./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c -s /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1b7166d94206693c3f254a3c1de8d5825f8510fb ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 09:00:11,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:00:11,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:00:11,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:00:11,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:00:11,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:00:11,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:00:11,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:00:11,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:00:11,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:00:11,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:00:11,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:00:11,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:00:11,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:00:11,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:00:11,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:00:11,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:00:11,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:00:11,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:00:11,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:00:11,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:00:11,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:00:11,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:00:11,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:00:11,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:00:11,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:00:11,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:00:11,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:00:11,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:00:11,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:00:11,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:00:11,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:00:11,920 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:00:11,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:00:11,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:00:11,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:00:11,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:00:11,926 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:00:11,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:00:11,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:00:11,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:00:11,928 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2019-10-22 09:00:11,940 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:00:11,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:00:11,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:00:11,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:00:11,951 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:00:11,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:00:11,952 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 09:00:11,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:00:11,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:00:11,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:00:11,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:00:11,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:00:11,953 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-10-22 09:00:11,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:00:11,953 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:00:11,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:00:11,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:00:11,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:00:11,954 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:00:11,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:00:11,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:00:11,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:00:11,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:00:11,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:00:11,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:00:11,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:00:11,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:00:11,955 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer 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 ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b7166d94206693c3f254a3c1de8d5825f8510fb [2019-10-22 09:00:11,994 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:00:12,004 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:00:12,007 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:00:12,008 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:00:12,009 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:00:12,009 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2019-10-22 09:00:12,056 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer/data/1049b9ef6/f3d25af732654e65a6a552eff1891b56/FLAG8f311d6f4 [2019-10-22 09:00:12,436 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:00:12,437 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2019-10-22 09:00:12,442 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer/data/1049b9ef6/f3d25af732654e65a6a552eff1891b56/FLAG8f311d6f4 [2019-10-22 09:00:12,848 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer/data/1049b9ef6/f3d25af732654e65a6a552eff1891b56 [2019-10-22 09:00:12,850 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:00:12,851 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:00:12,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:00:12,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:00:12,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:00:12,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:00:12" (1/1) ... [2019-10-22 09:00:12,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33407b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:12, skipping insertion in model container [2019-10-22 09:00:12,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:00:12" (1/1) ... [2019-10-22 09:00:12,867 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:00:12,880 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:00:13,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:00:13,024 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:00:13,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:00:13,154 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:00:13,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:13 WrapperNode [2019-10-22 09:00:13,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:00:13,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:00:13,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:00:13,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:00:13,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:13" (1/1) ... [2019-10-22 09:00:13,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:13" (1/1) ... [2019-10-22 09:00:13,184 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:00:13,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:00:13,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:00:13,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:00:13,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:13" (1/1) ... [2019-10-22 09:00:13,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:13" (1/1) ... [2019-10-22 09:00:13,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:13" (1/1) ... [2019-10-22 09:00:13,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:13" (1/1) ... [2019-10-22 09:00:13,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:13" (1/1) ... [2019-10-22 09:00:13,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:13" (1/1) ... [2019-10-22 09:00:13,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:13" (1/1) ... [2019-10-22 09:00:13,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:00:13,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:00:13,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:00:13,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:00:13,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:00:13,244 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-10-22 09:00:13,245 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-10-22 09:00:13,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:00:13,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:00:13,388 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:00:13,388 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 09:00:13,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:13 BoogieIcfgContainer [2019-10-22 09:00:13,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:00:13,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:00:13,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:00:13,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:00:13,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:00:12" (1/3) ... [2019-10-22 09:00:13,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@302b9d15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:00:13, skipping insertion in model container [2019-10-22 09:00:13,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:13" (2/3) ... [2019-10-22 09:00:13,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@302b9d15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:00:13, skipping insertion in model container [2019-10-22 09:00:13,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:13" (3/3) ... [2019-10-22 09:00:13,396 INFO L109 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2b.c [2019-10-22 09:00:13,406 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:00:13,412 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-10-22 09:00:13,422 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-10-22 09:00:13,444 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:00:13,453 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:00:13,453 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:00:13,453 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:00:13,453 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:00:13,454 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:00:13,454 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:00:13,454 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:00:13,483 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-22 09:00:13,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-10-22 09:00:13,499 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:13,500 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-10-22 09:00:13,501 INFO L410 AbstractCegarLoop]: === Iteration 1 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:00:13,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:13,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1454635077, now seen corresponding path program 1 times [2019-10-22 09:00:13,514 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:13,515 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527277174] [2019-10-22 09:00:13,515 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:13,515 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:13,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:13,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527277174] [2019-10-22 09:00:13,691 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:13,692 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 09:00:13,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881598087] [2019-10-22 09:00:13,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:00:13,697 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:13,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:00:13,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:00:13,709 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2019-10-22 09:00:13,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:13,822 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2019-10-22 09:00:13,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:00:13,824 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-10-22 09:00:13,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:13,832 INFO L225 Difference]: With dead ends: 41 [2019-10-22 09:00:13,833 INFO L226 Difference]: Without dead ends: 36 [2019-10-22 09:00:13,835 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:00:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-22 09:00:13,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-10-22 09:00:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 09:00:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-10-22 09:00:13,874 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 6 [2019-10-22 09:00:13,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:13,875 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-10-22 09:00:13,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:00:13,875 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-10-22 09:00:13,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 09:00:13,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:13,875 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:13,876 INFO L410 AbstractCegarLoop]: === Iteration 2 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:00:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:13,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2144014465, now seen corresponding path program 1 times [2019-10-22 09:00:13,876 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:13,876 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043055057] [2019-10-22 09:00:13,877 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:13,877 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:13,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:13,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043055057] [2019-10-22 09:00:13,906 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:13,906 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 09:00:13,907 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148544652] [2019-10-22 09:00:13,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:00:13,908 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:13,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:00:13,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:00:13,909 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 5 states. [2019-10-22 09:00:14,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:14,002 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2019-10-22 09:00:14,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:00:14,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-10-22 09:00:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:14,006 INFO L225 Difference]: With dead ends: 50 [2019-10-22 09:00:14,006 INFO L226 Difference]: Without dead ends: 46 [2019-10-22 09:00:14,007 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:00:14,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-22 09:00:14,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2019-10-22 09:00:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-22 09:00:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-10-22 09:00:14,022 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 7 [2019-10-22 09:00:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:14,022 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-10-22 09:00:14,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:00:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-10-22 09:00:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-22 09:00:14,023 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:14,023 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:14,023 INFO L410 AbstractCegarLoop]: === Iteration 3 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:00:14,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:14,024 INFO L82 PathProgramCache]: Analyzing trace with hash -736378463, now seen corresponding path program 1 times [2019-10-22 09:00:14,024 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:14,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925127174] [2019-10-22 09:00:14,024 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:14,024 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:14,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:14,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925127174] [2019-10-22 09:00:14,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26489097] [2019-10-22 09:00:14,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:14,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:00:14,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:14,138 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:14,138 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-10-22 09:00:14,138 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973740162] [2019-10-22 09:00:14,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 09:00:14,139 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:14,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 09:00:14,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:00:14,140 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 7 states. [2019-10-22 09:00:14,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:14,246 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2019-10-22 09:00:14,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 09:00:14,247 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-10-22 09:00:14,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:14,248 INFO L225 Difference]: With dead ends: 63 [2019-10-22 09:00:14,248 INFO L226 Difference]: Without dead ends: 62 [2019-10-22 09:00:14,249 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:00:14,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-22 09:00:14,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2019-10-22 09:00:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-22 09:00:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2019-10-22 09:00:14,267 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 12 [2019-10-22 09:00:14,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:14,267 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2019-10-22 09:00:14,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 09:00:14,268 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2019-10-22 09:00:14,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 09:00:14,268 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:14,268 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:14,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:14,469 INFO L410 AbstractCegarLoop]: === Iteration 4 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:00:14,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:14,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1009328462, now seen corresponding path program 1 times [2019-10-22 09:00:14,470 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:14,470 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372589178] [2019-10-22 09:00:14,470 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:14,470 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:14,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:00:14,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372589178] [2019-10-22 09:00:14,503 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:14,503 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 09:00:14,504 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478061353] [2019-10-22 09:00:14,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 09:00:14,504 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:14,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 09:00:14,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:00:14,505 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 4 states. [2019-10-22 09:00:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:14,528 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2019-10-22 09:00:14,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 09:00:14,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-22 09:00:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:14,531 INFO L225 Difference]: With dead ends: 78 [2019-10-22 09:00:14,531 INFO L226 Difference]: Without dead ends: 77 [2019-10-22 09:00:14,531 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 09:00:14,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-22 09:00:14,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2019-10-22 09:00:14,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-22 09:00:14,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2019-10-22 09:00:14,550 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 14 [2019-10-22 09:00:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:14,550 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2019-10-22 09:00:14,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 09:00:14,550 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2019-10-22 09:00:14,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 09:00:14,551 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:14,551 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:14,551 INFO L410 AbstractCegarLoop]: === Iteration 5 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:00:14,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:14,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1224411294, now seen corresponding path program 1 times [2019-10-22 09:00:14,551 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:14,552 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140041585] [2019-10-22 09:00:14,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:14,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:14,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:00:14,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140041585] [2019-10-22 09:00:14,574 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:14,575 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 09:00:14,575 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938170817] [2019-10-22 09:00:14,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 09:00:14,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:14,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 09:00:14,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:00:14,576 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 3 states. [2019-10-22 09:00:14,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:14,586 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2019-10-22 09:00:14,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 09:00:14,586 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-22 09:00:14,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:14,587 INFO L225 Difference]: With dead ends: 66 [2019-10-22 09:00:14,587 INFO L226 Difference]: Without dead ends: 65 [2019-10-22 09:00:14,588 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 09:00:14,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-22 09:00:14,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-10-22 09:00:14,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-22 09:00:14,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2019-10-22 09:00:14,597 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 15 [2019-10-22 09:00:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:14,597 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2019-10-22 09:00:14,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 09:00:14,598 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2019-10-22 09:00:14,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 09:00:14,598 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:14,598 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2019-10-22 09:00:14,599 INFO L410 AbstractCegarLoop]: === Iteration 6 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:00:14,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:14,599 INFO L82 PathProgramCache]: Analyzing trace with hash -231947135, now seen corresponding path program 2 times [2019-10-22 09:00:14,599 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:14,599 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356815390] [2019-10-22 09:00:14,599 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:14,600 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:14,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:14,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356815390] [2019-10-22 09:00:14,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607850371] [2019-10-22 09:00:14,691 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:14,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:00:14,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:14,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 09:00:14,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:14,738 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:14,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-10-22 09:00:14,739 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834176164] [2019-10-22 09:00:14,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 09:00:14,742 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:14,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 09:00:14,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:00:14,744 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand 9 states. [2019-10-22 09:00:14,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:14,919 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2019-10-22 09:00:14,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 09:00:14,922 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-10-22 09:00:14,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:14,923 INFO L225 Difference]: With dead ends: 85 [2019-10-22 09:00:14,923 INFO L226 Difference]: Without dead ends: 84 [2019-10-22 09:00:14,923 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-10-22 09:00:14,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-22 09:00:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2019-10-22 09:00:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-22 09:00:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2019-10-22 09:00:14,944 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 17 [2019-10-22 09:00:14,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:14,944 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2019-10-22 09:00:14,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 09:00:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2019-10-22 09:00:14,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 09:00:14,951 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:14,951 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:15,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:15,152 INFO L410 AbstractCegarLoop]: === Iteration 7 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:00:15,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:15,152 INFO L82 PathProgramCache]: Analyzing trace with hash -855233152, now seen corresponding path program 1 times [2019-10-22 09:00:15,152 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:15,153 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228041233] [2019-10-22 09:00:15,153 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:15,153 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:15,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:00:15,210 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228041233] [2019-10-22 09:00:15,210 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:15,210 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 09:00:15,211 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676267800] [2019-10-22 09:00:15,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:00:15,211 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:15,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:00:15,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:00:15,211 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand 6 states. [2019-10-22 09:00:15,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:15,332 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2019-10-22 09:00:15,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 09:00:15,333 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-10-22 09:00:15,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:15,334 INFO L225 Difference]: With dead ends: 117 [2019-10-22 09:00:15,334 INFO L226 Difference]: Without dead ends: 116 [2019-10-22 09:00:15,335 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:00:15,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-10-22 09:00:15,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2019-10-22 09:00:15,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-22 09:00:15,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2019-10-22 09:00:15,349 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 19 [2019-10-22 09:00:15,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:15,349 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2019-10-22 09:00:15,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:00:15,350 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2019-10-22 09:00:15,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-22 09:00:15,350 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:15,350 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:15,351 INFO L410 AbstractCegarLoop]: === Iteration 8 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:00:15,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:15,351 INFO L82 PathProgramCache]: Analyzing trace with hash -742423898, now seen corresponding path program 1 times [2019-10-22 09:00:15,351 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:15,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535270821] [2019-10-22 09:00:15,352 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:15,352 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:15,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:00:15,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535270821] [2019-10-22 09:00:15,393 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:15,393 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 09:00:15,394 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973363294] [2019-10-22 09:00:15,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:00:15,394 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:15,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:00:15,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:00:15,395 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 6 states. [2019-10-22 09:00:15,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:15,458 INFO L93 Difference]: Finished difference Result 130 states and 174 transitions. [2019-10-22 09:00:15,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:00:15,458 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-22 09:00:15,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:15,459 INFO L225 Difference]: With dead ends: 130 [2019-10-22 09:00:15,460 INFO L226 Difference]: Without dead ends: 66 [2019-10-22 09:00:15,461 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:00:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-22 09:00:15,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 35. [2019-10-22 09:00:15,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-22 09:00:15,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2019-10-22 09:00:15,467 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2019-10-22 09:00:15,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:15,468 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2019-10-22 09:00:15,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:00:15,468 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2019-10-22 09:00:15,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 09:00:15,469 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:15,469 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1] [2019-10-22 09:00:15,469 INFO L410 AbstractCegarLoop]: === Iteration 9 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:00:15,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:15,470 INFO L82 PathProgramCache]: Analyzing trace with hash -559247967, now seen corresponding path program 3 times [2019-10-22 09:00:15,470 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:15,470 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484325450] [2019-10-22 09:00:15,470 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:15,470 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:15,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:15,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484325450] [2019-10-22 09:00:15,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984087319] [2019-10-22 09:00:15,551 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:15,576 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 09:00:15,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:15,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 09:00:15,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:15,586 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:15,586 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-10-22 09:00:15,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301694230] [2019-10-22 09:00:15,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 09:00:15,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:15,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 09:00:15,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:00:15,587 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 11 states. [2019-10-22 09:00:15,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:15,753 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2019-10-22 09:00:15,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-22 09:00:15,753 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2019-10-22 09:00:15,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:15,754 INFO L225 Difference]: With dead ends: 62 [2019-10-22 09:00:15,755 INFO L226 Difference]: Without dead ends: 61 [2019-10-22 09:00:15,755 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-10-22 09:00:15,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-22 09:00:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2019-10-22 09:00:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-22 09:00:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-10-22 09:00:15,762 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 22 [2019-10-22 09:00:15,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:15,763 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-10-22 09:00:15,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 09:00:15,763 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-10-22 09:00:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-22 09:00:15,764 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:15,764 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:15,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:15,965 INFO L410 AbstractCegarLoop]: === Iteration 10 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:00:15,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:15,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1606295908, now seen corresponding path program 2 times [2019-10-22 09:00:15,965 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:15,965 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243062998] [2019-10-22 09:00:15,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:15,966 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:15,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:00:16,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243062998] [2019-10-22 09:00:16,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935126236] [2019-10-22 09:00:16,041 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:16,068 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:00:16,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:16,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:00:16,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:00:16,079 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:16,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-10-22 09:00:16,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319368363] [2019-10-22 09:00:16,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 09:00:16,080 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:16,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 09:00:16,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:00:16,083 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 8 states. [2019-10-22 09:00:16,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:16,205 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2019-10-22 09:00:16,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 09:00:16,205 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-10-22 09:00:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:16,206 INFO L225 Difference]: With dead ends: 70 [2019-10-22 09:00:16,206 INFO L226 Difference]: Without dead ends: 54 [2019-10-22 09:00:16,207 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:00:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-22 09:00:16,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2019-10-22 09:00:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-22 09:00:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-10-22 09:00:16,221 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 25 [2019-10-22 09:00:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:16,221 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-10-22 09:00:16,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 09:00:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-10-22 09:00:16,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 09:00:16,222 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:16,222 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1] [2019-10-22 09:00:16,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:16,426 INFO L410 AbstractCegarLoop]: === Iteration 11 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:00:16,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:16,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1828550785, now seen corresponding path program 4 times [2019-10-22 09:00:16,427 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:16,427 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352596732] [2019-10-22 09:00:16,427 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:16,427 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:16,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:16,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352596732] [2019-10-22 09:00:16,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84488797] [2019-10-22 09:00:16,512 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:16,537 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:00:16,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:16,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 09:00:16,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-22 09:00:16,590 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:16,590 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 13 [2019-10-22 09:00:16,591 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239677227] [2019-10-22 09:00:16,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 09:00:16,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:16,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 09:00:16,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-10-22 09:00:16,592 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 14 states. [2019-10-22 09:00:16,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:16,658 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2019-10-22 09:00:16,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:00:16,658 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-10-22 09:00:16,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:16,659 INFO L225 Difference]: With dead ends: 61 [2019-10-22 09:00:16,659 INFO L226 Difference]: Without dead ends: 60 [2019-10-22 09:00:16,660 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-10-22 09:00:16,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-22 09:00:16,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2019-10-22 09:00:16,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-22 09:00:16,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-10-22 09:00:16,664 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2019-10-22 09:00:16,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:16,664 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-10-22 09:00:16,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 09:00:16,665 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-10-22 09:00:16,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-22 09:00:16,665 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:16,665 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:16,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:16,866 INFO L410 AbstractCegarLoop]: === Iteration 12 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 09:00:16,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:16,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1103662182, now seen corresponding path program 3 times [2019-10-22 09:00:16,866 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:16,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378143024] [2019-10-22 09:00:16,867 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:16,867 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:16,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:00:16,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378143024] [2019-10-22 09:00:16,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149640732] [2019-10-22 09:00:16,971 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:17,003 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-22 09:00:17,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:17,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 09:00:17,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:00:17,010 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:17,010 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-10-22 09:00:17,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559523765] [2019-10-22 09:00:17,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 09:00:17,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:17,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 09:00:17,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:00:17,011 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 10 states. [2019-10-22 09:00:17,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:17,152 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2019-10-22 09:00:17,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 09:00:17,153 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-10-22 09:00:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:17,154 INFO L225 Difference]: With dead ends: 42 [2019-10-22 09:00:17,154 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 09:00:17,154 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-10-22 09:00:17,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 09:00:17,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 09:00:17,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 09:00:17,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 09:00:17,155 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2019-10-22 09:00:17,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:17,155 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 09:00:17,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 09:00:17,155 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 09:00:17,155 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 09:00:17,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:17,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 09:00:17,798 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 26 [2019-10-22 09:00:17,889 INFO L443 ceAbstractionStarter]: For program point gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-10-22 09:00:17,889 INFO L443 ceAbstractionStarter]: For program point gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-10-22 09:00:17,889 INFO L443 ceAbstractionStarter]: For program point gFINAL(lines 10 16) no Hoare annotation was computed. [2019-10-22 09:00:17,889 INFO L443 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2019-10-22 09:00:17,889 INFO L443 ceAbstractionStarter]: For program point L15-1(line 15) no Hoare annotation was computed. [2019-10-22 09:00:17,890 INFO L439 ceAbstractionStarter]: At program point L15-2(line 15) the Hoare annotation is: (and (or (or (not (<= |g_#in~x| 2147483647)) (not (<= 0 |g_#in~x|))) (and (<= 0 g_~x) (<= g_~x 2147483647) (not (= 0 g_~x)))) (or (<= 2 g_~x) (not (<= 2 |g_#in~x|)) (not (<= |g_#in~x| 2)))) [2019-10-22 09:00:17,890 INFO L443 ceAbstractionStarter]: For program point L12(lines 12 15) no Hoare annotation was computed. [2019-10-22 09:00:17,890 INFO L443 ceAbstractionStarter]: For program point L15-3(line 15) no Hoare annotation was computed. [2019-10-22 09:00:17,890 INFO L443 ceAbstractionStarter]: For program point L15-4(line 15) no Hoare annotation was computed. [2019-10-22 09:00:17,890 INFO L443 ceAbstractionStarter]: For program point L15-5(line 15) no Hoare annotation was computed. [2019-10-22 09:00:17,890 INFO L439 ceAbstractionStarter]: At program point L15-6(line 15) the Hoare annotation is: (let ((.cse0 (not (<= |g_#in~x| 2147483647))) (.cse1 (not (<= 0 |g_#in~x|)))) (and (or (and (and (<= g_~x 2147483647) (<= |g_#t~ret0| 1)) (<= 1 |g_#t~ret0|)) (or .cse0 .cse1)) (or (not (<= 2 |g_#in~x|)) (not (<= |g_#in~x| 2))) (or (<= 1 g_~x) .cse0 .cse1))) [2019-10-22 09:00:17,890 INFO L443 ceAbstractionStarter]: For program point gEXIT(lines 10 16) no Hoare annotation was computed. [2019-10-22 09:00:17,891 INFO L443 ceAbstractionStarter]: For program point L15-7(line 15) no Hoare annotation was computed. [2019-10-22 09:00:17,891 INFO L443 ceAbstractionStarter]: For program point gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-10-22 09:00:17,891 INFO L446 ceAbstractionStarter]: At program point gENTRY(lines 10 16) the Hoare annotation is: true [2019-10-22 09:00:17,891 INFO L443 ceAbstractionStarter]: For program point gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2019-10-22 09:00:17,891 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 09:00:17,891 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 09:00:17,891 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 09:00:17,891 INFO L439 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2147483647) (<= 0 ULTIMATE.start_main_~x~0)) [2019-10-22 09:00:17,891 INFO L443 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2019-10-22 09:00:17,892 INFO L443 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2019-10-22 09:00:17,892 INFO L439 ceAbstractionStarter]: At program point L18(lines 18 22) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2019-10-22 09:00:17,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:00:17 BoogieIcfgContainer [2019-10-22 09:00:17,904 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:00:17,904 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:00:17,905 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:00:17,906 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:00:17,907 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:13" (3/4) ... [2019-10-22 09:00:17,910 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 09:00:17,917 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure g [2019-10-22 09:00:17,923 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-10-22 09:00:17,923 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 09:00:17,966 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_37397836-9580-4adc-8f21-6148b8522ca4/bin/uautomizer/witness.graphml [2019-10-22 09:00:17,966 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:00:17,968 INFO L168 Benchmark]: Toolchain (without parser) took 5116.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 188.2 MB). Free memory was 944.4 MB in the beginning and 963.6 MB in the end (delta: -19.1 MB). Peak memory consumption was 169.1 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:17,968 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:00:17,969 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 188.2 MB). Free memory was 944.4 MB in the beginning and 1.2 GB in the end (delta: -238.6 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:17,971 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.74 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:00:17,972 INFO L168 Benchmark]: Boogie Preprocessor took 15.45 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:00:17,972 INFO L168 Benchmark]: RCFGBuilder took 189.55 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:17,972 INFO L168 Benchmark]: TraceAbstraction took 4514.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 970.4 MB in the end (delta: 194.3 MB). Peak memory consumption was 194.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:17,973 INFO L168 Benchmark]: Witness Printer took 62.11 ms. Allocated memory is still 1.2 GB. Free memory was 970.4 MB in the beginning and 963.6 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:17,974 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 302.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 188.2 MB). Free memory was 944.4 MB in the beginning and 1.2 GB in the end (delta: -238.6 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.74 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.45 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 189.55 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4514.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 970.4 MB in the end (delta: 194.3 MB). Peak memory consumption was 194.3 MB. Max. memory is 11.5 GB. * Witness Printer took 62.11 ms. Allocated memory is still 1.2 GB. Free memory was 970.4 MB in the beginning and 963.6 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: x <= 2147483647 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 4 error locations. Result: SAFE, OverallTime: 4.4s, OverallIterations: 12, TraceHistogramMax: 5, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, HoareTripleCheckerStatistics: 201 SDtfs, 335 SDslu, 659 SDs, 0 SdLazy, 621 SolverSat, 115 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 250 GetRequests, 146 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 126 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 62 PreInvPairs, 67 NumberOfFragments, 88 HoareAnnotationTreeSize, 62 FomulaSimplifications, 18128 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 5 FomulaSimplificationsInter, 4818 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 347 NumberOfCodeBlocks, 347 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 329 ConstructedInterpolants, 0 QuantifiedInterpolants, 21879 SizeOfPredicates, 19 NumberOfNonLiveVariables, 265 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 131/307 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...