,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:45:13,605 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2021-10-21 19:45:13,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:45:13,606 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.5) internal successors, (63), 12 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 89 [2021-10-21 19:45:13,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:45:13,607 INFO L225 Difference]: With dead ends: 103 [2021-10-21 19:45:13,607 INFO L226 Difference]: Without dead ends: 103 [2021-10-21 19:45:13,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:45:13,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-21 19:45:13,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2021-10-21 19:45:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 91 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:45:13,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-10-21 19:45:13,611 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 89 [2021-10-21 19:45:13,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:45:13,611 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-10-21 19:45:13,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.5) internal successors, (63), 12 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:45:13,612 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-10-21 19:45:13,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-21 19:45:13,612 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:45:13,613 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:13,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 19:45:13,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-21 19:45:13,835 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:45:13,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:13,836 INFO L82 PathProgramCache]: Analyzing trace with hash -2070731871, now seen corresponding path program 6 times [2021-10-21 19:45:13,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:13,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763254000] [2021-10-21 19:45:13,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:13,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:13,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:45:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:13,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-10-21 19:45:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:14,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:45:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:45:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-21 19:45:14,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:45:14,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763254000] [2021-10-21 19:45:14,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763254000] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:14,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182485564] [2021-10-21 19:45:14,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:45:14,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:45:14,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:45:14,049 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:45:14,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 19:45:15,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-10-21 19:45:15,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:45:15,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:45:15,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:45:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-21 19:45:15,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182485564] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:45:15,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:45:15,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-10-21 19:45:15,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979025003] [2021-10-21 19:45:15,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:45:15,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:45:15,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:45:15,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:45:15,784 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 13 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:45:15,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:45:15,884 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2021-10-21 19:45:15,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:45:15,885 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 13 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 94 [2021-10-21 19:45:15,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:45:15,886 INFO L225 Difference]: With dead ends: 104 [2021-10-21 19:45:15,886 INFO L226 Difference]: Without dead ends: 104 [2021-10-21 19:45:15,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:45:15,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-21 19:45:15,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-10-21 19:45:15,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 96 states have internal predecessors, (98), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:45:15,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2021-10-21 19:45:15,890 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 94 [2021-10-21 19:45:15,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:45:15,891 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2021-10-21 19:45:15,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 13 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 19:45:15,891 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2021-10-21 19:45:15,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-21 19:45:15,892 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:45:15,893 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:45:15,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 19:45:16,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-21 19:45:16,121 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0REQUIRES_VIOLATION === [getNumbers2Err0REQUIRES_VIOLATION, getNumbers2Err1REQUIRES_VIOLATION, getNumbers2Err2REQUIRES_VIOLATION, getNumbers2Err3REQUIRES_VIOLATION (and 5 more)] === [2021-10-21 19:45:16,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:45:16,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1646357859, now seen corresponding path program 7 times [2021-10-21 19:45:16,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:45:16,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331920241] [2021-10-21 19:45:16,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:45:16,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:45:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:45:16,220 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:45:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:45:16,335 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:45:16,335 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:45:16,336 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:45:16,338 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location getNumbers2Err0REQUIRES_VIOLATION [2021-10-21 19:45:16,339 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location getNumbers2Err1REQUIRES_VIOLATION [2021-10-21 19:45:16,339 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location getNumbers2Err2REQUIRES_VIOLATION [2021-10-21 19:45:16,339 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location getNumbers2Err3REQUIRES_VIOLATION [2021-10-21 19:45:16,340 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:45:16,340 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:45:16,340 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location getNumbersErr0REQUIRES_VIOLATION [2021-10-21 19:45:16,340 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location getNumbersErr1REQUIRES_VIOLATION [2021-10-21 19:45:16,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-21 19:45:16,356 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:45:16,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:45:16 BoogieIcfgContainer [2021-10-21 19:45:16,469 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:45:16,470 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:45:16,470 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:45:16,470 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:45:16,471 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:44:46" (3/4) ... [2021-10-21 19:45:16,473 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:45:16,543 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:45:16,543 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:45:16,544 INFO L168 Benchmark]: Toolchain (without parser) took 30352.83 ms. Allocated memory was 102.8 MB in the beginning and 203.4 MB in the end (delta: 100.7 MB). Free memory was 60.9 MB in the beginning and 90.6 MB in the end (delta: -29.7 MB). Peak memory consumption was 70.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:16,545 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 102.8 MB. Free memory is still 77.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:45:16,545 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.92 ms. Allocated memory is still 102.8 MB. Free memory was 60.7 MB in the beginning and 77.7 MB in the end (delta: -17.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:16,546 INFO L168 Benchmark]: Boogie Preprocessor took 31.51 ms. Allocated memory is still 102.8 MB. Free memory was 77.7 MB in the beginning and 76.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:16,547 INFO L168 Benchmark]: RCFGBuilder took 298.15 ms. Allocated memory is still 102.8 MB. Free memory was 76.0 MB in the beginning and 65.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:16,547 INFO L168 Benchmark]: TraceAbstraction took 29686.40 ms. Allocated memory was 102.8 MB in the beginning and 203.4 MB in the end (delta: 100.7 MB). Free memory was 64.9 MB in the beginning and 94.8 MB in the end (delta: -29.9 MB). Peak memory consumption was 72.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:16,548 INFO L168 Benchmark]: Witness Printer took 73.70 ms. Allocated memory is still 203.4 MB. Free memory was 94.8 MB in the beginning and 90.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:45:16,550 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 102.8 MB. Free memory is still 77.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 248.92 ms. Allocated memory is still 102.8 MB. Free memory was 60.7 MB in the beginning and 77.7 MB in the end (delta: -17.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.51 ms. Allocated memory is still 102.8 MB. Free memory was 77.7 MB in the beginning and 76.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 298.15 ms. Allocated memory is still 102.8 MB. Free memory was 76.0 MB in the beginning and 65.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 29686.40 ms. Allocated memory was 102.8 MB in the beginning and 203.4 MB in the end (delta: 100.7 MB). Free memory was 64.9 MB in the beginning and 94.8 MB in the end (delta: -29.9 MB). Peak memory consumption was 72.8 MB. Max. memory is 16.1 GB. * Witness Printer took 73.70 ms. Allocated memory is still 203.4 MB. Free memory was 94.8 MB in the beginning and 90.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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 - CounterExampleResult [Line: 26]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L1] int array[10]; VAL [\old(array)=null, \old(array)=null, array={11:0}] [L25] CALL, EXPR getNumbers2() VAL [array={11:0}] [L13] CALL, EXPR getNumbers() VAL [array={11:0}] [L5] int i = 0; VAL [array={11:0}, i=0] [L5] COND TRUE i < 10 VAL [array={11:0}, i=0] [L6] array[i] = i VAL [array={11:0}, i=0] [L5] ++i VAL [array={11:0}, i=1] [L5] COND TRUE i < 10 VAL [array={11:0}, i=1] [L6] array[i] = i VAL [array={11:0}, i=1] [L5] ++i VAL [array={11:0}, i=2] [L5] COND TRUE i < 10 VAL [array={11:0}, i=2] [L6] array[i] = i VAL [array={11:0}, i=2] [L5] ++i VAL [array={11:0}, i=3] [L5] COND TRUE i < 10 VAL [array={11:0}, i=3] [L6] array[i] = i VAL [array={11:0}, i=3] [L5] ++i VAL [array={11:0}, i=4] [L5] COND TRUE i < 10 VAL [array={11:0}, i=4] [L6] array[i] = i VAL [array={11:0}, i=4] [L5] ++i VAL [array={11:0}, i=5] [L5] COND TRUE i < 10 VAL [array={11:0}, i=5] [L6] array[i] = i VAL [array={11:0}, i=5] [L5] ++i VAL [array={11:0}, i=6] [L5] COND TRUE i < 10 VAL [array={11:0}, i=6] [L6] array[i] = i VAL [array={11:0}, i=6] [L5] ++i VAL [array={11:0}, i=7] [L5] COND TRUE i < 10 VAL [array={11:0}, i=7] [L6] array[i] = i VAL [array={11:0}, i=7] [L5] ++i VAL [array={11:0}, i=8] [L5] COND TRUE i < 10 VAL [array={11:0}, i=8] [L6] array[i] = i VAL [array={11:0}, i=8] [L5] ++i VAL [array={11:0}, i=9] [L5] COND TRUE i < 10 VAL [array={11:0}, i=9] [L6] array[i] = i VAL [array={11:0}, i=9] [L5] ++i VAL [array={11:0}, i=10] [L5] COND FALSE !(i < 10) VAL [array={11:0}, i=10] [L9] return array; VAL [\result={11:0}, array={11:0}, i=10] [L13] RET, EXPR getNumbers() VAL [array={11:0}, getNumbers()={11:0}] [L13] int* numbers = getNumbers(); [L15] int numbers2[10]; [L17] int i = 0; VAL [array={11:0}, i=0, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=0, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=0, numbers={11:0}, numbers2={10:0}, numbers[i]=0] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=0, numbers={11:0}, numbers2={10:0}, numbers[i]=0] [L17] ++i VAL [array={11:0}, i=1, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=1, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=1, numbers={11:0}, numbers2={10:0}, numbers[i]=1] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=1, numbers={11:0}, numbers2={10:0}, numbers[i]=1] [L17] ++i VAL [array={11:0}, i=2, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=2, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=2, numbers={11:0}, numbers2={10:0}, numbers[i]=2] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=2, numbers={11:0}, numbers2={10:0}, numbers[i]=2] [L17] ++i VAL [array={11:0}, i=3, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=3, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=3, numbers={11:0}, numbers2={10:0}, numbers[i]=3] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=3, numbers={11:0}, numbers2={10:0}, numbers[i]=3] [L17] ++i VAL [array={11:0}, i=4, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=4, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=4, numbers={11:0}, numbers2={10:0}, numbers[i]=4] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=4, numbers={11:0}, numbers2={10:0}, numbers[i]=4] [L17] ++i VAL [array={11:0}, i=5, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=5, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=5, numbers={11:0}, numbers2={10:0}, numbers[i]=5] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=5, numbers={11:0}, numbers2={10:0}, numbers[i]=5] [L17] ++i VAL [array={11:0}, i=6, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=6, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=6, numbers={11:0}, numbers2={10:0}, numbers[i]=6] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=6, numbers={11:0}, numbers2={10:0}, numbers[i]=6] [L17] ++i VAL [array={11:0}, i=7, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=7, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=7, numbers={11:0}, numbers2={10:0}, numbers[i]=7] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=7, numbers={11:0}, numbers2={10:0}, numbers[i]=7] [L17] ++i VAL [array={11:0}, i=8, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=8, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=8, numbers={11:0}, numbers2={10:0}, numbers[i]=8] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=8, numbers={11:0}, numbers2={10:0}, numbers[i]=8] [L17] ++i VAL [array={11:0}, i=9, numbers={11:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={11:0}, i=9, numbers={11:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={11:0}, i=9, numbers={11:0}, numbers2={10:0}, numbers[i]=9] [L18] numbers2[i] = numbers[i] VAL [array={11:0}, i=9, numbers={11:0}, numbers2={10:0}, numbers[i]=9] [L17] ++i VAL [array={11:0}, i=10, numbers={11:0}, numbers2={10:0}] [L17] COND FALSE !(i < 10) VAL [array={11:0}, i=10, numbers={11:0}, numbers2={10:0}] [L21] return numbers2; [L21] return numbers2; VAL [\result={10:0}, array={11:0}, i=10, numbers={11:0}] [L25] RET, EXPR getNumbers2() VAL [array={11:0}, getNumbers2()={10:0}] [L25] int *numbers = getNumbers2(); [L26] numbers[0] = 100 - UnprovableResult [Line: 18]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 18]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 18]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 18]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 26]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 24]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 6]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 6]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 29496.1ms, OverallIterations: 26, TraceHistogramMax: 10, EmptinessCheckTime: 49.3ms, AutomataDifference: 4295.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 624 SDtfs, 741 SDslu, 1924 SDs, 0 SdLazy, 2619 SolverSat, 217 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1864.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1429 GetRequests, 1095 SyntacticMatches, 3 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 3947.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=25, InterpolantAutomatonStates: 249, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 149.9ms AutomataMinimizationTime, 25 MinimizatonAttempts, 57 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 245.3ms SsaConstructionTime, 3182.8ms SatisfiabilityAnalysisTime, 10861.5ms InterpolantComputationTime, 2267 NumberOfCodeBlocks, 2130 NumberOfCodeBlocksAsserted, 92 NumberOfCheckSat, 2121 ConstructedInterpolants, 26 QuantifiedInterpolants, 10668 SizeOfPredicates, 40 NumberOfNonLiveVariables, 3567 ConjunctsInSsa, 288 ConjunctsInUnsatCore, 47 InterpolantComputations, 8 PerfectInterpolantSequences, 2935/4994 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 RESULT: Ultimate proved your program to be incorrect! [2021-10-21 19:45:16,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51c54990-6b87-4bab-ac31-28af0d9063e6/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...