./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c_true-no-overflow_true-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c_true-no-overflow_true-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/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 14df269faa4a77275028af94d8141ab36c184cf5 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 13:26:04,343 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 13:26:04,344 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 13:26:04,353 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 13:26:04,354 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 13:26:04,354 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 13:26:04,355 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 13:26:04,357 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 13:26:04,358 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 13:26:04,359 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 13:26:04,360 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 13:26:04,360 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 13:26:04,360 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 13:26:04,361 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 13:26:04,362 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 13:26:04,363 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 13:26:04,363 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 13:26:04,364 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 13:26:04,366 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 13:26:04,367 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 13:26:04,368 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 13:26:04,369 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 13:26:04,370 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 13:26:04,371 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 13:26:04,371 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 13:26:04,371 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 13:26:04,372 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 13:26:04,373 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 13:26:04,374 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 13:26:04,375 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 13:26:04,375 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 13:26:04,375 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 13:26:04,376 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 13:26:04,376 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 13:26:04,377 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 13:26:04,377 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 13:26:04,377 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2018-11-28 13:26:04,388 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 13:26:04,388 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 13:26:04,389 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 13:26:04,389 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 13:26:04,389 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 13:26:04,390 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 13:26:04,390 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 13:26:04,390 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 13:26:04,390 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-28 13:26:04,390 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 13:26:04,390 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 13:26:04,391 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 13:26:04,391 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 13:26:04,391 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 13:26:04,391 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-28 13:26:04,391 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 13:26:04,391 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 13:26:04,391 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 13:26:04,392 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 13:26:04,392 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 13:26:04,392 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 13:26:04,392 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 13:26:04,392 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:26:04,392 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 13:26:04,393 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 13:26:04,393 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 13:26:04,393 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 13:26:04,393 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 13:26:04,393 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 13:26:04,393 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/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 -> 14df269faa4a77275028af94d8141ab36c184cf5 [2018-11-28 13:26:04,420 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 13:26:04,431 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 13:26:04,434 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 13:26:04,435 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 13:26:04,436 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 13:26:04,436 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-28 13:26:04,489 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/data/6dbf578c7/724915dc5d4d4aa4976796d5d64cb416/FLAGbd110049b [2018-11-28 13:26:04,829 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 13:26:04,829 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/sv-benchmarks/c/termination-crafted/NestedRecursion_2c_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-28 13:26:04,833 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/data/6dbf578c7/724915dc5d4d4aa4976796d5d64cb416/FLAGbd110049b [2018-11-28 13:26:05,247 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/data/6dbf578c7/724915dc5d4d4aa4976796d5d64cb416 [2018-11-28 13:26:05,249 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 13:26:05,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 13:26:05,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 13:26:05,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 13:26:05,253 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 13:26:05,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:26:05" (1/1) ... [2018-11-28 13:26:05,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a46a70f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:26:05, skipping insertion in model container [2018-11-28 13:26:05,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:26:05" (1/1) ... [2018-11-28 13:26:05,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 13:26:05,268 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 13:26:05,353 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:26:05,355 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 13:26:05,363 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:26:05,372 INFO L195 MainTranslator]: Completed translation [2018-11-28 13:26:05,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:26:05 WrapperNode [2018-11-28 13:26:05,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 13:26:05,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 13:26:05,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 13:26:05,373 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 13:26:05,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:26:05" (1/1) ... [2018-11-28 13:26:05,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:26:05" (1/1) ... [2018-11-28 13:26:05,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 13:26:05,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 13:26:05,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 13:26:05,386 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 13:26:05,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:26:05" (1/1) ... [2018-11-28 13:26:05,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:26:05" (1/1) ... [2018-11-28 13:26:05,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:26:05" (1/1) ... [2018-11-28 13:26:05,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:26:05" (1/1) ... [2018-11-28 13:26:05,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:26:05" (1/1) ... [2018-11-28 13:26:05,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:26:05" (1/1) ... [2018-11-28 13:26:05,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:26:05" (1/1) ... [2018-11-28 13:26:05,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 13:26:05,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 13:26:05,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 13:26:05,398 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 13:26:05,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:26:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/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 [2018-11-28 13:26:05,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 13:26:05,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 13:26:05,473 INFO L130 BoogieDeclarations]: Found specification of procedure g [2018-11-28 13:26:05,473 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2018-11-28 13:26:05,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 13:26:05,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 13:26:05,473 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 13:26:05,474 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 13:26:05,577 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 13:26:05,577 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 13:26:05,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:26:05 BoogieIcfgContainer [2018-11-28 13:26:05,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 13:26:05,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 13:26:05,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 13:26:05,581 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 13:26:05,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 01:26:05" (1/3) ... [2018-11-28 13:26:05,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b26f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:26:05, skipping insertion in model container [2018-11-28 13:26:05,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:26:05" (2/3) ... [2018-11-28 13:26:05,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b26f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:26:05, skipping insertion in model container [2018-11-28 13:26:05,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:26:05" (3/3) ... [2018-11-28 13:26:05,584 INFO L112 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2c_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-28 13:26:05,593 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 13:26:05,600 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-11-28 13:26:05,615 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-11-28 13:26:05,642 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 13:26:05,643 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 13:26:05,643 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 13:26:05,643 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 13:26:05,643 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 13:26:05,643 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 13:26:05,643 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 13:26:05,643 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 13:26:05,644 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 13:26:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-11-28 13:26:05,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-28 13:26:05,664 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:05,664 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:05,666 INFO L423 AbstractCegarLoop]: === Iteration 1 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:05,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:05,672 INFO L82 PathProgramCache]: Analyzing trace with hash -774276160, now seen corresponding path program 1 times [2018-11-28 13:26:05,674 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:05,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:05,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:05,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:26:05,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:26:05,794 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:26:05,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:26:05,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:26:05,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:26:05,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:26:05,807 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2018-11-28 13:26:05,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:05,902 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2018-11-28 13:26:05,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 13:26:05,903 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-11-28 13:26:05,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:05,913 INFO L225 Difference]: With dead ends: 46 [2018-11-28 13:26:05,913 INFO L226 Difference]: Without dead ends: 40 [2018-11-28 13:26:05,915 INFO L631 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 [2018-11-28 13:26:05,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-28 13:26:05,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2018-11-28 13:26:05,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-28 13:26:05,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2018-11-28 13:26:05,948 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 10 [2018-11-28 13:26:05,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:05,948 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2018-11-28 13:26:05,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:26:05,949 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2018-11-28 13:26:05,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-28 13:26:05,949 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:05,949 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:05,949 INFO L423 AbstractCegarLoop]: === Iteration 2 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:05,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:05,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1767242855, now seen corresponding path program 1 times [2018-11-28 13:26:05,950 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:05,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:05,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:05,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:26:05,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:26:05,995 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:26:05,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:26:05,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:26:05,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:26:05,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:26:05,997 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 5 states. [2018-11-28 13:26:06,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:06,059 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2018-11-28 13:26:06,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 13:26:06,059 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-28 13:26:06,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:06,060 INFO L225 Difference]: With dead ends: 54 [2018-11-28 13:26:06,060 INFO L226 Difference]: Without dead ends: 50 [2018-11-28 13:26:06,061 INFO L631 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 [2018-11-28 13:26:06,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-28 13:26:06,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2018-11-28 13:26:06,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-28 13:26:06,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2018-11-28 13:26:06,067 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 11 [2018-11-28 13:26:06,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:06,067 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2018-11-28 13:26:06,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:26:06,067 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2018-11-28 13:26:06,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-28 13:26:06,068 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:06,068 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:06,068 INFO L423 AbstractCegarLoop]: === Iteration 3 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:06,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:06,068 INFO L82 PathProgramCache]: Analyzing trace with hash -601436741, now seen corresponding path program 1 times [2018-11-28 13:26:06,069 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:06,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:06,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:06,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:26:06,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:26:06,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:26:06,129 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:26:06,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:26:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:06,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:26:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:26:06,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:26:06,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 13:26:06,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 13:26:06,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 13:26:06,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-28 13:26:06,190 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 7 states. [2018-11-28 13:26:06,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:06,303 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2018-11-28 13:26:06,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 13:26:06,303 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-11-28 13:26:06,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:06,305 INFO L225 Difference]: With dead ends: 67 [2018-11-28 13:26:06,305 INFO L226 Difference]: Without dead ends: 66 [2018-11-28 13:26:06,305 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-11-28 13:26:06,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-28 13:26:06,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2018-11-28 13:26:06,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-28 13:26:06,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2018-11-28 13:26:06,315 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 16 [2018-11-28 13:26:06,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:06,315 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2018-11-28 13:26:06,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 13:26:06,315 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2018-11-28 13:26:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-28 13:26:06,316 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:06,316 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:06,316 INFO L423 AbstractCegarLoop]: === Iteration 4 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:06,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:06,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1839303495, now seen corresponding path program 1 times [2018-11-28 13:26:06,317 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:06,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:06,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:06,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:26:06,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 13:26:06,350 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:26:06,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 13:26:06,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 13:26:06,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 13:26:06,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 13:26:06,351 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 3 states. [2018-11-28 13:26:06,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:06,359 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2018-11-28 13:26:06,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 13:26:06,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2018-11-28 13:26:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:06,361 INFO L225 Difference]: With dead ends: 56 [2018-11-28 13:26:06,361 INFO L226 Difference]: Without dead ends: 55 [2018-11-28 13:26:06,362 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 13:26:06,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-28 13:26:06,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-11-28 13:26:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-28 13:26:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2018-11-28 13:26:06,369 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 18 [2018-11-28 13:26:06,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:06,369 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2018-11-28 13:26:06,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 13:26:06,369 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2018-11-28 13:26:06,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-28 13:26:06,370 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:06,370 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:06,370 INFO L423 AbstractCegarLoop]: === Iteration 5 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:06,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:06,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1183833542, now seen corresponding path program 1 times [2018-11-28 13:26:06,371 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:06,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:06,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:06,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:26:06,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 13:26:06,397 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:26:06,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 13:26:06,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-28 13:26:06,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-28 13:26:06,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:26:06,398 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 4 states. [2018-11-28 13:26:06,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:06,433 INFO L93 Difference]: Finished difference Result 81 states and 105 transitions. [2018-11-28 13:26:06,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-28 13:26:06,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-11-28 13:26:06,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:06,434 INFO L225 Difference]: With dead ends: 81 [2018-11-28 13:26:06,434 INFO L226 Difference]: Without dead ends: 80 [2018-11-28 13:26:06,435 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-28 13:26:06,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-11-28 13:26:06,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2018-11-28 13:26:06,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-11-28 13:26:06,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2018-11-28 13:26:06,444 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 19 [2018-11-28 13:26:06,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:06,444 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2018-11-28 13:26:06,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-28 13:26:06,445 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2018-11-28 13:26:06,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-28 13:26:06,445 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:06,445 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:06,446 INFO L423 AbstractCegarLoop]: === Iteration 6 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:06,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:06,446 INFO L82 PathProgramCache]: Analyzing trace with hash -544755481, now seen corresponding path program 2 times [2018-11-28 13:26:06,446 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:06,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:06,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:06,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:26:06,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:26:06,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:26:06,506 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:26:06,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:26:06,523 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:26:06,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:26:06,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:26:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:26:06,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:26:06,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-28 13:26:06,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 13:26:06,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 13:26:06,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-11-28 13:26:06,556 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 9 states. [2018-11-28 13:26:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:06,691 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2018-11-28 13:26:06,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 13:26:06,692 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2018-11-28 13:26:06,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:06,693 INFO L225 Difference]: With dead ends: 94 [2018-11-28 13:26:06,693 INFO L226 Difference]: Without dead ends: 93 [2018-11-28 13:26:06,694 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2018-11-28 13:26:06,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-11-28 13:26:06,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2018-11-28 13:26:06,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-28 13:26:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2018-11-28 13:26:06,704 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 21 [2018-11-28 13:26:06,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:06,704 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2018-11-28 13:26:06,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 13:26:06,705 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2018-11-28 13:26:06,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-28 13:26:06,705 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:06,705 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:06,708 INFO L423 AbstractCegarLoop]: === Iteration 7 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:06,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:06,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1671679351, now seen corresponding path program 1 times [2018-11-28 13:26:06,708 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:06,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:06,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:06,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:26:06,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 13:26:06,737 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:26:06,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 13:26:06,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 13:26:06,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 13:26:06,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:26:06,738 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand 6 states. [2018-11-28 13:26:06,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:06,848 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2018-11-28 13:26:06,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 13:26:06,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-11-28 13:26:06,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:06,852 INFO L225 Difference]: With dead ends: 121 [2018-11-28 13:26:06,852 INFO L226 Difference]: Without dead ends: 120 [2018-11-28 13:26:06,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-11-28 13:26:06,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-11-28 13:26:06,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2018-11-28 13:26:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-11-28 13:26:06,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 147 transitions. [2018-11-28 13:26:06,864 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 147 transitions. Word has length 23 [2018-11-28 13:26:06,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:06,865 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 147 transitions. [2018-11-28 13:26:06,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 13:26:06,865 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 147 transitions. [2018-11-28 13:26:06,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-28 13:26:06,867 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:06,867 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:06,868 INFO L423 AbstractCegarLoop]: === Iteration 8 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:06,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:06,868 INFO L82 PathProgramCache]: Analyzing trace with hash -282452290, now seen corresponding path program 1 times [2018-11-28 13:26:06,868 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:06,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:06,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:06,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:26:06,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 13:26:06,918 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:26:06,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 13:26:06,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 13:26:06,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 13:26:06,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:26:06,919 INFO L87 Difference]: Start difference. First operand 113 states and 147 transitions. Second operand 6 states. [2018-11-28 13:26:07,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:07,020 INFO L93 Difference]: Finished difference Result 139 states and 178 transitions. [2018-11-28 13:26:07,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 13:26:07,021 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2018-11-28 13:26:07,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:07,022 INFO L225 Difference]: With dead ends: 139 [2018-11-28 13:26:07,022 INFO L226 Difference]: Without dead ends: 138 [2018-11-28 13:26:07,023 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-11-28 13:26:07,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-11-28 13:26:07,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2018-11-28 13:26:07,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-11-28 13:26:07,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 164 transitions. [2018-11-28 13:26:07,037 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 164 transitions. Word has length 24 [2018-11-28 13:26:07,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:07,038 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 164 transitions. [2018-11-28 13:26:07,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 13:26:07,039 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 164 transitions. [2018-11-28 13:26:07,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-28 13:26:07,039 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:07,039 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:07,040 INFO L423 AbstractCegarLoop]: === Iteration 9 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:07,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:07,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1622021829, now seen corresponding path program 3 times [2018-11-28 13:26:07,040 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:07,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:07,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:07,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:26:07,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:26:07,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:26:07,140 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:26:07,146 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:26:07,153 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 13:26:07,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:26:07,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:26:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:26:07,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:26:07,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-28 13:26:07,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 13:26:07,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 13:26:07,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-28 13:26:07,179 INFO L87 Difference]: Start difference. First operand 129 states and 164 transitions. Second operand 11 states. [2018-11-28 13:26:07,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:07,282 INFO L93 Difference]: Finished difference Result 154 states and 196 transitions. [2018-11-28 13:26:07,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 13:26:07,282 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2018-11-28 13:26:07,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:07,283 INFO L225 Difference]: With dead ends: 154 [2018-11-28 13:26:07,283 INFO L226 Difference]: Without dead ends: 153 [2018-11-28 13:26:07,284 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-11-28 13:26:07,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-11-28 13:26:07,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2018-11-28 13:26:07,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-11-28 13:26:07,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 187 transitions. [2018-11-28 13:26:07,298 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 187 transitions. Word has length 26 [2018-11-28 13:26:07,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:07,298 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 187 transitions. [2018-11-28 13:26:07,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 13:26:07,299 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 187 transitions. [2018-11-28 13:26:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-28 13:26:07,300 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:07,300 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:07,301 INFO L423 AbstractCegarLoop]: === Iteration 10 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:07,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:07,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1947044292, now seen corresponding path program 2 times [2018-11-28 13:26:07,301 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:07,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:07,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:07,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:26:07,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 13:26:07,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:26:07,362 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:26:07,369 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:26:07,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:26:07,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:26:07,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:26:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 13:26:07,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:26:07,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-28 13:26:07,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 13:26:07,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 13:26:07,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:26:07,405 INFO L87 Difference]: Start difference. First operand 147 states and 187 transitions. Second operand 8 states. [2018-11-28 13:26:07,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:07,522 INFO L93 Difference]: Finished difference Result 178 states and 228 transitions. [2018-11-28 13:26:07,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 13:26:07,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-28 13:26:07,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:07,524 INFO L225 Difference]: With dead ends: 178 [2018-11-28 13:26:07,524 INFO L226 Difference]: Without dead ends: 177 [2018-11-28 13:26:07,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-11-28 13:26:07,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-11-28 13:26:07,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 165. [2018-11-28 13:26:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-11-28 13:26:07,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 210 transitions. [2018-11-28 13:26:07,536 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 210 transitions. Word has length 29 [2018-11-28 13:26:07,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:07,536 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 210 transitions. [2018-11-28 13:26:07,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 13:26:07,536 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 210 transitions. [2018-11-28 13:26:07,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-28 13:26:07,537 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:07,537 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:07,537 INFO L423 AbstractCegarLoop]: === Iteration 11 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:07,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:07,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1283573095, now seen corresponding path program 4 times [2018-11-28 13:26:07,538 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:07,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:07,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:07,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:26:07,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:26:07,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:26:07,602 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:26:07,608 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:26:07,614 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:26:07,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:26:07,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:26:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-11-28 13:26:07,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:26:07,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 13 [2018-11-28 13:26:07,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 13:26:07,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 13:26:07,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-11-28 13:26:07,666 INFO L87 Difference]: Start difference. First operand 165 states and 210 transitions. Second operand 14 states. [2018-11-28 13:26:07,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:07,737 INFO L93 Difference]: Finished difference Result 169 states and 219 transitions. [2018-11-28 13:26:07,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 13:26:07,738 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2018-11-28 13:26:07,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:07,739 INFO L225 Difference]: With dead ends: 169 [2018-11-28 13:26:07,739 INFO L226 Difference]: Without dead ends: 168 [2018-11-28 13:26:07,739 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2018-11-28 13:26:07,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-11-28 13:26:07,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 165. [2018-11-28 13:26:07,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-11-28 13:26:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 209 transitions. [2018-11-28 13:26:07,750 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 209 transitions. Word has length 31 [2018-11-28 13:26:07,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:07,751 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 209 transitions. [2018-11-28 13:26:07,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 13:26:07,751 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 209 transitions. [2018-11-28 13:26:07,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-28 13:26:07,752 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:07,752 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:07,753 INFO L423 AbstractCegarLoop]: === Iteration 12 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:07,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:07,753 INFO L82 PathProgramCache]: Analyzing trace with hash 634524286, now seen corresponding path program 3 times [2018-11-28 13:26:07,753 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:07,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:07,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:07,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:26:07,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 13:26:07,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:26:07,816 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:26:07,836 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:26:07,852 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-11-28 13:26:07,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:26:07,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:26:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 13:26:07,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:26:07,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-28 13:26:07,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 13:26:07,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 13:26:07,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-28 13:26:07,875 INFO L87 Difference]: Start difference. First operand 165 states and 209 transitions. Second operand 10 states. [2018-11-28 13:26:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:08,033 INFO L93 Difference]: Finished difference Result 198 states and 252 transitions. [2018-11-28 13:26:08,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 13:26:08,034 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-11-28 13:26:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:08,035 INFO L225 Difference]: With dead ends: 198 [2018-11-28 13:26:08,035 INFO L226 Difference]: Without dead ends: 197 [2018-11-28 13:26:08,036 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2018-11-28 13:26:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-11-28 13:26:08,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 183. [2018-11-28 13:26:08,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-11-28 13:26:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 232 transitions. [2018-11-28 13:26:08,044 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 232 transitions. Word has length 34 [2018-11-28 13:26:08,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:08,044 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 232 transitions. [2018-11-28 13:26:08,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 13:26:08,044 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 232 transitions. [2018-11-28 13:26:08,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-28 13:26:08,045 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:08,046 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:08,046 INFO L423 AbstractCegarLoop]: === Iteration 13 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:08,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:08,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1824264805, now seen corresponding path program 1 times [2018-11-28 13:26:08,046 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:08,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:08,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:08,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:26:08,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-28 13:26:08,069 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:26:08,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:26:08,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:26:08,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:26:08,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:26:08,070 INFO L87 Difference]: Start difference. First operand 183 states and 232 transitions. Second operand 5 states. [2018-11-28 13:26:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:08,094 INFO L93 Difference]: Finished difference Result 183 states and 232 transitions. [2018-11-28 13:26:08,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:26:08,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2018-11-28 13:26:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:08,096 INFO L225 Difference]: With dead ends: 183 [2018-11-28 13:26:08,096 INFO L226 Difference]: Without dead ends: 182 [2018-11-28 13:26:08,096 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:26:08,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-11-28 13:26:08,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2018-11-28 13:26:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-11-28 13:26:08,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 222 transitions. [2018-11-28 13:26:08,103 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 222 transitions. Word has length 35 [2018-11-28 13:26:08,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:08,104 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 222 transitions. [2018-11-28 13:26:08,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:26:08,104 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 222 transitions. [2018-11-28 13:26:08,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-28 13:26:08,104 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:08,104 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:08,104 INFO L423 AbstractCegarLoop]: === Iteration 14 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:08,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:08,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1057484292, now seen corresponding path program 4 times [2018-11-28 13:26:08,105 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:08,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:08,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:08,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:26:08,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 13:26:08,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:26:08,167 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:26:08,173 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:26:08,181 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:26:08,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:26:08,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:26:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-28 13:26:08,231 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 13:26:08,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2018-11-28 13:26:08,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 13:26:08,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 13:26:08,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-11-28 13:26:08,232 INFO L87 Difference]: Start difference. First operand 182 states and 222 transitions. Second operand 16 states. [2018-11-28 13:26:08,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:08,325 INFO L93 Difference]: Finished difference Result 243 states and 307 transitions. [2018-11-28 13:26:08,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 13:26:08,330 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2018-11-28 13:26:08,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:08,330 INFO L225 Difference]: With dead ends: 243 [2018-11-28 13:26:08,331 INFO L226 Difference]: Without dead ends: 115 [2018-11-28 13:26:08,332 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2018-11-28 13:26:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-11-28 13:26:08,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2018-11-28 13:26:08,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-11-28 13:26:08,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 130 transitions. [2018-11-28 13:26:08,344 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 130 transitions. Word has length 39 [2018-11-28 13:26:08,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:08,344 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 130 transitions. [2018-11-28 13:26:08,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 13:26:08,344 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 130 transitions. [2018-11-28 13:26:08,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-28 13:26:08,345 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:08,345 INFO L402 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:08,347 INFO L423 AbstractCegarLoop]: === Iteration 15 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:08,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:08,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1307639896, now seen corresponding path program 1 times [2018-11-28 13:26:08,348 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:08,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:08,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:08,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:26:08,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-28 13:26:08,406 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:26:08,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-28 13:26:08,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:26:08,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:26:08,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:26:08,407 INFO L87 Difference]: Start difference. First operand 110 states and 130 transitions. Second operand 5 states. [2018-11-28 13:26:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:08,498 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2018-11-28 13:26:08,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 13:26:08,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2018-11-28 13:26:08,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:08,502 INFO L225 Difference]: With dead ends: 110 [2018-11-28 13:26:08,502 INFO L226 Difference]: Without dead ends: 109 [2018-11-28 13:26:08,502 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-28 13:26:08,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-11-28 13:26:08,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-11-28 13:26:08,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-28 13:26:08,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 129 transitions. [2018-11-28 13:26:08,509 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 129 transitions. Word has length 39 [2018-11-28 13:26:08,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:08,510 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 129 transitions. [2018-11-28 13:26:08,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:26:08,510 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 129 transitions. [2018-11-28 13:26:08,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-28 13:26:08,510 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:08,511 INFO L402 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:08,511 INFO L423 AbstractCegarLoop]: === Iteration 16 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:08,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:08,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1882131073, now seen corresponding path program 1 times [2018-11-28 13:26:08,511 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:08,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:08,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:08,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:26:08,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-28 13:26:08,558 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:26:08,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 13:26:08,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 13:26:08,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 13:26:08,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-28 13:26:08,559 INFO L87 Difference]: Start difference. First operand 109 states and 129 transitions. Second operand 7 states. [2018-11-28 13:26:08,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:08,666 INFO L93 Difference]: Finished difference Result 128 states and 152 transitions. [2018-11-28 13:26:08,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 13:26:08,667 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2018-11-28 13:26:08,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:08,668 INFO L225 Difference]: With dead ends: 128 [2018-11-28 13:26:08,668 INFO L226 Difference]: Without dead ends: 127 [2018-11-28 13:26:08,668 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-11-28 13:26:08,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-11-28 13:26:08,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2018-11-28 13:26:08,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-11-28 13:26:08,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2018-11-28 13:26:08,676 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 40 [2018-11-28 13:26:08,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:08,676 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2018-11-28 13:26:08,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 13:26:08,676 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2018-11-28 13:26:08,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-28 13:26:08,677 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:08,677 INFO L402 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:08,677 INFO L423 AbstractCegarLoop]: === Iteration 17 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:08,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:08,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1047280733, now seen corresponding path program 2 times [2018-11-28 13:26:08,680 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:08,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:08,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:08,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:26:08,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-28 13:26:08,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:26:08,738 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:26:08,746 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:26:08,753 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:26:08,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:26:08,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:26:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-28 13:26:08,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:26:08,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-28 13:26:08,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 13:26:08,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 13:26:08,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-11-28 13:26:08,777 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand 9 states. [2018-11-28 13:26:08,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:08,887 INFO L93 Difference]: Finished difference Result 144 states and 166 transitions. [2018-11-28 13:26:08,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 13:26:08,888 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2018-11-28 13:26:08,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:08,888 INFO L225 Difference]: With dead ends: 144 [2018-11-28 13:26:08,888 INFO L226 Difference]: Without dead ends: 143 [2018-11-28 13:26:08,889 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2018-11-28 13:26:08,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-11-28 13:26:08,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-11-28 13:26:08,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-11-28 13:26:08,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 165 transitions. [2018-11-28 13:26:08,894 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 165 transitions. Word has length 45 [2018-11-28 13:26:08,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:08,894 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 165 transitions. [2018-11-28 13:26:08,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 13:26:08,894 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 165 transitions. [2018-11-28 13:26:08,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-28 13:26:08,895 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:08,895 INFO L402 BasicCegarLoop]: trace histogram [7, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:08,895 INFO L423 AbstractCegarLoop]: === Iteration 18 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:08,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:08,895 INFO L82 PathProgramCache]: Analyzing trace with hash 483404799, now seen corresponding path program 3 times [2018-11-28 13:26:08,895 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:08,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:08,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:08,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:26:08,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-28 13:26:08,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:26:08,958 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:26:08,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:26:08,987 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-28 13:26:08,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:26:08,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:26:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-28 13:26:09,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:26:09,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-28 13:26:09,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 13:26:09,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 13:26:09,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-11-28 13:26:09,019 INFO L87 Difference]: Start difference. First operand 143 states and 165 transitions. Second operand 11 states. [2018-11-28 13:26:09,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:09,186 INFO L93 Difference]: Finished difference Result 162 states and 187 transitions. [2018-11-28 13:26:09,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-28 13:26:09,194 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2018-11-28 13:26:09,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:09,194 INFO L225 Difference]: With dead ends: 162 [2018-11-28 13:26:09,194 INFO L226 Difference]: Without dead ends: 161 [2018-11-28 13:26:09,195 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2018-11-28 13:26:09,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-11-28 13:26:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-11-28 13:26:09,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-11-28 13:26:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2018-11-28 13:26:09,203 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 50 [2018-11-28 13:26:09,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:09,204 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2018-11-28 13:26:09,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 13:26:09,204 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2018-11-28 13:26:09,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-28 13:26:09,205 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:09,205 INFO L402 BasicCegarLoop]: trace histogram [8, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:09,205 INFO L423 AbstractCegarLoop]: === Iteration 19 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:09,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:09,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2081594659, now seen corresponding path program 4 times [2018-11-28 13:26:09,206 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:09,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:09,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:09,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:26:09,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 62 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-28 13:26:09,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:26:09,278 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:26:09,285 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:26:09,294 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:26:09,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:26:09,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:26:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 62 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-28 13:26:09,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:26:09,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-28 13:26:09,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 13:26:09,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 13:26:09,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-11-28 13:26:09,321 INFO L87 Difference]: Start difference. First operand 161 states and 186 transitions. Second operand 13 states. [2018-11-28 13:26:09,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:09,565 INFO L93 Difference]: Finished difference Result 180 states and 208 transitions. [2018-11-28 13:26:09,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-28 13:26:09,566 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2018-11-28 13:26:09,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:09,567 INFO L225 Difference]: With dead ends: 180 [2018-11-28 13:26:09,567 INFO L226 Difference]: Without dead ends: 179 [2018-11-28 13:26:09,568 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2018-11-28 13:26:09,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-11-28 13:26:09,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-11-28 13:26:09,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-11-28 13:26:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 207 transitions. [2018-11-28 13:26:09,576 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 207 transitions. Word has length 55 [2018-11-28 13:26:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:09,576 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 207 transitions. [2018-11-28 13:26:09,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 13:26:09,576 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 207 transitions. [2018-11-28 13:26:09,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-28 13:26:09,577 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:26:09,577 INFO L402 BasicCegarLoop]: trace histogram [9, 7, 7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:26:09,578 INFO L423 AbstractCegarLoop]: === Iteration 20 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-28 13:26:09,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:26:09,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1729970815, now seen corresponding path program 5 times [2018-11-28 13:26:09,578 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:26:09,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:26:09,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:09,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:26:09,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:26:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:26:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 46 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-28 13:26:09,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:26:09,718 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:26:09,728 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:26:09,750 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-11-28 13:26:09,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:26:09,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:26:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-11-28 13:26:09,828 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 13:26:09,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 20 [2018-11-28 13:26:09,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 13:26:09,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 13:26:09,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2018-11-28 13:26:09,828 INFO L87 Difference]: Start difference. First operand 179 states and 207 transitions. Second operand 20 states. [2018-11-28 13:26:09,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:26:09,877 INFO L93 Difference]: Finished difference Result 219 states and 255 transitions. [2018-11-28 13:26:09,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 13:26:09,878 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-11-28 13:26:09,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:26:09,878 INFO L225 Difference]: With dead ends: 219 [2018-11-28 13:26:09,879 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 13:26:09,879 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2018-11-28 13:26:09,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 13:26:09,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 13:26:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 13:26:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 13:26:09,880 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 60 [2018-11-28 13:26:09,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:26:09,880 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 13:26:09,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 13:26:09,880 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 13:26:09,880 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 13:26:09,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 13:26:09,920 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 13:26:09,923 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 13:26:09,930 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 13:26:09,934 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 13:26:09,937 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 13:26:09,941 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 13:26:10,039 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 13:26:10,039 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 13:26:10,039 INFO L448 ceAbstractionStarter]: For program point gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2018-11-28 13:26:10,039 INFO L448 ceAbstractionStarter]: For program point gFINAL(lines 10 16) no Hoare annotation was computed. [2018-11-28 13:26:10,039 INFO L448 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-11-28 13:26:10,039 INFO L448 ceAbstractionStarter]: For program point L15-1(line 15) no Hoare annotation was computed. [2018-11-28 13:26:10,039 INFO L444 ceAbstractionStarter]: At program point L15-2(line 15) the Hoare annotation is: (and (or (and (<= 0 g_~x) (<= g_~x 2147483647) (not (= 0 g_~x))) (< |g_#in~x| 0) (< 2147483647 |g_#in~x|)) (not (= |g_#in~x| 0))) [2018-11-28 13:26:10,039 INFO L448 ceAbstractionStarter]: For program point L12(lines 12 15) no Hoare annotation was computed. [2018-11-28 13:26:10,039 INFO L448 ceAbstractionStarter]: For program point L15-3(line 15) no Hoare annotation was computed. [2018-11-28 13:26:10,039 INFO L448 ceAbstractionStarter]: For program point L15-4(line 15) no Hoare annotation was computed. [2018-11-28 13:26:10,040 INFO L448 ceAbstractionStarter]: For program point gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2018-11-28 13:26:10,040 INFO L448 ceAbstractionStarter]: For program point L15-5(line 15) no Hoare annotation was computed. [2018-11-28 13:26:10,040 INFO L444 ceAbstractionStarter]: At program point L15-6(line 15) the Hoare annotation is: (and (not (= |g_#in~x| 0)) (or (and (<= 0 g_~x) (= 1 |g_#t~ret0|) (<= g_~x 2147483647) (not (= 0 g_~x))) (< |g_#in~x| 0) (< 2147483647 |g_#in~x|))) [2018-11-28 13:26:10,040 INFO L448 ceAbstractionStarter]: For program point gEXIT(lines 10 16) no Hoare annotation was computed. [2018-11-28 13:26:10,040 INFO L448 ceAbstractionStarter]: For program point L15-7(line 15) no Hoare annotation was computed. [2018-11-28 13:26:10,040 INFO L451 ceAbstractionStarter]: At program point gENTRY(lines 10 16) the Hoare annotation is: true [2018-11-28 13:26:10,040 INFO L448 ceAbstractionStarter]: For program point gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2018-11-28 13:26:10,040 INFO L448 ceAbstractionStarter]: For program point gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2018-11-28 13:26:10,040 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 13:26:10,040 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 13:26:10,040 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 13:26:10,040 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 13:26:10,041 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 18 22) the Hoare annotation is: true [2018-11-28 13:26:10,041 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 18 22) no Hoare annotation was computed. [2018-11-28 13:26:10,041 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 18 22) no Hoare annotation was computed. [2018-11-28 13:26:10,041 INFO L444 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (and (<= main_~x~0 2147483647) (<= 0 main_~x~0)) [2018-11-28 13:26:10,041 INFO L448 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-11-28 13:26:10,041 INFO L448 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2018-11-28 13:26:10,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 01:26:10 BoogieIcfgContainer [2018-11-28 13:26:10,043 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 13:26:10,044 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 13:26:10,044 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 13:26:10,044 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 13:26:10,044 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:26:05" (3/4) ... [2018-11-28 13:26:10,047 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 13:26:10,052 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 13:26:10,052 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure g [2018-11-28 13:26:10,053 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 13:26:10,056 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2018-11-28 13:26:10,056 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-28 13:26:10,056 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 13:26:10,084 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_75488684-7bfd-4f7f-9f22-cb4cf6ac1e07/bin-2019/uautomizer/witness.graphml [2018-11-28 13:26:10,084 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 13:26:10,085 INFO L168 Benchmark]: Toolchain (without parser) took 4835.29 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 253.2 MB). Free memory was 953.3 MB in the beginning and 1.1 GB in the end (delta: -173.4 MB). Peak memory consumption was 79.9 MB. Max. memory is 11.5 GB. [2018-11-28 13:26:10,086 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:26:10,086 INFO L168 Benchmark]: CACSL2BoogieTranslator took 121.42 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-28 13:26:10,086 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.70 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:26:10,087 INFO L168 Benchmark]: Boogie Preprocessor took 11.01 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:26:10,087 INFO L168 Benchmark]: RCFGBuilder took 179.96 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 71.8 MB). Free memory was 942.5 MB in the beginning and 1.0 GB in the end (delta: -106.1 MB). Peak memory consumption was 15.3 MB. Max. memory is 11.5 GB. [2018-11-28 13:26:10,087 INFO L168 Benchmark]: TraceAbstraction took 4465.29 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 181.4 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -85.3 MB). Peak memory consumption was 96.1 MB. Max. memory is 11.5 GB. [2018-11-28 13:26:10,087 INFO L168 Benchmark]: Witness Printer took 40.99 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 11.5 GB. [2018-11-28 13:26:10,089 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 121.42 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.70 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.01 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 179.96 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 71.8 MB). Free memory was 942.5 MB in the beginning and 1.0 GB in the end (delta: -106.1 MB). Peak memory consumption was 15.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4465.29 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 181.4 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -85.3 MB). Peak memory consumption was 96.1 MB. Max. memory is 11.5 GB. * Witness Printer took 40.99 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 28 locations, 4 error locations. SAFE Result, 4.4s OverallTime, 20 OverallIterations, 9 TraceHistogramMax, 2.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 461 SDtfs, 662 SDslu, 1992 SDs, 0 SdLazy, 1550 SolverSat, 348 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 671 GetRequests, 425 SyntacticMatches, 4 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 89 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 173 PreInvPairs, 191 NumberOfFragments, 65 HoareAnnotationTreeSize, 173 FomulaSimplifications, 631 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 401 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 1031 NumberOfCodeBlocks, 986 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 1000 ConstructedInterpolants, 0 QuantifiedInterpolants, 89882 SizeOfPredicates, 30 NumberOfNonLiveVariables, 736 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 31 InterpolantComputations, 11 PerfectInterpolantSequences, 934/1271 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...